SpringBoot文件的上传与下载

⒈文件实体类

package cn.coreqi.security.entities;

public class FileInfo {

    private String path;

    public FileInfo(String path) {
        this.path = path;
    }

    public String getPath() {
        return path;
    }

    public void setPath(String path) {
        this.path = path;
    }
}

⒉控制器代码

package cn.coreqi.security.controller;

import cn.coreqi.security.entities.FileInfo;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.Date;

@RestController
public class FileController {

    @PostMapping("/file")
    public FileInfo upload(MultipartFile file) throws IOException {
        System.out.println(file.getName()); //文件名
        System.out.println(file.getOriginalFilename()); //原始文件名
        String folder = "d:/test";
        File localFile = new File(folder,new Date().getTime() + ".txt");
        file.transferTo(localFile); //将上传的文件写入到本地的文件中
        return new FileInfo(localFile.getAbsolutePath());   //绝对路径
    }

    @GetMapping("/file/{id}")
    public void download(@PathVariable String id, HttpServletRequest request, HttpServletResponse response){
        try(
                InputStream inputStream = new FileInputStream(new File("d:/test/1553692860875.txt"));
                OutputStream outputStream = response.getOutputStream();
                ) {
            response.setContentType("application/x-download");
            response.addHeader("Content-Disposition","attachment;filename=test.txt");
            IOUtils.copy(inputStream,outputStream);
            outputStream.flush();

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

⒊测试

    /**
     * 上传文件测试
     */
    @Test
    public void whenUploadSuccess() throws Exception {
        //mockMvc.perform(MockMvcRequestBuilders.fileUpload("/file")
        String result = mockMvc.perform(MockMvcRequestBuilders.multipart("/file")
                .file(new MockMultipartFile("file","test.txt","multipart/form-data","hello upload".getBytes("UTF-8"))))
                .andExpect(status().isOk())
                .andReturn().getResponse().getContentAsString();
        System.out.println(result);
    }