Java判断中文是否乱码
[java] view plain copy print ? import java.util.regex.Matcher; import java.util.regex.Pattern; public class ChineseUtill { private 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; } 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 = 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; } } public static String toChinese(Object msg){ String tempMsg = TransformUtils.toString(msg) ; if(isMessyCode(tempMsg)){ try { return new String(tempMsg.getBytes("ISO8859-1"), "UTF-8"); } catch (Exception e) { } } return tempMsg ; } } import java.util.regex.Matcher; import java.util.regex.Pattern; public class ChineseUtill { private 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; } 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 = 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; } } public static String toChinese(Object msg){ String tempMsg = TransformUtils.toString(msg) ; if(isMessyCode(tempMsg)){ try { return new String(tempMsg.getBytes("ISO8859-1"), "UTF-8"); } catch (Exception e) { } } return tempMsg ; } }