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Spring Boot 2.x基础教程：实现多文件上传
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‎2.x/README.md‎

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- [Spring Boot 2.x基础教程：使用 Thymeleaf开发Web页面](http://blog.didispace.com/spring-boot-learning-21-4-1/)
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- [Spring Boot 2.x基础教程：使用 ECharts 绘制各种华丽的数据图表](http://blog.didispace.com/spring-boot-learning-21-4-2/)
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- [Spring Boot 2.x基础教程：实现文件上传](http://blog.didispace.com/spring-boot-learning-21-4-3/)
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- [Spring Boot 2.x基础教程：实现多文件上传](http://blog.didispace.com/spring-boot-learning-21-4-4/)
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## 版本资讯
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‎2.x/README_zh.md‎

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- [Spring Boot 2.x基础教程：使用 Thymeleaf开发Web页面](http://blog.didispace.com/spring-boot-learning-21-4-1/)
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- [Spring Boot 2.x基础教程：使用 ECharts 绘制各种华丽的数据图表](http://blog.didispace.com/spring-boot-learning-21-4-2/)
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- [Spring Boot 2.x基础教程：实现文件上传](http://blog.didispace.com/spring-boot-learning-21-4-3/)
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- [Spring Boot 2.x基础教程：实现多文件上传](http://blog.didispace.com/spring-boot-learning-21-4-4/)
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## 版本资讯
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‎2.x/chapter4-4/.gitignore‎

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HELP.md
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/target/
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!.mvn/wrapper/maven-wrapper.jar
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### STS ###
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.apt_generated
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.classpath
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.factorypath
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.project
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.settings
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.springBeans
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.sts4-cache
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### IntelliJ IDEA ###
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.idea
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*.iws
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*.iml
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*.ipr
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### NetBeans ###
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/nbproject/private/
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/nbbuild/
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/dist/
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/nbdist/
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/.nb-gradle/
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/build/
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### VS Code ###
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.vscode/

‎2.x/chapter4-4/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.4.1</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<groupId>com.didispace</groupId>
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<artifactId>chapter4-4</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<properties>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-thymeleaf</artifactId>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

‎2.x/chapter4-4/src/main/java/com/didispace/chapter44/Chapter44Application.java‎

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package com.didispace.chapter44;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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public class Chapter44Application {
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public static void main(String[] args) {
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SpringApplication.run(Chapter44Application.class, args);
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}
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}

‎2.x/chapter4-4/src/main/java/com/didispace/chapter44/UploadController.java‎

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package com.didispace.chapter44;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.PostMapping;
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import org.springframework.web.bind.annotation.RequestPart;
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import org.springframework.web.bind.annotation.ResponseBody;
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import org.springframework.web.multipart.MultipartFile;
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import java.io.File;
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import java.io.IOException;
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@Controller
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@Slf4j
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public class UploadController {
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@Value("${file.upload.path}")
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private String path;
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@GetMapping("/")
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public String uploadPage() {
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return "upload";
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}
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@PostMapping("/upload")
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@ResponseBody
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public String create(@RequestPart MultipartFile[] files) {
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StringBuffer message = new StringBuffer();
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for(MultipartFile file : files) {
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String fileName = file.getOriginalFilename();
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String filePath = path + fileName;
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File dest = new File(filePath);
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try {
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file.transferTo(dest);
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message.append("Upload file success : " + dest.getAbsolutePath()).append("<br>");
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} catch (IOException e) {
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log.error(e.getMessage(), e);
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message.append("Upload file failed : " + e.getMessage()).append("<br>");
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}
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}
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return message.toString();
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}
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}

‎2.x/chapter4-4/src/main/resources/application.properties‎

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spring.servlet.multipart.max-file-size=2MB
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spring.servlet.multipart.max-request-size=2MB
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file.upload.path=/Users/didi/

‎2.x/chapter4-4/src/main/resources/templates/upload.html‎

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<!DOCTYPE html>
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<html>
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<head lang="en">
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<meta charset="UTF-8" />
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<title>文件上传页面</title>
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</head>
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<body>
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<h1>文件上传页面</h1>
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<form method="post" action="/upload" enctype="multipart/form-data">
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文件1：<input type="file" name="files"><br>
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文件2：<input type="file" name="files"><br>
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<hr>
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<input type="submit" value="提交">
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</form>
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</body>
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</html>

‎2.x/chapter4-4/src/test/java/FileTest.java‎

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import org.junit.jupiter.api.Test;
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public class FileTest {
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@Test
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public void uploadFile() throws Exception {
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}
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}

‎2.x/pom.xml‎

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<!-- Web开发 -->
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<module>chapter4-1</module> <!-- 使用 Thymeleaf开发Web页面 -->
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<module>chapter4-2</module> <!-- 使用 ECharts 绘制折线图 -->
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<module>chapter4-3</module> <!-- 文件的上传与下载 -->
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<module>chapter4-3</module> <!-- 实现文件上传 -->
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<module>chapter4-4</module> <!-- 实现多文件上传 -->
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<!-- 各种缓存 -->
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<module>chapter5-1</module> <!-- 使用进程内缓存 -->

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