Java Base64图片加密解密源码注解

需要导入的包

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

参数介绍

static BASE64Encoder encoder = new sun.misc.BASE64Encoder();   //加密
static BASE64Decoder decoder = new sun.misc.BASE64Decoder();   //解密

主要方法

private  static String getImageBinary(File f){

BufferedImage bi;
try {
bi = ImageIO.read(f);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(bi, "jpg", baos);
byte[] bytes = baos.toByteArray();

return encoder.encodeBuffer(bytes).trim();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}

private   static File base64StringToImage(String base64String){
try {
byte[] bytes1 = decoder.decodeBuffer(base64String);
ByteArrayInputStream bais = new ByteArrayInputStream(bytes1);
BufferedImage bi1 =ImageIO.read(bais);
File w2 = new File("D://ok.png");//可以是jpg,png,gif格式
ImageIO.write(bi1, "jpg", w2);//不管输出什么格式图片，此处不需改动
return w2;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}

测试

public static void main(String[] args) {
System.out.println(getImageBinary(new File("D://flyStar.jpg")));

base64StringToImage(getImageBinary(new File("D://flyStar.jpg")));

}