Hello, 大家好！
我是不作死就不会死，智商不在线，但颜值超有品的拆家队大队长 ——咖啡汪
一只不是在戏精，就是在戏精路上的极品二哈
前几天刚做了java通过Excel 模板导出复杂统计类excel文档这么一个小功能，特此记录下，分享给需要的小伙伴

示例用的框架是nuoyi的单体前后端分离框架，开源地址：https://gitee.com/y_project/RuoYi-Vue
首先让我们先来看一下要求：
（1）这是客户提供的模板：

(2) 这是本汪修改后的模板：

（3）这是最终实现的可导出的excel:

pom.xml 文件引入 poi 依赖：

 <!-- jxls poi Husky Yue -->
        <dependency>
            <groupId>org.jxls</groupId>
            <artifactId>jxls-poi</artifactId>
            <version>2.10.0</version>
        </dependency>
        <dependency>
            <groupId>org.jxls</groupId>
            <artifactId>jxls</artifactId>
            <version>2.10.0</version>
        </dependency>
        <dependency>
            <groupId>net.sf.jxls</groupId>
            <artifactId>jxls-core</artifactId>
            <version>1.0.6</version>
        </dependency>

为了解决大家依赖问题，现提供项目原始pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	
    <groupId>com.cccc</groupId>
    <artifactId>cccc</artifactId>
    <version>3.2.0</version>

    <name>cccc</name>
    <url></url>
    <description>数字园区管理平台</description>
    
    <properties>
        <cccc.version>3.2.0</cccc.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <maven-jar-plugin.version>3.1.1</maven-jar-plugin.version>
        <druid.version>1.2.1</druid.version>
        <bitwalker.version>1.19</bitwalker.version>
        <swagger.version>2.9.2</swagger.version>
		<kaptcha.version>2.3.2</kaptcha.version>
        <pagehelper.boot.version>1.3.0</pagehelper.boot.version>
        <fastjson.version>1.2.74</fastjson.version>
        <oshi.version>5.2.5</oshi.version>
        <jna.version>5.5.0</jna.version>
        <commons.io.version>2.5</commons.io.version>
        <commons.fileupload.version>1.3.3</commons.fileupload.version>
        <poi.version>3.17</poi.version>
        <velocity.version>1.7</velocity.version>
        <jwt.version>0.9.1</jwt.version>
    </properties>
	
    <!-- 依赖声明 -->
    <dependencyManagement>
        <dependencies>
        
            <!-- SpringBoot的依赖配置-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.2.6.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            
            <!--阿里数据库连接池 -->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                <version>${druid.version}</version>
            </dependency>
	        
            <!-- 解析客户端操作系统、浏览器等 -->
            <dependency>
                <groupId>eu.bitwalker</groupId>
                <artifactId>UserAgentUtils</artifactId>
                <version>${bitwalker.version}</version>
            </dependency>
			
            <!-- pagehelper 分页插件 -->
            <dependency>
                <groupId>com.github.pagehelper</groupId>
                <artifactId>pagehelper-spring-boot-starter</artifactId>
                <version>${pagehelper.boot.version}</version>
            </dependency>
			
            <!-- 获取系统信息 -->
            <dependency>
                <groupId>com.github.oshi</groupId>
                <artifactId>oshi-core</artifactId>
                <version>${oshi.version}</version>
            </dependency>

            <dependency>
                <groupId>net.java.dev.jna</groupId>
                <artifactId>jna</artifactId>
                <version>${jna.version}</version>
            </dependency>

            <dependency>
                <groupId>net.java.dev.jna</groupId>
                <artifactId>jna-platform</artifactId>
                <version>${jna.version}</version>
            </dependency>
			
            <!-- swagger2-->
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger2</artifactId>
                <version>${swagger.version}</version>
                <exclusions>
                    <exclusion>
                        <groupId>io.swagger</groupId>
                        <artifactId>swagger-annotations</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>io.swagger</groupId>
                        <artifactId>swagger-models</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
			
            <!-- swagger2-UI-->
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger-ui</artifactId>
                <version>${swagger.version}</version>
            </dependency>
            
            <!--io常用工具类 -->
            <dependency>
                <groupId>commons-io</groupId>
                <artifactId>commons-io</artifactId>
                <version>${commons.io.version}</version>
            </dependency>
	
            <!--文件上传工具类 -->
            <dependency>
                <groupId>commons-fileupload</groupId>
                <artifactId>commons-fileupload</artifactId>
                <version>${commons.fileupload.version}</version>
            </dependency>
			
            <!-- excel工具 -->
            <dependency>
                <groupId>org.apache.poi</groupId>
                <artifactId>poi-ooxml</artifactId>
                <version>${poi.version}</version>
            </dependency>
			
            <!--velocity代码生成使用模板 -->
            <dependency>
                <groupId>org.apache.velocity</groupId>
                <artifactId>velocity</artifactId>
                <version>${velocity.version}</version>
            </dependency>
	        
            <!-- 阿里JSON解析器 -->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>${fastjson.version}</version>
            </dependency>
			
