Spring boot Sample 012之spring-boot-web-upload

一、环境

1.1、Idea 2020.1

1.2、JDK 1.8

二、目的

spring boot 整合web实现文件上传下载

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

http://localhost:8080/index/

 

点击选择文件按钮，选择对应文件后点击上传