SSH（Struts 2.3.31 + Spring 4.1.6 + Hibernate 5.0.12 + Ajax）框架整合实现简单的增删改查（包含分页，Ajax 无刷新验证该用户是否存在）

该文将以员工、部门两表带领大家进入SSH的整合教程：

源码下载：http://download.csdn.net/detail/qq_35318576/9877235

SSH 整合 jar 包下载：http://download.csdn.net/detail/qq_35318576/9874435

1.建立数据库命名为 ssh，建立项目命名为 SSH。（具体命名以实际为准，数据库表将会以 Hibernate 建表语句自动生成）

2.在项目 SSH 中的 lib 目录导入相应的 jar 包，我导入的 jar 包如下：

3.该码农项目目录结构以及显示界面如下（注：com.cqvie.converters 包无用，com.cqvie.util 包属于分页工具，具体使用详见我的下一条博客）：

4.在包 com.cqvie.model 中创建实体类 Employee.java 和 Department.java

package com.cqvie.model;

import java.util.Date;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.ManyToOne;

import org.hibernate.annotations.GenericGenerator;

@Entity
public class Employee {

    private String e_uuid;    //员工的主键 UUID
    private String e_name;    //姓名
    private String e_pwd;    //密码
    private String e_email;    //邮箱
    private Date e_birthday;    //生日
    private Date e_createDate;    //创建日期
    private Department e_department;    //部门
    
    @Id
    @GeneratedValue(generator = "uuid")
    @GenericGenerator(name = "uuid", strategy = "uuid")
    public String getE_uuid() {
        return e_uuid;
    }
    public void setE_uuid(String e_uuid) {
        this.e_uuid = e_uuid;
    }
    public String getE_name() {
        return e_name;
    }
    public void setE_name(String e_name) {
        this.e_name = e_name;
    }
    public String getE_pwd() {
        return e_pwd;
    }
    public void setE_pwd(String e_pwd) {
        this.e_pwd = e_pwd;
    }
    public String getE_email() {
        return e_email;
    }
    public void setE_email(String e_email) {
        this.e_email = e_email;
    }
    public Date getE_birthday() {
        return e_birthday;
    }
    public void setE_birthday(Date e_birthday) {
        this.e_birthday = e_birthday;
    }
    public Date getE_createDate() {
        return e_createDate;
    }
    public void setE_createDate(Date e_createDate) {
        this.e_createDate = e_createDate;
    }
    @ManyToOne
    public Department getE_department() {
        return e_department;
    }
    public void setE_department(Department e_department) {
        this.e_department = e_department;
    }
    
//    @Override
//    public String toString() {
//        return "[e_uuid=" + e_uuid + ",e_name=" + e_name + ",e_pwd" + e_pwd 
//                + ",e_email=" + e_email + ",e_birthday" + e_birthday 
//                + ",e_createDate" + e_createDate + ",e_department" + e_department.getD_uuid() + "]";
//    }
}

package com.cqvie.model;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

import org.hibernate.annotations.GenericGenerator;

@Entity
public class Department {

    private String d_uuid;    //部门的主键 UUID
    private String d_name;    //部门名
    
    @Id
    @GeneratedValue(generator = "uuid")
    @GenericGenerator(name = "uuid", strategy = "uuid")
    public String getD_uuid() {
        return d_uuid;
    }
    public void setD_uuid(String d_uuid) {
        this.d_uuid = d_uuid;
    }
    public String getD_name() {
        return d_name;
    }
    public void setD_name(String d_name) {
        this.d_name = d_name;
    }
}

5.Spring + Hibernate 整合：

配置 jdbc.properties 文件信息连接数据库：

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring
jdbc.username=root
jdbc.password=123

配置 Spring 配置文件 applicationContext.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:context="http://www.springframework.org/schema/context"
     xmlns:aop="http://www.springframework.org/schema/aop"
     xmlns:tx="http://www.springframework.org/schema/tx"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context.xsd
         http://www.springframework.org/schema/aop 
         http://www.springframework.org/schema/aop/spring-aop.xsd
         http://www.springframework.org/schema/tx
         http://www.springframework.org/schema/tx/spring-tx.xsd">
    