            <!--Token生成与解析-->
            <dependency>
                <groupId>io.jsonwebtoken</groupId>
                <artifactId>jjwt</artifactId>
                <version>${jwt.version}</version>
            </dependency>
			
            <!--验证码 -->
            <dependency>
                <groupId>com.github.penggle</groupId>
                <artifactId>kaptcha</artifactId>
                <version>${kaptcha.version}</version>
            </dependency>
            
            <!-- 定时任务-->
            <dependency>
                <groupId>com.cccc</groupId>
                <artifactId>cccc-quartz</artifactId>
                <version>${cccc.version}</version>
            </dependency>
	
            <!-- 代码生成-->
            <dependency>
                <groupId>com.cccc</groupId>
                <artifactId>cccc-generator</artifactId>
                <version>${cccc.version}</version>
            </dependency>
			
            <!-- 核心模块-->
            <dependency>
                <groupId>com.cccc</groupId>
                <artifactId>cccc-framework</artifactId>
                <version>${cccc.version}</version>
            </dependency>
			
            <!-- 系统模块-->
            <dependency>
                <groupId>com.cccc</groupId>
                <artifactId>cccc-system</artifactId>
                <version>${cccc.version}</version>
            </dependency>
			
            <!-- 通用工具-->
            <dependency>
                <groupId>com.cccc</groupId>
                <artifactId>cccc-common</artifactId>
                <version>${cccc.version}</version>
            </dependency>
            <!-- actviti-->
            <dependency>
                <groupId>com.cccc</groupId>
                <artifactId>cccc-activiti</artifactId>
                <version>${cccc.version}</version>
            </dependency>
            <dependency>
                <groupId>com.cccc</groupId>
                <artifactId>cccc-workflow</artifactId>
                <version>${cccc.version}</version>
            </dependency>
            <dependency>
                <groupId>com.cccc</groupId>
                <artifactId>cccc-terminal</artifactId>
                <version>${cccc.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <modules>
        <module>cccc-admin</module>
        <module>cccc-framework</module>
        <module>cccc-system</module>
        <module>cccc-quartz</module>
        <module>cccc-generator</module>
        <module>cccc-common</module>
        <module>cccc-activiti</module>
        <module>cccc-workflow</module>
        <module>cccc-business</module>
        <module>cccc-terminal</module>
    </modules>
    <packaging>pom</packaging>


    <dependencies>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                    <encoding>${project.build.sourceEncoding}</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>public</id>
            <name>aliyun nexus</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
            <releases>
                <enabled>true</enabled>
            </releases>
        </repository>
    </repositories>

    <pluginRepositories>
        <pluginRepository>
            <id>public</id>
            <name>aliyun nexus</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

</project>

service

/**
     * 根据考勤统计模板导出部门考勤统计记录
     *
     * @param countDo
     */
    @Override
    public AjaxResult exportTemplateProvinceAreaData(CountDo countDo) {
        String fileName = "";
        AjaxResult result = new AjaxResult();
        //查询考勤日历
        CcccCheckonworkCalendar ccccCheckonworkCalendar = new CcccCheckonworkCalendar();
        System.out.println("查询日期" +DateUtils.getDateByStandardString(countDo.getStartDate()) );
        ccccCheckonworkCalendar.setCalendarDate(DateUtils.getDateByStandardString(countDo.getStartDate()));
        List<CcccCheckonworkCalendar> calendars = ccccCheckonworkCalendarMapper.selectCcccCheckonworkCalendarList(ccccCheckonworkCalendar);
        // 获取每个员工实际出勤天数
        List<EmployeeCountDo> list = ccccCheckonworkCardCountService.listEmployeeCount(countDo);
        if (list.size() == 0) {
            return result;
        }
        SysDept sysDept = sysDeptMapper.selectDeptById(countDo.getDeptId());
        //获取每个员工某个月每天的全部打卡记录
        List<TemplateCheckonworkCalenderCount> templateCheckonworkCalenderCountList = new ArrayList<>();
        CcccCheckonworkCardCountDto dto = new CcccCheckonworkCardCountDto();
        dto.setId(countDo.getDeptId());
        dto.setStartDate(countDo.getStartDate());
        dto.setEndDate(countDo.getEndDate());
        //查询出该部门所有人员某个月全部的考勤记录
        List<CcccCheckonworkCardCount> ccccCheckonworkCardCountList = ccccCheckonworkCardCountService.selectCcccCheckonworkCardCountListByCcccCheckonworkCardCountDto(dto);
        list.forEach(employeeCountDo -> {
            //某一个人当月全部的考勤记录
            List<CcccCheckonworkCardCount> list1 = ccccCheckonworkCardCountList.parallelStream().filter(i -> i.getEmployeeId() == employeeCountDo.getEmployeeId()).collect(Collectors.toList());
            TemplateCheckonworkCalenderCount templateCount = new TemplateCheckonworkCalenderCount();
            templateCount.setEmployeeId(employeeCountDo.getEmployeeId());
            templateCount.setEmployeeName(employeeCountDo.getEmployeeName());
            templateCount.setRealNum(employeeCountDo.getRealName());
            // 1.所有日子都记录为公休 "×"
            // 2.所有上班日子都记录为倒休 "D"
            calendars.stream().filter(cal -> cal.getIsRest() == 0 ).forEach(c -> {
                templateByZhongJiaoRest(templateCount, c);

