问题
I am not able to get the file name in spring controller
<form:form method="post" modelAttribute="sampleDetails"
enctype="multipart/form-data">
<input type="file" name="uploadedFileName" id="fileToUpload" required="" >
<input type="submit" name="import_file" value="Import File" id="" />
</form:form>
Its my post method in controller
@RequestMapping(method = RequestMethod.POST)
public String importQuestion(@Valid @RequestParam("uploadedFileName")
MultipartFile multipart, @ModelAttribute("sampleDetails") SampleDocumentPojo sampleDocument, BindingResult result, ModelMap model) {
logger.debug("Post method of uploaded Questions ");
logger.debug("Uploaded file Name : " + multipart.getName());
return "importQuestion";
}
After submit get the warning message.
warning [http-nio-8080-exec-9] WARN
org.springframework.web.servlet.PageNotFound - Request method 'POST' not
supported
[http-nio-8080-exec-9] WARN
org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver
- Handler execution resulted in exception: Request method 'POST' not
supported
回答1:
in your controller you need to specify that you are expecting mutlipart
using
consumes = {"multipart/form-data"}
and to ge the file name using getOriginalFileName()
@RequestMapping(method = RequestMethod.POST, consumes = {"multipart/form-data"})
public String importQuestion(@Valid @RequestParam("uploadedFileName")
MultipartFile multipart, BindingResult result, ModelMap model) {
logger.debug("Post method of uploaded Questions ");
logger.debug("Uploaded file Name : " + multipart.getOriginalFilename());
return "importQuestion";
}
Also in your html the name of your input of type file should be the same as the RequestParam "uploadedFileName"
<input type="file" name="uploadFileName" id="fileToUpload" required="" >
change it to
<input type="file" name="uploadedFileName" id="fileToUpload" required="" >
回答2:
You can also use MutlipartFile in order to upload file as follow.
@RequestMapping(value = "/uploadFile", method = RequestMethod.POST)
@ResponseBody
public String uploadFile(@RequestParam("file") MultipartFile file) {
try {
String uploadDir = "/uploads/";
String realPath = request.getServletContext().getRealPath(uploadDir);
File transferFile = new File(realPath + "/" + file.getOriginalFilename());
file.transferTo(transferFile);
} catch (Exception e) {
e.printStackTrace();
return "Failure";
}
return "Success";
}
You don't need to use spring form for file upload, you can do it with plain HTML
<html>
<body>
<h2>Spring MVC file upload using Annotation configuration Metadata</h2>
Upload File :
<form name="fileUpload" method="POST" action="uploadFile" enctype="multipart/form-data">
<label>Select File</label> <br />
<input type="file" name="file" />
<input type="submit" name="submit" value="Upload" />
</form>
</body>
</html>
You need to configure MultipartResolver object in yours application configuration as follow
@Bean(name="multipartResolver")
public CommonsMultipartResolver multipartResolver() {
CommonsMultipartResolver multi = new CommonsMultipartResolver();
multi.setMaxUploadSize(100000);
return multi;
}
You can follow complete tutorial on how to upload file in Spring Framework Upload File in Spring MVC framework
回答3:
I think you form is not handled by the method importQuestion,you can remove method = RequestMethod.POST to make sure it.
回答4:
- your model name not reference to MultipartFile
can have cross reference in yours mappings try this:
<form:form method="post" action="testcontrol" enctype="multipart/form-data"> <input type="file" name="uploadedFileName" id="fileToUpload" required="" > <input type="submit" name="import_file" value="Import File" id="" />
and set in your controller
@RequestMapping(method = RequestMethod.POST,path="/testcontrol")
public String importQuestion(@RequestParam("uploadedFileName")
MultipartFile multipart, BindingResult result, ModelMap model) {
logger.debug("Post method of uploaded Questions ");
logger.debug("Uploaded file Name : " + multipart.getName());
return "importQuestion";
}
回答5:
package com.form.demo.Controll;
import com.form.demo.Repo.CustoRepo;
import com.form.demo.Serv.CustoSevice;
import com.form.demo.model.Customer;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import javax.validation.Valid;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
@Controller
@RequestMapping("/")
public class SimpleWebController {
private CustoSevice custoSevice;
public SimpleWebController(CustoSevice custoSevice) {
this.custoSevice = custoSevice;
}
public static String uploadDirectory = System.getProperty("user.dir")+"/uploads";
@RequestMapping(value={"/","/form"}, method=RequestMethod.GET)