    <!-- 向容器注册注解方式 -->     
    <context:annotation-config />
    
    <!-- 自动扫描包 -->
    <context:component-scan base-package="com.cqvie" />
    
    <!-- 导入 .properties 资源配置文件 -->
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations" value="classpath:jdbc.properties" />
    </bean>
    
    <!-- 配置数据源 dataSource -->
    <bean id="dataSource" destroy-method="close" class="org.apache.commons.dbcp2.BasicDataSource">
        <property name="driverClassName" value="${jdbc.driverClassName}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
    </bean>
    
    <!-- 配置 sessionFactory -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 扫描包下面的java文件 -->
        <property name="packagesToScan">
            <list>
                <value>com.cqvie.model</value>
            </list>
        </property>
        <!-- 配置 hibernate.cfg.xml 中的信息 -->
        <property name="hibernateProperties">
            <props>
                  <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                  <prop key="hibernate.show_sql">true</prop>
                  <prop key="hibernate.format_sql">true</prop>
                  <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>
    </bean>
    
    <!-- 配置 Spring 的声明式事务 -->
    <!-- 事务管理器 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
 
     <!-- 注解方式
        <tx:annotation-driven transaction-manager="txManager"/>
     -->
     <!-- XML方式   -->
     <aop:config>
         <aop:pointcut expression="execution(public * com.cqvie.service..*.*(..))" id="bussinessService"/>
         <aop:advisor pointcut-ref="bussinessService" advice-ref="txAdvice"/>
     </aop:config>
     
     <tx:advice id="txAdvice" transaction-manager="txManager">
         <tx:attributes>
             <tx:method name="get*" read-only="true"/>
             <tx:method name="*" propagation="REQUIRED"/>
         </tx:attributes>
     </tx:advice>
     
<!-- ************************************************************************************************ -->
     <!-- Spring 调用 Hibernate 的持久化操作 -->
     <bean id="hibernateTemplate" class="org.springframework.orm.hibernate4.HibernateTemplate">
         <property name="sessionFactory" ref="sessionFactory"></property>
     </bean>

</beans>

配置日志文件 log4j2.xml，防止报错以及打印输出日志信息：

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
    <Appenders>
        <Console name="STDOUT" target="SYSTEM_OUT">
            <PatternLayout pattern="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/>
        </Console>
    </Appenders>
    <Loggers>
        <Logger name="com.opensymphony.xwork2" level="debug"/>
        <Logger name="org.apache.struts2" level="debug"/>
        <Root level="warn">
            <AppenderRef ref="STDOUT"/>
        </Root>
    </Loggers>
</Configuration>

6.在包 com.cqvie.dao 中建立两个 Dao 的实现接口类 DepartmentDao.java 和 EmployeeDao.java：

package com.cqvie.dao;

import java.util.List;

import com.cqvie.model.Department;

public interface DepartmentDao {

    public Department loadByUUID(String uuid);    //根据 UUID 查询该部门信息
    public String selectByName(String name);    //根据部门名称查询该部门信息
    public List<Department> getAllDepartment();    //获得全部部门信息
    
}

package com.cqvie.dao;

import java.util.List;

import com.cqvie.model.Employee;

public interface EmployeeDao {

    public boolean isExists(String username, String password);    //验证用户是否存在
    public void saveOrUpdateEmployee(Employee employee);    //更新或者保存用户
    public List<Employee> getAllEmployee();        //获得所有的用户信息
    public int getEmployeeByName(String name);        //根据员工姓名查询该员工信息
    public void deleteEmployee(Employee employee);        //删除员工信息
    public Employee getEmployee(String uuid);        //根据 UUID 获得该员工的信息
    
    /**   
     * 分页查询   
     * @param currentPage  当前页
     * @param pageSize  每页显示的条数   
     * @return 查询的记录集合   
     */    
    public List<Employee> queryForPage(int currentPage, int pageSize); 
    
}

7.Dao 包中的接口类的实现类 DepartmentDaoImpl.java 和 EmployeeDaoImpl.java：

package com.cqvie.dao.impl;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.orm.hibernate4.HibernateTemplate;
import org.springframework.stereotype.Component;

import com.cqvie.dao.DepartmentDao;
import com.cqvie.model.Department;

@Component("departmentDao")
public class DepartmentDaoImpl implements DepartmentDao {

    private HibernateTemplate hibernateTemplate;
    
    public HibernateTemplate getHibernateTemplate() {
        return hibernateTemplate;
    }
    @Resource
    public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
        this.hibernateTemplate = hibernateTemplate;
    }
    