            });
            // 3.当天上班记录均为正常则记为正常打卡 "/"
            list1.forEach(c -> {
                templateByZhongJiao(templateCount, c);
            });

            //将 实际出勤天数放入导出模板类中
            templateCount.setRealNum(employeeCountDo.getRealName());
            templateCheckonworkCalenderCountList.add(templateCount);

        });
        try {
            for (int i = 0; i < list.size(); i++) {
                templateCheckonworkCalenderCountList.get(i).setEmployeeId(i + 1L);
            }
            Map<String, Object> param = new HashMap<>();
            param.put("dept", sysDept.getDeptName());
            param.put("date", countDo.getStartDate());
            param.put("needNum", list.get(0).getNeedName());
            param.put("list", templateCheckonworkCalenderCountList);
            templateCheckonworkCalenderCountList.forEach(i -> {
                System.out.println(i.toString());
            });
            fileName = "考勤统计";
            ExcelUtil util = new ExcelUtil(CcccCheckonworkCardCount.class);
            result = util.downLoadExcel(fileName, env.getProperty("checkonwork.template.count", String.class), param);
        } catch (Exception e) {
            throw new ServiceException("excel export error");
        }
        return result;
    }

工具类

package com.cccc.common.utils.poi;

import java.io.*;
import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import java.util.stream.Collectors;

import com.cccc.common.annotation.Excel;
import com.cccc.common.annotation.Excels;
import com.cccc.common.config.RuoYiConfig;
import com.cccc.common.core.domain.AjaxResult;
import com.cccc.common.core.text.Convert;
import com.cccc.common.exception.CustomException;
import com.cccc.common.utils.DictUtils;
import com.cccc.common.utils.StringUtils;
import com.cccc.common.utils.reflect.ReflectUtils;
import net.sf.jxls.transformer.XLSTransformer;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.ss.usermodel.BorderStyle;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.DataValidation;
import org.apache.poi.ss.usermodel.DataValidationConstraint;
import org.apache.poi.ss.usermodel.DataValidationHelper;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.FillPatternType;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.ss.util.CellRangeAddressList;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFDataValidation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.cccc.common.utils.DateUtils;

import javax.servlet.http.HttpServletResponse;

/**
 * Excel相关处理
 * 
 * @author ruoyi
 */
public class ExcelUtil<T>
{
    private static final Logger log = LoggerFactory.getLogger(ExcelUtil.class);

    /**
     * Excel sheet最大行数，默认65536
     */
    public static final int sheetSize = 65536;

    /**
     * 工作表名称
     */
    private String sheetName;

    /**
     * 导出类型（EXPORT:导出数据；IMPORT：导入模板）
     */
    private Excel.Type type;

    /**
     * 工作薄对象
     */
    private Workbook wb;

    /**
     * 工作表对象
     */
    private Sheet sheet;

    /**
     * 样式列表
     */
    private Map<String, CellStyle> styles;

    /**
     * 导入导出数据列表
     */
    private List<T> list;

    /**
     * 注解列表
     */
    private List<Object[]> fields;

    /**
     * 统计列表
     */
    private Map<Integer, Double> statistics = new HashMap<Integer, Double>();

    /**
     * 数字格式
     */
    private static final DecimalFormat DOUBLE_FORMAT = new DecimalFormat("######0.00");

    /**
     * 实体对象
     */
    public Class<T> clazz;

    public ExcelUtil(Class<T> clazz)
    {
        this.clazz = clazz;
    }

    public void init(List<T> list, String sheetName, Excel.Type type)
    {
        if (list == null)
        {
            list = new ArrayList<T>();
        }
        this.list = list;
        this.sheetName = sheetName;
        this.type = type;
        createExcelField();
        createWorkbook();
    }

    /**
     * 对excel表单默认第一个索引名转换成list
     * 
     * @param is 输入流
     * @return 转换后集合
     */
    public List<T> importExcel(InputStream is) throws Exception
    {
        return importExcel(StringUtils.EMPTY, is);
    }

