private static String clearNotChinese(String buff){
      String tmpString =buff.replaceAll("(?i)[^a-zA-Z0-9\u4E00-\u9FA5]", "");//去掉所有中英文符号
     char[] carr = tmpString.toCharArray();
     
     for(int i = 0; i<tmpString.length();i++){
      if(carr[i] < 0xFF){
       carr[i] = ' ' ;//过滤掉非汉字内容
      }
      
     }
     return String.copyValueOf(carr).trim();
      }

 

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