//文件转换成Base64编码
public static String getFileBase64Str(String filePath) throws IOException {
String filePath = System.getProperty("user.dir") + "//src//test//resources//idcard//" + fileName;
System.out.println("测试文件：" + filePath);
File file = new File(filePath);
byte[] front = org.apache.commons.io.FileUtils.readFileToByteArray(file);
return Base64.getEncoder().encodeToString(front);
}
/ 注意Base64字符串不要有空格和回车
public static void main(String[] args) {
String strImg = GetImageStr();
System.out.println(strImg);
GenerateImage(strImg);
}
//图片转化成base64字符串
public static String GetImageStr() {//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
String imgFile = "C:\\Users\\18285\\Desktop\\22.jpg";//待处理的图片
InputStream in = null;
byte[] data = null;
//读取图片字节数组
try {
in = new FileInputStream(imgFile);
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
}
//base64字符串转化成图片
public static boolean GenerateImage(String imgStr) { //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 false;
BASE64Decoder decoder = new BASE64Decoder();
try {
byte[] b = Base64Utils.decode(imgStr.getBytes());
//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 imgFilePath = "C:\\Users\\18285\\Desktop\\new.jpg";//新生成的图片
OutputStream out = new FileOutputStream(imgFilePath);
out.write(b);
out.flush();
out.close();
return true;
} catch (Exception e) {
return false;
}
}