1. import     java.io.UnsupportedEncodingException;

  3. public class ChangeCharset {

  4. //7位ASCII字符，也叫做ISO646-US，Unicode字符集的基本拉丁快
  5. public static final String US_ASCII ="US-ASCII";

  6. //ISO拉丁字母表No.1,也叫做ISO-LATIN-1
  7. public static final String ISO_8859_1="ISO-8859-1";

  8. //8位UCS转换格式
  9. public static final String UTF_8="UTF-8";

  10. //16位UCS转换格式,Big Endian(最低地址存放高位字节)字节顺序
  11. public static final String UTF_16BE="UTF-16BE";

  12. //16位UCS转换格式,Litter Endian(最高地址存放低位字节)
  13. public static final String UTF_16LE ="UTF-16LE";

  14. //16位UCS转换格式,字节顺序由可选的字节顺序标记来标识
  15. public static final String UTF_16 = "UTF-16";
  16. //中文超大字符集
  17. public static final String GBK = "GBK";
  18. //
  19. public static final String GB2312 ="GB2312";
  21. public String changeCharSet(String str,String newCharset) throws UnsupportedEncodingException{
  22. if(str!=null){
  23. //用默认字符编码解码字符串,与系统相关,中文Windows默认为GB2312
  24. byte[] bs =str.getBytes();
  25. //用新的字符编码生成字符串
  26. return new String(bs,newCharset);
  27.         }
  28. return null;
  29.     }
  31. public String changeCharset(String str,String oldCharset,String newCharset) throws UnsupportedEncodingException{
  32. if(str != null){
  33. //用源字符编码解码字符串
  34. byte[] bs = str.getBytes(oldCharset);
  35. return new String(bs,newCharset);
  36.         }
  37. return null;
  38.     }
  40. public String toASCII(String str) throws UnsupportedEncodingException{
  41. return this.changeCharSet(str, US_ASCII);
  42.     }
  44. public String toISO_8859_1(String str) throws UnsupportedEncodingException{
  45. return this.changeCharSet(str, ISO_8859_1);
  46.     }
  48. public String toUTF_8(String str) throws UnsupportedEncodingException{
  49. return this.changeCharSet(str, UTF_8);
  51.     }
  53. public String toUTF_16BE(String str) throws UnsupportedEncodingException{
  54. return this.changeCharSet(str, UTF_16BE);
  55.     }
  57. public String toUTF_16LE(String str) throws UnsupportedEncodingException{
  58. return this.changeCharSet(str, UTF_16LE);
  59.     }
  61. public String toUTF_16(String str) throws UnsupportedEncodingException{
  62. return this.changeCharSet(str, UTF_16);
  63.     }
  65. public String toGBK(String str) throws UnsupportedEncodingException{
  66. return this.changeCharSet(str, GBK);
  67.     }
  69. public String toGB2312(String str) throws UnsupportedEncodingException{
  70. return this.changeCharSet(str, GB2312);
  71.     }
  72. }
将字符串转换其他格式的前提是将其转换为字节数组...