spring-在web应用中使用spring

一、创建项目
项目名称：spring100806
二、在项目中添加spring 支持
1.在lib目录下添加jar包
commons-logging.jar
junit-4.10.jar
log4j.jar
spring-beans-3.2.0.RELEASE.jar
spring-context-3.2.0.RELEASE.jar
spring-core-3.2.0.RELEASE.jar
spring-expression-3.2.0.RELEASE.jar
spring-web-3.2.0.RELEASE.jar
三、在项目中添加配置文件
1.在项目中创建conf目录
/conf
2.在conf目录添加配置文件
配置文件名称：applicationContext.xml
配置文件内容：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
</beans>
四、在web.xml文件中添加配置信息
<!-- 指定配置文件路径 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>

<!-- 配置监听器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
四、相关bean的创建
1.在src目录下创建bean
包名：cn.jbit.spring100806.domain
类名：Teacher.java
类中内容：
@Component("teacher")
public class Teacher {
public void sayHello(){
System.out.println("hello");
}
}
2.在配置文件中配置注解扫描和注解解析
<!-- 通知spring解析常用的注解 -->
<context:annotation-config/>
<!-- 通知spring应用注解bean所在位置 -->
<context:component-scan base-package="cn.jbit.spring100806.domain"></context:component-scan>
五、测试
在src下创建servlet进行测试
包名：cn.jbit.spring100806.web.servlet
servlet名称：TeacherServlet.java
servlet内容：
public class TeacherServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//1.获取WebApplicationContext
/*
WebApplicationContext webApplicationContext =
(WebApplicationContext) getServletContext().getAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);
*/
//2.获取WebApplicationContext
WebApplicationContext webApplicationContext =
WebApplicationContextUtils.getWebApplicationContext(getServletContext());
Teacher teacher = (Teacher) webApplicationContext.getBean("teacher");
teacher.sayHello();
}

本文出自 “素颜” 博客，请务必保留此出处http://suyanzhu.blog.51cto.com/8050189/1561201