短信中的的 UCS2的编码与解码方法（java）

from: http://www.blogjava.net/cmzy/archive/2009/01/06/250102.html

 

最近，做一个关于SMS的程序，需要对中文部分进行UCS编码，这里用了两个函数，可以将短信中的UCS2字符串在UCS2和GBK之间装换。记录以下代 码：

/**
 * UCS2解码
 *
 * @param src
 *            UCS2 源串
 * @return 解码后的UTF-16BE字符串
 */
public
 
static
 String DecodeUCS2(String src) {
    byte
[] bytes = 
new
 
byte
[src.length() / 
2
];

    for
 (
int
 i = 
0
; i < src.length(); i += 
2
) {
        bytes[i / 2
] = (
byte
) (Integer
                .parseInt(src.substring(i, i + 2
), 
16
));
    }
    String reValue;
    try
 {
        reValue = new
 String(bytes, 
"UTF-16BE"
);
    } catch
 (UnsupportedEncodingException e) {
        throw
 
new
 PduDecodeException(e);
    }
    return
 reValue;

}

/**
 * UCS2编码
 *
 * @param src
 *            UTF-16BE编码的源串
 * @return 编码后的UCS2串
 */
public
 
static
 String EncodeUCS2(String src) {

    byte
[] bytes;
    try
 {
        bytes = src.getBytes("UTF-16BE"
);
    } catch
 (UnsupportedEncodingException e) {
        throw
 
new
 PduEncodeException(e);
    }

    StringBuffer reValue = new
 StringBuffer();
    StringBuffer tem = new
 StringBuffer();
    for
 (
int
 i = 
0
; i < bytes.length; i++) {
        tem.delete(0
, tem.length());
        tem.append(Integer.toHexString(bytes[i] & 0xFF
));
        if
(tem.length()==
1
){
            tem.insert(0
, '
0
');
        }
        reValue.append(tem);
    }
    return
 reValue.toString().toUpperCase();
}

	/**
	 * UCS2解码
	 * 
	 * @param src
	 *            UCS2 源串
	 * @return 解码后的UTF-16BE字符串
	 */
	public static String DecodeUCS2(String src) {
		byte[] bytes = new byte[src.length() / 2];
		for (int i = 0; i < src.length(); i += 2) {
			bytes[i / 2] = (byte) (Integer
					.parseInt(src.substring(i, i + 2), 16));
		}
		String reValue;
		try {
			reValue = new String(bytes, "UTF-16BE");
		} catch (UnsupportedEncodingException e) {
			throw new PduDecodeException(e);
		}
		return reValue;
	}
	/**
	 * UCS2编码
	 * 
	 * @param src
	 *            UTF-16BE编码的源串
	 * @return 编码后的UCS2串
	 */
	public static String EncodeUCS2(String src) {
		
		byte[] bytes;
		try {
			bytes = src.getBytes("UTF-16BE");
		} catch (UnsupportedEncodingException e) {
			throw new PduEncodeException(e);
		}
		StringBuffer reValue = new StringBuffer();
		StringBuffer tem = new StringBuffer();
		for (int i = 0; i < bytes.length; i++) {
			tem.delete(0, tem.length());
			tem.append(Integer.toHexString(bytes[i] & 0xFF));
			if(tem.length()==1){
				tem.insert(0, '0');
			}
			reValue.append(tem);
		}
		return reValue.toString().toUpperCase();
	}

By：残梦追月