java字串應用之字串編碼轉換
阿新 • • 發佈:2019-01-25
{
/** 7位ASCII字元,也叫作ISO646-US、Unicode字符集的基本拉丁塊 */
publicstaticfinal String US_ASCII ="US-ASCII";
/** ISO拉丁字母表 No.1,也叫做ISO-LATIN-1 */
publicstaticfinal String ISO_8859_1 ="ISO-8859-1";
/** 8 位 UCS 轉換格式 */
publicstaticfinal String UTF_8 ="UTF-8";
/** 16 位 UCS 轉換格式,Big Endian(最低地址存放高位位元組)位元組順序 */
publicstaticfinal String UTF_16BE ="UTF-16BE";
/** 16 位 UCS 轉換格式,Litter Endian(最高地址存放地位位元組)位元組順序 */
publicstaticfinal String UTF_16LE ="UTF-16LE";
/** 16 位 UCS 轉換格式,位元組順序由可選的位元組順序標記來標識 */
publicstaticfinal String UTF_16 ="UTF-16";
/** 中文超大字符集 **/
publicstatic final String GBK ="GBK";
publicstaticfinal String GB2312 ="GB2312";
/** 將字元編碼轉換成US-ASCII碼 */
public String toASCII(String str) throws UnsupportedEncodingException {
returnthis.changeCharset(str, US_ASCII);
}
/** 將字元編碼轉換成ISO-8859-1 */
public String toISO_8859_1(String str) throws UnsupportedEncodingException {
returnthis.changeCharset(str, ISO_8859_1);
}
/** 將字元編碼轉換成UTF-8 */
public String toUTF_8(String str) throws UnsupportedEncodingException {
returnthis.changeCharset(str, UTF_8);
}
/** 將字元編碼轉換成UTF-16BE */
public String toUTF_16BE(String str) throws UnsupportedEncodingException{
returnthis.changeCharset(str, UTF_16BE);
}
/** 將字元編碼轉換成UTF-16LE */
public String toUTF_16LE(String str) throws UnsupportedEncodingException {
returnthis.changeCharset(str, UTF_16LE);
}
/** 將字元編碼轉換成UTF-16 */
public String toUTF_16(String str) throws UnsupportedEncodingException {
returnthis.changeCharset(str, UTF_16);
}
/** 將字元編碼轉換成GBK */
public String toGBK(String str) throws UnsupportedEncodingException {
returnthis.changeCharset(str, GBK);
}
/** 將字元編碼轉換成GB2312 */
public String toGB2312(String str) throws UnsupportedEncodingException {
returnthis.changeCharset(str,GB2312);
}
/**
* 字串編碼轉換的實現方法
* @param str 待轉換的字串
* @param newCharset 目標編碼
*/
public String changeCharset(String str, String newCharset) throws UnsupportedEncodingException {
if(str !=null) {
//用預設字元編碼解碼字串。與系統相關,中文windows預設為GB2312
byte[] bs = str.getBytes();
returnnew String(bs, newCharset); //用新的字元編碼生成字串
}
returnnull;
}
/**
* 字串編碼轉換的實現方法
* @param str 待轉換的字串
* @param oldCharset 源字符集
* @param newCharset 目標字符集
*/
public String changeCharset(String str, String oldCharset, String newCharset) throws UnsupportedEncodingException {
if(str !=null) {
//用源字元編碼解碼字串
byte[] bs = str.getBytes(oldCharset);
returnnew String(bs, newCharset);
}
returnnull;
}
publicstaticvoid 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:"+ ascii);
System.out.println();
String iso88591 = test.toISO_8859_1(str);
System.out.println("轉換成ISO-8859-1碼:"+ iso88591);
System.out.println();
gbk = test.changeCharset(iso88591, ISO_8859_1, GBK);
System.out.println("再把ISO-8859-1碼的字串轉換成GBK碼:"+ gbk);
System.out.println();
String utf8 = test.toUTF_8(str);
System.out.println();
System.out.println("轉換成UTF-8碼:"+ utf8);
String utf16be = test.toUTF_16BE(str);
System.out.println("轉換成UTF-16BE碼:"+ utf16be);
gbk = test.changeCharset(utf16be, UTF_16BE, GBK);
System.out.println("再把UTF-16BE編碼的字元轉換成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, UTF_16LE, GBK);
System.out.println("再把UTF-16LE編碼的字串轉換成GBK碼:"+ gbk);
System.out.println();
String utf16 = test.toUTF_16(str);
System.out.println("轉換成UTF-16碼:"+ utf16);
String gb2312 = test.changeCharset(utf16, UTF_16, GB2312);