    /**
     * 根据主键 UUID 查询信息
     */
    @Override
    public Department loadByUUID(String uuid) {
        return this.hibernateTemplate.load(Department.class, uuid);
    }
    
    /**
     * 根据 部门名称 查询信息
     */
    @SuppressWarnings("unchecked")
    @Override
    public String selectByName(String name) {
        String hql = "select d_uuid from Department where d_name=?";
        Object[] parmas = new Object[]{name};
        List<String> list = (List<String>) hibernateTemplate.find(hql, parmas);
        return list.get(0);
    }
    
    /**
     * 获取所有部门
     */
    @SuppressWarnings("unchecked")
    @Override
    public List<Department> getAllDepartment() {
        String hql = "from Department";
        List<Department> departments = (List<Department>) hibernateTemplate.find(hql);
        return departments;
    }

}

package com.cqvie.dao.impl;

import java.util.List;

import javax.annotation.Resource;

import org.hibernate.Session;
import org.springframework.orm.hibernate4.HibernateCallback;
import org.springframework.orm.hibernate4.HibernateTemplate;
import org.springframework.stereotype.Component;

import com.cqvie.dao.EmployeeDao;
import com.cqvie.model.Employee;
import com.cqvie.util.PageHibernateCallback;

@Component("employeeDao")
public class EmployeeDaoImpl implements EmployeeDao {

    private HibernateTemplate hibernateTemplate;
    
    public HibernateTemplate getHibernateTemplate() {
        return hibernateTemplate;
    }
    @Resource
    public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
        this.hibernateTemplate = hibernateTemplate;
    }

    /**
     * 判断该用户是否存在
     */
    @SuppressWarnings("unchecked")
    @Override
    public boolean isExists(String username, String password) {
        String hql = "from Employee where e_name=? and e_pwd=?";
        Object[] params = new Object[]{username, password};
        List<Employee> emp = (List<Employee>) hibernateTemplate.find(hql, params);
        if(emp != null && emp.size() > 0)
            return true;
        return false;
    }
    
    /**
     * 保存一个用户
     */
    @Override
    public void saveOrUpdateEmployee(Employee employee) {
        //this.hibernateTemplate.saveOrUpdate(employee);
        Session session = hibernateTemplate.getSessionFactory().openSession();
        session.saveOrUpdate(employee);
        session.flush();
        session.refresh(employee); 
    }
    
    /**
     * 获得全部用户
     */
    @SuppressWarnings("unchecked")
    @Override
    public List<Employee> getAllEmployee() {
        String hql = "from Employee";
        List<Employee> employees = (List<Employee>) hibernateTemplate.find(hql);
        return employees;
    }
    
    /**
     * 根据员工姓名查询该员工信息
     */
    @SuppressWarnings("unchecked")
    @Override
    public int getEmployeeByName(String name) {
        String hql = "select e_uuid from Employee where e_name=?";
        Object[] parmas = new Object[]{name};
        List<String> list = (List<String>) hibernateTemplate.find(hql, parmas);
        return list.size();
    }
    
    /**
     * 删除员工信息
     */
    @Override
    public void deleteEmployee(Employee employee) {
        hibernateTemplate.delete(employee);
    }
    
    /**
     * 根据 UUID 获得该员工的信息
     */
    @Override
    public Employee getEmployee(String uuid) {
        return hibernateTemplate.get(Employee.class, uuid);
    }
    
    /**
     * 分页查询
     */
    @SuppressWarnings({ "unchecked", "rawtypes" })
    @Override
    public List<Employee> queryForPage(int currentPage, int pageSize) {
        String hql = "from Employee";
        List<Employee> list = (List<Employee>) this.hibernateTemplate.execute( (HibernateCallback<Employee>) new PageHibernateCallback(hql, new Object[] {}, currentPage, pageSize));
        if(list != null && list.size() > 0) {
            return list;
        }
        return null;
    }
    

}

8.在包 com.cqvie.service 中建立两个 Service 的实现接口类 DepartmentService.java 和 EmployeeService.java：

package com.cqvie.service;

import java.util.List;

import com.cqvie.model.Department;

public interface DepartmentService {

    public Department loadByUUID(String uuid);    //根据 UUID 查询该部门信息
    public String selectByName(String name);    //根据部门名称查询该部门信息
    public List<Department> getAllDepartment();    //获得全部部门信息
    
