图片和十六进制字符串转换

 package com.example.demo.util;

    
  
    
 import java.io.BufferedInputStream;
    
 import java.io.FileInputStream;
    
 import java.io.FileWriter;
    
 import java.io.IOException;
    
 import java.io.PrintWriter;
    
  
    
 /** * 图片转成十六进制
    
  * * @author Administrator
    
  */
    
 public class ImageToHex {
    
     public static void main(String[] args) throws Exception {
    
     try {
    
         StringBuffer sb = new StringBuffer();
    
         FileInputStream fis = new FileInputStream("e:/456.png");
    
         BufferedInputStream bis = ne