`

表单基本验证(1)

StrutsJSPApacheXML 
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package com.zchen.struts.action;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {
	private static final long serialVersionUID = 5497987645500599609L;
	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;
	}
	public String execute() throws Exception {
		if("hello".equals(this.getUsername().trim()) && "world".equals(this.getPassword().trim())){
			return "success";
		}else{
			this.addFieldError("username", "username or password error!");
			return "failer";
		}
		
	}

	@Override
	public void validate() {
		if(null == this.getUsername() || "".equals(this.getUsername().trim())){
			this.addFieldError("username", "username required");
		}
		if(null == this.getPassword() || "".equals(this.getPassword().trim())){
			this.addFieldError("password", "password required");
		}
	}

}

 

 

<?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>
	<constant name="struts.devMode" value="true" />
	<package name="login" extends="struts-default" >
		<action name="login" class="com.zchen.struts.action.UserAction">
			<result name="success">/result.jsp</result>
			<result name="input">/login.jsp</result>
			<result name="failer">/login.jsp</result>
		</action>
	</package>
</struts>

 

<body>
	<s:form method="post" action="login.action">
		<s:textfield label="Username" name="username" />
		<s:textfield label="Password" name="password" />
		<s:submit />
	</s:form>
</body>

 

<body>
    username:<%=request.getParameter("username") %><br>
    password:<%=request.getParameter("password") %><br>
  </body>

 

 注：struts先运行validate()方法再加载execute（）方法

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