}

package com.cqvie.service;

import java.util.List;

import com.cqvie.model.Employee;
import com.cqvie.util.PageBean;

public interface EmployeeService {

    public boolean isExists(Employee employee);    //验证用户是否存在
    public void saveOrUpdateEmployee(Employee employee);    //更新或者保存用户
    public List<Employee> getAllEmployee();    //获得所有的用户信息
    public boolean getEmployeeByName(String name);    //根据员工姓名查询该员工信息
    public void deleteEmployee(Employee employee);    //删除员工信息
    public Employee getEmployee(String uuid);    //根据 UUID 获得该员工的信息
    
    public PageBean queryForPage(int pageSize,int currentPage);    //分页显示数据
}

9.Service 包中的接口类的实现类 DepartmentServiceImpl.java 和 EmployeeServiceImpl.java：

package com.cqvie.service.impl;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.stereotype.Component;

import com.cqvie.dao.DepartmentDao;
import com.cqvie.model.Department;
import com.cqvie.service.DepartmentService;

@Component("departmentService")
public class DepartmentServiceImpl implements DepartmentService {

    private DepartmentDao departmentDao;

    public DepartmentDao getDepartmentDao() {
        return departmentDao;
    }
    @Resource
    public void setDepartmentDao(DepartmentDao departmentDao) {
        this.departmentDao = departmentDao;
    }
    
    /**
     * 根据 UUID 查询该部门信息
     */
    @Override
    public Department loadByUUID(String uuid) {
        return this.departmentDao.loadByUUID(uuid);
    }
    
    /**
     * 根据部门名称查询该部门信息
     */
    @Override
    public String selectByName(String name) {
        return this.departmentDao.selectByName(name);
    }
    
    /**
     * 获得全部部门信息
     */
    @Override
    public List<Department> getAllDepartment() {
        return this.departmentDao.getAllDepartment();
    }
    
}

package com.cqvie.service.impl;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.stereotype.Component;

import com.cqvie.dao.EmployeeDao;
import com.cqvie.model.Employee;
import com.cqvie.service.EmployeeService;
import com.cqvie.util.PageBean;

@Component("employeeService")
public class EmployeeServiceImpl implements EmployeeService {

    private EmployeeDao employeeDao;
    
    public EmployeeDao getEmployeeDao() {
        return employeeDao;
    }
    @Resource
    public void setEmployeeDao(EmployeeDao employeeDao) {
        this.employeeDao = employeeDao;
    }

    /**
     * 验证用户是否存在
     */
    @Override
    public boolean isExists(Employee employee) {
        boolean result = employeeDao.isExists(employee.getE_name(), employee.getE_pwd());
        return result;
    }
    
    /**
     * 更新或者保存用户
     */
    @Override
    public void saveOrUpdateEmployee(Employee employee) {
        employeeDao.saveOrUpdateEmployee(employee);
    }
    
    /**
     * 获得所有的用户信息
     */
    @Override
    public List<Employee> getAllEmployee() {
        return this.employeeDao.getAllEmployee();
    }
    
    /**
     * 根据员工姓名查询该员工信息
     */
    @Override
    public boolean getEmployeeByName(String name) {
        return this.employeeDao.getEmployeeByName(name) > 0;
    }
    
    /**
     * 删除员工信息
     */
    @Override
    public void deleteEmployee(Employee employee) {
        employeeDao.deleteEmployee(employee);
    }
    
    /**
     * 根据 UUID 获得该员工的信息
     */
    @Override
    public Employee getEmployee(String uuid) {
        return employeeDao.getEmployee(uuid);
    }
    
    /**
     * 分页查询
     */
    @Override
    public PageBean queryForPage(int pageSize, int page) {
        
        int allRow = employeeDao.getAllEmployee().size();//memberDao.getAllRowCount(hql);    //总记录数   
        int totalPage = PageBean.countTotalPage(pageSize, allRow);    //总页数   
        final int offset = PageBean.countOffset(pageSize, page);    //当前页开始记录   
        final int length = pageSize;    //每页记录数   
        final int currentPage = PageBean.countCurrentPage(page);   
        List<Employee> list = employeeDao.queryForPage(offset, length);    //"一页"的记录   

