字节流、字符串、16进制字符串转换__java

package com.dvn.li.main;

/**
* @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"));
}
}