spring在web工程中的运用

1，新建一java web工程：springWebTest.

2，加入spring2.5包（2.5以后版本方能注释注入）

3，新建两个java bean，Room.java和House.java,如下：

package com.bean; public class Room { private String area ; public String getArea() { return area; } public void setArea(String area) { this.area = area; } @Override public String toString() { return "room-room-room"; } }

package com.bean; import org.springframework.beans.factory.annotation.Autowired; public class House { @Autowired private Room room; @Override public String toString() { return "house-house-house"; } public Room getRoom() { return room; } public void setRoom(Room room) { this.room = room; } }

4，修改applicationContext.xml文件，如下：

<?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-2.5.xsd"> <!-- 该 BeanPostProcessor 将自动起作用，对标注 @Autowired 的 Bean 进行自动注入 --> <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/> <bean id="room" class="com.bean.Room"> <property name="area" value="860平方米"/> </bean> <bean id="house" class="com.bean.House"> </bean> </beans>

5，新建SpringLoader.java类，它的init方法对spring工厂进行初始化，Service方法进行测试。

package com.spring; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.bean.House; @SuppressWarnings("serial") public class SpringLoader extends HttpServlet{ private ApplicationContext context ; @Override public void init() throws ServletException { String[] locations = {"applicationContext.xml"}; context = new ClassPathXmlApplicationContext(locations); } @Override protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { House house = (House) context.getBean("house"); System.out.println(house); System.out.println(house.getRoom()); resp.sendRedirect("index.jsp"); } @Override public void destroy() { context = null; } }

6，修改web.xml文件。

<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <servlet> <servlet-name>springLoader</servlet-name> <servlet-class>com.spring.SpringLoader</servlet-class> </servlet> <servlet-mapping> <servlet-name>springLoader</servlet-name> <url-pattern>/tai</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>

7，发布工程到tomcat，通过访问SpringLoader的service方法，即可看到spring的作用。