2016/10/29 action与form表单的结合使用

1>web.xml

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

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xmlns="http://xmlns.jcp.org/xml/ns/javaee"

    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"

    id="WebApp_ID" version="3.1">

    <display-name>Test</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>

    <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>

2>userAction.java

package com.Test.action;

public class UserAction {

    String info;

    public String getInfo() {

        return info;

    }

    public void setInfo(String info) {

        this.info = info;

    }

    public String find() {

        if (info.endsWith(".vip")) {

            return "vip";

        }

        return "regular";

    }

}

3>struts.xml

<?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>

    <!-- 动态方法调用 -->

    <constant name="struts.enable.DynamicMethodInvocation" value="true" />

    <package name="helloPackage" extends="struts-default">

        <action name="userAction" class="com.Test.action.UserAction" method="find">

            <result name="vip">/vip.jsp</result>

            <result name="regular">/nvip.jsp</result>

        </action>

    </package>

</struts>

4>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">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Insert title here</title>

</head>

<body>

    <form action="userAction">

        <table border="1" width="400px" height="200px">

            <tr>

                <td>请输入用户名：</td>

                <td><input name="info" type="text" /></td>

            </tr>

            <tr>

                <td colspan="2"><input type="submit" name="submit" value="提交" /></td>

            </tr>

        </table>

    </form>

</body>

</html>

5>相关jsp文件

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

    pageEncoding="UTF-8"%>

<%@taglib prefix="s" uri="/struts-tags"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Insert title here</title>

</head>

<body>

    <h1>VIP</h1>

    <s:property value="info" />

</body>

</html>

vip.jsp

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

    pageEncoding="UTF-8"%>

<%@taglib prefix="s" uri="/struts-tags"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Insert title here</title>

</head>

<body>

    <h1>NOT VIP ,HELLOWORLD</h1>

    <s:property value="info" />

</body>

</html>

nvip.jsp

注意：1>在form表单中，action值为struts.xml中的action中的name值,习惯上在后面再写个.action，不写也没关系，

　　　2>在input中，name值要与action.java中的属性名称一致，