Struts的ActionForm表单验证

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#struts #string #myeclipse #email #variables #path

本文介绍Struts框架中ActionForm的表单验证方法，通过配置struts-config.xml实现注册表单验证逻辑，包括用户名和密码不能为空等规则。

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Struts的ActionForm表单验证

(2007-05-08 11:41:34)

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struts-config.xml文件
<?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>
<data-sources />
<form-beans >
    <form-bean name="registerForm" type="com.sunxin.struts.form.RegisterForm" />

</form-beans>

<global-exceptions />
<global-forwards />
<action-mappings >
    <action
      attribute="registerForm"
      input="/register.jsp"
      name="registerForm"
      path="/register"
      scope="request"
      type="com.sunxin.struts.action.RegisterAction"
      validate="true">
      <forward name="success" path="/pages/success.jsp" />
      <forward name="failure" path="/pages/failure.jsp" />
    </action>

</action-mappings>

<message-resources parameter="com.sunxin.struts.ApplicationResources" />

</struts-config>

RegisterForm.java
//Created by MyEclipse Struts
// XSL source (default): platform:/plugin/com.genuitec.eclipse.cross.easystruts.eclipse_4.1.1/xslt/JavaClass.xsl

package com.sunxin.struts.form;

import java.io.UnsupportedEncodingException;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.validator.ValidatorForm;

/**
* MyEclipse Struts Creation date: 05-02-2007
*
* XDoclet definition:
*
* @struts.form name="registerForm"
*/
//若继承自ValidatorForm，则validate()方法不要，并且要配置好
//validator-rules.xml文件和validation.xml文件
public class RegisterForm extends {

    // --------------------------------------------------------- Instance
    // Variables

    /** sex property */
    private Byte sex;

    /** password property */
    private String password;

    /** username property */
    private String username;

    /** email property */
    private String email;

    /** pwdAnswer property */
    private String pwdAnswer;

    /** pwdQuestion property */
    private String pwdQuestion;

    // --------------------------------------------------------- Methods

    /**
    * Returns the sex.
    *
    * @return Byte
    */
    public Byte getSex() {
        return sex;
    }

    /**
    * Set the sex.
    *
    * @param sex
    *            The sex to set
    */
    public void setSex(Byte sex) {
        this.sex = sex;
    }

    /**
    * Returns the password.
    *
    * @return String
    */
    public String getPassword() {
        return password;
    }

    /**
    * Set the password.
    *
    * @param password
    *            The password to set
    */
    public void setPassword(String password) {
        this.password = password;
    }

    /**
    * Returns the username.
    *
    * @return String
    */
    public String getUsername() {
        return username;
    }

    /**
    * Set the username.
    *
    * @param username
    *            The username to set
    */
    public void setUsername(String username) {
        this.username = username;
    }

    /**
    * Returns the email.
    *
    * @return String
    */
    public String getEmail() {
        return email;
    }

    /**
    * Set the email.
    *
    * @param email
    *            The email to set
    */
    public void setEmail(String email) {
        this.email = email;
    }

    /**
    * Returns the pwdAnswer.
    *
    * @return String
    */
    public String getPwdAnswer() {
        return pwdAnswer;
    }

    /**
    * Set the pwdAnswer.
    *
    * @param pwdAnswer
    *            The pwdAnswer to set
    */
    public void setPwdAnswer(String pwdAnswer) {
        this.pwdAnswer = pwdAnswer;
    }

    /**
    * Returns the pwdQuestion.
    *
    * @return String
    */
    public String getPwdQuestion() {
        return pwdQuestion;
    }

    /**
    * Set the pwdQuestion.
    *
    * @param pwdQuestion
    *            The pwdQuestion to set
    */
    public void setPwdQuestion(String pwdQuestion) {
        this.pwdQuestion = pwdQuestion;
    }

