struts2中ActionSupport校验

最新推荐文章于 2022-03-22 19:23:25 发布

原创最新推荐文章于 2022-03-22 19:23:25 发布 · 975 阅读

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本文介绍了一个基于Struts2框架的简单Web应用程序实现，包括web.xml配置、struts.xml配置文件设置、TestAction处理类定义及index.jsp和success.jsp页面展示。通过示例展示了用户输入验证和会话管理的过程。

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web.xml

<?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/j2ee" xmlns:javaee="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/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
	id="WebApp_9" version="2.4">

	<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>
	<!-- 在StrutsPrepareAndExecuteFilter的init()方法中将会读取类路径下默认的配置文件struts.xml完成初始化操作。 
		注意：struts2读取到struts.xml的内容后，以javabean形式存放在内存中，以后struts2对用户的每次请求处理将使用内存中的数据，
		而不是每次都读取struts.xml文件 -->
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
	</welcome-file-list>
</web-app>

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>
    <constant name="struts.enable.DynamicMethodInvocation" value="false" />
    <constant name="struts.devMode" value="false" />
    <package name="default" namespace="/" extends="struts-default">
        <action name="test" class="com.demo.action.TestAction">
            <result type="dispatcher">/success.jsp</result>
            <result name="input">/index.jsp</result>
            
        </action>
    </package>
</struts>

TestAction.java

package com.demo.action;

import java.util.Map;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class TestAction extends ActionSupport{
	private String username;
	
	
	
	public String getUsername() {
		return username;
	}



	public void setUsername(String username) {
		this.username = username;
	}



	public String execute() {

		if (username != null && !username.equals("")) {
			Map session = ActionContext.getContext().getSession();
			session.put("username", getUsername());
			// 根据标志内容导航到操作成功页面
			return "success";
		} else {
			// 根据标志内容导航到操作失败页面
			return "input";
		}
	}
	@Override
	public void validate() {
		// TODO Auto-generated method stub

		if (getUsername() == null || getUsername().trim().equals("")) {
			addFieldError("username", "username can not be null");
			System.out.println("--------");
		} 
	}

}

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'index.jsp' starting page</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>
  
  <body>
    <s:form action="test">
       <s:textfield name="username" label="用户名"> </s:textfield>
       <s:submit label="提交"></s:submit>
    </s:form>
  </body>
</html>

success.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'index.jsp' starting page</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>
  
  <body>
    success <s:property value="username"/> 
  </body>
</html>