java How to upload file in spring?
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时间：2020-11-03 07:57:48 来源:igfitidea点击:
How to upload file in spring?
提问by Anupam Choudhary
I am not able to get the file name in spring controller
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
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.
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by Amer Qarabsa
in your controller you need to specify that you are expecting mutlipart
in your controller you need to specify that you are expecting mutlipart
using
using
consumes = {"multipart/form-data"}
and to ge the file name using getOriginalFileName()
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"
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
change it to
<input type="file" name="uploadedFileName" id="fileToUpload" required="" >
回答by Ashish Chaudhary
You can also use MutlipartFile in order to upload file as follow.
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
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
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
You can follow complete tutorial on how to upload file in Spring Framework Upload File in Spring MVC framework
回答by leandro lion
- 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="" />
- 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
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by jagdish belkhade
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);
}
}
回答by dabaicai
I think you form is not handled by the method importQuestion,you can remove method = RequestMethod.POSTto make sure it.
I think you form is not handled by the method importQuestion,you can remove method = RequestMethod.POSTto make sure it.