    /* (non-Javadoc)
    * @see org.apache.struts.action.ActionForm#validate(org.apache.struts.action.ActionMapping, javax.servlet.http.HttpServletRequest)
    */

    public ActionErrors validate(ActionMapping mapping,HttpServletRequest request){
        ActionErrors errors = new ActionErrors();
        if(null==username||"".equals(username)){
            ActionError error1 = new ActionError("error.register.username.notnull");
            //ActionMessage msg1 = new ActionMessage("error.register.username.notnull");
            errors.add("username",error1);
        }
        if(null==password|"".equals(password)){
            ActionError error2 = new ActionError("error.register.password.notnull");
            errors.add("password",error2);
        }
        return errors;

    }

    /*
    * (non-Javadoc)
    *
    * @see org.apache.struts.action.ActionForm#reset(org.apache.struts.action.ActionMapping,
    *      javax.servlet.http.HttpServletRequest)
    */
    public void reset(ActionMapping arg0, HttpServletRequest arg1) {
        // TODO Auto-generated method stub
        // super.reset(arg0, arg1);
//        将请求改为GBK编码，必须在表单被后来的业务逻辑使用之前改过来！否则无效
        try {
            arg1.setCharacterEncoding("GBK");
        } catch (UnsupportedEncodingException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        sex = new Byte("1");
    }

}

RegisterAction.java

//Created by MyEclipse Struts
// XSL source (default): platform:/plugin/com.genuitec.eclipse.cross.easystruts.eclipse_4.1.1/xslt/JavaClass.xsl

package com.sunxin.struts.action;

import java.lang.reflect.InvocationTargetException;
import java.util.Date;

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

import org.apache.commons.beanutils.BeanUtils;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionErrors;
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;
import org.sunxin.struts.lession02.dao.RegUserDAO;
import org.sunxin.struts.lession02.entity.RegUser;
import org.sunxin.struts.lession02.entity.RegUserId;
import org.sunxin.struts.lession02.exception.UsernameExistException;

/**
* MyEclipse Struts Creation date: 05-02-2007
*
* XDoclet definition:
*
* @struts.action path="/register" name="registerForm" input="/register.jsp"
*                scope="request"
* @struts.action-forward name="success" path="/WEB-INF/pages/success.jsp"
* @struts.action-forward name="failure" path="/WEB-INF/pages/failure.jsp"
*/
public class RegisterAction extends Action {

   // --------------------------------------------------------- Instance
   // Variables

   // --------------------------------------------------------- Methods

   /**
   * Method execute
   *
   * @param mapping
   * @param form
   * @param request
   * @param response
   * @return ActionForward
   */
   public ActionForward execute(ActionMapping mapping, ActionForm form,
           HttpServletRequest request, HttpServletResponse response) {
       //为了防止乱码 必须赶在 ActionForm提交之前进行转换
        //在RegisterForm.java的reset()方法对request重新编码
       // RegisterForm registerForm = (RegisterForm) form;
       // TODO Auto-generated method stub
       RegUser user = new RegUser();
       try {
           System.out.println("OK!");
           BeanUtils.copyProperties(user, form);
           user.setRegDate(new Date());
           user.setLastLoginIp(request.getRemoteAddr());
           // user.setLastLoginDate();

           // 插入id(最难搞定)
           String password = request.getParameter("password");
           RegUserId id = new RegUserId();
           id.setId(new Integer(3));
           id.setPassword(password);
           user.setId(id);
           // 执行数据的插入
           RegUserDAO userDAO = new RegUserDAO();
           userDAO.register(user);

           return mapping.findForward("success");

       } catch (IllegalAccessException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (InvocationTargetException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
       //同名用户已经存在，抛出一个异常
       catch (UsernameExistException e) {
           //ActionMessage构造函数的第二个参数是资源文件里面error项的第一个参数{0}
           ActionMessage msg = new ActionMessage("error.register.username.exist",user.getUsername());
           ActionMessages messages = new ActionMessages();
           messages.add("register.username",msg);
           //将错误集合放到request对象中
           try{
               //在这个版本的struts中 saveErrors(),无法传递ActionMessages类参数
               //saveErrors(request,messages);
               saveMessages(request,messages);
           }catch(java.lang.ClassCastException e2){
               e2.printStackTrace();
           }

       }
       return mapping.findForward("failure");
   }

}