版权声明:转载请申明原创地址 https://blog.csdn.net/pw191410147/article/details/80939298
1,配置pom文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.itpengwei</groupId>
<artifactId>springboot-test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springboot-test</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- thymeleaf模板插件 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2,配置文件(application.yml)
server:
port: 8080
spring:
thymeleaf:
cache: false
servlet:
multipart:
max-file-size: 5Mb
max-request-size: 10Mb
3,Controller
package com.itpengwei.springboottest.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
/**
* 文件上传,下载类
*/
@Controller
public class FileUploadController {
/**
* 文件上传
*
* @param file
* @return
*/
@PostMapping(value = "/fileUpload")
@ResponseBody
public String fileUpload(@RequestParam("fileName") MultipartFile file) {
if (file.isEmpty()) {
return "请选择一个文上传";
}
String filename = file.getOriginalFilename();
long fileSize = file.getSize();
System.out.println("文件名称" + filename + "-------文件大小" + fileSize);
String path = "F:/test";
File dest = new File(path + "/" + filename);
if (!dest.getParentFile().exists()) {
//父目录不存在就创建一个
dest.getParentFile().mkdir();
}
//保存文件
try {
file.transferTo(dest);
return "文件上传成功";
} catch (IOException e) {
e.printStackTrace();
return "文件上传失败";
}
}
/**
* 文件下载
*
* @param response
* @return
*/
@RequestMapping(value = "/fileDownload")
@ResponseBody
public String download(HttpServletResponse response) {
String fileName = "Cloud总结.docx";
String filepath = "F:/test";
File file = new File(filepath + "/" + fileName);
byte[] buff = new byte[1024];
BufferedInputStream bis = null;
OutputStream os = null;
try {
os = response.getOutputStream();
bis = new BufferedInputStream(new FileInputStream(file));
int i = bis.read(buff);
while (i != -1) {
os.write(buff, 0, buff.length);
os.flush();
i = bis.read(buff);
}
} catch (IOException e) {
e.printStackTrace();
return "文件上传失败";
} finally {
if (bis != null) {
try {
bis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return "文件上传成功";
}
}