视频地址：  基于SSH实现员工管理系统之案例实现篇

我的整个完整源码地址 ： 点击进入 github

这是SSH 整合项目的第三章，第一章基于Meavn 整合 Spring 和 Hibernate 框架并进行了进行了自动建表，第二章则在此基础上加入 Struts 2 框架以及完成一个简单的登陆页面。第三章主要侧重于分页查询功能的实现，第四章则着重完善增删改查代码，因为重复性太大，直接将代码粘上来，比较难的会写上注释。

首先写Employee 的增删改查，直接写Action--->Service---->Dao

EmployeeAction.java 中新增的代码

  /**
     * 首先获取到所有的部门，更改员工所在的部门，然后跳转到真正添加员工的jsp
     */
    public String saveUI() {
        //查询部门
        List<Department> list = departmentService.findAll();
       //集合用 set 方法， 对象用 push
        ActionContext.getContext().getValueStack().set("list", list);
        return "saveUI";
    }

    /**
     * 保存员工的 save（）
     */
    public String save() {
        employeeService.save(employee);
        return "saveSuccess";
    }

    /**
     * 更新员工信息的方法
     */
    public String edit() {
        //根据员工ID 查询员工
        employee = employeeService.findById(employee.getEid());
        List<Department> list = departmentService.findAll();
        ActionContext.getContext().getValueStack().set("list", list);
        return "editSuccess";
    }
    public String update() {
        employeeService.update(employee);
        return "updateSuccess";
    }
    /**
     * 删除员工使用的方法
     */
    public String delete(){
        employeeService.delete(employee);
        return "deleteSuccess";
    }

EmployeeService.java(Service 的接口全部代码) 

package com.test.ssh.service;

import com.test.ssh.domain.Employee;
import com.test.ssh.domain.PageBean;

public interface EmployeeService {
    public  Employee login(Employee employee);

    PageBean<Employee> fingByPage(Integer currPage);

    void save(Employee employee);

    Employee findById(int eid);

    void delete(Employee employee);

    void update(Employee employee);
}
EmployeeServiceImpl.java  中新增代码 

    @Override
    public void save(Employee employee) {
        employeeDao.save(employee);
    }

    @Override
    public Employee findById(int eid) {
        return employeeDao.findById(eid);
    }

    @Override
    public void delete(Employee employee) {
        employeeDao.delete(employee);
    }

    @Override
    public void update(Employee employee) {
        employeeDao.update(employee);
    }

此时在/web/frame 下新增一个 editEmployee.jsp 

<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8" %>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="content-type" content="text/html;charset=UTF-8">
    <title></title>
<body>
<table border="0" width="600px">
    <tr>
        <td align="center" style="font-size:24px; color:#666"> 员工修改</td>
    </tr>
    <tr>
        <td align="right">
            <a href="javascript:document.getElementById('saveForm').submit()">保存</a>   
            <a href="javascript:history.go(-1)">退回</a>
        </td>
    </tr>
</table>
<br/>

<s:form action="employee_update" method="post" namespace="/" id="saveForm" theme="simple">
    <s:hidden name="eid" value="%{model.eid}"/>
    <table border='0' cellpadding="0" cellspacing="10">
        <tr>
            <td>姓名：</td>
            <td><s:textfield name="ename" value="%{model.ename}"/></td>
            <td>性别：</td>
            <td><s:radio name="sex" list="{'男','女'}" value="%{model.sex}"/></td>
        </tr>
        <tr>
            <td>出生日期：</td>
            <td><input type="text" name="birthday" value="<s:date name="model.birthday" format="yyyy-MM-dd"/>"/></td>
            <td>入职时间：</td>
            <td><input type="text" name="joinDate" value="<s:date name="model.joinDate" format="yyyy-MM-dd"/>"/></td>
        </tr>
        <tr>
            <td>所属部门：</td>
            <td><s:select name="department.did" list="list" listKey="did" listValue="dname"
                          value="%{model.department.did}" headerKey="" headerValue="-----请--选--择----"/></td>
            <td>编号：</td>
            <td><s:textfield name="eno" value="%{model.eno}"/></td>
        </tr>
        <tr>
            <td>用户名：</td>
            <td><s:textfield name="username" value="%{model.username}"/></td>
            <td>密码：</td>
            <td><s:password name="password" value="%{model.password}" showPassword="true"/></td>
        </tr>
    </table>
</s:form>
</body>
</html>

