Java针对MultipartFile上传图片获取宽、高

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package com.example.demo.com;


import org.apache.commons.io.FileUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import org.summercool.image.JImage;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;

@RestController
public class img {
    private static final int BUFFER_SIZE = 8192;

    @RequestMapping(value = "/uploadImg", method = RequestMethod.POST, produces = "text/html;charset=UTF-8")
    public String upload(@RequestParam(value = "file", required = true) MultipartFile file) {
        System.out.println(file.getContentType());
        System.out.println(file.getName());
        System.out.println(file.getOriginalFilename());
        getImg(file);
        getImg1(file);
        return "hello";
    }

    private void getImg(@RequestParam(value = "file", required = true) MultipartFile file) {
        try {
            BufferedImage image = ImageIO.read(file.getInputStream());
            System.out.println(image);
            if (image != null) {
                System.out.println(image.getWidth());
                System.out.println(image.getHeight());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private void getImg1(@RequestParam(value = "file", required = true) MultipartFile file) {
        String fileName = file.getOriginalFilename();
        try {
            String prefix=fileName.substring(fileName.lastIndexOf("."));
            File temporaryFile = File.createTempFile(prefix,String.valueOf(System.currentTimeMillis()));
            FileUtils.copyInputStreamToFile(file.getInputStream(), temporaryFile);
            BufferedImage m = ImageIO.read(temporaryFile);
            if (m != null) {
                System.out.println(m.getWidth());
                System.out.println(m.getHeight());
            }
        } catch (Exception e) {
            // 省略异常操作
        }
    }

    private void getImg2(@RequestParam(value = "file", required = true) MultipartFile file) {
        try {
            InputStream inputStream = file.getInputStream();
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            byte[] bytes = copy(inputStream, out);
            JImage jImage = JImageUtils.make(bytes, JImageFormat.AUTO, 0, 0, 0);
            if (jImage != null) {
                jImage.getWidth();
                jImage.getHeight();
            }
        }catch (Exception e){

        }

    }


    private byte[] copy(InputStream source, ByteArrayOutputStream out)
            throws IOException {
        byte[] buf = new byte[BUFFER_SIZE];
        int n;
        while ((n = source.read(buf)) > 0) {
            out.write(buf, 0, n);
        }
        return out.toByteArray();
    }





}

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