快乐编程-知识分享-Struts1.x学习-validator-003

目标：struts1.x的四种服务器端验证

对象：适合自学者、初学者、兴趣爱好者。

理念：先行动(Coding)，后理解(Thinking)；在最短的时间内采取最大量的Coding。分享越多，收获越大

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一、第一种验证，在自定义ActionForm类中重写validate方法，核心代码如下：

package com.raky.train.validate1;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;

/**
 * validator by LoginForm
 * 1.> override ActionForm validate method
 * 2.> strutsConfig.xml action config validate="true"
 * 3.> strutsConfig.xml action config input="*.jsp"
 * 4.> jsp page add <html:errors/>
 * 
 * jsp request --> LoginForm validate method --> LoginAction
 * 
 * @author raky
 * @version v1.0
 * 
 */
public class LoginForm extends ActionForm {
	
	private static final long serialVersionUID = 8490608276362181884L;
	
	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;
	}
	
	/** 
	 * Method validate
	 * @param mapping
	 * @param request
	 * @return ActionErrors
	 */
	@Override
	public ActionErrors validate(ActionMapping mapping,	HttpServletRequest request) {
		ActionErrors errors = new ActionErrors();
		if(null == this.username || this.username.equals("")){
			errors.add("username",new ActionMessage("validate.err.username.required","username"));
		}
		if(null == this.password || this.password.equals("")){
			errors.add("password",new ActionMessage("validate.err.password.required","password"));
		}	
		return errors;
	}

	/** 
	 * Method reset
	 * @param mapping
	 * @param request
	 */
	@Override
	public void reset(ActionMapping mapping, HttpServletRequest request) {
		this.username = null;
		this.password = null;
	}
}

 二、第二种验证，在自定义Action类中execute方法中添加验证代码，核心代码如下：

package com.raky.train.validate2;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
/**
 * validator by LoginAction
 * 1.> strutsConfig.xml action config input="*.jsp"
 * 2.> override execute method add validate program
 * 3.> jsp page add <html:errors/>
 * 
 * @author raky
 * @version v1.0
 * 
 */
public class LoginAction extends Action  {
	
	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request,
			HttpServletResponse response) {
		ActionForward forward = null;
		LoginForm loginForm = (LoginForm)form;
		//validate program
		ActionMessages errors = new ActionMessages();
		if(null == loginForm.getUsername() || loginForm.getUsername().equals("")){
			errors.add("username",new ActionMessage("validate.err.username.required","username"));
		}
		if(null == loginForm.getPassword() || loginForm.getPassword().equals("")){
			errors.add("password",new ActionMessage("validate.err.password.required","password"));			
		}		
		if(null != errors && errors.size() > 0){
			this.saveErrors(request, errors);
			return new ActionForward(mapping.getInput());
		}

		if(loginForm.getUsername().equals("admin") && loginForm.getPassword().equals("admin")){
			forward = mapping.findForward("success");
			request.setAttribute("loginForm", loginForm);
		}else{
			forward = mapping.findForward("failure");
		}		
		return forward;
	}	
}

 三、第三种验证，使用ValidatorPlugIn插件（struts1 Validator框架），核心代码如下：

package com.raky.train.validate3;

import org.apache.struts.validator.ValidatorForm;
/**
 * validator by ValidatorPlugIn
 * 1.> strutsConfig.xml config plug-in
 * 2.> strutsConfig.xml action config validate="true"
 * 3.> strutsConfig.xml action config input="*.jsp"
 * 4.> extends ValidatorForm
 * 5.> jsp page add <html:errors/>
 * 
 * @author raky
 * @version v1.0
 * 
 */
public class LoginForm extends ValidatorForm {

	private static final long serialVersionUID = -1162759977230749682L;
	
	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;
	}
}

核心strutsConfig.xml配置如下：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
          "http://struts.apache.org/dtds/struts-config_1_2.dtd">
<struts-config>
	<!-- =================== Form Bean Definitions ==================== -->
	<form-beans>
		<form-bean name="loginForm1" type="com.raky.train.validate1.LoginForm" />
		<form-bean name="loginForm2" type="com.raky.train.validate2.LoginForm" />
		<form-bean name="loginForm3" type="com.raky.train.validate3.LoginForm" />
		<form-bean name="dynaForm4" type="org.apache.struts.validator.DynaValidatorForm">
			<form-property name="username" type="java.lang.String" />
			<form-property name="password" type="java.lang.String" />
		</form-bean>
	</form-beans>
	<!-- ================= Global Forward Definitions ================= -->
	<global-forwards>
		<forward name="success" path="/success.jsp" />
		<forward name="failure" path="/failure.jsp" />
	</global-forwards>
	<!-- =================== Action Definitions ==================== -->
	<action-mappings>
		<action path="/validater1/login" name="loginForm1"
			type="com.raky.train.validate1.LoginAction" input="/validater1/login.jsp"
			validate="true">
		</action>

