【发布时间】：2018-10-23 19:59:40
【问题描述】：
我有一个基于 Spring Boot 的后端，一个基于 Angular 5 的前端。 通过 Angular 接收到 MultiPartFile 后，我想用 唯一名称（表的 ID）并将文件存储到文件夹中，然后将此文件的 URL 放入数据库 PostgreSQL。 请帮助我，我测试了很多方法，没有任何好的结果。 我试图将 MultiPartFile 转换为文件，但我不知道该怎么做。 请帮帮我
这是包含处理 MultiPartFile 方法的类：
package smart.syndic.metier;
import java.net.MalformedURLException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.Resource;
import org.springframework.core.io.UrlResource;
import org.springframework.stereotype.Service;
import org.springframework.util.FileSystemUtils;
import org.springframework.web.multipart.MultipartFile;
@Service
public class StorageService
{
Logger logger = LoggerFactory.getLogger(this.getClass().getName());
private final Path rootLocation = Paths.get("fichiers/prestataires");
public void store(MultipartFile file) {
try {
Files.copy(file.getInputStream(),
this.rootLocation.resolve(file.getOriginalFilename()),
StandardCopyOption.REPLACE_EXISTING);
} catch (Exception e) {
throw new RuntimeException("FAIL!");
}
}
public Resource loadFile(String filename) {
try {
Path file = rootLocation.resolve(filename);
Resource resource = new UrlResource(file.toUri());
if (resource.exists() || resource.isReadable()) {
return resource;
} else {
throw new RuntimeException("FAIL!");
}
} catch (MalformedURLException e) {
throw new RuntimeException("FAIL!");
}
}
public void deleteAll() {
FileSystemUtils.deleteRecursively(rootLocation.toFile());
}
}
这里是 RestController：
package smart.syndic.web;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.Resource;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.http.HttpHeaders;
import org.springframework.http.ResponseEntity;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
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.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.mvc.method.annotation.
MvcUriComponentsBuilder;
import smart.syndic.dao.PrestatairesRepository;
import smart.syndic.dao.PrestatairesTypesRepository;
import smart.syndic.entities.Prestataires;
import smart.syndic.metier.StorageService;
@RestController
@CrossOrigin("*")
public class PrestatairesRestController
{
@Autowired
private PrestatairesRepository repository;
@Autowired
private PrestatairesTypesRepository repository2;
@Autowired
private StorageService storageService;
private List<String> files = new ArrayList<String>();
@RequestMapping(value="/prestataires/{id}",
method=RequestMethod.GET)
public Prestataires getVilles(@PathVariable Long id)
{
return repository.findOne(id);
}
@RequestMapping(value="/prestataires",
method=RequestMethod.POST)
public Prestataires addVilles(Prestataires p,
@RequestParam("multipartFile") MultipartFile file)
{
try{
storageService.store(file);
files.add(file.getOriginalFilename());
p.setPhoto("fichiers/prestataires/"+file.getOriginalFilename());
}catch(Exception e){
e.printStackTrace();
}
p.setPrestatairesTypes(repository2.findOne(p.getPrestatairesTypes()
.getId()));
return repository.save(p);
}
}
这里是实体 Prestataires：
package smart.syndic.entities;
import java.io.Serializable;
import java.util.Collection;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
@Entity
public class Prestataires implements Serializable
{
@Id @GeneratedValue
private Long id;
private String nom;
private String email;
private String tele;
private String fax;
private String rib;
private String adresse;
private String taches;
private String photo;
//-------------------Constructors--------------------
//-------------------Getters and Setters--------------------
@ManyToOne
@JoinColumn(name="ID_PRESTATAIRES_TYPES")
private PrestatairesTypes prestatairesTypes;
}
【问题讨论】：
-
您当前的代码有什么问题？
标签： java spring-boot jakarta-ee