errorcheck.java

一个关于商业的网站

package com.everstar.news;
/**
* ErrorCheck v 1.0
*
* 这个类是用来在客户端生成 JavaScript 代码来校验表单的
* 原是版本是同事 Macro 用 PHP 写的，我感觉十分好用，再也
* 不用再为那些表单区写烦人的 javascript 代码拉，感谢他！
* 这次我用 Java 改写，封装成一个类，并修复了少许的 bug,加
* 多了一条校验的功能,它的扩展性很好，以后可能会继续完善。
*
* Mender :
 * $ Modified Record:
                   $2003.4.6: Created.

 * Copyright (C) 2003 www.studyjava.com All rights reserved.
*
*/

import java.io.*;

public class ErrorCheck    {

/* public: the javascript string */
String errorCheckStr;

/* public: the form name you used */
public String formName;

public void setFormName(String formName) {
   this.formName = formName;
}

/***************************************************************************\
  *        public: constructor functions
  *        构造函数
\***************************************************************************/
public ErrorCheck()    {
   this.errorCheckStr =
     "<script ID=clientEventHandlersJS language=javascript>" + "\n" +
     "<!--" + "\n";
   this.neededFunction();    // load the needed functions
   this.errorCheckStr +=
     "function errorCheck() {" + "\n";
  }

  /***************************************************************************\
   *        public: export javascript script
   *        输出 JAVASCRIPT 脚本
  \***************************************************************************/
  public String ErrorCheckScript()    {
    this.errorCheckStr +=
      "}" + "\n" +
      "-->" + "\n" +
      "</script>" + "\n";
    return this.errorCheckStr;
  }

  /***************************************************************************\
   *        public: check the numeric
   *        检查录入框值是否是数字
  \***************************************************************************/
  public void numericCheck(String inputName, String errorMsg)    {
    this.errorCheckStr +=
      "  if(fucCheckNUM(document."+formName+"."+inputName+".value) == 0) {" + "\n" +
      "    alert(\""+errorMsg+".\");" + "\n" +
      "    document."+formName+"."+inputName+".focus();" + "\n" +
      "    return(false);" + "\n" +
      "  }" + "\n\n";
  }

  /***************************************************************************\
   *        public: check the length
   *        检查录入框值的长度
  \***************************************************************************/
  public void lengthCheck(String inputName, String errorMsg, int MinLength, int MaxLength) {
    this.errorCheckStr +=
      "  if(fucCheckLength(document."+formName+"."+inputName+".value)<"+MinLength+" || " + "\n" +
      "    fucCheckLength(document."+formName+"."+inputName+".value)>"+MaxLength+") {" + "\n" +
      "    alert(\""+errorMsg+".\");" + "\n" +
      "    document."+formName+"."+inputName+".focus();" + "\n" +
      "    return(false);" + "\n" +
      "  }" + "\n\n";
  }

  /***************************************************************************\
   *        public: check the email
   *        检查录入框值是否是正确的EMAIL格式
  \***************************************************************************/
  public void emailCheck(String inputName, String errorMsg)    {
    this.errorCheckStr +=
      "  if(chkemail(document."+formName+"."+inputName+".value) == 0) {" + "\n" +
      "    alert(\""+errorMsg+".\");" + "\n" +
      "    document."+formName+"."+inputName+".focus();" + "\n" +
      "    return(false);" + "\n" +
      "  }" + "\n\n";
  }

  /***************************************************************************\
   *        public: check the telephone number
   *        检查录入框值是否是电话号码
  \***************************************************************************/
  public void telCheck(String inputName, String errorMsg)    {
    this.errorCheckStr +=
      "  if(fucCheckTEL(document."+formName+"."+inputName+".value) == 0) {" + "\n" +
      "    alert(\""+errorMsg+".\");" + "\n" +
      "    document."+formName+"."+inputName+".focus();" + "\n" +
      "    return(false);" + "\n" +
      "  }" + "\n\n";
  }