        //把分页信息保存到Bean中   
        PageBean pageBean = new PageBean();   
        pageBean.setPageSize(pageSize);
        pageBean.setCurrentPage(currentPage);   
        pageBean.setAllRow(allRow);   
        pageBean.setTotalPage(totalPage);   
        pageBean.setList(list);   
        pageBean.init(); 
        
        return pageBean;   
    }
    
}

10.搭建 Struts2，配置 Struts2 的 xml 配置文件 struts.xml：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

    <!-- 表示处于开发模式 -->
    <constant name="struts.devMode" value="true" />
    
    <!-- 在 URL 地址中动态指定（动态方法调用DMI） -->
    <constant name="struts.enable.DynamicMethodInvocation" value="true" />
    
    <!-- 解决中文乱码问题 -->
    <constant name="struts.i18n.encoding" value="UTF-8" />
    
     <package name="login" namespace="/" extends="struts-default">
         
         <action name="login" class="loginAction">
             <result name="success" type="redirect">emp-page</result>
             <result name="error">/login.jsp</result>
         </action>
         
         <action name="emp-*" class="employeeAction" method="{1}">
             <result name="list">/index.jsp</result>
             <result name="page">/index_page.jsp</result>
             <result name="input" >/emp-add.jsp</result>
             <result name="success" type="redirect">emp-page</result>
             <result name="delete" type="redirect">emp-page</result>
             <result name="update" >/emp-add.jsp</result>
             <result name="ajax-success" type="stream">
                 <param name="contentType">text/html</param>
                 <param name="inputName">inputStream</param>
             </result>
         </action>
         
     </package>
     
</struts>

11.配置 WEB 项目的配置文件 web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>SSH_Demo</display-name>
  <welcome-file-list>
    <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>
  <!-- 加载 Spring 的配置文件 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  <!-- Spring 防止中文乱码 -->
  <filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <!-- 扩大 Session 的取值范围 -->
  <filter>
    <filter-name>openSessionInView</filter-name>
    <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class>
    <init-param>
      <param-name>sessionFactoryBeanName</param-name>
      <param-value>sessionFactory</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>openSessionInView</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <!-- 加载 Struts2 -->
  <filter>
    <filter-name>struts2</filter-name>
    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

12.功能的实现一，用户登录：

用户登录界面的编写 login.jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!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>用户登录</title>
</head>
<body>
    <form action="login" method="post">
        <h1>用户登录</h1>    <hr>
        <input type="text" name="username" />    <br><br>
        <input type="password" name="password" />    <br><br>
        <input type="submit" value="登录" />
        <input type="reset" value="重置" />
    </form> 
    
    <s:debug></s:debug>
</body>
</html>

Struts2 实现登录验证类 LoginAction.java：

package com.cqvie.action;

import java.util.Map;

import javax.annotation.Resource;

import org.apache.struts2.interceptor.ApplicationAware;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

import com.cqvie.model.Employee;
import com.cqvie.service.EmployeeService;
import com.cqvie.vo.LoginInfo;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

@Component("loginAction")
@Scope("prototype")
public class LoginAction extends ActionSupport implements ModelDriven<LoginInfo>, ApplicationAware {

    private static final long serialVersionUID = 1L;
    
    private Map<String, Object> application;
    private LoginInfo loginInfo = new LoginInfo();
    private EmployeeService employeeService;

    public Map<String, Object> getApplication() {
        return application;
    }
    public void setApplication(Map<String, Object> application) {
        this.application = application;
    }
    public LoginInfo getLoginInfo() {
        return loginInfo;
    }
    public void setLoginInfo(LoginInfo loginInfo) {
        this.loginInfo = loginInfo;
    }
    public EmployeeService getEmployeeService() {
        return employeeService;
    }
    @Resource(name = "employeeService")
    public void setEmployeeService(EmployeeService employeeService) {
        this.employeeService = employeeService;
    }
    
    /**
     * 验证用户是否存在
     */
    @Override
    public String execute() throws Exception {
        Employee employee = new Employee();
        employee.setE_name(loginInfo.getUsername());
        employee.setE_pwd(loginInfo.getPassword());
        boolean result = employeeService.isExists(employee);
        application.put("uname", loginInfo.getUsername());
        System.err.println(result + loginInfo.getUsername());
        if(result)
            return SUCCESS;
        return ERROR;
    }

