1.检测是否为乱码

public static booleanisMessyCode(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 = 0;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;

}

chLength++;

}

}float result = count /chLength ;if (result > 0.4) {return true;

}else{return false;

}

}

2.检查字符是否为中文

private static boolean isChinese(charc) {

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;

}

3.中文转换编码

public staticString toChinese(String msg){if(isMessyCode(msg)){try{return new String(msg.getBytes("ISO8859-1"), "UTF-8");

}catch(Exception e) {

}

}returnmsg ;

}

Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS ： 4E00-9FBF：CJK 统一表意符号

Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS ：F900-FAFF：CJK

兼容象形文字 Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A

：3400-4DBF：CJK 统一表意符号扩展 A

CJK的意思是“Chinese，Japanese，Korea”的简写 ，实际上就是指中日韩三国的象形文字的Unicode编码

Character.UnicodeBlock.GENERAL_PUNCTUATION ：2000-206F：常用标点

Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION ：3000-303F：CJK 符号和标点

Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS ：FF00-FFEF：半角及全角形式

Character.isLetter(c)：判断字符是否是字母

Character.isDigit(c)：判断字符是否是数字