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struts2第一个程序

2016-10-28 10:46 323 查看
1.配置struts.xml文件

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

<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
<package name="p1" extends="struts-default">
<action name="hello" class="per.yrj.HelloWorld" method="sayHello">
<result name="success">/success.jsp</result>
</action>
</package>
</struts>


<result name="success">/success.jsp</result>
表示当HelloWorld类下的sayHello方法返回“success”时,跳转到success.jsp。

2.配置核心控制器web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>


3.写per.yrj.HelloWorld类

package per.yrj;

/**
* Created by yirj on 2016/10/28.
* Desc:
*/
public class HelloWorld {

/**
* 必须无参
* public
* 返回值类型为String
* @return
*/
public String sayHello(){
System.out.println("Hello world!");
return "success";
}

}


4.在index.jsp文件中添加一个超链接

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<%-- .action为struts2的默认后缀,不加也没关系 --%>
<a href="${pageContext.request.contextPath}/hello.action">登陆</a>
</body>
</html>
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标签:  struts2.0