本文介紹了上傳文件springboot所需的請求部分“文件"不存在的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學(xué)習(xí)吧！
問題描述
我想在我的 Spring Boot 應(yīng)用程序中添加一個上傳功能；這是我上傳的 Rest Controller
包 org.sid.web;導(dǎo)入 java.io.BufferedOutputStream；導(dǎo)入java.io.File；導(dǎo)入 java.io.FileOutputStream；導(dǎo)入 java.io.IOException；導(dǎo)入 java.nio.file.Files；導(dǎo)入 java.nio.file.Path；導(dǎo)入 java.nio.file.Paths；導(dǎo)入 java.util.ArrayList；導(dǎo)入 java.util.List；導(dǎo)入 javax.servlet.ServletContext；導(dǎo)入 org.springframework.beans.factory.annotation.Autowired；導(dǎo)入 org.springframework.http.HttpEntity；導(dǎo)入 org.springframework.http.HttpHeaders；導(dǎo)入 org.springframework.http.HttpStatus；導(dǎo)入 org.springframework.http.MediaType；導(dǎo)入 org.springframework.http.ResponseEntity；導(dǎo)入 org.springframework.stereotype.Controller；導(dǎo)入 org.springframework.util.LinkedMultiValueMap；導(dǎo)入 org.springframework.web.bind.annotation.GetMapping；導(dǎo)入 org.springframework.web.bind.annotation.PostMapping；導(dǎo)入 org.springframework.web.bind.annotation.RequestMapping；導(dǎo)入 org.springframework.web.bind.annotation.RequestMethod；導(dǎo)入 org.springframework.web.bind.annotation.RequestParam；導(dǎo)入 org.springframework.web.bind.annotation.ResponseBody；導(dǎo)入 org.springframework.web.bind.annotation.RestController；導(dǎo)入 org.springframework.web.client.RestTemplate；導(dǎo)入 org.springframework.web.multipart.MultipartFile；導(dǎo)入 org.springframework.web.servlet.mvc.support.RedirectAttributes；導(dǎo)入 org.springframework.core.env.Environment；導(dǎo)入 org.springframework.core.io.ClassPathResource；導(dǎo)入 org.springframework.core.io.FileSystemResource；導(dǎo)入 org.sid.entities.FileInfo；@RestController公共類 UploadController {@自動連線ServletContext 上下文；@RequestMapping(value = "/fileupload/file", headers = ("content-type=multipart/*"), method = RequestMethod.POST, consumes = MediaType.MULTIPART_FORM_DATA_VALUE)公共響應(yīng)實體<文件信息>上傳(@RequestParam(文件")MultipartFile inputFile){文件信息文件信息 = 新文件信息()；HttpHeaders 標(biāo)頭 = 新的 HttpHeaders();if (!inputFile.isEmpty()) {嘗試 {String originalFilename = inputFile.getOriginalFilename();文件目標(biāo)文件 = 新文件(context.getRealPath("C:/Users/kamel/workspace/credit_app/uploaded") + File.separator + originalFilename);inputFile.transferTo(destinationFile);fileInfo.setFileName(destinationFile.getPath());fileInfo.setFileSize(inputFile.getSize());headers.add("文件上傳成功-", originalFilename);return new ResponseEntity(fileInfo, headers, HttpStatus.OK);} 捕捉(異常 e){返回新的 ResponseEntity<FileInfo>(HttpStatus.BAD_REQUEST);}} 別的 {返回新的 ResponseEntity<FileInfo>(HttpStatus.BAD_REQUEST);}}} 但是當(dāng)在郵遞員中插入
我的示例代碼:
application.properties
#max 文件和請求大小spring.http.multipart.max-file-size=10MBspring.http.multipart.max-request-size=11MB主要應(yīng)用類:
Application.java
import org.springframework.boot.SpringApplication;導(dǎo)入 org.springframework.boot.autoconfigure.SpringBootApplication；@SpringBootApplication公共類應(yīng)用程序{公共靜態(tài)無效主要(字符串[]參數(shù)){SpringApplication.run(Application.class, args);}}Rest 控制器類:
import org.springframework.http.MediaType;導(dǎo)入 org.springframework.stereotype.Controller；導(dǎo)入 org.springframework.ui.Model；導(dǎo)入 org.springframework.web.bind.annotation.RequestBody；導(dǎo)入 org.springframework.web.bind.annotation.RequestMapping；導(dǎo)入 org.springframework.web.bind.annotation.RequestMethod；導(dǎo)入 org.springframework.web.bind.annotation.RequestParam；導(dǎo)入 org.springframework.web.bind.annotation.ResponseBody；導(dǎo)入 org.springframework.web.multipart.MultipartFile；@控制器@RequestMapping("/文件上傳")公共類 MyRestController {@RequestMapping(值 = "/file", 方法 = RequestMethod.POST, 產(chǎn)生 = MediaType.APPLICATION_JSON_VALUE)public @ResponseBody String myService(@RequestParam("file") MultipartFile 文件，@RequestParam("id") String id) 拋出異常 {如果(！file.isEmpty()){//你的邏輯}返回一些json"；}}pom.xml
