Spring整合web项目演示

Spring整合web项目演示

 

1 演示问题
（1）action调用service，service调用dao

把ApplicationContext context =
                new ClassPathXmlApplicationContext("bean1.xml"); 把这个代码放在这里，整个项目只会加载一次

1. package cn.itcast.action;

2.  

3. import org.springframework.context.ApplicationContext;

4. import org.springframework.context.support.ClassPathXmlApplicationContext;

5.  

6. import com.opensymphony.xwork2.ActionSupport;

7.  

8. import cn.itcast.service.UserService;

9.  

10. public class UserAction extends ActionSupport {

11.  

12. @Override

13. public String execute() throws Exception {

14. System.out.println("action..........");

15. ApplicationContext context =

16. new ClassPathXmlApplicationContext("bean1.xml");

17. UserService userService = (UserService) context.getBean("userService");

18. userService.add();

19. return NONE;

20. }

21. }

1. package cn.itcast.dao;

2.  

3. public class UserDao {

4.  

5. public void add() {

6. System.out.println("dao..........");

7. }

8. }

1. package cn.itcast.service;

2.  

3. import cn.itcast.dao.UserDao;

4.  

5. public class UserService {

6.  

7. private UserDao userDao;

8. public void setUserDao(UserDao userDao) {

9. this.userDao = userDao;

10. }

11.  

12. public void add() {

13. System.out.println("service..........");

14. userDao.add();

15. }

16. }

 

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:context="http://www.springframework.org/schema/context" xsi:schemaLocation="

5. http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

6. http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

7.  

8. <bean id="userService" class="cn.itcast.service.UserService">

9. <property name="userDao" ref="userDao"></property>

10. </bean>

11. <bean id="userDao" class="cn.itcast.dao.UserDao"></bean>

12. </beans>

 

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. <struts>

6. <package name="demo1" extends="struts-default" namespace="/">

7. <action name="userAction" class="cn.itcast.action.UserAction"></action>

8. </package>

9. </struts>

10.  
11.  
12.  

 

1. <?xml version="1.0" encoding="UTF-8"?>

2. <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">

3. <display-name>spring_day02_webdemo</display-name>

4.  

5. <!-- 指定spring配置文件位置 -->

6. <context-param>

7. <param-name>contextConfigLocation</param-name>

8. <param-value>classpath:bean1.xml</param-value>

9. </context-param>

10.  

11. <filter>

12. <filter-name>struts2</filter-name>

13. <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>

14. </filter>

15.  

16. <filter-mapping>

17. <filter-name>struts2</filter-name>

18. <url-pattern>/*</url-pattern>

19. </filter-mapping>

20.  

21. <!-- 配置监听器 -->

22. <listener>

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

24. </listener>

25.  

26. <welcome-file-list>

27. <welcome-file>index.html</welcome-file>

28. <welcome-file>index.htm</welcome-file>

29. <welcome-file>index.jsp</welcome-file>

30. <welcome-file>default.html</welcome-file>

31. <welcome-file>default.htm</welcome-file>

32. <welcome-file>default.jsp</welcome-file>

33. </welcome-file-list>

34. </web-app>