在同一位置新增一个editDepartment.jsp 

<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8" %>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="content-type" content="text/html;charset=UTF-8">
    <title></title>
</head>
<body>
<table border="0" width="600px">
    <tr>
        <td align="center" style="font-size:24px; color:#666"> 部门编辑</td>
    </tr>
    <tr>
        <td align="right">
            <a href="javascript:document.getElementById('saveForm').submit()">保存</a>   
            <a href="javascript:history.go(-1)">退回 </a>
        </td>
    </tr>
</table>
<br/>
<br>
<s:form id="saveForm" action="department_update.action" method="post" namespace="/" theme="simple">
    <s:hidden name="did" value="%{model.did}"/>
    <table style="font-size::16px">
        <tr>
            <td>部门名称：</td>
            <td><s:textfield name="dname" value="%{model.dname}"/></td>
        </tr>
        <tr>
            <td>部门介绍：</td>
            <td></td>
        </tr>
        <tr>
            <td width="10%"></td>
            <td>
                <s:textarea cols="50" rows="5" name="ddesc" value="%{model.ddesc}"/>"/>
            </td>
        </tr>
    </table>
</s:form>
</body>
</html>

测试发现出现Bug， 

org.springframework.dao.InvalidDataAccessApiUsageException:
 object references an unsaved transient instance - save the transient instance before flushing:
 com.test.ssh.domain.Department; nested exception is org.hibernate.TransientObjectException: object r

查询后更改applicationContext.xml

将

<!--开启注解式事务管理 -->
    <tx:annotation-driven transaction-manager="transactionManager"/>

改为

<tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="search*" read-only="false" />
        </tx:attributes>
    </tx:advice>

然后更改DepartmentAction.java（直接放全部代码） 

package com.test.ssh.action;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.test.ssh.domain.Department;
import com.test.ssh.domain.PageBean;
import com.test.ssh.service.DepartmentService;
import com.test.ssh.service.impl.DepartmentServiceImpl;

public class DepartmentAction extends ActionSupport implements ModelDriven<Department> {

    //模型使用的驱动
    private Department department = new Department();
    private DepartmentService departmentService;

    /**
     * 查询并设置页数的操作
     * 先默认当前页面 currPage = 1
     */
    private Integer currPage = 1;

    public void setCurrPage(Integer currPage) {
        this.currPage = currPage;
    }

    public String findAll() {
        PageBean<Department> pageBean = departmentService.findByPage(currPage);
        //将pageBean 存入到值栈中
        ActionContext.getContext().getValueStack().push(pageBean);
        return "findAll";
    }

    //添加部门
    public String save() {
        departmentService.save(department);
        return "saveSuccess";
    }

    /**
     * 我们在findAll页面里点击了 编辑按钮后，调用edit 方法，
     * 主要是获取想要修改的部门的属性，并展现在网页中，
     * 待用户修改完成后，点击保存，则调用的是 update() 方法进行更新
     */
    //编辑部门的执行的方法
    public String edit() {
        department = departmentService.findById(department.getDid());
        return "editSuccess";
    }

    //修改部门的执行的方法
    public String update() {
        departmentService.update(department);
        return "updateSuccess";
    }

    /**
     * 为了完成级联删除，即删除某一个部门，对应的所有员工都被删除
     * 需要先查询，后删除
     */
    public String delete() {
        department = departmentService.findById(department.getDid());
        departmentService.delete(department);
        return "deleteSuccess";
    }

    public void setDepartment(Department department) {
        this.department = department;
    }

    public void setDepartmentService(DepartmentService departmentService) {
        this.departmentService = departmentService;
    }

    @Override
    public Department getModel() {
        return department;
    }
}
DepartmentServiceImpl.java(接口中的父方法手动补全） 

package com.test.ssh.service.impl;

import com.test.ssh.dao.DepartmentDao;
import com.test.ssh.domain.Department;
import com.test.ssh.domain.Employee;
import com.test.ssh.domain.PageBean;
import com.test.ssh.service.DepartmentService;

import java.util.List;

public class DepartmentServiceImpl implements DepartmentService {

    private DepartmentDao departmentDao;
    public void setDepartmentDao(DepartmentDao departmentDao) {
        this.departmentDao = departmentDao;
    }

