Java判断字符串是否含有乱码实例代码

具体代码如下所示：

/**
  * 判断字符是否是中文
  *
  * @param c 字符
  * @return 是否是中文
  */
 public static boolean ischinese(char c) {
  character.unicodeblock ub = character.unicodeblock.of(c);
  if (ub == character.unicodeblock.cjk_unified_ideographs
    || ub == character.unicodeblock.cjk_compatibility_ideographs
    || ub == character.unicodeblock.cjk_unified_ideographs_extension_a
    || ub == character.unicodeblock.general_punctuation
    || ub == character.unicodeblock.cjk_symbols_and_punctuation
    || ub == character.unicodeblock.halfwidth_and_fullwidth_forms) {
   return true;
  }
  return false;
 }
 /**
  * 判断字符串是否是乱码
  *
  * @param strname 字符串
  * @return 是否是乱码
  */
 public static boolean ismessycode(string strname) {
  pattern p = pattern.compile("\s*|t*|r*|n*");
  matcher m = p.matcher(strname);
  string after = m.replaceall("");
  string temp = after.replaceall("\p{p}", "");
  char[] ch = temp.trim().tochararray();
  float chlength = ch.length;
  float count = 0;
  for (int i = 0; i < ch.length; i++) {
   char c = ch[i];
   if (!character.isletterordigit(c)) {
    if (!ischinese(c)) {
     count = count + 1;
    }
   }
  }
  float result = count / chlength;
  if (result > 0.4) {
   return true;
  } else {
   return false;
  }
 }
 public static void main(string[] args) {
  system.out.println(ismessycode("ã©å¸â©ã©â¡âºã¥â¹â³"));
  system.out.println(ismessycode("你好"));
 }

总结

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