SSH_框架整合2—查询显示

Posted 2020-08-09 noaman_wgs

4. 完成功能. 

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

　　

 1 package com.atguigu.ssh.actions;
 2 
 3 import java.util.Map;
 4 
 5 import org.apache.struts2.interceptor.RequestAware;
 6 
 7 import com.atguigu.ssh.service.EmployeeService;
 8 import com.opensymphony.xwork2.ActionSupport;
 9 
10 public class EmployeeAction extends ActionSupport implements RequestAware{
11     /**
12      * 
13      */
14     private static final long serialVersionUID = 1L;
15     
16     private EmployeeService employeeService;
17     
18     public void setEmployeeService(EmployeeService employeeService){
19         this.employeeService=employeeService;
20     }
21     
22     public String list(){
23         request.put("employees", employeeService.getAll()); 
24         return "list";
25     }
26 
27     //放到页面里
28     private Map<String,Object> request;
29     @Override
30     public void setRequest(Map<String, Object> arg0) {
31         this.request=arg0;
32     }
33 
34 }

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

　　

 1 package com.atguigu.ssh.dao;
 2 
 3 import java.util.List;
 4 
 5 import org.hibernate.Session;
 6 import org.hibernate.SessionFactory;
 7 
 8 import com.atguigu.ssh.entities.Employee;
 9 
10 public class EmployeeDao {
11     
12     private SessionFactory sessionFactory;
13     
14     public void setSessionFactory(SessionFactory sessionFactory){
15         this.sessionFactory=sessionFactory;
16     }
17     
18     public Session getSession(){
19         return  this.sessionFactory.getCurrentSession();
20     }
21     
22     public List<Employee> getAll(){
23         String hql="FROM Employee  e LEFT OUTER JOIN FETCH e.department";
24         return getSession().createQuery(hql).list();
25     }
26 }

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

　　

 1 package com.atguigu.ssh.service;
 2 
 3 import java.util.List;
 4 
 5 import com.atguigu.ssh.dao.EmployeeDao;
 6 import com.atguigu.ssh.entities.Employee;
 7 
 8 public class EmployeeService {
 9     
10     private EmployeeDao employeeDao;
11     public void setEmployeeDao(EmployeeDao employeeDao){
12         this.employeeDao=employeeDao;
13     }
14     
15     public List<Employee> getAll(){
16         List<Employee> employees = employeeDao.getAll();
17         return employees;
18     }
19 }

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(2)完善applicationContext-beans.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
 5     
 6     <bean id="employeeDao" class="com.atguigu.ssh.dao.EmployeeDao">
 7         <property name="sessionFactory" ref="sessionFactory"></property>
 8     </bean>
 9     
10     <bean id="employeeService" class="com.atguigu.ssh.service.EmployeeService">
11         <property name="employeeDao" ref="employeeDao"></property>
12     </bean>
13     
14     <bean id="employeeAction" class="com.atguigu.ssh.actions.EmployeeAction"
15           scope="prototype">
16         <property name="employeeService" ref="employeeService"></property>
17     </bean>
18 </beans>

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(3)完善struts.xml

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
 4     "http://struts.apache.org/dtds/struts-2.3.dtd">
 5 
 6 <struts>
 7 
 8     <constant name="struts.enable.DynamicMethodInvocation" value="false" />
 9     <constant name="struts.devMode" value="true" />
10 
11     <package name="default" namespace="/" extends="struts-default">
12         <action name="emp-*" class="employeeAction"
13                 method="{1}">
14                 <result name="list">/WEB-INF/views/emp-list.jsp</result>
15         </action>
16     </package>
17 
18 </struts>

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(4)WebContent下新建index.jsp

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10     <a href="emp-list">显示所有员工信息List All Employees</a>
11 </body>
12 </html>

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(5)WebContent-views-emp-list.jsp

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <%@ taglib prefix="s" uri="/struts-tags" %>   
 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 5 <html>
 6 <head>
 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 8 <title>Insert title here</title>
 9 </head>
10 <body>
11     <h3>Employee List Page</h3>
12     
13     <s:if test="#request.employees == null ||#request.size()==0">
14         没有员工信息
15     </s:if>
16     <s:else>
17         <table border="1" cellpadding="10" cellspacing="0">
18             <tr>
19                 <td>ID</td>
20                 <td>LASTNAME</td>
21                 <td>EMAIL</td>
22                 <td>BIRTH</td>
23                 <td>CREATETIME</td>
24                 <td>DEPT</td>
25             </tr>
26             <s:iterator value="#request.employees">
27                 <tr>
28                     <td>${id}</td>
29                     <td>${lastName}</td>
30                     <td>${email }</td>
31                     <td>${birth}</td>
32                     <td>${createTime}</td>
33                     <td>${department.departmentName}</td>
34                 </tr>
35             </s:iterator>
36         </table>
37     </s:else>
38 </body>
39 </html>

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(6)修改下web.xml中的信息

1 <context-param>
2         <param-name>contextConfigLocation</param-name>
3         <param-value>classpath:applicationContext*.xml</param-value>
4     </context-param>

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SSH_框架整合2;