import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import java.io.*;
/**
* @Author ZhengQinfeng
* @Date 2020/6/18 21:31
* @dec
*/
public class ImageBase64 {
/**
* 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
*
* @param imgPath 图片文件
* @return base64转码字符串
*/
public static String GetImageStr(String imgPath) {//
String imgFile = imgPath;// 待处理的图片
InputStream in = null;
byte[] data = null;
String encode = null; // 返回Base64编码过的字节数组字符串
// 对字节数组Base64编码
BASE64Encoder encoder = new BASE64Encoder();
try {
// 读取图片字节数组
in = new FileInputStream(imgFile);
data = new byte[in.available()];
in.read(data);
encode = encoder.encode(data);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return encode;
}
/**
* 对字节数组字符串进行Base64解码并生成图片.
* 使用前端框vant上传图片,转码成base64之后, 需要截取掉"data:image/jpeg;base64,", 不然会失败
*
* @param imgData base64字符串
* @param imgFilePath 生成的图片文件
*/
public static void GenerateImage(String imgData, String imgFilePath) { //
if (imgData == null) {// // 图像数据为空
return;
}
BASE64Decoder decoder = new BASE64Decoder();
OutputStream out = null;
try {
out = new FileOutputStream(imgFilePath);
// Base64解码
byte[] b = decoder.decodeBuffer(imgData);
for (int i = 0; i < b.length; ++i) {
if (b[i] < 0) {// 调整异常数据
b[i] += 256;
}
}
out.write(b);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
out.flush();
} catch (IOException e) {
e.printStackTrace();
}
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) throws IOException {
String s = GetImageStr("D:\\app\\image\\180817_37bdi0ji0j6bc58jb3j616b71l1dj_640x960.jpg");
System.out.println(s);
GenerateImage(s, "D:\\app\\image\\1111.jpg");
}
}
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