    /**
     * 对excel表单指定表格索引名转换成list
     * 
     * @param sheetName 表格索引名
     * @param is 输入流
     * @return 转换后集合
     */
    public List<T> importExcel(String sheetName, InputStream is) throws Exception
    {
        this.type = Excel.Type.IMPORT;
        this.wb = WorkbookFactory.create(is);
        List<T> list = new ArrayList<T>();
        Sheet sheet = null;
        if (StringUtils.isNotEmpty(sheetName))
        {
            // 如果指定sheet名,则取指定sheet中的内容.
            sheet = wb.getSheet(sheetName);
        }
        else
        {
            // 如果传入的sheet名不存在则默认指向第1个sheet.
            sheet = wb.getSheetAt(0);
        }

        if (sheet == null)
        {
            throw new IOException("文件sheet不存在");
        }

        int rows = sheet.getPhysicalNumberOfRows();

        if (rows > 0)
        {
            // 定义一个map用于存放excel列的序号和field.
            Map<String, Integer> cellMap = new HashMap<String, Integer>();
            // 获取表头
            Row heard = sheet.getRow(0);
            for (int i = 0; i < heard.getPhysicalNumberOfCells(); i++)
            {
                Cell cell = heard.getCell(i);
                if (StringUtils.isNotNull(cell))
                {
                    String value = this.getCellValue(heard, i).toString();
                    cellMap.put(value, i);
                }
                else
                {
                    cellMap.put(null, i);
                }
            }
            // 有数据时才处理 得到类的所有field.
            Field[] allFields = clazz.getDeclaredFields();
            // 定义一个map用于存放列的序号和field.
            Map<Integer, Field> fieldsMap = new HashMap<Integer, Field>();
            for (int col = 0; col < allFields.length; col++)
            {
                Field field = allFields[col];
                Excel attr = field.getAnnotation(Excel.class);
                if (attr != null && (attr.type() == Excel.Type.ALL || attr.type() == type))
                {
                    // 设置类的私有字段属性可访问.
                    field.setAccessible(true);
                    Integer column = cellMap.get(attr.name());
                    if (column != null)
                    {
                        fieldsMap.put(column, field);
                    }
                }
            }
            for (int i = 1; i < rows; i++)
            {
                // 从第2行开始取数据,默认第一行是表头.
                Row row = sheet.getRow(i);
                T entity = null;
                for (Map.Entry<Integer, Field> entry : fieldsMap.entrySet())
                {
                    Object val = this.getCellValue(row, entry.getKey());

                    // 如果不存在实例则新建.
                    entity = (entity == null ? clazz.newInstance() : entity);
                    // 从map中得到对应列的field.
                    Field field = fieldsMap.get(entry.getKey());
                    // 取得类型,并根据对象类型设置值.
                    Class<?> fieldType = field.getType();
                    if (String.class == fieldType)
                    {
                        String s = Convert.toStr(val);
                        if (StringUtils.endsWith(s, ".0"))
                        {
                            val = StringUtils.substringBefore(s, ".0");
                        }
                        else
                        {
                            val = Convert.toStr(val);
                        }
                    }
                    else if ((Integer.TYPE == fieldType || Integer.class == fieldType) && StringUtils.isNumeric(Convert.toStr(val)))
                    {
                        val = Convert.toInt(val);
                    }
                    else if (Long.TYPE == fieldType || Long.class == fieldType)
                    {
                        val = Convert.toLong(val);
                    }
                    else if (Double.TYPE == fieldType || Double.class == fieldType)
                    {
                        val = Convert.toDouble(val);
                    }
                    else if (Float.TYPE == fieldType || Float.class == fieldType)
                    {
                        val = Convert.toFloat(val);
                    }
                    else if (BigDecimal.class == fieldType)
                    {
                        val = Convert.toBigDecimal(val);
                    }
                    else if (Date.class == fieldType)
                    {
                        if (val instanceof String)
                        {
                            val = DateUtils.parseDate(val);
                        }
                        else if (val instanceof Double)
                        {
                            val = DateUtil.getJavaDate((Double) val);
                        }
                    }
                    if (StringUtils.isNotNull(fieldType))
                    {
                        Excel attr = field.getAnnotation(Excel.class);
                        String propertyName = field.getName();
                        if (StringUtils.isNotEmpty(attr.targetAttr()))
                        {
                            propertyName = field.getName() + "." + attr.targetAttr();
                        }
                        else if (StringUtils.isNotEmpty(attr.readConverterExp()))
                        {
                            val = reverseByExp(Convert.toStr(val), attr.readConverterExp(), attr.separator());
                        }
                        else if (StringUtils.isNotEmpty(attr.dictType()))
                        {
                            val = reverseDictByExp(Convert.toStr(val), attr.dictType(), attr.separator());
                        }
                        ReflectUtils.invokeSetter(entity, propertyName, val);
                    }
                }
                list.add(entity);
            }
        }
        return list;
    }

    /**
     * 对list数据源将其里面的数据导入到excel表单
     * 
     * @param list 导出数据集合
     * @param sheetName 工作表的名称
     * @return 结果
     */
    public AjaxResult exportExcel(List<T> list, String sheetName)
    {
        this.init(list, sheetName, Excel.Type.EXPORT);
        return exportExcel();
    }

    /**
     * 对list数据源将其里面的数据导入到excel表单
     * 
     * @param sheetName 工作表的名称
     * @return 结果
     */
    public AjaxResult importTemplateExcel(String sheetName)
    {
        this.init(null, sheetName, Excel.Type.IMPORT);
        return exportExcel();
    }

