javascript字符串循环匹配实例分析
本文实例讲述了javascript字符串循环匹配的方法。分享给大家供大家参考。具体如下：
采用exec和String.match方法，对于exec必须开启全局匹配g标识才能获取所有匹配
//需要提取这种数据<td>2012-12-17</td><td>11:02,12:25,13:22,15:06,15:12,19:22,23:47</td>
varrawData='<table><thalign="left"scope="col">日期</th><thalign="left"scope="col">签到签退时间</th></tr><trclass="GridViewRowStyle"style="height:20px;">'
+'<td>2012-12-03</td><td>10:16,13:22,20:05</td></tr><trclass="GridViewRowStyle"style="height:20px;">'
+'<td>2012-12-04</td><td>11:16,14:22,21:05</td></tr><table>';
//方法一
varregexp=/<td>(\d{4}-\d{2}-\d{2})<\/td><td>(.*?)<\/td>/g;
//加上g标识才会全局匹配，否则只匹配一个
varmatchedArray=regexp.exec(rawData);
while(matchedArray!=null){
console.dir(matchedArray);
matchedArray=regexp.exec(rawData);
}
//方法二
varregexp=/<td>(\d{4}-\d{2}-\d{2})<\/td><td>(.*?)<\/td>/g;
//加上g标识才会全局匹配
varmatchedArray=rawData.match(regexp);
console.dir(matchedArray);
//方法三
varregexp=/<td>(\d{4}-\d{2}-\d{2})<\/td><td>(.*?)<\/td>/;
//不加g标识
varmatchedArray=rawData.match(regexp);
console.dir(matchedArray);
console.log(matchedArray.index);
while(matchedArray!=null){
rawData=rawData.substr(matchedArray.index+matchedArray[0].length);
matchedArray=rawData.match(regexp);
}
console.dir(matchedArray);
希望本文所述对大家的javascript程序设计有所帮助。