springboot项目作为静态文件服务器

springboot默认文件作用

使用 spring initialzr 创建 spring boot 项目

https://start.spring.io/

static 存放静态资源

template 存放模板页面 , 例如 thymeleaf

自定义静态文件存放目录

springboot 自动装配 , 默认静态资源的目录是 static

默认还有其它目录

classpath:/META-INF/resources/
classpath:/resources/

classpath:/static/

classpath:/public/

源码

ResourceProperties.java

	private static final String[] CLASSPATH_RESOURCE_LOCATIONS = { "classpath:/META-INF/resources/","classpath:/resources/", "classpath:/static/", "classpath:/public/" };/*** Locations of static resources. Defaults to classpath:[/META-INF/resources/,* /resources/, /static/, /public/].*/private String[] staticLocations = CLASSPATH_RESOURCE_LOCATIONS;
....

我们可以自定义

application.properties

spring.resources.static-locations=classpath:/custom/

如图存放的静态资源

测试

引入依赖

org.springframework.bootspring-boot-starter-web

新建测试 controller

HelloController.java

package com.example.controller;import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;@RestController
public class HelloController {private static final String STATIC_FILE = "custom";@Value("${server.port}")private String port;@GetMapping({"/file","/"})public String hello(HttpServletResponse response) throws IOException {List staticFile = getStaticFile();StringBuilder sb = new StringBuilder("");for (String s : staticFile) {sb.append("");sb.append(s);sb.append("");sb.append("
");}return sb.toString();}public List getStaticFile() {URL aStatic = this.getClass().getClassLoader().getResource(STATIC_FILE);String filePath = aStatic.getFile();File file = new File(filePath);File[] files = file.listFiles();List staticFileList = Arrays.asList(files).stream().map(File::getName).collect(Collectors.toList());return staticFileList;}
}

测试页面

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可以查看图片

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-FdC5jrPK-1670335291010)(D:\my-note\typora-picture\image-20221206215534399.png)]

可以下载资源