SpringBoot上传文件

1.pom文件

<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.company</groupId>
    <artifactId>uploaddemo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>uploaddemo</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath />
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

2.Springboot项目 

2.1 application.properties

server.port=8000

spring.http.multipart.maxFileSize=10Mb  

spring.http.multipart.maxRequestSize=10Mb

2.2 App.java

package com.company.uploaddemo;

import org.springframework.boot.Banner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * Hello world!
 *
 */
@SpringBootApplication
public class App {
    public static void main(String[] args) {
        SpringApplication app = new SpringApplication(App.class);
        // 关闭banner
        app.setBannerMode(Banner.Mode.OFF);
        app.run(args);
    }
}

2.3 Controller

package com.company.uploaddemo;

import java.io.File;
import java.io.IOException;

import org.springframework.util.FileCopyUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

@RestController
public class FileUploadController {

    /**
     * 上传文件 测试方法： 测试接口：http://localhost:8000/upload 使用PostMan测试
     *
     * @param file 待上传文件
     * @return
     */
    @RequestMapping(value = "/upload", method = RequestMethod.POST)
    @ResponseBody
    public String handleFileUpload(@RequestParam(value = "file", required = true) MultipartFile file) {
        File fileToSave = null;
        if (!file.isEmpty()) {
            try {
                byte[] bytes = file.getBytes();
                // fileToSave = new File(file.getOriginalFilename());
                fileToSave = new File("C:\" + file.getOriginalFilename());
                // 自定义存储路径
                FileCopyUtils.copy(bytes, fileToSave);
            } catch (IOException e) {
                e.printStackTrace();
                return "上传失败," + e.getMessage();
            }
            return "上传成功" + fileToSave.getAbsolutePath();
        } else {
            return "上传失败，因为文件是空的.";
        }
    }

}