udi-wms-java/src/main/java/com/glxp/api/upload/DownloadController.java

package com.glxp.api.upload;

import com.glxp.api.constant.FileConstant;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;

@RestController
public class DownloadController {

    @Value("${file_path}")
    private String filePath;

    @GetMapping(value = "/udiwms/image/register/file/getImage")
    public void getImage(HttpServletResponse response
            , @RequestParam String type
            , @RequestParam String name) throws IOException {

        if (name.endsWith("pdf") || name.endsWith("doc")) {
            OutputStream os = null;
            try {
                FileInputStream input = new FileInputStream(new File(filePath + FileConstant.COMMON_FILE_PATH  + name));
                OutputStream out = response.getOutputStream();
                byte[] b = new byte[2048];
                int len;
                while ((len = input.read(b)) != -1) {
                    out.write(b, 0, len);
                }
                input.close();
            } catch (IOException e) {

            } finally {
                if (os != null) {
                    os.flush();
                    os.close();
                }
            }
        } else {
            OutputStream os = null;
            try {
                // 读取图片
                BufferedImage image = ImageIO.read(
                        new FileInputStream(new File(filePath + "/register/" + type + "/" + name)));
                response.setContentType("image/png");
                os = response.getOutputStream();

                if (image != null) {
                    ImageIO.write(image, "png", os);
                }
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                if (os != null) {
                    os.flush();
                    os.close();
                }
            }
        }


    }

    @GetMapping(value = "/udiwms/donwload/file")
    public void download(HttpServletResponse response,
                         @RequestParam String fileName) throws IOException {
        OutputStream os = null;
        try {
            FileInputStream input = new FileInputStream(new File(filePath + "/pdf/template/"+fileName));
            OutputStream out = response.getOutputStream();
            byte[] b = new byte[2048];
            int len;
            while ((len = input.read(b)) != -1) {
                out.write(b, 0, len);
            }
            input.close();
        } catch (IOException e) {

        } finally {
            if (os != null) {
                os.flush();
                os.close();
            }
        }
    }

    @GetMapping(value = "/udiwms/donwload/printFile")
    public void printFile(HttpServletResponse response, @RequestParam String fileName) throws IOException {
        String url = filePath + "pdf/template/" + fileName;
        OutputStream os = null;
        try {
            FileInputStream input = new FileInputStream(new File(url));
            OutputStream out = response.getOutputStream();
            byte[] b = new byte[2048];
            int len;
            while ((len = input.read(b)) != -1) {
                out.write(b, 0, len);
            }
            input.close();
        } catch (IOException e) {

        } finally {
            if (os != null) {
                os.flush();
                os.close();
            }
        }
    }
}