睿虎的博客

Posted on In , , Waline:

按照以下的步骤创建项目：

然后在 application.properties 文件中写入以下内容：

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spring.thymeleaf.prefix=classpath:/templates/
server.port=8010


spring.servlet.multipart.max-file-size=100MB
spring.servlet.multipart.max-request-size=1000MB



spring.datasource.url=jdbc:mysql://127.0.0.1:3306/paper?characterEncoding=utf-8&useSSL=false
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=yourpassword



mybatis.mapper-locations=classpath:mapper/*.xml
mybatis.configuration.map-underscore-to-camel-case=true

最后创建相关目录：

Posted on In , , Waline:

下面是用SpringBoot完成文件下载的代码：

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@Controller
@RequestMapping("/download")
public class DownloadController {

    @ResponseBody
    @RequestMapping("/download")
    public String fileDownLoad(HttpServletResponse response, @RequestParam("fileName") String fileName){
        String downloadFilePath="D:\\laiscdata";
        File file = new File(downloadFilePath +'\\'+ fileName);
        if(!file.exists()){
            return "下载文件不存在";
        }
        response.reset();
        response.setContentType("application/octet-stream");
        response.setCharacterEncoding("utf-8");
        response.setContentLength((int) file.length());
        response.setHeader("Content-Disposition", "attachment;filename=" + fileName );

        try(BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));) {
            byte[] buff = new byte[1024];
            OutputStream os  = response.getOutputStream();
            int i = 0;
            while ((i = bis.read(buff)) != -1) {
                os.write(buff, 0, i);
                os.flush();
            }
        } catch (IOException e) {
            System.out.println("程序错误："+e);
            return "下载失败";
        }
        return "下载成功";
    }
}

测试：访问http://localhost:8088/download/download?fileName=1.zip

Posted on In , , Waline:

下面是用SpringBoot完成文件上传的代码：

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@Controller
@RequestMapping("/upload")
public class UploadController {

    @ResponseBody
    @RequestMapping("/upload")
    public String httpUpload(@RequestParam("files") MultipartFile files[]){
        String uploadFilePath="D:\\laiscdata";
        JSONObject object=new JSONObject();
        for(int i=0;i<files.length;i++){
            String fileName = files[i].getOriginalFilename();  // 文件名
            File dest = new File(uploadFilePath +'\\'+ fileName);
            if (!dest.getParentFile().exists()) {
                dest.getParentFile().mkdirs();
            }
            try {
                files[i].transferTo(dest);
            } catch (Exception e) {
                System.out.println("程序错误："+e);
                object.put("success",2);
                object.put("result","程序错误，请重新上传");
                return object.toString();
            }
        }
        object.put("success",1);
        object.put("result","文件上传成功");
        return object.toString();
    }

}

上面的代码看起来有点多，其实就是一个上传的方法，首先通过 MultipartFile 接收文件。这里我用的是file[] 数组接收文件，这是为了兼容多文件上传的情况，如果只用file 接收，然后在接口上传多个文件的话，只会接收最后一个文件。这里大家注意一下。看自己的需求，我这里兼容多文件所以用数组接收。

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