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一、写在前面
- 环境介绍
【IDE】IDEA14
【JDk】1.8
【SpringBoot】1.5.3-RELEASE
- 本文摘要
a. SpringBoot所选组件:Web 和 ThymeLeaf ;
b. 两个模板:单文件上传与多文件上传;
c. 在配置类中配置文件上传大小的限制。
二、走入正题
- 创建Maven项目
a. 打开 IDEA,选择 Create New Project (New -> project);
b. 选择 Maven,选择 JDK1.8,不勾选 archetype,直接 Next ;
c. 填写 groupId:com.yale ,artifactId:SpringBootFile ;
d. 填写 ProjectName :SpringBootFile ;
e. 点击 Finish,Over!
- 修改POM文件
<?xml version="1.0" encoding="UTF-8"?>
<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.yale</groupId>
<artifactId>SpringBootFile</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>SpringBootFile</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.3.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- thymeleaf模板插件 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<!-- devtools插件,热部署 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
<scope>true</scope>
</dependency>
</dependencies>
</project>
右击项目,选择 Maven -> reimport ,导入依赖!
- 创建Application.java与application.yml
在java目录下新建package:com.yale,再yale下新建Application.java
package com.yale;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.MultipartConfigFactory;
import org.springframework.context.annotation.Bean;
import javax.servlet.MultipartConfigElement;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class,args);
}
@Bean
public MultipartConfigElement multipartConfigElement() {
MultipartConfigFactory factory = new MultipartConfigFactory();
//单个文件最大
factory.setMaxFileSize("80MB"); //KB,MB
/// 设置总上传数据总大小
factory.setMaxRequestSize("102400KB");
return factory.createMultipartConfig();
}
}
在resources目录下创建application.yml
spring:
thymeleaf:
cache: false
- 创建Controller
在com.yale包下,再创建一个controller包, 在controller下创建FileUploadController.java
package com.yale.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 org.springframework.web.multipart.MultipartHttpServletRequest;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.util.List;
@Controller
public class FileUploadController {
/*
* 获取file.html页面
*/
@RequestMapping("file")
public String file(){
return "/file";
}
/**
* 实现文件上传
* */
@RequestMapping("fileUpload")
@ResponseBody
public String fileUpload(@RequestParam("fileName") MultipartFile file){
if(file.isEmpty()){
return "false";
}
String fileName = file.getOriginalFilename();
int size = (int) file.getSize();
System.out.println(fileName + "-->" + size);
String path = "D:\\test_dir\\upload" ;
File dest = new File(path + "/" + fileName);
if(!dest.getParentFile().exists()){ //判断文件父目录是否存在
dest.getParentFile().mkdir();
}
try {
file.transferTo(dest); //保存文件
return "true";
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "false";
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "false";
}
}
/*
* 获取multifile.html页面
*/
@RequestMapping("multifile")
public String multifile(){
return "/multifile";
}
/**
* 实现多文件上传
* */
@RequestMapping(value="multifileUpload",method= RequestMethod.POST)
public @ResponseBody String multifileUpload(HttpServletRequest request){
List<MultipartFile> files = ((MultipartHttpServletRequest)request).getFiles("fileName");
if(files.isEmpty()){
return "false";
}
String path = "D:\\test_dir\\upload" ;
for(MultipartFile file:files){
String fileName = file.getOriginalFilename();
int size = (int) file.getSize();
System.out.println(fileName + "-->" + size);
if(file.isEmpty()){
return "false";
}else{
File dest = new File(path + "/" + fileName);
if(!dest.getParentFile().exists()){ //判断文件父目录是否存在
dest.getParentFile().mkdir();
}
try {
file.transferTo(dest);
}catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "false";
}
}
}
return "true";
}
}
- 创建模板文件
在resources目录下,创建一个templates目录,在templates下创建file.html和multifile.html
file.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<meta charset="UTF-8" />
<title>Insert title here</title>
</head>
<body>
<h1 th:inlines="text">文件上传</h1>
<form action="fileUpload" method="post" enctype="multipart/form-data">
<p>选择文件: <input type="file" name="fileName"/></p>
<p><input type="submit" value="提交"/></p>
</form>
</body>
</html>
multifile.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<meta charset="UTF-8" />
<title>Insert title here</title>
</head>
<body>
<h1 th:inlines="text">文件上传</h1>
<form action="multifileUpload" method="post" enctype="multipart/form-data" >
<p>选择文件1: <input type="file" name="fileName"/></p>
<p>选择文件2: <input type="file" name="fileName"/></p>
<p>选择文件3: <input type="file" name="fileName"/></p>
<p><input type="submit" value="提交"/></p>
</form>
</body>
</html>
- 测试
|||||||||||||||||||| 配置项目启动
a. Run -> Edit Configurations
b. 选择 “+” ,选择maven
c. 填写 Name:spring-boot:run , Command line : spring-boot:run
|||||||||||||||||||| 启动项目
Run -> Debug "spring-boot:run"
|||||||||||||||||||| 打开浏览器
单文件测试:
输入URL:http://localhost:8080/file
选择文件,提交
返回:true
查看上传目录中是否有你提交的文件。D:\test_dir\upload下发现提交文件。
多文件测试:
输入URL:http://localhost:8080/multifile
选择文件,提交
返回:true
查看上传目录中是否有你提交的文件。D:\test_dir\upload下发现提交文件。