SpringBoot学习

一、swagger测试接口

• 了解

随着互联网技术的发展，现在的网站架构基本都由原来的后端渲染，变成了：前端渲染、先后端分离的形态，而且前端技术和后端技术在各自的道路上越走越远。
前端和后端的唯一联系，变成了API接口；API文档变成了前后端开发人员联系的纽带，变得越来越重要，swagger就是一款让你更好的书写API文档的框架。

• 在pom里添加依赖

   
      com.spring4all
      swagger-spring-boot-starter
      1.8.0.RELEASE
   

• 在Appolication里添加@EnableSwagger2Doc注解

import com.spring4all.swagger.EnableSwagger2Doc;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@EnableSwagger2Doc
@SpringBootApplication
public class SpringBootWebsocketApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringBootWebsocketApplication.class, args);
    }
}

• 参数配置

#swagger配置
swagger.enabled=true
swagger.title=jianyue  api project
swagger.description=Starter for swagger 2.x
swagger.license=Apache License, Version 2.0
swagger.licenseUrl=https://www.apache.org/licenses/LICENSE-2.0.html
swagger.termsOfServiceUrl=https://github.com/1702343123/spring-study
swagger.contact.name=Wj
swagger.contact.url=https://www.jianshu.com/u/ec5ebfec0565
[email protected]
swagger.base-package=com.soft1721.jianyue.api.controller
swagger.base-path=/**
swagger.exclude-path=/error, /ops/**

• 网址和结果
  http://localhost:8080/swagger-ui.html
  
  

  swagger.png

二、文件上传

• 实现将本地图片上传到服务器指定路径的基础功能
  新建一个module，命名为file-upload，勾选web、Thymeleaf依赖
  pom.xml:

       
            org.springframework.boot
            spring-boot-starter-thymeleaf
        
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        

• application.properties配置上传参数

spring.servlet.multipart.max-file-size=100MB
spring.servlet.multipart.max-request-size=100MB

• 编写UploadController，映射上传请求

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
@Controller
public class UploadController {
    private static String UPLOADED_FOLDER = "E:/temp/";
    @GetMapping("/")
    public String index() {
        return "upload";
    }
    @PostMapping("/upload")
    public String singleFileUpload(@RequestParam("file") MultipartFile file,
                                   RedirectAttributes redirectAttributes) {
        if (file.isEmpty()) {
            redirectAttributes.addFlashAttribute("message", "请选择一个文件");
            return "redirect:upload_status";
        }
        try {
            byte[] bytes = file.getBytes();
            Path path = Paths.get(UPLOADED_FOLDER + file.getOriginalFilename());
            Files.write(path, bytes);
            redirectAttributes.addFlashAttribute("message",
                    "文件成功上传!" + file.getOriginalFilename());
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "redirect:/upload_status";
    }
    @GetMapping("/upload_status")
    public String uploadStatus() {
        return "upload_status";
    }
}

• upload.html

Spring Boot 文件上传示例

    
    

    

    

• upload_status.html

Spring Boot - 文件上传状态

    

注：如果要把上传的路径跟着项目，如在static目录下的upload文件夹，则需要更改UploadController代码。

@PostMapping("/upload")
    public String singleFileUpload(@RequestParam("file") MultipartFile srcFile,
                                   RedirectAttributes redirectAttributes) {
        if (srcFile.isEmpty()) {
            redirectAttributes.addFlashAttribute("message", "请选择一个文件");
            return "redirect:upload_status";
        }
        try {
            File destFile = new File(ResourceUtils.getURL("classpath:").getPath());
            if (!destFile.exists()) {
                destFile = new File("");
            }
            System.out.println("file path:" + destFile.getAbsolutePath());
            File upload = new File(destFile.getAbsolutePath(), "static/");
            if (!upload.exists()) {
                upload.mkdirs();
            }
            System.out.println("upload url:" + upload.getAbsolutePath());
            Path path = Paths.get(upload.getAbsolutePath() + "/" + srcFile.getOriginalFilename());
            byte[] bytes = srcFile.getBytes();
            Files.write(path, bytes);
            redirectAttributes.addFlashAttribute("message",
                    "文件成功上传!" + srcFile.getOriginalFilename());
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "redirect:/upload_status";
    }
    ```