java - 有没有办法在不使用 Spring-MVC 的情况下使用 spring-data-rest 编写一个 rest Controller 来上传文件？

Question

我已经像给定的代码一样创建了存储库

@RepositoryRestResource(collectionResourceRel = "sample", path = "/sample" )
public interface SampleRepository extends PagingAndSortingRepository<Sample, Long> {

}

适用于所有 crud 操作。

但我想创建一个上传文件的休息存储库，我将如何使用 spring-data-rest 做到这一点？

Answer 1

Spring Data Rest 只是将您的 Spring Data 存储库公开为 REST 服务。支持的媒体类型是application/hal+json 和application/json。

此处列出了您可以对 Spring Data Rest 进行的自定义:Customizing Spring Data REST .

如果您想执行任何其他操作，您需要编写一个单独的 Controller (以下示例来自 Uploading Files):

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

@Controller
public class FileUploadController {

    @RequestMapping(value="/upload", method=RequestMethod.GET)
    public @ResponseBody String provideUploadInfo() {
        return "You can upload a file by posting to this same URL.";
    }

    @RequestMapping(value="/upload", method=RequestMethod.POST)
    public @ResponseBody String handleFileUpload(@RequestParam("name") String name,
            @RequestParam("file") MultipartFile file){
        if (!file.isEmpty()) {
            try {
                byte[] bytes = file.getBytes();
                BufferedOutputStream stream =
                        new BufferedOutputStream(new FileOutputStream(new File(name)));
                stream.write(bytes);
                stream.close();
                return "You successfully uploaded " + name + "!";
            } catch (Exception e) {
                return "You failed to upload " + name + " => " + e.getMessage();
            }
        } else {
            return "You failed to upload " + name + " because the file was empty.";
        }
    }

}