    @Override
    public LoginInfo getModel() {
        return loginInfo;
    }

}

界面显示如下：

13.其他功能：增删改查，分页查询，判断该用户是否存在，EmployeeAction.java

package com.cqvie.action;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.List;
import java.util.Map;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.interceptor.RequestAware;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

import com.cqvie.model.Department;
import com.cqvie.model.Employee;
import com.cqvie.service.DepartmentService;
import com.cqvie.service.EmployeeService;
import com.cqvie.util.PageBean;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.opensymphony.xwork2.Preparable;

@Component("employeeAction")
@Scope("prototype")
public class EmployeeAction extends ActionSupport implements ModelDriven<Employee>, RequestAware, Preparable {

    private static final long serialVersionUID = 1L;
    
    private int page;
    private PageBean pageBean;
    public int getPage() {
        return page;
    }
    public void setPage(int page) {
        this.page = page;
    }
    public PageBean getPageBean() {
        return pageBean;
    }
    public void setPageBean(PageBean pageBean) {
        this.pageBean = pageBean;
    }

    private Map<String, Object> request;
    private Employee emp = new Employee();
    private EmployeeService employeeService;
    private DepartmentService departmentService;
    private InputStream inputStream;
    
    public Employee getEmp() {
        return emp;
    }
    public void setEmp(Employee emp) {
        this.emp = emp;
    }
    public EmployeeService getEmployeeService() {
        return employeeService;
    }
    @Resource
    public void setEmployeeService(EmployeeService employeeService) {
        this.employeeService = employeeService;
    }
    public DepartmentService getDepartmentService() {
        return departmentService;
    }
    @Resource
    public void setDepartmentService(DepartmentService departmentService) {
        this.departmentService = departmentService;
    }
    public Map<String, Object> getRequest() {
        return request;
    }
    public void setRequest(Map<String, Object> request) {
        this.request = request;
    }
    public InputStream getInputStream() {
        return inputStream;
    }
    public void setInputStream(InputStream inputStream) {
        this.inputStream = inputStream;
    }

    @Override
    public Employee getModel() {
        return emp;
    }
    
    /**
     * 修改用户时获得该 UUID
     */
    ActionContext context = ActionContext.getContext();
    HttpServletRequest req = (HttpServletRequest) context.get(ServletActionContext.HTTP_REQUEST);
    String e_uuid = req.getParameter("e_uuid");
    
    /**
     * 获得所有员工的信息
     * @return
     */
    public String list() {
        List<Employee> employees = employeeService.getAllEmployee();
        request.put("employees", employees);
        return "list";
    }
    
    /**
     * 跳转到修改、增加界面
     */
    public String input() {
        List<Department> departments = departmentService.getAllDepartment();
        request.put("departments", departments);
        return "input";
    }
    /**
     * 修改界面的显示当前信息
     */
    public void prepareInput() {
        System.err.println("*******" + e_uuid + "********");
        if(e_uuid != null) {
            emp = employeeService.getEmployee(e_uuid);
        }
    }
    
    /**
     * 更新或者保存信息
     * @return
     */
    public String save() {
        if(e_uuid == null) {
            emp.setE_createDate(new Date());
        }
        employeeService.saveOrUpdateEmployee(emp);
        return "success";
    }
    public void prepareSave() {
        System.out.println("****************save****************");
        if(e_uuid == null) {
            emp = new Employee();
        } else {
            emp = employeeService.getEmployee(e_uuid);
        }
    }
    
    /**
     * 员工的删除
     * @return
     */
    /*public String delete() {
        employeeService.deleteEmployee(emp);
        return "delete";
    }*/
    
    /**
     * 员工的 Ajax 删除
     * @return
     */
    public String delete() {
        try {
            employeeService.deleteEmployee(emp);
            inputStream = new ByteArrayInputStream("1".getBytes("UTF-8"));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
            try {
                inputStream = new ByteArrayInputStream("0".getBytes("UTF-8"));
            } catch (UnsupportedEncodingException e1) {
                e1.printStackTrace();
            }
        }
        return "ajax-success";
    }
    
    /**
     * 用户的修改
     * @return
     */
    public String update() {
        List<Department> departments = departmentService.getAllDepartment();
        request.put("departments", departments);
        return "update";
    }
    