  /***************************************************************************\
   *        public: check if the input value contian the prefered string
   *        检查录入框值是否是包含给定字串
  \***************************************************************************/
  public void stringCheck(String inputName, String errorMsg, String string)    {
    this.errorCheckStr +=
      "  if(document."+formName+"."+inputName+".value.indexOf(\""+string+"\") != 0) {" + "\n" +
      "    alert(\""+errorMsg+".\");" + "\n" +
      "    document."+formName+"."+inputName+".focus();" + "\n" +
      "    return(false);" + "\n" +
      "  }" + "\n\n";
  }

  /***************************************************************************\
   *        public: check if the input value contain the denyed string
   *        检查录入框值是否是包含给禁止的字串
  \***************************************************************************/
  public void denyStrCheck(String inputName, String errorMsg, String string)    {
    this.errorCheckStr +=
      "  if (document."+formName+"."+inputName+".value.length == 0 || " + "\n" +
      "    document."+formName+"."+inputName+".value.indexOf(\""+string+"\") != -1) {" + "\n" +
      "    alert(\""+errorMsg+".\");" + "\n" +
      "    document."+formName+"."+inputName+".focus();" + "\n" +
      "    return(false);" + "\n" +
      "  }" + "\n\n";
  }

  /***************************************************************************\
   *        public: check the YYYY-MM-DD format date
   *        检查录入框值是否是YYYY-MM-DD的日期格式
  \***************************************************************************/
  public void dateCheck(String inputName, String errorMsg)    {
    this.errorCheckStr +=
      "  if(chkdate(document."+formName+"."+inputName+".value) == 0) {" + "\n" +
      "    alert(\""+errorMsg+".\");" + "\n" +
      "    document."+formName+"."+inputName+".focus();" + "\n" +
      "    return(false);" + "\n" +
      "  }" + "\n\n";
  }


  public void neededFunction()    {
    this.errorCheckStr +=
      "//函数名：fucCheckNUM" + "\n" +
      "//功能介绍：检查是否为数字" + "\n" +
      "//参数说明：要检查的数字" + "\n" +
      "//返回值：1为是数字，0为不是数字" + "\n" +
      "function fucCheckNUM(NUM) {" + "\n" +
      "  var i,j,strTemp;" + "\n" +
      "  strTemp=\"0123456789\";" + "\n" +
      "  if ( NUM.length == 0) return 0;" + "\n" +
      "  for (i=0;i<NUM.length;i++)    {" + "\n" +
      "    j = strTemp.indexOf(NUM.charAt(i));" + "\n" +
      "    if (j==-1) {" + "\n" +
      "      //说明有字符不是数字" + "\n" +
      "      return 0;" + "\n" +
      "    }" + "\n" +
      "  }" + "\n" +
      "  //说明是数字" + "\n" +
      "  return 1;" + "\n" +
      "}" + "\n\n" +

      "//函数名：fucCheckLength" + "\n" +
      "//功能介绍：检查字符串的长度" + "\n" +
      "//参数说明：要检查的字符串" + "\n" +
      "//返回值：长度值" + "\n" +
      "function fucCheckLength(strTemp) {" + "\n" +
      "  var i,sum;" + "\n" +
      "  sum=0;" + "\n" +
      "  for(i=0;i<strTemp.length;i++) {" + "\n" +
      "    if ((strTemp.charCodeAt(i)>=0) && (strTemp.charCodeAt(i)<=255))" + "\n" +
      "      sum=sum+1;" + "\n" +
      "    else" + "\n" +
      "      sum=sum+2;" + "\n" +
      "  }" + "\n" +
      "  return sum;" + "\n" +
      "}" + "\n\n" +

      "//函数名：chkemail" + "\n" +
      "//功能介绍：检查是否为Email Address" + "\n" +
      "//参数说明：要检查的字符串" + "\n" +
      "//返回值：0：不是  1：是" + "\n" +
      "function chkemail(a)    {" + "\n" +
      "  var i=a.length;" + "\n" +
      "  var temp = a.indexOf('@');" + "\n" +
      "  var tempd = a.indexOf('.');" + "\n" +
      "  if (temp > 1) {" + "\n" +
      "    if ((i-temp) > 3) {" + "\n" +
      "      if (tempd!=-1) {" + "\n" +
      "        return 1;" + "\n" +
      "      }" + "\n" +
      "    }" + "\n" +
      "  }" + "\n" +
      "  return 0;" + "\n" +
      "}" + "\n\n" +

