SpringBoot之文件上传（单文件与多文件上传的使用）

---

前言

SpringBoot的单文件、多文件上传。

---

文件上传

• 页面代码/static/form/form_layouts.html

<form role="form" th:action="@{/upload}" method="post" enctype="multipart/form-data">
    <div class="form-group">
        <label for="exampleInputEmail1">邮箱label>
        <input type="email" name="email" class="form-control" id="exampleInputEmail1" placeholder="Enter email">
    div>
    
    <div class="form-group">
        <label for="exampleInputPassword1">名字label>
        <input type="text" name="username" class="form-control" id="exampleInputPassword1" placeholder="Password">
    div>
    
    <div class="form-group">
        <label for="exampleInputFile">头像label>
        <input type="file" name="headerImg" id="exampleInputFile">
    div>
    
    <div class="form-group">
        <label for="exampleInputFile">生活照label>
        <input type="file" name="photos" multiple>
    div>
    
    <div class="checkbox">
        <label>
            <input type="checkbox"> Check me out
        label>
    div>
    <button type="submit" class="btn btn-primary">提交button>
form>

• 控制层代码

	@Slf4j
	@Controller
    @GetMapping("/main")
    public  String mainPage(){
        return "main.html";

    @PostMapping("/upload")
    public String upload(@RequestParam("email") String email,
                         @RequestParam("username") String username,
                         @RequestPart("headerImg") MultipartFile headerImg,
                         @RequestPart("photos") MultipartFile[] photos) throws IOException {

        log.info("上传的信息：email={}，username={}，headerImg={}，photos={}",
                 email,username,headerImg.getSize(),photos.length);

        if(!headerImg.isEmpty()){
            //保存到文件服务器，OSS服务器
            String originalFilename = headerImg.getOriginalFilename();
            headerImg.transferTo(new File("H:\\dragon\\"+originalFilename));
        }

        if(photos.length > 0){
            for (MultipartFile photo : photos) {
                if(!photo.isEmpty()){
                    String originalFilename = photo.getOriginalFilename();
                    photo.transferTo(new File("H:\\dragon\\"+originalFilename));
                }
            }
        }


        return "main";
    }
}

文件上传相关的配置类：

• org.springframework.boot.autoconfigure.web.servlet.MultipartAutoConfiguration
• org.springframework.boot.autoconfigure.web.servlet.MultipartProperties

文件大小相关配置项：

spring.servlet.multipart.max-file-size=10MB
spring.servlet.multipart.max-request-size=100MB

---

总结

以上就是SpringBoot文件上传讲解。