字节流、字符串、16进制字符串转换__Java（转）

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/**  * @Package:  * @ClassName:TypeConversion  * @Description:字节流、字符串、16进制字符串转换  * @author:xk  * @date:Jan 8, 2013 5:00:08 PM  */  public class TypeConversion {      /**      * @Title:bytes2HexString      * @Description:字节数组转16进制字符串      * @param b      *            字节数组      * @return 16进制字符串      * @throws      */      public static String bytes2HexString(byte[] b) {          StringBuffer result = new StringBuffer();          String hex;          for (int i = 0; i < b.length; i++) {              hex = Integer.toHexString(b[i] & 0xFF);              if (hex.length() == 1) {                  hex = '0' + hex;              }              result.append(hex.toUpperCase());          }          return result.toString();      }        /**      * @Title:hexString2Bytes      * @Description:16进制字符串转字节数组      * @param src      *            16进制字符串      * @return 字节数组      * @throws      */      public static byte[] hexString2Bytes(String src) {          int l = src.length() / 2;          byte[] ret = new byte[l];          for (int i = 0; i < l; i++) {              ret[i] = (byte) Integer                      .valueOf(src.substring(i * 2, i * 2 + 2), 16).byteValue();          }          return ret;      }        /**      * @Title:string2HexString      * @Description:字符串转16进制字符串      * @param strPart      *            字符串      * @return 16进制字符串      * @throws      */      public static String string2HexString(String strPart) {          StringBuffer hexString = new StringBuffer();          for (int i = 0; i < strPart.length(); i++) {              int ch = (int) strPart.charAt(i);              String strHex = Integer.toHexString(ch);              hexString.append(strHex);          }          return hexString.toString();      }        /**      * @Title:hexString2String      * @Description:16进制字符串转字符串      * @param src      *            16进制字符串      * @return 字节数组      * @throws      */      public static String hexString2String(String src) {          String temp = "";          for (int i = 0; i < src.length() / 2; i++) {              temp = temp                      + (char) Integer.valueOf(src.substring(i * 2, i * 2 + 2),                              16).byteValue();          }          return temp;      }            /**      * @Title:char2Byte      * @Description:字符转成字节数据char-->integer-->byte      * @param src      * @return      * @throws      */      public static Byte char2Byte(Character src) {          return Integer.valueOf((int)src).byteValue();      }                /**      * @Title:intToHexString      * @Description:10进制数字转成16进制      * @param a 转化数据      * @param len 占用字节数      * @return      * @throws      */      private static String intToHexString(int a,int len){          len<<=1;          String hexString = Integer.toHexString(a);          int b = len -hexString.length();          if(b>0){              for(int i=0;i<b;i++)  {                  hexString = "0" + hexString;              }          }          return hexString;      }                  public static void main(String args[]) {          System.out.println(hexString2String("3133383131313536373838"));      }  }
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