    /**
     * 对list数据源将其里面的数据导入到excel表单
     * 
     * @return 结果
     */
    public AjaxResult exportExcel()
    {
        OutputStream out = null;
        try
        {
            // 取出一共有多少个sheet.
            double sheetNo = Math.ceil(list.size() / sheetSize);
            for (int index = 0; index <= sheetNo; index++)
            {
                createSheet(sheetNo, index);

                // 产生一行
                Row row = sheet.createRow(0);
                int column = 0;
                // 写入各个字段的列头名称
                for (Object[] os : fields)
                {
                    Excel excel = (Excel) os[1];
                    this.createCell(excel, row, column++);
                }
                if (Excel.Type.EXPORT.equals(type))
                {
                    fillExcelData(index, row);
                    addStatisticsRow();
                }
            }
            String filename = encodingFilename(sheetName);
            out = new FileOutputStream(getAbsoluteFile(filename));
            wb.write(out);
            return AjaxResult.success(filename);
        }
        catch (Exception e)
        {
            log.error("导出Excel异常{}", e.getMessage());
            throw new CustomException("导出Excel失败，请联系网站管理员！");
        }
        finally
        {
            if (wb != null)
            {
                try
                {
                    wb.close();
                }
                catch (IOException e1)
                {
                    e1.printStackTrace();
                }
            }
            if (out != null)
            {
                try
                {
                    out.close();
                }
                catch (IOException e1)
                {
                    e1.printStackTrace();
                }
            }
        }
    }

    /**
     * 根据模板导出数据
     * @param sheetName
     * @param sourcePath resource/template文件夹下路径
     * @param beanParams
     * @throws Exception
     */
    public AjaxResult downLoadExcel(String sheetName,String sourcePath, Map<String, Object> beanParams)
    {
        OutputStream out = null;
        try
        {
            //读取模板文件
            InputStream is = new FileInputStream(sourcePath);
            XLSTransformer transformer = new XLSTransformer();
            //填充模板中${}内容
            Workbook workbook = transformer.transformXLS(is, beanParams);
            String filename = encodingFilename(sheetName);
            out = new FileOutputStream(getAbsoluteFile(filename));
            workbook.write(out);
            return AjaxResult.success(filename);
        }
        catch (Exception e)
        {
            log.error("导出Excel异常{}", e.getMessage());
            throw new CustomException("导出Excel失败，请联系网站管理员！");
        }
        finally
        {
            if (wb != null)
            {
                try
                {
                    wb.close();
                }
                catch (IOException e1)
                {
                    e1.printStackTrace();
                }
            }
            if (out != null)
            {
                try
                {
                    out.close();
                }
                catch (IOException e1)
                {
                    e1.printStackTrace();
                }
            }
        }
    }

    /**
     * 填充excel数据
     * 
     * @param index 序号
     * @param row 单元格行
     */
    public void fillExcelData(int index, Row row)
    {
        int startNo = index * sheetSize;
        int endNo = Math.min(startNo + sheetSize, list.size());
        for (int i = startNo; i < endNo; i++)
        {
            row = sheet.createRow(i + 1 - startNo);
            // 得到导出对象.
            T vo = (T) list.get(i);
            int column = 0;
            for (Object[] os : fields)
            {
                Field field = (Field) os[0];
                Excel excel = (Excel) os[1];
                // 设置实体类私有属性可访问
                field.setAccessible(true);
                this.addCell(excel, row, vo, field, column++);
            }
        }
    }

    /**
     * 创建表格样式
     * 
     * @param wb 工作薄对象
     * @return 样式列表
     */
    private Map<String, CellStyle> createStyles(Workbook wb)
    {
        // 写入各条记录,每条记录对应excel表中的一行
        Map<String, CellStyle> styles = new HashMap<String, CellStyle>();
        CellStyle style = wb.createCellStyle();
        style.setAlignment(HorizontalAlignment.CENTER);
        style.setVerticalAlignment(VerticalAlignment.CENTER);
        style.setBorderRight(BorderStyle.THIN);
        style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
        style.setBorderLeft(BorderStyle.THIN);
        style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
        style.setBorderTop(BorderStyle.THIN);
        style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
        style.setBorderBottom(BorderStyle.THIN);
        style.setBottomBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
        Font dataFont = wb.createFont();
        dataFont.setFontName("Arial");
        dataFont.setFontHeightInPoints((short) 10);
        style.setFont(dataFont);
        styles.put("data", style);

        style = wb.createCellStyle();
        style.cloneStyleFrom(styles.get("data"));
        style.setAlignment(HorizontalAlignment.CENTER);
        style.setVerticalAlignment(VerticalAlignment.CENTER);
        style.setFillForegroundColor(IndexedColors.GREY_50_PERCENT.getIndex());
        style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        Font headerFont = wb.createFont();
        headerFont.setFontName("Arial");
        headerFont.setFontHeightInPoints((short) 10);
        headerFont.setBold(true);
        headerFont.setColor(IndexedColors.WHITE.getIndex());
        style.setFont(headerFont);
        styles.put("header", style);
        