public String customerForm(Model model) {
model.addAttribute("customer", new Customer());
return "form";
}
@RequestMapping(value="/form", method=RequestMethod.POST)
public String customerSubmit(@ModelAttribute Customer customer,Model model,@RequestParam("files") MultipartFile[] files) {
StringBuilder fileNames = new StringBuilder();
String path1 = "";
for (MultipartFile file : files) {
Path fileNameAndPath = Paths.get(uploadDirectory, file.getOriginalFilename());
fileNames.append(file.getOriginalFilename()+" ");
try {
Files.write(fileNameAndPath, file.getBytes());
} catch (IOException e) {
e.printStackTrace();
}
path1=fileNameAndPath.toString();
}
customer.setImage(path1);
model.addAttribute("customer", customer);
custoSevice.save(customer);
return "result";
}
@RequestMapping(value = "/vewall")
public String vew(Model model){
List<Customer>customers=custoSevice.findAll();
model.addAttribute("cus",customers);
return "vewall";
}
@RequestMapping(value={"/","/update/{id}"}, method=RequestMethod.GET)
public String showUpdateForm(@PathVariable("id") long id, Model model) {
Customer customer = custoSevice.findById(id);
model.addAttribute("user", customer);
return "update";
}
@RequestMapping(value={"/","/update/{id}"}, method=RequestMethod.POST)
public String updateUser(@Valid Customer customer,Model model) {
custoSevice.save(customer);
model.addAttribute("cus", custoSevice.findAll());
return "vewall";
}
@RequestMapping(value = "/delete/{id}",method = RequestMethod.GET)
public String deleteUser(@PathVariable("id") long id, Model model) {
Customer customer = custoSevice.findById(id);
custoSevice.delete(customer);
model.addAttribute("cus", custoSevice.findAll());
return "vewall";
}
}
package com.form.demo.model;
import javax.persistence.*;
import java.io.Serializable;
import java.util.Objects;
@Entity
@Table(name = "cust4")
public class Customer implements Serializable {
@Id
// @GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@Column(name = "firstname")
private String firstname;
@Column(name = "lastname")
private String lastname;
@Column(name = "image")
private String image;
public Customer() {
this.id = id;
this.firstname = firstname;
this.lastname = lastname;
this.image = image;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Customer customer = (Customer) o;
return id == customer.id &&
Objects.equals(firstname, customer.firstname) &&
Objects.equals(lastname, customer.lastname) &&
Objects.equals(image, customer.image);
}
@Override
public int hashCode() {
return Objects.hash(id, firstname, lastname, image);
}
@Override
public String toString() {
return "Customer{" +
"id=" + id +
", firstname='" + firstname + '\'' +
", lastname='" + lastname + '\'' +
", image='" + image + '\'' +
'}';
}
}
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<meta>
<meta charset="UTF-8"></meta>
<title>Title</title>
</head>
<body>
<h1>Customer Form</h1>
<form action="#" th:action="@{/form}" th:object="${customer}" method="post" enctype="multipart/form-data">
<p>First Name: <input type="text" th:field="*{firstname}" /></p>
<p>Last Name: <input type="text" th:field="*{lastname}" /></p>
<p>Image: <input type="file" name="files" multiple></p>
<p><input type="submit" value="Submit" /> <input type="reset" value="Reset" /></p>
<br>
<a href="vewall">Viewall</a>
</form>
</body>
</html>
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<title>Title</title>
</head>
<body>
<h2>List of cities</h2>
<table>
<tr>
<th>ID</th>
<th>FName</th>
<th>LName</th>
<th>Path</th>
<th>Edit</th>
<th>Delete</th>
</tr>
<tr th:each="city : ${cus}">
<td th:text="${city.id}">Id</td>
<td th:text="${city.firstname}">Name</td>
<td th:text="${city.lastname}">Population</td>
<td th:text="${city.image}">Path </td>
<td><a th:href="@{/update/{id}(id=${city.id})}">Edit</a></td>
<td><a th:href="@{/delete/{id}(id=${city.id})}">Delete</a></td>
</tr>
</table>
</body>
</html>
spring.datasource.url=jdbc:mysql://localhost:3306/new1
spring.datasource.username=root
spring.datasource.password=root
spring.servlet.multipart.max-file-size=15MB
spring.servlet.multipart.max-request-size=15MB
//
package com.example.demo;
import java.io.File;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import controller.FileUploadController;
@Configuration
@EnableAutoConfiguration
@ComponentScan({"demo","controller"})
public class FileUploadApplication {
public static void main(String[] args) {
new File(FileUploadController.uploadDirectory).mkdir();
SpringApplication.run(FileUploadApplication.class, args);
}
}
来源：https://stackoverflow.com/questions/44128195/how-to-upload-file-in-spring