js 学习笔记!

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1.js 编码 不对可能在ie 上出错。






常用正则表达式--------------------------------------------------------------------------------------------

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var rgx=/^[1-9]/d*$/i;//js使用正则表达式
var sFilePath=document.getElementById(obj).value;
if(sFilePath!=""&&sFilePath!=null){
    if(!rgx.test(sFilePath)){
        alert(ziduan+"应为正整数");
        document.getElementById(obj).focus();
        return;
    }
}
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import java.util.regex.*;  
public class FindA{//java使用正则表达式
  public static void main(String args[])  
  throws Exception{  
    String candidate = "A Matcher examines the results of applying a pattern.";  
    String regex = "//ba//w*//b";  
    Pattern p = Pattern.compile(regex);  
    Matcher m = p.matcher(candidate);  
    String val = null;  
    System.out.println("INPUT: " + candidate);  
    System.out.println("REGEX: " + regex +"/r/n");  
    while (m.find()){  
      val = m.group();  
      System.out.println("MATCH: " + val);  
    }  
    if (val == null) {  
      System.out.println("NO MATCHES: ");  
    }  
  }  

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匹配中文字符的正则表达式: [/u4e00-/u9fa5]
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匹配双字节字符(包括汉字在内):[^/x00-/xff]
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匹配空白行的正则表达式:/n/s*/r
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匹配HTML标记的正则表达式:<(/S*?)[^>]*>.*?<//1>|<.*? />
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匹配首尾空白字符的正则表达式:^/s*|/s*$
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匹配Email地址的正则表达式:/w+([-+.]/w+)*@/w+([-.]/w+)*/./w+([-.]/w+)*
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匹配网址URL的正则表达式:[a-zA-z]+://[^/s]*
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匹配帐号是否合法(字母开头,允许5-16字节,允许字母数字下划线):^[a-zA-Z][a-zA-Z0-9_]{4,15}$
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匹配国内电话号码:/d{3}-/d{8}|/d{4}-/d{7}
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匹配腾讯QQ号:[1-9][0-9]{4,}
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匹配中国邮政编码:[1-9]/d{5}(?!/d)
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匹配身份证:/d{15}|/d{18}
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匹配ip地址:/d+/./d+/./d+/./d+
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匹配特定数字:
^[1-9]/d*$    //匹配正整数
^-[1-9]/d*$   //匹配负整数
^-?[1-9]/d*$   //匹配整数
^[1-9]/d*|0$  //匹配非负整数(正整数 + 0)
^-[1-9]/d*|0$   //匹配非正整数(负整数 + 0)
^[1-9]/d*/./d*|0/./d*[1-9]/d*$   //匹配正浮点数
^-([1-9]/d*/./d*|0/./d*[1-9]/d*)$  //匹配负浮点数
^-?([1-9]/d*/./d*|0/./d*[1-9]/d*|0?/.0+|0)$  //匹配浮点数
^[1-9]/d*/./d*|0/./d*[1-9]/d*|0?/.0+|0$   //匹配非负浮点数(正浮点数 + 0)
^(-([1-9]/d*/./d*|0/./d*[1-9]/d*))|0?/.0+|0$  //匹配非正浮点数(负浮点数 + 0)
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匹配特定字符串:
^[A-Za-z]+$  //匹配由26个英文字母组成的字符串
^[A-Z]+$  //匹配由26个英文字母的大写组成的字符串
^[a-z]+$  //匹配由26个英文字母的小写组成的字符串
^[A-Za-z0-9]+$  //匹配由数字和26个英文字母组成的字符串
^/w+$  //匹配由数字、26个英文字母或者下划线组成的字符串
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1。[size=12px]1。^/d+$  //匹配非负整数(正整数 + 0)
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2。^[0-9]*[1-9][0-9]*$  //匹配正整数
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3。^((-/d+)|(0+))$  //匹配非正整数(负整数 + 0)
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4。^-[0-9]*[1-9][0-9]*$  //匹配负整数
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5。^-?/d+$    //匹配整数
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6。^/d+(/./d+)?$  //匹配非负浮点数(正浮点数 + 0)