		<action path="/validater2/login" name="loginForm2"
			type="com.raky.train.validate2.LoginAction" input="/validater2/login.jsp"
			validate="false">
		</action>

		<action path="/validater3/login" name="loginForm3"
			type="com.raky.train.validate3.LoginAction" input="/validater3/login.jsp"
			validate="true">
		</action>
		
		<action path="/validater4/login" name="dynaForm4"
			type="com.raky.train.validate4.LoginAction" input="/validater4/login.jsp"
			validate="true">
		</action>
	</action-mappings>

	<!-- ================ Message Resources Definitions ================ -->
	<message-resources parameter="MessageResources" />

	<!-- ================ Plug Ins Configuration ================ -->
	<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
		<set-property property="stopOnFirstError" value="true" />
		<set-property property="pathnames"
			value="/org/apache/struts/validator/validator-rules.xml,/WEB-INF/validation.xml" />
	</plug-in>
</struts-config>

 验证框架的validation.xml，核心配置如下：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE form-validation PUBLIC
         "-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.3.0//EN"
         "http://jakarta.apache.org/commons/dtds/validator_1_3_0.dtd">

<form-validation>
	<formset>
		<!-- Form for login Validation  -->
		<form name="loginForm3">
			<field property="username" depends="required">
			 	<msg name="required" key="validate.err.username.required" />
				<arg key="view.login.username" />
			</field>
			<field property="password" depends="required,minlength,maxlength">
			    <msg name="required"  key="validate.err.password.required" />
                <msg name="minlength" key="validate.err.password.minlength" />
                <msg name="maxlength" key="validate.err.password.maxlength" />
				<arg key="view.login.password" position="0"/>
				<arg name="minlength" key="${var:minlength}" resource="false"  position="1"/>
				<arg name="maxlength" key="${var:maxlength}" resource="false"  position="2"/>
				<var>
					<var-name>minlength</var-name>
					<var-value>5</var-value>
				</var>
				<var>
					<var-name>maxlength</var-name>
					<var-value>15</var-value>
				</var>
			</field>
		</form>
		<form name="dynaForm4" extends="loginForm3" />
	</formset>
</form-validation>

 四、第四种验证，使用Validator系列Form，（如DynaValidatorForm、LazyValidatorForm）+ ValidatorPlugIn插件（struts1 Validator框架）

/**
 * validator by ***ValidateForm + ValidatorPlugIn 
 * 1.> strutsConfig.xml config plug-in
 * 2.> strutsConfig.xml action config validate="true"
 * 3.> strutsConfig.xml action config input="*.jsp"
 * 4.> strutsConfig.xml form-bean config ***ValidateForm
 * 5.> jsp page add <html:errors/>
 * 
 * @author raky
 * @version v1.0
 * 
 */

 核心配置代码在第三种的strutsConfig.xml + validation.xml 中，在此省略。

以上验证，其中一个页面核心代码，如下：

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<c:set var="ctx" value="${pageContext.request['contextPath']}" />
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Raky train struts1.x - validate2 - Login page</title>
<html:base />
</head>
<body>
<h2>raky - struts1.x - validate2</h2>
<html:form action="/validater2/login" method="post">
<table>
	<tr>
		<td>用     户：</td>
		<td><html:text property="username"  maxlength="40" size="18" /><font color="red"><html:errors property="username" /></font></td>
	</tr>
	<tr>
		<td>密     码：</td>
		<td><html:password property="password"  maxlength="40" size="18" /><font color="red"><html:errors property="password" /></font></td>		
	</tr>
	<tr>
		<td align="center" colspan="2">
			<html:submit property="submitValue" value="确定" />
			<html:reset property="resetValue" value="重置" />
			<html:button property="btnValue" value="返回" onclick="location.href=${ctx}/" />
		</td>	
	</tr>
</table>
</html:form>
</body>
</html>

 总结：本文基本上总结了struts1.x服务器端验证的知识。