一、环境 Idea 2020.1 JDK 1.8 maven 二、目的 spring boot 整合web实现文件上传下载。 gitHub地址：https://github.com/ouyushan/ouyushan-spring-boot-samples
三、步骤
3.1、点击File -> New Project -> Spring Initializer，点击next
3.2、选择Web依赖，选中Spring Web。可以选择Spring Boot版本，本次默认为2.2.6，点击Next
3.3、项目结构
四、添加文件
添加静态文件
<?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 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>2.2.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>org.ouyuhsan</groupId> <artifactId>spring-boot-web-upload</artifactId> <version>0.0.1-SNAPSHOT</version> <name>spring-boot-web-upload</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-freemarker</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
添加index.ftl
<!DOCTYPE html> <html> <head lang="en"> <title>Spring Boot Demo - FreeMarker</title> <link href="/css/index.css" rel="stylesheet" /> </head> <body> <div style="text-align: center;"> <img src="/images/springboot.jpg" /> </div> <form method="POST" enctype="multipart/form-data" action="/file/upload"> 文件：<input type="file" name="file" /> <input type="submit" value="上传" /> </form> <script type="text/javascript" src="/webjars/jquery/3.3.1/jquery.min.js"></script> <script> $(function(){ $('#title').click(function(){ alert('点击了'); }); }) </script> </body> </html>
添加index.css
h1{color: blue;}
配置文件application.properties
spring.freemarker.template-loader-path=classpath:/templates
spring.freemarker.suffix=.ftl
# Multipart
spring.servlet.multipart.enabled=true
spring.servlet.multipart.max-file-size=2MB
spring.servlet.multipart.max-request-size=10MB
五、测试
点击选择文件按钮，选择对应文件后点击上传
