Base64 和image互转

package com.vstsoft.djyw.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import java.io.*;

/**
*

• Base64 和image互转
  */

public class Base64ToImageUtil {
//图片转化成base64字符串
public static String getImageStr(File file) {
//将图片文件转化为字节数组字符串，并对其进行Base64编码处理
InputStream in = null;
byte[] data = null;
//读取图片字节数组
try {
in = new FileInputStream(file);
data = new byte[in.available()];
in.read(data);
in.close();
} catch (IOException e) {
e.printStackTrace();
}
//对字节数组Base64编码
BASE64Encoder encoder = new BASE64Encoder();
return encoder.encode(data);//返回Base64编码过的字节数组字符串
}

static Logger logger = LoggerFactory.getLogger(Base64ToImageUtil.class);

//base64字符串转化成图片
public static String generateImage(String imgStr, String path, String name) {   //对字节数组字符串进行Base64解码并生成图片
    if (imgStr == null) //图像数据为空
        return null;
    BASE64Decoder decoder = new BASE64Decoder();
    try {
        //Base64解码
        byte[] b = decoder.decodeBuffer(imgStr);
        for (int i = 0; i < b.length; ++i) {
            if (b[i] < 0) {//调整异常数据
                b[i] += 256;
            }
        }
        //生成jpeg图片
        String imgName = name + ".jpg";
        String imgFilePath = path+"/" + imgName;//新生成的图片
        OutputStream out = new FileOutputStream(imgFilePath);
        out.write(b);
        out.flush();
        out.close();

        return imgFilePath;
    } catch (Exception e) {
        e.printStackTrace();
        return "";
    }
}

}