System.out.println("再把UTF-16編碼的字串轉換成GB2312碼:"+ gb2312);
}
}
/** 7位ASCII字元,也叫作ISO646-US、Unicode字符集的基本拉丁塊 */
publicstaticfinal String US_ASCII ="US-ASCII";
/** ISO拉丁字母表 No.1,也叫做ISO-LATIN-1 */
publicstaticfinal String ISO_8859_1 ="ISO-8859-1";
/** 8 位 UCS 轉換格式 */
publicstaticfinal String UTF_8 ="UTF-8";
/** 16 位 UCS 轉換格式,Big Endian(最低地址存放高位位元組)位元組順序
publicstaticfinal String UTF_16BE ="UTF-16BE";
/** 16 位 UCS 轉換格式,Litter Endian(最高地址存放地位位元組)位元組順序 */
publicstaticfinal String UTF_16LE ="UTF-16LE";
/** 16 位 UCS 轉換格式,位元組順序由可選的位元組順序標記來標識 */
publicstaticfinal String UTF_16 ="UTF-16";
/** 中文超大字符集 **/
publicstatic
publicstaticfinal String GB2312 ="GB2312";
/** 將字元編碼轉換成US-ASCII碼 */
public String toASCII(String str) throws UnsupportedEncodingException {
returnthis.changeCharset(str, US_ASCII);
}
/** 將字元編碼轉換成ISO-8859-1 */
public String toISO_8859_1(String str)
returnthis.changeCharset(str, ISO_8859_1);
}
/** 將字元編碼轉換成UTF-8 */
public String toUTF_8(String str) throws UnsupportedEncodingException {
returnthis.changeCharset(str, UTF_8);
}
/** 將字元編碼轉換成UTF-16BE */
public String toUTF_16BE(String str) throws UnsupportedEncodingException{
returnthis.changeCharset(str, UTF_16BE);
}
/** 將字元編碼轉換成UTF-16LE */
public String toUTF_16LE(String str) throws UnsupportedEncodingException {
returnthis.changeCharset(str, UTF_16LE);
}
/** 將字元編碼轉換成UTF-16 */
public String toUTF_16(String str) throws UnsupportedEncodingException {
returnthis.changeCharset(str, UTF_16);
}
/** 將字元編碼轉換成GBK */
public String toGBK(String str) throws UnsupportedEncodingException {
returnthis.changeCharset(str, GBK);
}
/** 將字元編碼轉換成GB2312 */
public String toGB2312(String str) throws UnsupportedEncodingException {
returnthis.changeCharset(str,GB2312);
}
/**
* 字串編碼轉換的實現方法
* @param str 待轉換的字串
* @param newCharset 目標編碼
*/
public String changeCharset(String str, String newCharset) throws UnsupportedEncodingException {
if(str !=null) {
//用預設字元編碼解碼字串。與系統相關,中文windows預設為GB2312
byte[] bs = str.getBytes();
returnnew String(bs, newCharset); //用新的字元編碼生成字串
}
returnnull;
}
/**
* 字串編碼轉換的實現方法
* @param str 待轉換的字串
* @param oldCharset 源字符集
* @param newCharset 目標字符集
*/
public String changeCharset(String str, String oldCharset, String newCharset) throws UnsupportedEncodingException {
if(str !=null) {
//用源字元編碼解碼字串
byte[] bs = str.getBytes(oldCharset);
returnnew String(bs, newCharset);
}
returnnull;
}
publicstaticvoid 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:"+ ascii);
System.out.println();
String iso88591 = test.toISO_8859_1(str);
System.out.println("轉換成ISO-8859-1碼:"+ iso88591);
System.out.println();
gbk = test.changeCharset(iso88591, ISO_8859_1, GBK);
System.out.println("再把ISO-8859-1碼的字串轉換成GBK碼:"+ gbk);
System.out.println();
String utf8 = test.toUTF_8(str);
System.out.println();
System.out.println("轉換成UTF-8碼:"+ utf8);
String utf16be = test.toUTF_16BE(str);
System.out.println("轉換成UTF-16BE碼:"+ utf16be);
gbk = test.changeCharset(utf16be, UTF_16BE, GBK);
System.out.println("再把UTF-16BE編碼的字元轉換成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, UTF_16LE, GBK);
System.out.println("再把UTF-16LE編碼的字串轉換成GBK碼:"+ gbk);
System.out.println();
String utf16 = test.toUTF_16(str);
System.out.println("轉換成UTF-16碼:"+ utf16);
String gb2312 = test.changeCharset(utf16, UTF_16, GB2312);
System.out.println("再把UTF-16編碼的字串轉換成GB2312碼:"+ gb2312);
}
}