stringutil.java

短信开发用于文件交换处理转发的类模块

package com.pub.util;

public class StringUtil {
	public StringUtil() {
	}

	public static String getUTF8Text(String s) {
		String ret = "";
		try {
			byte[] utf8 = s.getBytes("UTF8");
			ret = bytesToHexStr(utf8).toUpperCase();
		} catch (Exception e) {
		}
		return ret;
	}

	private static String bytesToHexStr(byte[] arr) {
		return bytes2hexStr(arr, arr.length);
	}

	private static final char[] hex = { '0', '1', '2', '3', '4', '5', '6', '7',
			'8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };

	private static String bytes2hexStr(byte[] arr, int len) {
		StringBuffer sb = new StringBuffer(len * 2);
		for (int i = 0; i < len; i++) {
			int hi = (arr[i] >>> 4) & 0xf;
			sb.append(hex[hi]);
			int low = (arr[i]) & 0xf;
			sb.append(hex[low]);
		}
		return sb.toString();
	}
	
	  private static final String HEXINDEX = "0123456789abcdef          ABCDEF";
	  public static byte[] hexToByte(String s) {
	          int  l = s.length() / 2;
	          byte data[] = new byte[l];
	          int  j = 0;
	          for (int i = 0; i < l; i++) {
	              char c = s.charAt(j++);
	              int  n, b;
	              n = HEXINDEX.indexOf(c) ;
	              b = (n & 0xf) << 4;
	              c = s.charAt(j++);
	              n = HEXINDEX.indexOf(c) ;
	              b += (n & 0xf);
	              data[i] = (byte) b;
	          }
	          return data;
	  }		
	
}