Spring Boot搭建文件上传服务的方法

本文实例为大家分享了Spring Boot搭建文件上传服务的具体代码，供大家参考，具体内容如下

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); 
  } 
} 

注意：spring-boot-starter-web 1.3.3.RELEASE 依赖的servlet是3.1

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> 

测试代码

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(); 
  } 
} 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程小技巧。

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