struts2表单级验证
?? struts2表单级验证，以最简单的登陆页面的用户名密码为例。
(1)新建login.jsp
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%><%@ taglib uri="/struts-tags" prefix="s"%> <!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=ISO-8859-1"><title>登陆(采用struts2标签)</title></head><body> <s:form action="login" method="post"> <s:textfield name="userName" label="userName" /> <s:textfield name="password" label="password" /> <s:submit label="submit"/> </s:form></body></html>
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注：采用struts2标签，在页面头部加入<%@ taglib uri="/struts-tags" prefix="s"%>?
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(2)loginAction中
package login;import com.opensymphony.xwork2.ActionSupport;public class LoginAction extends ActionSupport{ private String userName = ""; private String password = "";public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}/** * 主方法入口 */public String execute() throws Exception{if(this.userName==null || !"wu".equals(this.userName) || this.password==null || !"1".equals(this.password)){ this.addFieldError("userName", "userName or password error");return "failure";}return "success";}/** * 表单级验证 */public void validate(){if(this.userName==null || "".equals(this.userName)){this.addFieldError("userName", "userName is required");}if(this.password==null || "".equals(this.password)){this.addFieldError("password", "password is required");}} }该类继承了ActionSupport父类。复写其中的validate()方法。
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(3)struts.xml
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <package name="login" extends="struts-default"> <action name="login" >/loginSuccess.jsp</result> <result name="input" >/login.jsp</result> <result name="failure" >/login.jsp</result> </action> </package> </struts>
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