//...<父母><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.2.RELEASE</version><相對路徑/><!-- 從存儲庫中查找父級--></父母>……<依賴性><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web-services</artifactId></依賴>//...I want to add an upload function to my spring boot application; this is my upload Rest Controller
package org.sid.web;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletContext;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
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.client.RestTemplate;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import org.springframework.core.env.Environment;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.FileSystemResource;
import org.sid.entities.FileInfo;
@RestController
public class UploadController {
@Autowired
ServletContext context;
@RequestMapping(value = "/fileupload/file", headers = ("content-type=multipart/*"), method = RequestMethod.POST, consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
public ResponseEntity<FileInfo> upload(@RequestParam("file") MultipartFile inputFile) {
FileInfo fileInfo = new FileInfo();
HttpHeaders headers = new HttpHeaders();
if (!inputFile.isEmpty()) {
try {
String originalFilename = inputFile.getOriginalFilename();
File destinationFile = new File(
context.getRealPath("C:/Users/kamel/workspace/credit_app/uploaded") + File.separator + originalFilename);
inputFile.transferTo(destinationFile);
fileInfo.setFileName(destinationFile.getPath());
fileInfo.setFileSize(inputFile.getSize());
headers.add("File Uploaded Successfully - ", originalFilename);
return new ResponseEntity<FileInfo>(fileInfo, headers, HttpStatus.OK);
} catch (Exception e) {
return new ResponseEntity<FileInfo>(HttpStatus.BAD_REQUEST);
}
} else {
return new ResponseEntity<FileInfo>(HttpStatus.BAD_REQUEST);
}
}
}
but when testing this in postman with inserting http://localhost:8082/fileupload/file and adding a file to the body
i got this error: "exception": org.springframework.web.multipart.support.MissingServletRequestPartException",
"message": "Required request part 'file' is not present,
解決方案
This is how your request in Postman should look like:
My sample code:
application.properties
#max file and request size
spring.http.multipart.max-file-size=10MB
spring.http.multipart.max-request-size=11MB
Main Application Class:
Application.java
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
Rest controller class:
import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
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.multipart.MultipartFile;
@Controller
@RequestMapping("/fileupload")
public class MyRestController {
@RequestMapping(value = "/file", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE)
public @ResponseBody String myService(@RequestParam("file") MultipartFile file,
@RequestParam("id") String id) throws Exception {
if (!file.isEmpty()) {
//your logic
}
return "some json";
}
}
pom.xml
//...
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.2.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
....
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web-services</artifactId>
</dependency>
//...
這篇關(guān)于上傳文件springboot所需的請求部分“文件"不存在的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！
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