使用Spring Boot搭建文件上传服务

一：服务端

pom.xml

<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);
    }
}

二：客户端

客户端使用httpclient调用

先配置maven依赖

<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();
	}
}