        style = wb.createCellStyle();
        style.setAlignment(HorizontalAlignment.CENTER);
        style.setVerticalAlignment(VerticalAlignment.CENTER);
        Font totalFont = wb.createFont();
        totalFont.setFontName("Arial");
        totalFont.setFontHeightInPoints((short) 10);
        style.setFont(totalFont);
        styles.put("total", style);

        return styles;
    }

    /**
     * 创建单元格
     */
    public Cell createCell(Excel attr, Row row, int column)
    {
        // 创建列
        Cell cell = row.createCell(column);
        // 写入列信息
        cell.setCellValue(attr.name());
        setDataValidation(attr, row, column);
        cell.setCellStyle(styles.get("header"));
        return cell;
    }

    /**
     * 设置单元格信息
     * 
     * @param value 单元格值
     * @param attr 注解相关
     * @param cell 单元格信息
     */
    public void setCellVo(Object value, Excel attr, Cell cell)
    {
        if (Excel.ColumnType.STRING == attr.cellType())
        {
            cell.setCellType(CellType.STRING);
            cell.setCellValue(StringUtils.isNull(value) ? attr.defaultValue() : value + attr.suffix());
        }
        else if (Excel.ColumnType.NUMERIC == attr.cellType())
        {
            cell.setCellType(CellType.NUMERIC);
            cell.setCellValue(StringUtils.contains(Convert.toStr(value), ".") ? Convert.toDouble(value) : Convert.toInt(value));
        }
    }

    /**
     * 创建表格样式
     */
    public void setDataValidation(Excel attr, Row row, int column)
    {
        if (attr.name().indexOf("注：") >= 0)
        {
            sheet.setColumnWidth(column, 6000);
        }
        else
        {
            // 设置列宽
            sheet.setColumnWidth(column, (int) ((attr.width() + 0.72) * 256));
            row.setHeight((short) (attr.height() * 20));
        }
        // 如果设置了提示信息则鼠标放上去提示.
        if (StringUtils.isNotEmpty(attr.prompt()))
        {
            // 这里默认设了2-101列提示.
            setXSSFPrompt(sheet, "", attr.prompt(), 1, 100, column, column);
        }
        // 如果设置了combo属性则本列只能选择不能输入
        if (attr.combo().length > 0)
        {
            // 这里默认设了2-101列只能选择不能输入.
            setXSSFValidation(sheet, attr.combo(), 1, 100, column, column);
        }
    }

    /**
     * 添加单元格
     */
    public Cell addCell(Excel attr, Row row, T vo, Field field, int column)
    {
        Cell cell = null;
        try
        {
            // 设置行高
            row.setHeight((short) (attr.height() * 20));
            // 根据Excel中设置情况决定是否导出,有些情况需要保持为空,希望用户填写这一列.
            if (attr.isExport())
            {
                // 创建cell
                cell = row.createCell(column);
                cell.setCellStyle(styles.get("data"));

                // 用于读取对象中的属性
                Object value = getTargetValue(vo, field, attr);
                String dateFormat = attr.dateFormat();
                String readConverterExp = attr.readConverterExp();
                String separator = attr.separator();
                String dictType = attr.dictType();
                if (StringUtils.isNotEmpty(dateFormat) && StringUtils.isNotNull(value))
                {
                    cell.setCellValue(DateUtils.parseDateToStr(dateFormat, (Date) value));
                }
                else if (StringUtils.isNotEmpty(readConverterExp) && StringUtils.isNotNull(value))
                {
                    cell.setCellValue(convertByExp(Convert.toStr(value), readConverterExp, separator));
                }
                else if (StringUtils.isNotEmpty(dictType) && StringUtils.isNotNull(value))
                {
                    cell.setCellValue(convertDictByExp(Convert.toStr(value), dictType, separator));
                }
                else if (value instanceof BigDecimal && -1 != attr.scale())
                {
                    cell.setCellValue((((BigDecimal) value).setScale(attr.scale(), attr.roundingMode())).toString());
                }
                else
                {
                    // 设置列类型
                    setCellVo(value, attr, cell);
                }
                addStatisticsData(column, Convert.toStr(value), attr);
            }
        }
        catch (Exception e)
        {
            log.error("导出Excel失败{}", e);
        }
        return cell;
    }

    /**
     * 设置 POI XSSFSheet 单元格提示
     * 
     * @param sheet 表单
     * @param promptTitle 提示标题
     * @param promptContent 提示内容
     * @param firstRow 开始行
     * @param endRow 结束行
     * @param firstCol 开始列
     * @param endCol 结束列
     */
    public void setXSSFPrompt(Sheet sheet, String promptTitle, String promptContent, int firstRow, int endRow,
            int firstCol, int endCol)
    {
        DataValidationHelper helper = sheet.getDataValidationHelper();
        DataValidationConstraint constraint = helper.createCustomConstraint("DD1");
        CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol);
        DataValidation dataValidation = helper.createValidation(constraint, regions);
        dataValidation.createPromptBox(promptTitle, promptContent);
        dataValidation.setShowPromptBox(true);
        sheet.addValidationData(dataValidation);
    }

