base64编码转图片，图片转base64编码

亲测可用：

代码：

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import java.io.*;

public class Base64Util {

    /*把base64编码转换为图片*/
    public static boolean generateImage(String imgStr, String path) {
        if (imgStr == null)
            return false;
        BASE64Decoder decoder = new BASE64Decoder();
        try {
            byte[] b = decoder.decodeBuffer(imgStr);
            for (int i = 0; i < b.length; i++) {
                if (b[i] < 0) {
                    b[i] += 256;
                }
            }
            OutputStream out = new FileOutputStream(path);
            out.write(b);
            out.flush();
            out.close();
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /*把图片转换为base64编码*/
    public static String getImageStr(String imgFile) {
        InputStream inputStream = null;
        byte[] data = null;
        try {
            inputStream = new FileInputStream(imgFile);
            data = new byte[inputStream.available()];
            inputStream.read(data);
            inputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }
    /*此为以上方法的用法，可以忽略*/
    /*public static void main(String[] args) {
        *//*把图片转换为base64编码*//*
        String strImg = getImageStr("这里传图片的路径:c:/users/图片.png");
        System.out.println(strImg);
        *//*把base64编码转换为图片*//*
        generateImage(strImg,strImg*//*strImg这里是base64编码*//*);
    }*/
}