java 判断中文是否乱码

Java判断中文是否乱码

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1. import java.util.regex.Matcher;  
2. import java.util.regex.Pattern;  
3.   
4. public class ChineseUtill {  
5.   
6.     private static boolean isChinese(char c) {  
7.         Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);  
8.         if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS  
9.                 || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS  
10.                 || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A  
11.                 || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION  
12.                 || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION  
13.                 || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {  
14.             return true;  
15.         }  
16.         return false;  
17.     }  
18.       
19.     public static boolean isMessyCode(String strName) {  
20.         Pattern p = Pattern.compile("\\s*|\t*|\r*|\n*");  
21.         Matcher m = p.matcher(strName);  
22.         String after = m.replaceAll("");  
23.         String temp = after.replaceAll("\\p{P}", "");  
24.         char[] ch = temp.trim().toCharArray();  
25.         float chLength = 0 ;  
26.         float count = 0;  
27.         for (int i = 0; i < ch.length; i++) {  
28.             char c = ch[i];  
29.             if (!Character.isLetterOrDigit(c)) {  
30.                 if (!isChinese(c)) {  
31.                     count = count + 1;  
32.                 }  
33.                 chLength++;   
34.             }  
35.         }  
36.         float result = count / chLength ;  
37.         if (result > 0.4) {  
38.             return true;  
39.         } else {  
40.             return false;  
41.         }  
42.     }  
43.       
44.       
45.     public static String toChinese(Object msg){  
46.         String tempMsg = TransformUtils.toString(msg) ;  
47.         if(isMessyCode(tempMsg)){  
48.             try {  
49.                 return new String(tempMsg.getBytes("ISO8859-1"), "UTF-8");  
50.             } catch (Exception e) {  
51.             }  
52.         }  
53.         return tempMsg ;   
54.     }  
55. }  

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 ; }}