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~~~