    /**
     * 检验用户名是否存在
     * @return
     * @throws UnsupportedEncodingException
     */
    public String validateE_name() throws UnsupportedEncodingException {
        System.err.println(employeeService.getEmployeeByName(emp.getE_name()));
        if(employeeService.getEmployeeByName(emp.getE_name())) {
            inputStream = new ByteArrayInputStream("0".getBytes("UTF-8"));
        } else {
            inputStream = new ByteArrayInputStream("1".getBytes("UTF-8"));
        }
        return "ajax-success";
    }
    
    @Override
    public void prepare() throws Exception {}
    
    /**
     * 分页显示数据
     * @return
     */
    public String page() {
        //分页的pageBean,参数pageSize表示每页显示记录数,page为当前页   
        this.pageBean = employeeService.queryForPage(5, page);
        List<Employee> pag = pageBean.getList();
        request.put("employees", pag);
        return "page";
    }
    
}

14.没有分页的显示界面 index.jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!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>首页</title>
        <style type="text/css">
            a { color: blue; }
        </style>
        <script type="text/javascript" src="js/jquery.js"></script>
        <script type="text/javascript">
            $(function() {
                //提示框
                $(".delete").click(function() {
                    var name = $(this).next(":input").val();
                    var flag = confirm("确定要删除  " + name + " 的信息吗？");
                    if(flag) {
                        var $tr = $(this).parent().parent();
                        var url = this.href;// "emp-delete";
                        var args = {};
                        $.post(url, args, function(data) {
                            if(data == "1") {
                                alert("删除成功！");
                                $tr.remove();
                            } else {
                                alert("删除失败！");
                            }
                        });
                    }
                    //取消删除
                    return false;
                });
            });
        </script>
    </head>
<body>
    <h1>Welcome,<s:property value="#application.uname" /></h1>    <hr>
    
    <a href="emp-input">增加用户</a>    <br><br>
    <s:if test="#request.employees == null || #request.employees.size() == 0">没有任何员工的信息！</s:if>
    <s:else>
        <table border="1" cellpadding="5" cellspacing="0">
            <tr>
                <td>UUID</td>
                <td>姓名</td>
                <td>密码</td>
                <td>出生日期</td>
                <td>邮箱</td>
                <td>部门名称</td>
                <td>创建时间</td>
                <td>操作</td>
            </tr>
            <s:iterator value="#request.employees" var="e">
                <tr>
                    <td>${e.e_uuid}</td>
                    <td>${e.e_name}</td>
                    <td>${e.e_pwd}</td>
                    <td>${e.e_birthday}</td>
                    <td>${e.e_email}</td>
                    <td>${e.e_department.d_name}</td>
                    <td>${e.e_createDate}</td>
                    <td>
                        <a href="emp-input?e_uuid=${e.e_uuid }">修改</a>    &nbsp;&nbsp;&nbsp;
                        <a href="emp-delete?e_uuid=${e.e_uuid }" class="delete">删除</a>
                        <input type="hidden" value="${e.e_name}" />
                    </td>
                </tr>
            </s:iterator>
        </table>
    </s:else>
    
    <s:debug></s:debug>
</body>
</html>

有分页的显示页面 index_page.jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!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>首页2</title>
        <style type="text/css">
            a { color: blue; }
        </style>
        <script type="text/javascript" src="js/jquery.js"></script>
        <script type="text/javascript">
            $(function() {
                //提示框
                $(".delete").click(function() {
                    var name = $(this).next(":input").val();
                    var flag = confirm("确定要删除  " + name + " 的信息吗？");
                    if(flag) {
                        var $tr = $(this).parent().parent();
                        var url = this.href;// "emp-delete";
                        var args = {};
                        $.post(url, args, function(data) {
                            if(data == "1") {
                                alert("删除成功！");
                                $tr.remove();
                            } else {
                                alert("删除失败！");
                            }
                        });
                    }
                    //取消删除
                    return false;
                });
            });
        </script>
    </head>
<body>
    <h1>Welcome,<s:property value="#application.uname" /></h1>    <hr>
    
