1:Spring框架和Struts2框架如何整合???
Spring 负责对象创建
Struts2 用Action处理请求
2:Spring与Struts2框架整合的关键点:
让struts2框架action对象的创建,交给Spring完成
3:Spring框架和Struts2框架开发步骤:
(1):引入Struts2框架的相关jar包
(2):引入Spring框架的相关jar包
(3):引入spring-web支持的jar包
spring-web-3.2.5.RELEASE.jar 【去spring的lib里面找即可】 struts2-spring-plugin-2.3.4.1.jar 【去struts2的lib里面找即可】
4:配置XML (1):struts.xml配置 【struts2路径与action映射配置】
易错点:注意action的class属性是直接使用spring的IoC容器里面创建的userAction的名称即可。千万别再使用com....
1 <?xml version="1.0" encoding="UTF-8" ?>
2 <!DOCTYPE struts PUBLIC
3 "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
4 "http://struts.apache.org/dtds/struts-2.0.dtd">
5
6 <struts>
7 <!-- 创建包 -->
8 <package name="struts-spring" extends="struts-default">
9 <action name="user" class="userAction">
10 <result name="success">success.jsp</result>
11 </action>
12
13 </package>
14
15
16 </struts>
(2):applicationContext.xml/bean.xml配置 【spring IoC容器配置】
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 xmlns:p="http://www.springframework.org/schema/p"
5 xmlns:context="http://www.springframework.org/schema/context"
6 xsi:schemaLocation="
7 http://www.springframework.org/schema/beans
8 http://www.springframework.org/schema/beans/spring-beans.xsd
9 http://www.springframework.org/schema/context
10 http://www.springframework.org/schema/context/spring-context.xsd">
11
12
13 <!-- IoC容器的配置,也叫控制反转,要创建的所有的对象都配置在这里 -->
14 <bean id="userDao" class="com.bie.dao.UserDao"></bean>
15
16 </beans>
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 xmlns:p="http://www.springframework.org/schema/p"
5 xmlns:context="http://www.springframework.org/schema/context"
6 xsi:schemaLocation="
7 http://www.springframework.org/schema/beans
8 http://www.springframework.org/schema/beans/spring-beans.xsd
9 http://www.springframework.org/schema/context
10 http://www.springframework.org/schema/context/spring-context.xsd">
11
12
13 <!-- IoC容器的配置,也叫控制反转,要创建的所有的对象都配置在这里 -->
14
15 <bean id="userService" class="com.bie.service.UserService">
16 <property name="userDao" ref="userDao"></property>
17 </bean>
18 </beans>
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 xmlns:p="http://www.springframework.org/schema/p"
5 xmlns:context="http://www.springframework.org/schema/context"
6 xsi:schemaLocation="
7 http://www.springframework.org/schema/beans
8 http://www.springframework.org/schema/beans/spring-beans.xsd
9 http://www.springframework.org/schema/context
10 http://www.springframework.org/schema/context/spring-context.xsd">
11
12
13 <!-- IoC容器的配置,也叫控制反转,要创建的所有的对象都配置在这里 -->
14
15 <bean id="userAction" class="com.bie.action.UserAction">
16 <property name="userService" ref="userService"></property>
17 </bean>
18 </beans>
(3):web.xml配置 【一:核心过滤器,引入struts2功能,二:初始化spring IoC容器】
web.xml的配置真的很重要,也很容易出错:
易错点:初始化spring IoC容器的时候param-value的值一定注意路径,不然一直报404~~~
1 <?xml version="1.0" encoding="UTF-8"?>
2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
3 <display-name>Spring_Struts2_20170313</display-name>
4 <welcome-file-list>
5 <welcome-file>index.html</welcome-file>
6 <welcome-file>index.htm</welcome-file>
7 <welcome-file>index.jsp</welcome-file>
8 <welcome-file>default.html</welcome-file>
9 <welcome-file>default.htm</welcome-file>
10 <welcome-file>default.jsp</welcome-file>
11 </welcome-file-list>
12
13 <!-- web.xml分两部分进行配置 -->
14 <!-- struts2配置 -->
15 <filter>
16 <filter-name>struts2</filter-name>
17 <!-- 如何找到这块,ctrl+shift+t 搜索StrutsPrepareAndExecuteFilter -->
18 <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
19 </filter>
20 <filter-mapping>
21 <filter-name>struts2</filter-name>
22 <url-pattern>/*</url-pattern>
23 </filter-mapping>
24
25 <!-- 1:spring配置 ,在spring-framework-3.2.5.RELEASE\docs\spring-framework-reference\htmlsingle
26 搜索context-param找到下面这段话即可。记得就该param-value的值,如下所示;
27 2:param-value的值最好使用bean,这样方便引用如/WEB-INF/classes/bean-*.xml
28 -->
29 <context-param>
30 <param-name>contextConfigLocation</param-name>
31 <param-value>/WEB-INF/classes/bean-*.xml</param-value>
32 </context-param>
33 <listener>
34 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
35 </listener>
36
37
38 </web-app>
5:配置好配置文件,基本算是完成了开始准备的工作,下面可以进行开发了,这里简单写了一个例子,如下所示:
分别实现了dao层,service层,action层,记住都是使用Spring的IoC容器进行初始化对象的。
1 package com.bie.dao;
2 /**
3 * @author BieHongLi
4 * @version 创建时间:2017年3月13日 下午1:44:27
5 *
6 */
7 public class UserDao {
8
9 public void daoTest(){
10 System.out.println("struts-spring整合的第一个项目");
11 }
12 }
1 package com.bie.service;
2
3 import com.bie.dao.UserDao;
4
5 /**
6 * @author BieHongLi
7 * @version 创建时间:2017年3月13日 下午1:44:37
8 *
9 */
10 public class UserService {
11
12 private UserDao userDao;
13 public void setUserDao(UserDao userDao) {
14 this.userDao = userDao;
15 }
16
17 public void serviceTest(){
18 userDao.daoTest();
19 }
20 }
1 package com.bie.action;
2
3 import com.bie.service.UserService;
4 import com.opensymphony.xwork2.ActionSupport;
5
6 /**
7 * @author BieHongLi
8 * @version 创建时间:2017年3月13日 下午1:43:42
9 *
10 */
11 public class UserAction extends ActionSupport{
12
13
14 private static final long serialVersionUID = 1L;
15 private UserService userService;
16 public void setUserService(UserService userService) {
17 this.userService = userService;
18 }
19
20 @Override
21 public String execute() throws Exception {
22 userService.serviceTest();
23 return SUCCESS;
24 }
25
26 }
6:最后写一个简单的成功页面:
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>struts2-spring第一次整合</title>
8 </head>
9 <body>
10
11 <h1>struts2-spring第一次整合</h1>
12
13 </body>
14 </html>
效果如下所示:
学会拆分,学会整合,开发一定要保持清醒的大脑和逻辑性,加油~~~