springboot简易上传下载

1.导入上传下载依赖：

　　　　　<dependency>

            <groupId>commons-fileupload</groupId>

            <artifactId>commons-fileupload</artifactId>

            <version>1.3.2</version>

        </dependency>

        <dependency>

            <groupId>commons-io</groupId>

            <artifactId>commons-io</artifactId>

            <version>2.4</version>

        </dependency>
　　　　<!-- 添加thymeleaf --> 
　　　　　<dependency> 
　　　　　　　<groupId>org.springframework.boot</groupId> 
　　　　　　　<artifactId>spring-boot-starter-thymeleaf</artifactId> 
　　　　　</dependency>

2.上传：

1）前端页面：

<!DOCTYPE html>

<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

    <script>

        function exproExcel() {

        }

    </script>

</head>

<body>

    <h1>Spring Boot</h1>

    <a href="/Expro/excel">导出</a>

    <p th:text="${hello}"></p>

    <p>文件上传</p>

    <form action="/upload/file" method="post" enctype="multipart/form-data">

        上传：<input type="file" name="upfile"/>

        <button type="submit">提交</button>

    </form>

</body>

</html>

2）编写跳到上传页面接口：

@Controller

public class HelloController {

    @RequestMapping("/hello")

    public String helloIndex(HashMap<String, Object> map){

        map.put("hello","Hello SpringBoot!");

        return "/index";

    }

}

3）编写接收上传文件接口：

@Controller

@RequestMapping("/upload")

public class UploadFileController {

    @RequestMapping(value = "/file")

    public @ResponseBody String uploadFile(@RequestParam("upfile") MultipartFile file, HttpServletRequest request){

        String message ="";

        try {

            if(!file.isEmpty()){

                FileOutputStream outputStream = new FileOutputStream("F:\\XIAOYAO"+"\\"+file.getOriginalFilename());

                outputStream.write(file.getBytes());

                outputStream.flush();

                outputStream.close();

                message="上传成功！";

            }

        } catch (UnsupportedEncodingException e) {

            e.printStackTrace();

            message="上传失败！";

        } catch (IOException e) {

            e.printStackTrace();

            message="上传失败！";

        }

            return message;

    }

}

3.下载：

1）编写下载接口：

@RestController

@RequestMapping("/Expro")

public class ExprotExcelController {

    @RequestMapping("/excel")

    public void exproExcel(HttpServletRequest request, HttpServletResponse response) throws Exception{

        String path =  ClassLoader.getSystemResource("").toURI().getPath(); //获取类加载地址

        System.out.println(path);

        File file = new File(path+"excelTempalte/模板.xlsx");

        FileInputStream fileInputStream = new FileInputStream(file); //读取文件

        response.setHeader("Content-disposition", "attachment;filename=test.xlsx"); //设置响应头和文件名字

        OutputStream outputStream = response.getOutputStream();

        //创建缓存区

        byte [] buffe = new byte[1024];

        int len =0;

        while ((len =fileInputStream.read(buffe))>0){

            outputStream.write(buffe,0,len);

        }

        fileInputStream.close();

        outputStream.flush();

        outputStream.close();

    }

}

巴特西

springboot简易上传下载

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