java Unicode 转 utf-8 汉字

例子：

Unicode：\u9ed1\u9f99\u6c5f 转化为汉字

java方法：

public static String unicodeToChina(String str) { Charset set = Charset.forName("UTF-16"); Pattern p = Pattern.compile("\\\\u([0-9a-fA-F]{4})"); Matcher m = p.matcher( str ); int start = 0 ; int start2 = 0 ; StringBuffer sb = new StringBuffer(); while( m.find( start ) ) { start2 = m.start() ; if( start2 > start ){ String seg = str.substring(start, start2) ; sb.append( seg ); } String code = m.group( 1 ); int i = Integer.valueOf( code , 16 ); byte[] bb = new byte[ 4 ] ; bb[ 0 ] = (byte) ((i >> 8) & 0xFF ); bb[ 1 ] = (byte) ( i & 0xFF ) ; ByteBuffer b = ByteBuffer.wrap(bb); sb.append( String.valueOf( set.decode(b) ).trim() ); start = m.end() ; } start2 = str.length() ; if( start2 > start ){ String seg = str.substring(start, start2) ; sb.append( seg ); } return sb.toString() ; } 测试方法：

public static void main(String[] args) { String test = unicodeToChina("\u9ed1\u9f99\u6c5f"); System.out.println(test); }

输出结果：

黑龙江