    <a href="emp-input">增加用户</a>    <br><br>
    <s:if test="#request.employees == null || #request.employees.size() == 0">没有任何员工的信息！</s:if>
    <s:else>
        <table border="1" cellpadding="5" cellspacing="0">
            <tr>
                <td>UUID</td>
                <td>姓名</td>
                <td>密码</td>
                <td>出生日期</td>
                <td>邮箱</td>
                <td>部门名称</td>
                <td>创建时间</td>
                <td>操作</td>
            </tr>
            <s:iterator value="#request.employees" var="pag">
                <tr>
                    <td>${pag.e_uuid}</td>
                    <td>${pag.e_name}</td>
                    <td>${pag.e_pwd}</td>
                    <td>${pag.e_birthday}</td>
                    <td>${pag.e_email}</td>
                    <td>${pag.e_department.d_name}</td>
                    <td>${pag.e_createDate}</td>
                    <td>
                        <a href="emp-input?e_uuid=${pag.e_uuid }">修改</a>    &nbsp;&nbsp;&nbsp;
                        <a href="emp-delete?e_uuid=${pag.e_uuid }" class="delete">删除</a>
                        <input type="hidden" value="${pag.e_name}" />
                    </td>
                </tr>
            </s:iterator>
        </table>
    </s:else>
    
　　　　共 <s:property value="pageBean.allRow"/> 条记录   
　　　　共 <s:property value="pageBean.totalPage"/> 页   
　　　　当前第 <s:property value="pageBean.currentPage"/>页<br/>   
　　　　<s:if test="%{pageBean.currentPage == 1}">   
　　　　　　第一页 上一页   
　　　　</s:if>   
　　　　<s:else>   
　　　　　　<a href="emp-page?page=1">首页</a>   
　　　　　　<a href="emp-page?page=<s:property value="%{pageBean.currentPage-1}"/>">上一页</a>   
　　　　</s:else>   
　　　　<s:if test="%{pageBean.currentPage != pageBean.totalPage}">   
　　　　　　<a href="emp-page?page=<s:property value="%{pageBean.currentPage+1}"/>">下一页</a>   
　　　　　　<a href="emp-page?page=<s:property value="pageBean.totalPage"/>">最后一页</a>   
　　　　</s:if>   
　　　　<s:else>   
　　　　　　下一页 最后一页   
　　　　</s:else>  
<s:debug></s:debug>
</body>
</html>

界面显示如下（上图带分页）：

15.增加信息和修改信息的界面，包含检验用户是否已存在的 Ajax 验证：

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!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>增加用户</title>
        <script type="text/javascript" src="js/jquery.js"></script>
        <script type="text/javascript">
            $(function() {
                //检验用户名是否存在
                $(":input[name=e_name]").change(function() {
                    var val = $(this).val();
                    val = $.trim(val);
                    var $this = $(this);
                    
                    if(val != "") {
                        $this.nextAll("font").remove();
                        
                        var url = "emp-validateE_name";
                        var args = {"e_name":val};
                        $.post(url, args, function(data) {
                            if(data == "1") {    //表示可用
                                $this.after("<font color='green'>该姓名可以使用！</font>");
                            } else if(data == "0") {    //表示不可用
                                $this.after("<font color='red'>该姓名已存在！</font>");
                            } else {    //表示服务器错误
                                alert("服务器错误！");
                            }
                        });
                    } else {
                        alert("姓名不能为空！");
                        this.focus();
                    }
                });
            });
        </script>
    </head>
<body>
    <h1>添加用户</h1>    <hr>
    
    <s:form action="emp-save" method="post">
        <s:if test="e_uuid != null">
            <s:textfield name="e_name" label="姓名" disabled="true" />
            <s:hidden name="e_uuid" />
        </s:if>
        <s:else>
            <s:textfield name="e_name" label="姓名" />
        </s:else>
        <s:textfield name="e_pwd" label="密码" />
        <s:textfield name="e_email" label="邮箱" />
        
        <s:textfield name="e_birthday" label="出生日期">
          <s:param name="value"><s:date name="e_birthday" format="yyyy-MM-dd"/></s:param>
        </s:textfield>
        
        <s:select list="#request.departments" listKey="d_uuid" listValue="d_name" name="e_department.d_uuid" label="部门" />
        <s:submit value="添加" />
    </s:form>
    
    <s:debug></s:debug>
</body>
</html>

显示页面如下（右图为修改界面）：

16.至此我们的 SSH 程序已经写完了，欢迎大家转载收藏，欢迎诸多大牛在评论区指教，博主非常感谢您的观看！！！