SSH_框架整合2—查询显示

4. 完成功能.

(1)com.atguigu.ssh.actions包下新建EmployeeAction.java　

 package com.atguigu.ssh.actions;

 import java.util.Map;

 import org.apache.struts2.interceptor.RequestAware;

 import com.atguigu.ssh.service.EmployeeService;

 import com.opensymphony.xwork2.ActionSupport;

 public class EmployeeAction extends ActionSupport implements RequestAware{

     /**

      *

      */

     private static final long serialVersionUID = 1L;

     private EmployeeService employeeService;

     public void setEmployeeService(EmployeeService employeeService){

         this.employeeService=employeeService;

     }

     public String list(){

         request.put("employees", employeeService.getAll());

         return "list";

     }

     //放到页面里

     private Map<String,Object> request;

     @Override

     public void setRequest(Map<String, Object> arg0) {

         this.request=arg0;

     }

 }

　　com.atguigu.ssh.dao包下新建EmployeeDao.java

 package com.atguigu.ssh.dao;

 import java.util.List;

 import org.hibernate.Session;

 import org.hibernate.SessionFactory;

 import com.atguigu.ssh.entities.Employee;

 public class EmployeeDao {

     private SessionFactory sessionFactory;

     public void setSessionFactory(SessionFactory sessionFactory){

         this.sessionFactory=sessionFactory;

     }

     public Session getSession(){

         return  this.sessionFactory.getCurrentSession();

     }

     public List<Employee> getAll(){

         String hql="FROM Employee  e LEFT OUTER JOIN FETCH e.department";

         return getSession().createQuery(hql).list();

     }

 }

　　com.atguigu.ssh.service包下新建EmployeeService.java　

 package com.atguigu.ssh.service;

 import java.util.List;

 import com.atguigu.ssh.dao.EmployeeDao;

 import com.atguigu.ssh.entities.Employee;

 public class EmployeeService {

     private EmployeeDao employeeDao;

     public void setEmployeeDao(EmployeeDao employeeDao){

         this.employeeDao=employeeDao;

     }

     public List<Employee> getAll(){

         List<Employee> employees = employeeDao.getAll();

         return employees;

     }

 }

(2)完善applicationContext-beans.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"

     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

     <bean id="employeeDao" class="com.atguigu.ssh.dao.EmployeeDao">

         <property name="sessionFactory" ref="sessionFactory"></property>

     </bean>

     <bean id="employeeService" class="com.atguigu.ssh.service.EmployeeService">

         <property name="employeeDao" ref="employeeDao"></property>

     </bean>

     <bean id="employeeAction" class="com.atguigu.ssh.actions.EmployeeAction"

           scope="prototype">

         <property name="employeeService" ref="employeeService"></property>

     </bean>

 </beans>

(3)完善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>

     <constant name="struts.enable.DynamicMethodInvocation" value="false" />

     <constant name="struts.devMode" value="true" />

     <package name="default" namespace="/" extends="struts-default">

         <action name="emp-*" class="employeeAction"

                 method="{1}">

                 <result name="list">/WEB-INF/views/emp-list.jsp</result>

         </action>

     </package>

 </struts>

(4)WebContent下新建index.jsp

 <%@ page language="java" contentType="text/html; charset=UTF-8"

     pageEncoding="UTF-8"%>

 <!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>Insert title here</title>

 </head>

 <body>

     <a href="emp-list">显示所有员工信息List All Employees</a>

 </body>

 </html>

(5)WebContent-views-emp-list.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>Insert title here</title>

 </head>

 <body>

     <h3>Employee List Page</h3>

     <s:if test="#request.employees == null ||#request.size()==0">

         没有员工信息

     </s:if>

     <s:else>

         <table border="1" cellpadding="10" cellspacing="0">

             <tr>

                 <td>ID</td>

                 <td>LASTNAME</td>

                 <td>EMAIL</td>

                 <td>BIRTH</td>

                 <td>CREATETIME</td>

                 <td>DEPT</td>

             </tr>

             <s:iterator value="#request.employees">

                 <tr>

                     <td>${id}</td>

                     <td>${lastName}</td>

                     <td>${email }</td>

                     <td>${birth}</td>

                     <td>${createTime}</td>

                     <td>${department.departmentName}</td>

                 </tr>

             </s:iterator>

         </table>

     </s:else>

 </body>

 </html>

(6)修改下web.xml中的信息，注册Struts2

 <?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_2_5.xsd" id="WebApp_ID" version="2.5">

     <!-- 配置spring配置文件.xml的名称和位置路径 -->

     <context-param>

         <param-name>contextConfigLocation</param-name>

         <param-value>classpath:applicationContext*.xml</param-value>

     </context-param>

     <!-- Bootstraps the root web application context before servlet initialization -->

     <listener>

         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

     </listener>

     <!-- 配置Struts的Filter -->

     <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>

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