    @Override
    public PageBean<Department> findByPage(Integer currPage) {
        PageBean<Department> departmentPageBean = new PageBean<Department>();
        // 封装当前的页数
        departmentPageBean.setCurrPage(currPage);

        //封装每页显示的记录数，默认为3
        int pageSize = 3;
        departmentPageBean.setPageSize(pageSize);

        //封装总记录数,总记录数通过查询数据库获得
        int totalCount = departmentDao.findCount();
        departmentPageBean.setTotalCount(totalCount);

        //封装总页数
        double tc = totalCount;
        Double num = Math.ceil(tc / pageSize);
        departmentPageBean.setTotalPage(num.intValue());
        //封装每页显示的数据
        int begin = (currPage - 1) * pageSize;
        List<Department> list = departmentDao.findByPage(begin, pageSize);
        departmentPageBean.setList(list);
        return departmentPageBean;
    }

    @Override
    public List<Department> findAll() {
        return departmentDao.findAll();
    }

    @Override
    public void save(Department department) {
        departmentDao.save(department);
    }

    @Override
    public void update(Department department) {
        departmentDao.update(department);
    }

    @Override
    public void delete(Department department) {
        departmentDao.delete(department);
    }


    @Override
    public Department findById(int did) {
        return departmentDao.findById(did);
    }
}

DepartmentDaoImpl.java(接口中的父方法手动补全)

package com.test.ssh.dao.impl;

import com.test.ssh.dao.DepartmentDao;
import com.test.ssh.dao.EmployeeDao;
import com.test.ssh.domain.Department;
import com.test.ssh.domain.Employee;
import org.hibernate.criterion.DetachedCriteria;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import java.util.List;


public class DepartmentDaoImpl extends HibernateDaoSupport implements DepartmentDao {


    @Override
    public int findCount() {
        //查询个数
        String hql = "select count(*) from Department ";
        List<Long> list = this.getHibernateTemplate().find(hql);
        //如果个数
        if (list.size() > 0) {
            return list.get(0).intValue();
            //将Long 类型转为 int 类型后返回.
        }
        return 0;
    }

    @Override
    public List<Department> findByPage(int begin, int pageSize) {
        DetachedCriteria criteria = DetachedCriteria.forClass(Department.class);
        List<Department> list = this.getHibernateTemplate().findByCriteria(criteria,begin,pageSize);
        return list;
    }

    @Override
    public List<Department> findAll() {
        //查询到所有语句的 hql 语句。
        List<Department> list = this.getHibernateTemplate().find("from Department ");
        return list;
    }

    @Override
    public void save(Department department) {
        this.getHibernateTemplate().save(department);
    }

    @Override
    public Department findById(int did) {
        return this.getHibernateTemplate().get(Department.class,did);
    }

    @Override
    public void update(Department department) {
        this.getHibernateTemplate().update(department);
    }

    @Override
    public void delete(Department department) {
        this.getHibernateTemplate().delete(department);
    }

}

然后进行对addDepartment.jsp 进行更改。 

<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8" %>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="content-type" content="text/html;charset=UTF-8">
    <title></title>
</head>
<body>
<table border="0" width="600px">
    <tr>
        <td align="center" style="font-size:24px; color:#666"> 部门添加</td>
    </tr>
    <tr>
        <td align="right">
            <a href="javascript:document.getElementById('saveForm').submit()">保存</a>   
            <a href="javascript:history.go(-1)">退回 </a>
        </td>
    </tr>
</table>
<br/>
<br>
<s:form id="saveForm" action="department_save.action" method="post" namespace="/" theme="simple">
    <table style="font-size::16px">
        <tr>
            <td>部门名称：</td>
            <td><s:textfield name="dname"/></td>
        </tr>
        <tr>
            <td>部门介绍：</td>
            <td></td>
        </tr>
        <tr>
            <td width="10%"></td>
            <td>
                <s:textarea cols="50" rows="5" name="ddesc"/>
            </td>
        </tr>
    </table>
</s:form>
</body>
</html>

至此，本项目全部结束。

视频地址：  基于SSH实现员工管理系统之案例实现篇

我的整个完整源码地址 ： 点击进入 github

不清楚的可以留言询问。




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