- package book.string;
- import java.io.UnsupportedEncodingException;
- /**
- * 轉換字符串的編碼
- */
- 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);
- System.out.println();
- String utf16le = test.toUTF_16LE(str);
- System.out.println("轉換成UTF-16LE碼:" + utf16le);
- gbk = test.changeCharset(utf16le,ChangeCharset.UTF_16LE, ChangeCharset.GBK);
- System.out.println("再把UTF-16LE碼的字符串轉換成GBK碼: " + gbk);
- System.out.println();
- String utf16 = test.toUTF_16(str);
- System.out.println("轉換成UTF-16碼:" + utf16);
- gbk = test.changeCharset(utf16,ChangeCharset.UTF_16LE, ChangeCharset.GBK);
- System.out.println("再把UTF-16碼的字符串轉換成GBK碼: " + gbk);
- String s = new String("中文".getBytes("UTF-8"),"UTF-8");
- System.out.println(s);
- }
- }