      "//函数名：fucCheckTEL" + "\n" +
      "//功能介绍：检查是否为电话号码" + "\n" +
      "//参数说明：要检查的字符串" + "\n" +
      "//返回值：1为是合法，0为不合法" + "\n" +
      "function fucCheckTEL(TEL) {" + "\n" +
      "  var i,j,strTemp;" + "\n" +
      "  strTemp=\"0123456789-()#\";" + "\n" +
      "  if (TEL.length == 0) return 0;" + "\n" +
      "  for (i=0;i<TEL.length;i++) {" + "\n" +
      "    j=strTemp.indexOf(TEL.charAt(i));" + "\n" +
      "    if (j==-1) {" + "\n" +
      "      //说明有字符不合法" + "\n" +
      "      return 0;" + "\n" +
      "    }" + "\n" +
      "  }" + "\n" +
      "  //说明合法" + "\n" +
      "  return 1;" + "\n" +
      "}" + "\n\n" +

      "//函数名：chkdate    (YYYY-MM-DD)" + "\n" +
      "//功能介绍：检查是否为日期" + "\n" +
      "//参数说明：要检查的字符串" + "\n" +
      "//返回值：0：不是日期  1：是日期" + "\n" +
      "function chkdate(datestr) {" + "\n" +
      "  var lthdatestr" + "\n" +
      "  if (datestr != \"\")" + "\n" +
      "    lthdatestr= datestr.length ;" + "\n" +
      "  else" + "\n" +
      "    lthdatestr=0;" + "\n" +
      "  var tmpy=\"\";" + "\n" +
      "  var tmpm=\"\";" + "\n" +
      "  var tmpd=\"\";" + "\n" +
      "  //var datestr;" + "\n" +
      "  var status;" + "\n" +
      "  status=0;" + "\n" +
      "  if ( lthdatestr== 0)" + "\n" +
      "    return 0;" + "\n" +
      "  for (i=0;i<lthdatestr;i++) {" + "\n" +
      "    if (datestr.charAt(i)== '-') {" + "\n" +
      "      status++;" + "\n" +
      "    }" + "\n" +
      "    if (status>2) {" + "\n" +
      "      return 0;" + "\n" +
      "    }" + "\n" +
      "    if ((status==0) && (datestr.charAt(i)!='-')) {" + "\n" +
      "      tmpy=tmpy+datestr.charAt(i)" + "\n" +
      "    }" + "\n" +
      "    if ((status==1) && (datestr.charAt(i)!='-')) {" + "\n" +
      "      tmpm=tmpm+datestr.charAt(i)" + "\n" +
      "    }" + "\n" +
      "    if ((status==2) && (datestr.charAt(i)!='-')) {" + "\n" +
      "      tmpd=tmpd+datestr.charAt(i)" + "\n" +
      "    }" + "\n" +
      "  }" + "\n" +
      "  year=new String (tmpy);" + "\n" +
      "  month=new String (tmpm);" + "\n" +
      "  day=new String (tmpd)" + "\n" +
      "  if ((tmpy.length!=4) || (tmpm.length>2) || (tmpd.length>2)) {" + "\n" +
      "    return 0;" + "\n" +
      "  }" + "\n" +
      "  if (!((1<=month) && (12>=month) && (31>=day) && (1<=day)) ) {" + "\n" +
      "    return 0;" + "\n" +
      "  }" + "\n" +
      "  if (!((year % 4)==0) && (month==2) && (day==29)) {" + "\n" +
      "    return 0;" + "\n" +
      "  }" + "\n" +
      "  if ((month<=7) && ((month % 2)==0) && (day>=31)) {" + "\n" +
      "    return 0;" + "\n" +
      "  }" + "\n" +
      "  if ((month>=8) && ((month % 2)==1) && (day>=31)) {" + "\n" +
      "    return 0;" + "\n" +
      "  }" + "\n" +
      "  if ((month==2) && (day==30)) {" + "\n" +
      "    return 0;" + "\n" +
      "  }" + "\n" +
      "  return 1;" + "\n" +
      "}" + "\n\n";

  }

  /*public static void main(String[] args) {
    ErrorCheck ec = new ErrorCheck("testFrom");
    String script = ec.ErrorCheckScript();
    System.out.println(script);
  } */

}