Spring WebApplicationContext示例

来源：互联网发布：ce认证检测机构知乎编辑：程序博客网时间：2024/06/07 17:39

JDK1.5.0_22 + Tomcat 6.0.39 + Srping 3.0.0

NameBean：

public class NameBean {public String introduce(){return "Just for test!!!";}}

nameBean.xml：

<?xml version="1.0"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans><bean id="nameBean" class="com.sean.NameBean"/></beans>

OutputBean：

public class OutputBean {private NameBean nameBean;public String output(){return nameBean.introduce();}public void setNameBean(NameBean nameBean) {this.nameBean = nameBean;}}

outputBean.xml：

<?xml version="1.0"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans><bean id="outputBean" class="com.sean.OutputBean"><property name="nameBean"><ref bean="nameBean"/></property></bea

web.xml：

1，如果log4j的配置文件存放在src目录下，则不需要使用log4jConfigLocation参数指定其位置，也不需要配置Log4jConfigListener监听从特定位置加载log4j配置文件

2，特别需要注意的是Log4jConfigListener一定在配在ContextLoaderListener前面

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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">  <display-name>test</display-name><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:outputBean.xml;    classpath:nameBean.xml</param-value></context-param><context-param><param-name>log4jConfigLocation</param-name><param-value>/log4j.properties</param-value></context-param><listener>        <listener-class>org.springframework.web.util.Log4jConfigListener        </listener-class>    </listener><listener>        <listener-class>org.springframework.web.context.ContextLoaderListener        </listener-class>    </listener></web-app>

log4j.properties：

log4j.rootLogger=info,defaultlog4j.appender.default=org.apache.log4j.ConsoleAppenderlog4j.appender.default.layout=org.apache.log4j.PatternLayoutlog4j.appender.default.layout.ConversionPattern=%d{[MM-dd HH:mm:ss]} -> %m%n

test.jsp：

WebApplicationContext对象将作为属性放置在ServletContext中，以便Web应用环境可以访问Spring应用上下文

<%@ page language="java" contentType="text/html; charset=GBK"    pageEncoding="GBK"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><%@page import="org.springframework.web.context.*,com.sean.OutputBean" %> <html><head><meta http-equiv="Content-Type" content="text/html; charset=GBK"><title>Insert title here</title></head><body><% //ServletContext可以获取到WebApplicationContextWebApplicationContext wac = (WebApplicationContext)application.getAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);OutputBean output = (OutputBean)wac.getBean("outputBean");out.write(output.output());//WebApplicationContext也可以获取到ServletContextapplication.setAttribute("Attribute","Attribute");out.write(wac.getServletContext().getAttribute("Attribute").toString());%></body></html>

运行结果如下：

0 0