工具方法json数据的Unicode乱码

 1 public static String decodeUnicode(String theString) {    
 2         char aChar;    
 3         int len = theString.length();    
 4         StringBuffer outBuffer = new StringBuffer(len);    
 5         for (int x = 0; x < len;) {    
 6             aChar = theString.charAt(x++);    
 7             if (aChar == '\\') {    
 8                 aChar = theString.charAt(x++);    
 9                 if (aChar == 'u') {    
10                     // Read the xxxx    
11                     int value = 0;    
12                     for (int i = 0; i < 4; i++) {    
13                         aChar = theString.charAt(x++);    
14                         switch (aChar) {    
15                         case '0':    
16                         case '1':    
17                         case '2':    
18                         case '3':    
19                         case '4':    
20                         case '5':    
21                         case '6':    
22                         case '7':    
23                         case '8':    
24                         case '9':    
25                             value = (value << 4) + aChar - '0';    
26                             break;    
27                         case 'a':    
28                         case 'b':    
29                         case 'c':    
30                         case 'd':    
31                         case 'e':    
32                         case 'f':    
33                             value = (value << 4) + 10 + aChar - 'a';    
34                             break;    
35                         case 'A':    
36                         case 'B':    
37                         case 'C':    
38                         case 'D':    
39                         case 'E':    
40                         case 'F':    
41                             value = (value << 4) + 10 + aChar - 'A';    
42                             break;    
43                         default:    
44                             throw new IllegalArgumentException(    
45                                     "Malformed   \\uxxxx   encoding.");    
46                         }    
47         
48                     }    
49                     outBuffer.append((char) value);    
50                 } else {    
51                     if (aChar == 't')    
52                         aChar = '\t';    
53                     else if (aChar == 'r')    
54                         aChar = '\r';    
55                     else if (aChar == 'n')    
56                         aChar = '\n';    
57                     else if (aChar == 'f')    
58                         aChar = '\f';    
59                     outBuffer.append(aChar);    
60                 }    
61             } else    
62                 outBuffer.append(aChar);    
63         }    
64         return outBuffer.toString();    
65     }