java图片与base64字符串之间的转换

时间:2022-06-11 21:49:12
public static void main(String[] args) {
String imgPath = "G:/Photos/1.jpg";

String basePath = GetImageStr(imgPath);

System.out.println(GenerateImage(basePath));

}

/**
* 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 imgFilePath
* @return
*/
public static String GetImageStr(String imgFilePath) {
byte[] data = null;
// 读取图片字节数组
try {
InputStream in = new FileInputStream(imgFilePath);
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();
// 返回Base64编码过的字节数组字符串
return encoder.encode(data);
}

/**
* 对字节数组字符串进行Base64解码并生成图片
*
* @param imgStr
* @param filePath
* @param fileName
* @return
*/
public static boolean GenerateImage(String imgStr) {
if (imgStr == null) { // 图像数据为空
return false;
}
BASE64Decoder decoder = new BASE64Decoder();
try {

String newFileName = UUID.randomUUID().toString() + ".jpg";
File file = new File("G:/", newFileName);
// Base64解码
byte[] bytes = decoder.decodeBuffer(imgStr);
for (int i = 0; i < bytes.length; ++i) {
if (bytes[i] < 0) {// 调整异常数据
bytes[i] += 256;
}
}
// FileUtils.writeByteArrayToFile(file, bytes);
Base64Decoder.GenerateImage(imgStr, "G:/" + newFileName);
return true;
} catch (Exception e) {
return false;
}
}