public String getContent()
    {
        String str = null;
        String tempStr =null;
        String regex = "<body.*?>(.*?)<\\/body>";
        Pattern pt=(regex);
        Matcher mt=pt.matcher(strContent);
         while(mt.find()){
             str = mt.group();
         }
        String regex1 = "<div id.*?</div>";
        Pattern p=(regex1);
        Matcher m=p.matcher(str);
        while(m.find()){
            str = m.group();
            tempStr+=str;
        }
      //  System.out.println();
     //   tempStr = tempStr.replaceAll("<style[^>]*?>.*?</style>","");
     //   tempStr = tempStr.replaceAll("<script[^>]*?>.*?<\\/script>","");
     //   tempStr = tempStr.replaceAll("<noscript[^>]*?>.*?</noscript>", "");
        tempStr = tempStr.replaceAll("<a href=.*?</a>", "").replaceAll("<a target.*?</a>","").replaceAll("\\s*", "");
        tempStr = tempStr.replaceAll("\\&[a-zA-Z]{1,10};", "").replaceAll(   
                "<[^>]*>", "").replaceAll("\\s*", "").replaceAll("null", "");
        length = tempStr.length();
     //    System.out.println(tempStr);

        return tempStr;
    }

请问：tempStr = tempStr.replaceAll("<a href=.*?</a>", "").replaceAll("<a target.*?</a>","").replaceAll("\\s*", "");
        tempStr = tempStr.replaceAll("\\&[a-zA-Z]{1,10};", "").replaceAll(   
                "<[^>]*>", "").replaceAll("\\s*", "").replaceAll("null", "");
        length = tempStr.length();
是什么意思啊？感谢！！！