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struts2 表单验证 - action类中的validate()函数

2013-12-23 11:14 399 查看

结构：

loginaction.java

package com;

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

public class loginaction extends ActionSupport {
private String username;

public String getUsername() {
return username;
}

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

private String password;

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

public String execute() throws Exception {
if (username.equalsIgnoreCase("gb") && password.equalsIgnoreCase("1")) {

ActionContext.getContext().getSession().put("name", username);

return "success";
} else {
return "error";
}
}

public void validate() {
if (username == null || username.trim().equals("")) {

addFieldError("username", "姓名不能为空");
}
if (password == null || password.trim().equals("")) {
addFieldError("password", "密码不能为空 ");
}
}
}
struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>

<package name="num1" extends="struts-default">
<action name="login" class="com.loginaction">
<result name="success">/success.jsp</result>
<result name="error">/error.jsp</result>
<result name="input">/index.jsp</result>
</action>
</package>
</struts>
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/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>vvvvv</display-name>

<filter>
<filter-name>struts2</filter-name>
<filter-class> org.apache.struts2.dispatcher.FilterDispatcher </filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@taglib prefix="z" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<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">

</head>
<body>
<z:form action="login" method="post">
<z:textfield name="username" label="用户名" />
<z:password name="password" label="密码"/>
<z:submit value="登录" align="left"/>
</z:form>
</body>
</html>

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