代码如下：
1 public class Main_bytesToStr { 2 3 public static void main(String[] args) throws IOException { 4 // TODO Auto-generated method stub 5 System.out.println("defaultCharset: " + Charset.defaultCharset().name()); 6 System.out.println("file.encoding:" + System.getProperty("file.encoding")); 7 System.out.println(); 8 9 String word = "a好";// 字符或字符串在Java内存中始终以内部编码即UTF-16保存。且采用大端 10 printTransStr(word, "ISO-8859-1"); 11 printTransStr(word, "GBK"); 12 printTransStr(word, "Unicode"); 13 printTransStr(word, "UTF-16"); 14 printTransStr(word, "UTF-16BE"); 15 printTransStr(word, "UTF-16LE"); 16 System.out.println(); 17 18 InputStreamReader ir = new InputStreamReader(System.in); 19 20 } 21 22 public static void printTransStr(String word, String charset) throws UnsupportedEncodingException { 23 System.out.println("--------" + word + " " + charset + "--------"); 24 byte[] bytes = word.getBytes(charset); 25 System.out.println(binaryToStr(bytes, 2)); 26 System.out.println(binaryToStr(bytes, 8)); 27 System.out.println(binaryToStr(bytes, 10)); 28 System.out.println(binaryToStr(bytes, 16)); 29 } 30 31 /** 32 * 将byte[]转为各种进制的字符串 33 * 34 * @param bytes 35 * byte[] 36 * @param radix 37 * 基数可以转换进制的范围，从Character.MIN_RADIX到Character.MAX_RADIX，超出范围后变为10进制 38 * @return 转换后的字符串 39 */ 40 public static String binaryToStr(byte[] bytes, int radix) { 41 return new BigInteger(1, bytes).toString(radix);// 这里的1代表正数 42 // System.out.printf("%x ",bytes[0]); 43 } 44 }
结果如下：
1 defaultCharset: GBK 2 file.encoding:GBK 3 4 --------a好 ISO-8859-1-------- 5 110000100111111 6 60477 7 24895 8 613f 9 --------a好 GBK-------- 10 11000011011101011000011 11 30335303 12 6404803 13 61bac3 14 --------a好 Unicode-------- 15 111111101111111100000000011000010101100101111101 16 7757740030254575 17 280371176495485 18 feff0061597d 19 --------a好 UTF-16-------- 20 111111101111111100000000011000010101100101111101 21 7757740030254575 22 280371176495485 23 feff0061597d 24 --------a好 UTF-16BE-------- 25 11000010101100101111101 26 30254575 27 6379901 28 61597d 29 --------a好 UTF-16LE-------- 30 1100001000000000111110101011001 31 14100076531 32 1627422041 33 61007d59
从Unicode或UTF-16的结果也可以看出，JVM采用大端方式存多字节的数据。