java 文件转十六进制,JAVA IO - 将文件内容转化为十六进制显示

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.PrintStream;

public class ToHexTest {

public static void convertToHex(PrintStream out, File file) throws IOException {

InputStream is = new FileInputStream(file);

int bytesCounter =0;

int value = 0;

StringBuilder sbHex = new StringBuilder();

StringBuilder sbText = new StringBuilder();

StringBuilder sbResult = new StringBuilder();

while ((value = is.read()) != -1) {

//convert to hex value with "X" formatter

sbHex.append(String.format("%02X ", value));

//If the chracater is not convertable, just print a dot symbol "."

if (!Character.isISOControl(value)) {

sbText.append((char)value);

}else {

sbText.append(".");

}

//if 16 bytes are read, reset the counter,

//clear the StringBuilder for formatting purpose only.

if(bytesCounter==15){

sbResult.append(sbHex).append(" ").append(sbText).append("\n");

sbHex.setLength(0);

sbText.setLength(0);

bytesCounter=0;

}else{

bytesCounter++;

}

}

//if still got content

if(bytesCounter!=0){

//add spaces more formatting purpose only

for(; bytesCounter<16; bytesCounter++){

//1 character 3 spaces

sbHex.append(" ");

}

sbResult.append(sbHex).append(" ").append(sbText).append("\n");

}

out.print(sbResult);

is.close();

}

public static void main(String[] args) throws IOException

{

//display output to console

convertToHex(System.out, new File("c:/work/hello/helloworld"));

//write the output into a file

convertToHex(new PrintStream("c:/work/hello/helloworld.hex"), new File("c:/work/hello/helloworld"));

}

}