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7。^(([0-9]+/.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*/.[0-9]+)|([0-9]*[1-9][0-9]*))$  //匹配正浮点数
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8。^((-/d+(/./d+)?)|(0+(/.0+)?))$  //匹配非正浮点数(负浮点数 + 0)
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9。^(-(([0-9]+/.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*/.[0-9]+)|([0-9]*[1-9][0-9]*)))$  //匹配负浮点数
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10。^(-?/d+)(/./d+)?$  //匹配浮点数
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11。^[A-Za-z]+$  //匹配由26个英文字母组成的字符串
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12。^[A-Z]+$  //匹配由26个英文字母的大写组成的字符串
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13。^[a-z]+$  //匹配由26个英文字母的小写组成的字符串
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14。^[A-Za-z0-9]+$  //匹配由数字和26个英文字母组成的字符串
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15。^/w+$  //匹配由数字、26个英文字母或者下划线组成的字符串
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16。^[/w-]+(/.[/w-]+)*@[/w-]+(/.[/w-]+)+$    //匹配email地址
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17。^[a-zA-z]+://匹配(/w+(-/w+)*)(/.(/w+(-/w+)*))*(/?/S*)?$  //匹配url
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18。匹配中文字符的正则表达式: [/u4e00-/u9fa5]
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19。匹配双字节字符(包括汉字在内):[^/x00-/xff]
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20。应用:计算字符串的长度(一个双字节字符长度计2,ASCII字符计1)
String.prototype.len=function(){return this.replace([^/x00-/xff]/g,"aa").length;}
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21。匹配空行的正则表达式:/n[/s| ]*/r
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22。匹配HTML标记的正则表达式:/<(.*)>.*<///1>|<(.*) //>/
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23。匹配首尾空格的正则表达式:(^/s*)|(/s*$)
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  * 1、^/S+[a-z A-Z]$ 不能为空 不能有空格  只能是英文字母
  ----------------------------------------------------------------------------------------------------------------------------
  * 2、/S{6,}         不能为空 六位以上
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  * 3、^/d+$          不能有空格 不能非数字
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  * 4、(.*)(/.jpg|/.bmp)$ 只能是jpg和bmp格式
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  * 5、^/d{4}/-/d{1,2}-/d{1,2}$ 只能是2004-10-22格式
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  * 6、^0$            至少选一项
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  * 7、^0{2,}$        至少选两项
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  * 8、^[/s|/S]{20,}$ 不能为空 二十字以上
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  * 9、^/+?[a-z0-9](([-+.]|[_]+)?[a-z0-9]+)*@([a-z0-9]+(/.|/-))+[a-z]{2,6}$邮件
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  * 10、/w+([-+.]/w+)*@/w+([-.]/w+)*/./w+([-.]/w+)*([,;]/s*/w+([-+.]/w+)*@/w+([-.]/w+)*/./w+([-.]/w+)*)* 输入多个地址用逗号或空格分隔邮件
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  * 11、^(/([0-9]+/))?[0-9]{7,8}$电话号码7位或8位或前面有区号例如(022)87341628
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  * 12、^[a-z A-Z 0-9 _]+@[a-z A-Z 0-9 _]+(/.[a-z A-Z 0-9 _]+)+(/,[a-z A-Z 0-9 _]+@[a-z A-Z 0-9 _]+(/.[a-z A-Z 0-9 _]+)+)*$
  *     只能是字母、数字、下划线;必须有@和.同时格式要规范 邮件
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  * 13 ^/w+@/w+(/./w+)+(/,/w+@/w+(/./w+)+)*$上面表达式也可以写成这样子,更精练。
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    14   ^/w+((-/w+)|(/./w+))*/@/w+((/.|-)/w+)*/./w+$ [/size]

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