Java编码转义

    import java.io.UnsupportedEncodingException;

    /**
    * 转换字符串的编码
    */
    public class ChangeCharset {
    /** 7位ASCII字符，也叫作ISO646-US、Unicode字符集的基本拉丁块 */
    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 转换格式 */
    public static final String UTF_8 = "UTF-8";

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

    /** 16 位 UCS 转换格式，Little-endian（最高地址存放低位字节）字节顺序 */
    public static final String UTF_16LE = "UTF-16LE";

    /** 16 位 UCS 转换格式，字节顺序由可选的字节顺序标记来标识 */
    public static final String UTF_16 = "UTF-16";

    /** 中文超大字符集 */
    public static final String GBK = "GBK";

    /**
    * 将字符编码转换成US-ASCII码
    */
    public String toASCII(String str) throws UnsupportedEncodingException {
    return this.changeCharset(str, US_ASCII);
    }
    /**
    * 将字符编码转换成ISO-8859-1码
    */
    public String toISO_8859_1(String str) throws UnsupportedEncodingException {
    return this.changeCharset(str, ISO_8859_1);
    }
    /**
    * 将字符编码转换成UTF-8码
    */
    public String toUTF_8(String str) throws UnsupportedEncodingException {
    return this.changeCharset(str, UTF_8);
    }
    /**
    * 将字符编码转换成UTF-16BE码
    */
    public String toUTF_16BE(String str) throws UnsupportedEncodingException {
    return this.changeCharset(str, UTF_16BE);
    }
    /**
    * 将字符编码转换成UTF-16LE码
    */
    public String toUTF_16LE(String str) throws UnsupportedEncodingException {
    return this.changeCharset(str, UTF_16LE);
    }
    /**
    * 将字符编码转换成UTF-16码
    */
    public String toUTF_16(String str) throws UnsupportedEncodingException {
    return this.changeCharset(str, UTF_16);
    }
    /**
    * 将字符编码转换成GBK码
    */
    public String toGBK(String str) throws UnsupportedEncodingException {
    return this.changeCharset(str, GBK);
    }

    /**
    * 字符串编码转换的实现方法
    * @param str 待转换编码的字符串
    * @param newCharset 目标编码
    * @return
    * @throws UnsupportedEncodingException
    */
    public String changeCharset(String str, String newCharset)
    throws UnsupportedEncodingException {
    if (str != null) {
    //用默认字符编码解码字符串。
    byte[] bs = str.getBytes();
    //用新的字符编码生成字符串
    return new String(bs, newCharset);
    }
    return null;
    }
    /**
    * 字符串编码转换的实现方法
    * @param str 待转换编码的字符串
    * @param oldCharset 原编码
    * @param newCharset 目标编码
    * @return
    * @throws UnsupportedEncodingException
    */
    public String changeCharset(String str, String oldCharset, String newCharset)
    throws UnsupportedEncodingException {
    if (str != null) {
    //用旧的字符编码解码字符串。解码可能会出现异常。
    byte[] bs = str.getBytes(oldCharset);
    //用新的字符编码生成字符串
    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("转换成GBK码: " + gbk);
    System.out.println();
    String ascii = test.toASCII(str);
    System.out.println("转换成US-ASCII码: " + ascii);
    gbk = test.changeCharset(ascii,ChangeCharset.US_ASCII, ChangeCharset.GBK);
    System.out.println("再把ASCII码的字符串转换成GBK码: " + gbk);
    System.out.println();
    String iso88591 = test.toISO_8859_1(str);
    System.out.println("转换成ISO-8859-1码: " + iso88591);
    gbk = test.changeCharset(iso88591,ChangeCharset.ISO_8859_1, ChangeCharset.GBK);
    System.out.println("再把ISO-8859-1码的字符串转换成GBK码: " + gbk);
    System.out.println();
    String utf8 = test.toUTF_8(str);
    System.out.println("转换成UTF-8码: " + utf8);
    gbk = test.changeCharset(utf8,ChangeCharset.UTF_8, ChangeCharset.GBK);
    System.out.println("再把UTF-8码的字符串转换成GBK码: " + gbk);
    System.out.println();
    String utf16be = test.toUTF_16BE(str);
    System.out.println("转换成UTF-16BE码:" + utf16be);
    gbk = test.changeCharset(utf16be,ChangeCharset.UTF_16BE, ChangeCharset.GBK);
    System.out.println("再把UTF-16BE码的字符串转换成GBK码: " + gbk);
    System.out.println();
    String utf16le = test.toUTF_16LE(str);
    System.out.println("转换成UTF-16LE码:" + utf16le);
    gbk = test.changeCharset(utf16le,ChangeCharset.UTF_16LE, ChangeCharset.GBK);
    System.out.println("再把UTF-16LE码的字符串转换成GBK码: " + gbk);
    System.out.println();
    String utf16 = test.toUTF_16(str);
    System.out.println("转换成UTF-16码:" + utf16);
    gbk = test.changeCharset(utf16,ChangeCharset.UTF_16LE, ChangeCharset.GBK);
    System.out.println("再把UTF-16码的字符串转换成GBK码: " + gbk);
    String s = new String("中文".getBytes("UTF-8"),"UTF-8");
    System.out.println(s);
    }
    }