    /**
     * 设置某些列的值只能输入预制的数据,显示下拉框.
     * 
     * @param sheet 要设置的sheet.
     * @param textlist 下拉框显示的内容
     * @param firstRow 开始行
     * @param endRow 结束行
     * @param firstCol 开始列
     * @param endCol 结束列
     * @return 设置好的sheet.
     */
    public void setXSSFValidation(Sheet sheet, String[] textlist, int firstRow, int endRow, int firstCol, int endCol)
    {
        DataValidationHelper helper = sheet.getDataValidationHelper();
        // 加载下拉列表内容
        DataValidationConstraint constraint = helper.createExplicitListConstraint(textlist);
        // 设置数据有效性加载在哪个单元格上,四个参数分别是：起始行、终止行、起始列、终止列
        CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol);
        // 数据有效性对象
        DataValidation dataValidation = helper.createValidation(constraint, regions);
        // 处理Excel兼容性问题
        if (dataValidation instanceof XSSFDataValidation)
        {
            dataValidation.setSuppressDropDownArrow(true);
            dataValidation.setShowErrorBox(true);
        }
        else
        {
            dataValidation.setSuppressDropDownArrow(false);
        }

        sheet.addValidationData(dataValidation);
    }

    /**
     * 解析导出值 0=男,1=女,2=未知
     * 
     * @param propertyValue 参数值
     * @param converterExp 翻译注解
     * @param separator 分隔符
     * @return 解析后值
     */
    public static String convertByExp(String propertyValue, String converterExp, String separator)
    {
        StringBuilder propertyString = new StringBuilder();
        String[] convertSource = converterExp.split(",");
        for (String item : convertSource)
        {
            String[] itemArray = item.split("=");
            if (StringUtils.containsAny(separator, propertyValue))
            {
                for (String value : propertyValue.split(separator))
                {
                    if (itemArray[0].equals(value))
                    {
                        propertyString.append(itemArray[1] + separator);
                        break;
                    }
                }
            }
            else
            {
                if (itemArray[0].equals(propertyValue))
                {
                    return itemArray[1];
                }
            }
        }
        return StringUtils.stripEnd(propertyString.toString(), separator);
    }

    /**
     * 反向解析值 男=0,女=1,未知=2
     * 
     * @param propertyValue 参数值
     * @param converterExp 翻译注解
     * @param separator 分隔符
     * @return 解析后值
     */
    public static String reverseByExp(String propertyValue, String converterExp, String separator)
    {
        StringBuilder propertyString = new StringBuilder();
        String[] convertSource = converterExp.split(",");
        for (String item : convertSource)
        {
            String[] itemArray = item.split("=");
            if (StringUtils.containsAny(separator, propertyValue))
            {
                for (String value : propertyValue.split(separator))
                {
                    if (itemArray[1].equals(value))
                    {
                        propertyString.append(itemArray[0] + separator);
                        break;
                    }
                }
            }
            else
            {
                if (itemArray[1].equals(propertyValue))
                {
                    return itemArray[0];
                }
            }
        }
        return StringUtils.stripEnd(propertyString.toString(), separator);
    }

    /**
     * 解析字典值
     * 
     * @param dictValue 字典值
     * @param dictType 字典类型
     * @param separator 分隔符
     * @return 字典标签
     */
    public static String convertDictByExp(String dictValue, String dictType, String separator)
    {
        return DictUtils.getDictLabel(dictType, dictValue, separator);
    }

    /**
     * 反向解析值字典值
     * 
     * @param dictLabel 字典标签
     * @param dictType 字典类型
     * @param separator 分隔符
     * @return 字典值
     */
    public static String reverseDictByExp(String dictLabel, String dictType, String separator)
    {
        return DictUtils.getDictValue(dictType, dictLabel, separator);
    }

    /**
     * 合计统计信息
     */
    private void addStatisticsData(Integer index, String text, Excel entity)
    {
        if (entity != null && entity.isStatistics())
        {
            Double temp = 0D;
            if (!statistics.containsKey(index))
            {
                statistics.put(index, temp);
            }
            try
            {
                temp = Double.valueOf(text);
            }
            catch (NumberFormatException e)
            {
            }
            statistics.put(index, statistics.get(index) + temp);
        }
    }

    /**
     * 创建统计行
     */
    public void addStatisticsRow()
    {
        if (statistics.size() > 0)
        {
            Cell cell = null;
            Row row = sheet.createRow(sheet.getLastRowNum() + 1);
            Set<Integer> keys = statistics.keySet();
            cell = row.createCell(0);
            cell.setCellStyle(styles.get("total"));
            cell.setCellValue("合计");

            for (Integer key : keys)
            {
                cell = row.createCell(key);
                cell.setCellStyle(styles.get("total"));
                cell.setCellValue(DOUBLE_FORMAT.format(statistics.get(key)));
            }
            statistics.clear();
        }
    }

