package src;
import java.io.UnsupportedEncodingException;
public class ChangeCharset {
/** 7位ASCII字符，也叫作ISO646-US、Unicode字符集的基本拉丁塊 */
public static final String US_ASCII = "US-ASCII";
/** ISO 拉丁字母表 No.1，也叫作 ISO-LATIN-1 */
public static final String ISO_8859_1 = "ISO-8859-1";
/** 8 位 UCS 轉換格式 */
public static final String UTF_8 = "UTF-8";
/** 16 位 UCS 轉換格式，Big Endian（最低地址存放高位字節）字節順序 */
public static final String UTF_16BE = "UTF-16BE";
/** 16 位 UCS 轉換格式，Little-endian（最高地址存放低位字節）字節順序 */
public static final String UTF_16LE = "UTF-16LE";
/** 16 位 UCS 轉換格式，字節順序由可選的字節順序標記來標識 */
public static final String UTF_16 = "UTF-16";
/** 中文超大字符集 */
public static final String GBK = "GBK";
/**
* 將字符編碼轉換成US-ASCII碼
*/
public String toASCII(String str) throws UnsupportedEncodingException{
return this.changeCharset(str, US_ASCII);
}
/**
* 將字符編碼轉換成ISO-8859-1碼
*/
public String toISO_8859_1(String str) throws UnsupportedEncodingException{
return this.changeCharset(str, ISO_8859_1);
}
/**
* 將字符編碼轉換成UTF-8碼
*/
public String toUTF_8(String str) throws UnsupportedEncodingException{
return this.changeCharset(str, UTF_8);
}
/**
* 將字符編碼轉換成UTF-16BE碼
*/
public String toUTF_16BE(String str) throws UnsupportedEncodingException{
return this.changeCharset(str, UTF_16BE);
}
/**
* 將字符編碼轉換成UTF-16LE碼
*/
public String toUTF_16LE(String str) throws UnsupportedEncodingException{
return this.changeCharset(str, UTF_16LE);
}
/**
* 將字符編碼轉換成UTF-16碼
*/
public String toUTF_16(String str) throws UnsupportedEncodingException{
return this.changeCharset(str, UTF_16);
}
/**
* 將字符編碼轉換成GBK碼
*/
public String toGBK(String str) throws UnsupportedEncodingException{
return this.changeCharset(str, GBK);
}
/**
* 字符串編碼轉換的實現方法
* @param str 待轉換編碼的字符串
* @param newCharset 目標編碼
* @return
* @throws UnsupportedEncodingException
*/
public String changeCharset(String str, String newCharset)
throws UnsupportedEncodingException {
if (str != null) {
//用默認字符編碼解碼字符串。
byte[] bs = str.getBytes();
//用新的字符編碼生成字符串
return new String(bs, newCharset);
}
return null;
}
/**
* 字符串編碼轉換的實現方法
* @param str 待轉換編碼的字符串
* @param oldCharset 原編碼
* @param newCharset 目標編碼
* @return
* @throws UnsupportedEncodingException
*/
public String changeCharset(String str, String oldCharset, String newCharset)
throws UnsupportedEncodingException {
if (str != null) {
//用舊的字符編碼解碼字符串。解碼可能會出現異常。
byte[] bs = str.getBytes(oldCharset);
//用新的字符編碼生成字符串
return new String(bs, newCharset);
}
return null;
}
public static void main(String[] args) throws UnsupportedEncodingException {
ChangeCharset test = new ChangeCharset();
String str = "This is a 中文的 String!";
System.out.println("str: " + str);
String gbk = test.toGBK(str);
System.out.println("轉換成GBK碼: " + gbk);
System.out.println();
String ascii = test.toASCII(str);
System.out.println("轉換成US-ASCII碼: " + ascii);
gbk = test.changeCharset(ascii,ChangeCharset.US_ASCII, ChangeCharset.GBK);
System.out.println("再把ASCII碼的字符串轉換成GBK碼: " + gbk);
System.out.println();
String iso88591 = test.toISO_8859_1(str);
System.out.println("轉換成ISO-8859-1碼: " + iso88591);
gbk = test.changeCharset(iso88591,ChangeCharset.ISO_8859_1, ChangeCharset.GBK);
System.out.println("再把ISO-8859-1碼的字符串轉換成GBK碼: " + gbk);
System.out.println();
String utf8 = test.toUTF_8(str);
System.out.println("轉換成UTF-8碼: " + utf8);
gbk = test.changeCharset(utf8,ChangeCharset.UTF_8, ChangeCharset.GBK);
System.out.println("再把UTF-8碼的字符串轉換成GBK碼: " + gbk);
System.out.println();
String utf16be = test.toUTF_16BE(str);
System.out.println("轉換成UTF-16BE碼:" + utf16be);
gbk = test.changeCharset(utf16be,ChangeCharset.UTF_16BE, ChangeCharset.GBK);
System.out.println("再把UTF-16BE碼的字符串轉換成GBK碼: " + gbk);
}
}