java中十六进制和ASCII码互相转换。

package com.test;

public class StringToHex{

	  public String convertStringToHex(String str){

	  char[] chars = str.toCharArray();

	  StringBuffer hex = new StringBuffer();
	  for(int i = 0; i < chars.length; i++){
	    hex.append(Integer.toHexString((int)chars[i]));
	  }

	  return hex.toString();
	  }

	  public String convertHexToString(String hex){

	  StringBuilder sb = new StringBuilder();
	  StringBuilder temp = new StringBuilder();

	  //49204c6f7665204a617661 split into two characters 49, 20, 4c...
	  for( int i=0; i