在實際的企業開發中，文件上傳是最常見的功能之一，SpringBoot集成了SpringMVC常用的功能，當然也包含了文
件上傳的功能，實現起來沒有太多的區別。
下面我們來講解一下，使用SpringBoot如何實現多個文件上傳操作。使用的環境是IntelliJ IDE開發工具。
開發過程如下：
1.1 配置pom.xml文件
<project>
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>2.0.3.RELEASE/<version>
<relativepath>
<groupid>com.qianfeng.springboot/<groupid>
<artifactid>fileupload/<artifactid>
<version>0.0.1-SNAPSHOT/<version>
<name>fileupload/<name>
<description>Demo project for Spring Boot/<description>
<properties>
<java.version>1.8/<java.version>
<dependencies>
<dependency>
<groupid>org.springframework.boot/<groupid>
<artifactid>spring-boot-starter-web/<artifactid>
<dependency>
<groupid>org.springframework.boot/<groupid>
<artifactid>spring-boot-starter-thymeleaf/<artifactid>
<dependency>
<groupid>org.springframework.boot/<groupid>
<artifactid>spring-boot-starter-test/<artifactid>
<scope>test/<scope>
1.2 application.properties
1.3 Controller類
<build>
<plugins>
<plugin>
<groupid>org.springframework.boot/<groupid>
<artifactid>spring-boot-maven-plugin/<artifactid>
/<project>server.port=8080
package com.qianfeng.springboot.fileupload.controller;
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.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
@Controller
public class UploadFileController {
@RequestMapping("/uploadfile")
public String uploadOneFile(){
return "uploadonefile"; // 最終由ThymeleafView處理，轉發 classpath:templates
}
@RequestMapping("/uploadfiles")
public String uploadMultiFile(){
return "uploadmultifile"; // 最終由ThymeleafView處理，轉發 classpath:templates
}
/**
* 上傳單個文件
* @param file
* @param request
* @return
*/
@RequestMapping(value = "/uploadsimplefile", method = RequestMethod.POST)
@ResponseBody
public String uploadSimpleFile(@RequestParam("attachment") MultipartFile file,
HttpServletRequest request) {
try {
String fileDir =
request.getSession().getServletContext().getRealPath("/upload/");
System.out.println("------->>"+fileDir);
File dir = new File(fileDir);
if (!dir.exists()) {
dir.mkdirs();
}
String fileName = file.getOriginalFilename();
File upload_file = new File(fileDir + fileName);
file.transferTo(upload_file);
} catch (Exception e) {
e.printStackTrace();
return "上傳失敗";
}
return "上傳成功";
}
/**
* 上傳多個文件
* @param file
* @param request
* @return
*/
@RequestMapping(value = "/uploadmultifile", method = RequestMethod.POST)
@ResponseBody
public String uploadMultiFile(@RequestParam("attachment") MultipartFile[] file,
HttpServletRequest request) {
try {
String fileDir =
request.getSession().getServletContext().getRealPath("/upload/");
System.out.println("------->>"+fileDir);
File dir = new File(fileDir);
if (!dir.exists()) {
dir.mkdirs();
}
for (int i=0;i<file.length>
if (file[i]!=null){
uploadFile(fileDir,file[i]);
}
}
} catch (Exception e) {
e.printStackTrace();
return "上傳失敗";
}
return "上傳成功";
}
1.4 單個文件上傳的頁面
/**
*
* @param uploadDir
* @param file
* @throws IOException
*/
public void uploadFile(String uploadDir,MultipartFile file) throws IOException{
String file_name = file.getOriginalFilename();
File upload_file = new File(uploadDir+file_name);
file.transferTo(upload_file);
}
}
/<file.length><title>文件上傳/<title><link>
單個文件上傳
1.5 上傳多個文件頁面
<link>
單個文件上傳
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