文件與base64相互轉換

 

package com.idata.ground.controller.org;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.commons.codec.binary.Base64;




public class Test {

	public static void main(String[] args) {
		//encodeFileToBase64("E:/Desktop/水調歌頭·明月幾時有.pdf");
		//encodeFileToBase64("E:/附件上傳/代碼提交的藝術.pdf");
		//encodeFileToBase64("E:/附件上傳/dog.mp4");
		String base64 = null;
		try {
			File file = new File("E:/Desktop/test.txt");
			FileInputStream fis = new FileInputStream(file);
			byte[] byte64 = new byte[(int) file.length()];
			fis.read(byte64);
			base64 = new String(byte64);
			System.out.println(base64);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		decodeBase64ToFile("E:/Desktop/test.mp4", base64);
	}

	public static void encodeFileToBase64(String filePath){
		try {
			File file = new File(filePath);
			FileInputStream fis = new FileInputStream(file);
			byte[] byte64 = new byte[(int)file.length()];
			fis.read(byte64);
			fis.close();
			byte[] temp = Base64.encodeBase64(byte64);
			System.out.println(new String(temp));
			System.out.println("------------------------------");
			File file64 = new File("E:/Desktop/test.txt");
			FileOutputStream fos = new FileOutputStream(file64);
			fos.write(temp);
			fos.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	public static void decodeBase64ToFile(String filePath, String base64){
		try {
			File file = new File(filePath);
			FileOutputStream fos = new FileOutputStream(file);
			byte[] byte64 = Base64.decodeBase64(base64);
			fos.write(byte64);
			fos.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		
	}
}