文件与base64相互转换

r囧r小猫 2023-02-12 15:30 2阅读 0赞

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/水调歌头·明月几时有.pdf");
    		//encodeFileToBase64("E:/附件上传/代码提交的艺术.pdf");
    		//encodeFileToBase64("E:/附件上传/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();
    		}
    		
    		
    	}
    }