java 中文与unicode互转

1public class FontUtil {
2
3    public static void main(String[] args) {
4        System.out.println(chinaToUnicode("未登陆！"));
5        System.out.println(decodeUnicode("\u672a\u767b\u9646\uff01"));
6    }
7    
8     /** 
9     * 把中文转成Unicode码 
10     *  
11     * @param str 
12     * @return 
13     */  
14    public static String chinaToUnicode(String str) {  
15        String result = "";  
16        for (int i = 0; i < str.length(); i++) {  
17            int chr1 = (char) str.charAt(i);  
18            if (chr1 >= 19968 && chr1 <= 171941) {// 汉字范围 \u4e00-\u9fa5 (中文)  
19                result += "\\u" + Integer.toHexString(chr1);  
20            } else {  
21                result += str.charAt(i);  
22            }  
23        }  
24        return result;  
25    }  
26  
27    /** 
28     * 判断是否为中文字符 
29     *  
30     * @param c 
31     * @return 
32     */  
33    public static boolean isChinese(char c) {  
34        Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);  
35        if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS  
36                || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS  
37                || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A  
38                || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION  
39                || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION  
40                || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {  
41            return true;  
42        }  
43        return false;  
44    }  
45    
46    
47    //Unicode转中文  
48    public static String decodeUnicode(final String unicode) {     
49         StringBuffer string = new StringBuffer();  
50         
51         String[] hex = unicode.split("\\\\u");  
52   
53         for (int i = 0; i < hex.length; i++) {  
54               
55             try {  
56                 // 汉字范围 \u4e00-\u9fa5 (中文)  
57                 if(hex[i].length()>=4){//取前四个，判断是否是汉字  
58                     String chinese = hex[i].substring(0, 4);  
59                     try {  
60                         int chr = Integer.parseInt(chinese, 16);  
61                         boolean isChinese = isChinese((char) chr);  
62                         //转化成功，判断是否在  汉字范围内  
63                         if (isChinese){//在汉字范围内  
64                             // 追加成string  
65                             string.append((char) chr);  
66                             //并且追加  后面的字符  
67                             String behindString = hex[i].substring(4);  
68                             string.append(behindString);  
69                         }else {  
70                             string.append(hex[i]);  
71                         }  
72                     } catch (NumberFormatException e1) {  
73                         string.append(hex[i]);  
74                     }  
75                       
76                 }else{  
77                     string.append(hex[i]);  
78                 }  
79             } catch (NumberFormatException e) {  
80                 string.append(hex[i]);  
81             }  
82         }  
83   
84         return string.toString();  
85    }  
86    
87}