圖片轉base64使用JSON傳輸

要傳輸的JSON格式：

{
    "orderId":"0001",
    "cargoReceiptNo":"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",
    "cargoReceiptLineNo":"000009_01"
}

後臺代碼：

@RequestMapping(value = {"/photoJson"})
    @ResponseBody
    public PhysicalIdCheckDto testPhotoJson(@RequestBody PhysicalIdCheckDto physicalIdCheckDto) {
        String imgStr = physicalIdCheckDto.getCargoReceiptNo();
        
        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("E:\\img\\logo.jpg");
            out.write(b);
        out.flush();
        out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println("輸出JSON："+physicalIdCheckDto);
        return physicalIdCheckDto;
    }
    

base64轉圖片

/**
 * @Description: 將base64編碼字符串轉換爲圖片
 * @Author: 
 * @CreateTime: 
 * @param imgStr base64編碼字符串
 * @param path 圖片路徑-具體到文件
 * @return
*/
public static boolean generateImage(String imgStr, String path) {
　　if (imgStr == null)
　　　　return false;
　　BASE64Decoder decoder = new BASE64Decoder();
　　try {
　　　　// 解密
　　　　byte[] b = decoder.decodeBuffer(imgStr);
　　　　// 處理數據
　　　　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) {
　　　　return false;
　　}
}

圖片轉base64

/**
 * @Description: 根據圖片地址轉換爲base64編碼字符串
 * @Author: 
 * @CreateTime: 
 * @return
 */
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();
    }
    // 加密
    BASE64Encoder encoder = new BASE64Encoder();
    return encoder.encode(data);
}

測試：

/**
 * 示例
 */
public static void main(String[] args) {
    String strImg = getImageStr("F:/86619-106.jpg");
    System.out.println(strImg);
    generateImage(strImg, "F:/86619-107.jpg");
}