Struts1.x中的Validator框架应用

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框架 Struts Apache Servlet Bean

要在struts中用validate框架，必须导入相应的jar包。我已经在附件中上传了一个struts的一个空白项目，所有的jar包可以在附件中的struts-blank-1.3.10.war可以把他中lib包中的所有jar包拷贝到自己的项目中。

validate框架是验证表单中添写的信息是否合法，比如用户名不能为空、email的格式是否正确等。类似于JavaScript。

项目的大致轮廓在附件的图片中

下面我将最基本的validate框架实现代码公布如下：

struts-config.xml代码如下：

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
          "http://struts.apache.org/dtds/struts-config_1_3.dtd">

<struts-config>
	<!-- 接收表单数据的ActionForm(FormBean) -->
	<form-beans>
		<form-bean name="loginForm" type="com.struts.forms.LoginForm"></form-bean>
	</form-beans>
	<!-- 用于让index.jsp文件跳转到LoginUI.do -->
	<global-forwards>
		<forward name="loginui" path="/LoginUI.do"></forward>
	</global-forwards>
	
	<action-mappings>
		<!-- 此Action用于跳转到登录页面 -->
		<action path="/LoginUI" 
				type="com.struts.actions.LoginUI">
			<forward name="success" path="/WEB-INF/user/userLogin.jsp"></forward>
		</action>
		<!-- 此Action用于接收并判断用户的信息 -->
		<action path="/Login" 
				name="loginForm"
				input="/WEB-INF/user/userLogin.jsp"
				scope="request"
				type="com.struts.actions.Login">
			<forward name="success" path="/WEB-INF/user/main.jsp"></forward>
		</action>
	</action-mappings>
	<!-- 用于指定国际化的资源文件的所在位置，注意不要加.properties -->
	<message-resources parameter="com.struts.properties.Application">
		
	</message-resources>
	<!-- 把validate框架所用到的两个xml文件加载到项目中 -->
	<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
    	<set-property property="pathnames"
        		value="/org/apache/struts/validator/validator-rules.xml,
               		/WEB-INF/validation.xml"/>
  	</plug-in>

</struts-config>

web.xml文件内容如下：

<?xml version="1.0" encoding="ISO-8859-1"?>

  <!DOCTYPE web-app PUBLIC
	"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
	"http://java.sun.com/dtd/web-app_2_3.dtd">
 
<web-app>
   
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
 </servlet>
  
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>

</web-app>

validate.xml文件内容如下（validate-rules.xml文件用系统默认的就可以）：

<?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>

        <!-- An example form -->
        <form name="loginForm">
            <field
                property="username"
                depends="required">
                    <arg key="loginForm.username"/>
            </field>
            <field
                property="password"
                depends="required,minlength,maxlength">
                	<arg key="loginForm.password" position="0"/>
                	<!-- ${var:minlength}的作用是引用下面定义的变量 -->
                    <arg key="${var:minlength}" name="minlength" 
                    	resource="false" position="1"/>
                    <arg key="${var:maxlength}"  name="maxlength"
                    	resource="false" position="1"/>
                    <var>
                        <var-name>minlength</var-name>
                        <var-value>4</var-value>
                    </var>
                    <var>
                        <var-name>maxlength</var-name>
                        <var-value>7</var-value>
                    </var>
            </field>
        </form>

    </formset>

</form-validation>

userLogin.jsp文件如下：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%
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 'userLogin.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>
	<html:form action="/Login" method="POST">
		<bean:message key="loginForm.username" /><html:text  property="username"></html:text><html:errors property="username" /><br/>
		<bean:message key="loginForm.password" /><html:password property="password"></html:password><html:errors property="password" /><br/>
		<html:submit><bean:message key="loginForm.submit" /></html:submit>
		<html:reset><bean:message key="loginForm.reset" /></html:reset>
	</html:form>
  </body>
</html>

index.jsp文件内容如下：

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

<logic:forward name="loginui"/>

package com.struts.actions;

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;

public class Login extends Action {
	
	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
			
		return null;//mapping.findForward("success") ;
	}
}

LoginUI.java

package com.struts.actions;

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;

public class LoginUI extends Action {

	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
			
		return mapping.findForward("success") ;
	}
	
}

LoginForm.java

package com.struts.forms;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.validator.ValidatorForm;


public class LoginForm extends /*ActionForm*/ValidatorForm {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	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;
	}

	@Override
	public ActionErrors validate(ActionMapping mapping,
			HttpServletRequest request) {
		return super.validate(mapping, request);
	}
	
}

Application_en.properties

errors.required=(en){0} is required.
errors.minlength=(en){0} can not be less than {1} characters.
errors.maxlength=(en){0} can not be greater than {1} characters.

loginForm.username=username
loginForm.password=password
loginForm.submit=submit
loginForm.reset=reset

Application.properties

errors.required={0} is required.
errors.minlength={0} can not be less than {1} characters.
errors.maxlength={0} can not be greater than {1} characters.

loginForm.username=username
loginForm.password=password
loginForm.submit=submit
loginForm.reset=reset

Application_zh_CN.properties

errors.required={0} \u662F\u5FC5\u586B\u9879.
errors.minlength={0} \u4E0D\u80FD\u5C0F\u4E8E {1} \u5B57\u7B26.
errors.maxlength={0} \u4E0D\u80FD\u5927\u4E8E {1} \u5B57\u7B26.

loginForm.username=\u7528\u6237\u540D
loginForm.password=\u5BC6\u7801
loginForm.submit=\u63D0\u4EA4
loginForm.reset=\u91CD\u7F6E

完毕，自己去试试吧。

如果有什么问题可以随时跟我联系，我们可以交流下。