通过java编程得到.jpg图片16进制的数据

import java.io.BufferedInputStream; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; public class ImageToHex { public static void main(String[] args) throws IOException { FileInputStream image = new FileInputStream("C:\\Users\\曹红英\\Desktop\\chy.jpg"); java.io.ByteArrayOutputStream bos = new java.io.ByteArrayOutputStream(); byte[] buff = new byte[1024]; int len = 0; while((len = image.read(buff)) != -1) { bos.write(buff, 0, len); } //得到图片的字节数组 byte[] result = bos.toByteArray(); //字节数组转成十六进制 System.out.println(result); String str=byte2HexStr(result); /* * 将十六进制串保存到txt文件中 */ PrintWriter outdata = new PrintWriter(new FileWriter("C:\\Users\\曹红英\\Desktop\\testdata.txt")); outdata.println(str); outdata.close(); System.out.println("testdata.txt写入成功！"); } /* * 实现字节数组向十六进制的转换方法 */ public static String byte2HexStr(byte[] b) { String hs=""; String stmp=""; String halt="\t"; System.out.println(b.length); for (int n=0;n<b.length;n++) { stmp=(Integer.toHexString(b[n] & 0XFF)); if (stmp.length()==1) hs=hs+"0"+stmp+halt; else hs=hs+stmp+halt; } return hs.toUpperCase(); //转换成大写 } }