    /**
     * 编码文件名
     */
    public String encodingFilename(String filename)
    {
        filename = UUID.randomUUID().toString() + "_" + filename + ".xlsx";
        return filename;
    }

    /**
     * 获取下载路径
     * 
     * @param filename 文件名称
     */
    public String getAbsoluteFile(String filename)
    {
        String downloadPath = RuoYiConfig.getDownloadPath() + filename;
        File desc = new File(downloadPath);
        if (!desc.getParentFile().exists())
        {
            desc.getParentFile().mkdirs();
        }
        return downloadPath;
    }

    /**
     * 获取bean中的属性值
     * 
     * @param vo 实体对象
     * @param field 字段
     * @param excel 注解
     * @return 最终的属性值
     * @throws Exception
     */
    private Object getTargetValue(T vo, Field field, Excel excel) throws Exception
    {
        Object o = field.get(vo);
        if (StringUtils.isNotEmpty(excel.targetAttr()))
        {
            String target = excel.targetAttr();
            if (target.indexOf(".") > -1)
            {
                String[] targets = target.split("[.]");
                for (String name : targets)
                {
                    o = getValue(o, name);
                }
            }
            else
            {
                o = getValue(o, target);
            }
        }
        return o;
    }

    /**
     * 以类的属性的get方法方法形式获取值
     * 
     * @param o
     * @param name
     * @return value
     * @throws Exception
     */
    private Object getValue(Object o, String name) throws Exception
    {
        if (StringUtils.isNotEmpty(name))
        {
            Class<?> clazz = o.getClass();
            Field field = clazz.getDeclaredField(name);
            field.setAccessible(true);
            o = field.get(o);
        }
        return o;
    }

    /**
     * 得到所有定义字段
     */
    private void createExcelField()
    {
        this.fields = new ArrayList<Object[]>();
        List<Field> tempFields = new ArrayList<>();
        tempFields.addAll(Arrays.asList(clazz.getSuperclass().getDeclaredFields()));
        tempFields.addAll(Arrays.asList(clazz.getDeclaredFields()));
        for (Field field : tempFields)
        {
            // 单注解
            if (field.isAnnotationPresent(Excel.class))
            {
                putToField(field, field.getAnnotation(Excel.class));
            }

            // 多注解
            if (field.isAnnotationPresent(Excels.class))
            {
                Excels attrs = field.getAnnotation(Excels.class);
                Excel[] excels = attrs.value();
                for (Excel excel : excels)
                {
                    putToField(field, excel);
                }
            }
        }
        this.fields = this.fields.stream().sorted(Comparator.comparing(objects -> ((Excel) objects[1]).sort())).collect(Collectors.toList());
    }

    /**
     * 放到字段集合中
     */
    private void putToField(Field field, Excel attr)
    {
        if (attr != null && (attr.type() == Excel.Type.ALL || attr.type() == type))
        {
            this.fields.add(new Object[] { field, attr });
        }
    }

    /**
     * 创建一个工作簿
     */
    public void createWorkbook()
    {
        this.wb = new SXSSFWorkbook(500);
    }

    /**
     * 创建工作表
     * 
     * @param sheetNo sheet数量
     * @param index 序号
     */
    public void createSheet(double sheetNo, int index)
    {
        this.sheet = wb.createSheet();
        this.styles = createStyles(wb);
        // 设置工作表的名称.
        if (sheetNo == 0)
        {
            wb.setSheetName(index, sheetName);
        }
        else
        {
            wb.setSheetName(index, sheetName + index);
        }
    }

    /**
     * 获取单元格值
     * 
     * @param row 获取的行
     * @param column 获取单元格列号
     * @return 单元格值
     */
    public Object getCellValue(Row row, int column)
    {
        if (row == null)
        {
            return row;
        }
        Object val = "";
        try
        {
            Cell cell = row.getCell(column);
            if (StringUtils.isNotNull(cell))
            {
                if (cell.getCellTypeEnum() == CellType.NUMERIC || cell.getCellTypeEnum() == CellType.FORMULA)
                {
                    val = cell.getNumericCellValue();
                    if (HSSFDateUtil.isCellDateFormatted(cell))
                    {
                        val = DateUtil.getJavaDate((Double) val); // POI Excel 日期格式转换
                    }
                    else
                    {
                        if ((Double) val % 1 > 0)
                        {
                            val = new BigDecimal(val.toString());
                        }
                        else
                        {
                            val = new DecimalFormat("0").format(val);
                        }
                    }
                }
                else if (cell.getCellTypeEnum() == CellType.STRING)
                {
                    val = cell.getStringCellValue();
                }
                else if (cell.getCellTypeEnum() == CellType.BOOLEAN)
                {
                    val = cell.getBooleanCellValue();
                }
                else if (cell.getCellTypeEnum() == CellType.ERROR)
                {
                    val = cell.getErrorCellValue();
                }

            }
        }
        catch (Exception e)
        {
            return val;
        }
        return val;
    }
}