Spring Boot如何搭建文件上传服务

<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> 
 <parent> 
  <groupId>org.springframework.boot</groupId> 
  <artifactId>spring-boot-starter-parent</artifactId> 
  <version>1.3.3.RELEASE</version> 
 </parent> 
 
 <groupId>com.test.spring</groupId> 
 <artifactId>spring-boot</artifactId> 
 <version>1.0.0</version> 
 <packaging>jar</packaging> 
 
 <name>spring-boot</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> 
 
 <dependencies> 
  <dependency> 
   <groupId>org.springframework.boot</groupId> 
   <artifactId>spring-boot-starter-web</artifactId> 
  </dependency> 
  <dependency> 
   <groupId>commons-io</groupId> 
   <artifactId>commons-io</artifactId> 
   <version>2.4</version> 
  </dependency> 
 </dependencies> 
 
</project>

package com.test.spring; 
 
import java.io.FileOutputStream; 
import java.io.InputStream; 
import java.io.OutputStream; 
 
import javax.servlet.MultipartConfigElement; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.Part; 
 
import org.apache.commons.io.IOUtils; 
import org.springframework.boot.SpringApplication; 
import org.springframework.boot.autoconfigure.EnableAutoConfiguration; 
import org.springframework.boot.context.embedded.MultipartConfigFactory; 
import org.springframework.context.annotation.Bean; 
import org.springframework.stereotype.Controller; 
import org.springframework.web.bind.annotation.RequestMapping; 
import org.springframework.web.bind.annotation.RequestMethod; 
import org.springframework.web.bind.annotation.ResponseBody; 
 
@Controller 
@EnableAutoConfiguration 
public class FileUploadController 
{ 
 @RequestMapping(value="/upload", method=RequestMethod.POST) 
 @ResponseBody 
 public String upload(HttpServletRequest request) throws Exception 
 { 
  Part part = request.getPart("uploadfile"); 
   
  InputStream input = part.getInputStream(); 
   
  OutputStream output = new FileOutputStream("d:/tmp/" + part.getSubmittedFileName()); 
  IOUtils.copy(input, output); 
   
  output.close(); 
  input.close(); 
   
  return "OK"; 
 } 
 
 @Bean 
 MultipartConfigElement createMultipartConfigElement() 
 { 
  MultipartConfigFactory mcf = new MultipartConfigFactory(); 
  /** 
   * 设置最大上传文件的大小，默认是10MB 
   */ 
  mcf.setMaxFileSize("50MB"); 
  return mcf.createMultipartConfig(); 
 } 
  
 public static void main(String[] args) throws Exception { 
  SpringApplication.run(FileUploadController.class, args); 
 } 
}

<dependency> 
 <groupId>org.apache.httpcomponents</groupId> 
 <artifactId>httpclient</artifactId> 
 <version>4.5.2</version> 
</dependency> 
<dependency> 
 <groupId>org.apache.httpcomponents</groupId> 
 <artifactId>httpmime</artifactId> 
 <version>4.5.2</version> 
</dependency>

package com.test.upload; 
 
import java.io.File; 
 
import org.apache.http.HttpEntity; 
import org.apache.http.client.methods.CloseableHttpResponse; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.entity.mime.MultipartEntityBuilder; 
import org.apache.http.impl.client.CloseableHttpClient; 
import org.apache.http.impl.client.HttpClients; 
import org.apache.http.util.EntityUtils; 
 
public class HttpUpload 
{ 
 public static void main(String[] args)throws Exception 
 { 
  String url = "http://127.0.0.1:8080/upload"; 
  CloseableHttpClient client = HttpClients.createDefault(); 
   
  HttpPost httppost = new HttpPost(url); 
   
  MultipartEntityBuilder builder = MultipartEntityBuilder.create(); 
  builder.addBinaryBody("uploadfile", new File("D:/develop/apache-karaf-3.0.4.zip")); 
   
  HttpEntity reqEntity = builder.build(); 
   
  httppost.setEntity(reqEntity); 
   
  CloseableHttpResponse resp = client.execute(httppost); 
   
  String str = EntityUtils.toString(resp.getEntity()); 
  System.out.println(str); 
   
  resp.close(); 
  client.close(); 
 } 
}