简单易懂的spring例子

最新推荐文章于 2025-04-24 16:10:59 发布

最新推荐文章于 2025-04-24 16:10:59 发布 · 100 阅读

文章标签：

#Spring #Bean #Web #XML #JSP

本文介绍了一个使用Java和Spring框架的Web应用程序配置实例，包括了web.xml中Spring监听器的配置、bean.xml中bean的定义以及index.jsp页面如何从Spring容器中获取bean并输出信息。

test.java

package my;
public class test {

private String helloWord = "Hello!World!";

public void setHelloWord(String helloWord) {
this.helloWord = helloWord;
}

public String getHelloWord() {
return helloWord;
}

}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>pro1</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>

<context-param>
<param-name>contextConfigLocation</param-name>

<param-value>
WEB-INF/bean.xml
</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

</web-app>

bean.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="helloBean" class="my.test">
<property name="helloWord">
<value>successful!</value>

</property>
</bean>
</beans>

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@ page import="my.test"%>
<%@page import="org.springframework.beans.factory.BeanFactory"%>
<%@page import="org.springframework.web.context.WebApplicationContext"%><html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
BeanFactory beanFactory = (BeanFactory) pageContext
.getServletContext()
.getAttribute(
WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);
test hello = (test) beanFactory.getBean("helloBean");
out.print(hello.getHelloWord());
%>