1
2

//获取到InputStream
InputStream inputStream = WxaQrcodeApi.get(code);

1
2
3

BufferedImage read = ImageIO.read(inputStream);
ImageIO.write(read, "png", getResponse.getOutputStream());
renderNull();

1
2
3

BASE64Encoder base64Encoder = new BASE64Encoder();
base64Encoder.encode(inputStream, getResponse().getOutputStream());
renderNull();

1
2
3
4
5
6
7
8
9

//创建一个输出流
ByteArrayOutputStream baos = new ByteArrayOutputStream();
//读取返回的
BufferedImage read = ImageIO.read(inputStream);
//写入到创建的输出流
ImageIO.write(read, "png", baos);*/
//转换输出流为base64
String encode = Base64Kit.encode(baos.toByteArray());
renderText(encode);