SpringBoot 上传附件

一：用idea 创建 springboot 项目：

详情请参考：《使用IDEA创建一个springboot项目》

二：具体代码内容：

1：代码结构

FileUploadController

package com.alancode.springboot.controller;
/**
 * @author Alan_liu
 * @Create 2021/2/16 15:51
 */

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

/**
 * @program: SpringBootAddFileUpload
 *@description: SpringBoot 文件上传
 *@author: Alan_Liu
 *@create: 2021-02-16 15:51
 */
@RestController   /***使用该注解：表示该使用的java类下的所有的方法返回值都默认做jason转换;其作用相当于@Controller+@ResponseBody ****/
public class FileUploadController {

	 /**
	  *处理附件上传
	  *
	  *@Param: `
	  *@return
	  *@throws
	  *@author Alan_Liu
	  *@date   2021/2/16 15:56
	  *
	  **/
	 @RequestMapping("/fileUploadController")
	 public Map<String,Object> fileUpload(MultipartFile filename) throws IOException {
		 System.out.println(filename.getOriginalFilename());
	     filename.transferTo(new File("F:/SoftCode/Idea202103_WorkSpace/SpringBootAddFileUpload/src/main/resources/static/UpLoadFile/"+filename.getOriginalFilename()));
         Map<String,Object> map=new HashMap<String,Object>();
         map.put("msg","ok");
         return map;
	 }




}

DemoApplication

package com.alancode.springboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.MultipartConfigFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.util.unit.DataSize;

import javax.servlet.MultipartConfigElement;

/**
 * @author Alan_Liu
 */
@SpringBootApplication
public class DemoApplication {

	public static void main(String[] args) {
		SpringApplication.run(DemoApplication.class, args);
	}

	 //@Configuration
	@Bean
	public MultipartConfigElement multipartConfigElement() {
		MultipartConfigFactory factory = new MultipartConfigFactory();
		//单个文件最大
		factory.setMaxFileSize(DataSize.parse("1024MB")); //KB,MB
		//设置总上传数据总大小
		factory.setMaxRequestSize(DataSize.parse("1024MB"));
		return factory.createMultipartConfig();
	}
}

ServletInitializer

package com.alancode.springboot;

import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;

public class ServletInitializer extends SpringBootServletInitializer {

	@Override
	protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
		return application.sources(DemoApplication.class);
	}

}

Upload.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>springboot 文件上传</title>
</head>
<body>
<form   action="fileUploadController" method="post" enctype="multipart/form-data" value="107341824000">>
    上传文件：<input type="file" name="filename" /><input type="submit">

</form>
</body>
</html>

application.properties

spring.http.multipart.maxFileSize = -1
spring.http.multipart.maxRequestSize=-1

pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.2</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.alanCode.springBoot</groupId>
    <artifactId>SpringBootAddFileUpload</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>demo</name>
    <description>springboot 上传附件</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </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>