Javascript Spring引导控制器-将多部分和JSON上载到DTO
我想将表单中的文件上载到Spring Boot API端点 用户界面是用React编写的:Javascript Spring引导控制器-将多部分和JSON上载到DTO,javascript,java,spring-boot,Javascript,Java,Spring Boot,我想将表单中的文件上载到Spring Boot API端点 用户界面是用React编写的: export function createExpense(formData) { return dispatch => { axios.post(ENDPOINT, formData, headers: { 'Authorization': //..., 'Content-Type': 'application/json'
export function createExpense(formData) {
return dispatch => {
axios.post(ENDPOINT,
formData,
headers: {
'Authorization': //...,
'Content-Type': 'application/json'
}
).then(({data}) => {
//...
})
.catch(({response}) => {
//...
});
};
}
_onSubmit = values => {
let formData = new FormData();
formData.append('title', values.title);
formData.append('description', values.description);
formData.append('amount', values.amount);
formData.append('image', values.image[0]);
this.props.createExpense(formData);
}
这是java端代码:
@RequestMapping(path = "/{groupId}", method = RequestMethod.POST)
public ExpenseSnippetGetDto create(@RequestBody ExpensePostDto expenseDto, @PathVariable long groupId, Principal principal, BindingResult result) throws IOException {
//..
}
但我在Java方面遇到了一个例外:
org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'multipart/form-data;boundary=----WebKitFormBoundaryapHVvBsdZYc6j4Af;charset=UTF-8' not supported
我应该如何解决这个问题?类似的API端点和JavaScript端代码已经开始工作
注
我看到了一个解决方案,它建议请求主体应该有两个属性:一个是JSON部分下的属性,另一个是图像属性。我想看看是否有可能将其自动转换为DTO
更新1 客户端发送的上载负载应转换为以下DTO:
public class ExpensePostDto extends ExpenseBaseDto {
private MultipartFile image;
private String description;
private List<Long> sharers;
}
在前端,去掉
内容类型
,因为它应该由浏览器本身决定,并使用FormData
(标准JavaScript)。这应该可以解决问题。我用AngularJS和SpringBoot构建了我最新的文件上传应用程序,它们在语法上非常相似,可以在这里帮助您
我的客户端请求处理程序:
uploadFile=function(fileData){
var formData=new FormData();
formData.append('file',fileData);
return $http({
method: 'POST',
url: '/api/uploadFile',
data: formData,
headers:{
'Content-Type':undefined,
'Accept':'application/json'
}
});
};
需要注意的是,Angular会自动为我设置“Content type”头值上的多部分mime类型和边界。你的可能不会,在这种情况下,你需要自己设置它
我的应用程序需要来自服务器的JSON响应,因此需要“Accept”头
您自己正在传递FormData对象,因此需要确保表单将文件设置为您在控制器上映射到的任何属性。在我的例子中,它被映射到FormData对象上的“file”参数
我的控制器端点如下所示:
@POST
@RequestMapping("/upload")
public ResponseEntity<Object> upload(@RequestParam("file") MultipartFile file)
{
if (file.isEmpty()) {
return new ResponseEntity<Object>(HttpStatus.BAD_REQUEST);
} else {
//...
}
}
uploadFile=function(fileData, otherData){
var formData=new FormData();
formData.append('file',fileData);
formData.append('expenseDto',otherData);
return $http({
method: 'POST',
url: '/api/uploadFile',
data: formData,
headers:{
'Content-Type':undefined,
'Accept':'application/json'
}
});
};
@POST
@RequestMapping("/upload")
public ResponseEntity<Object> upload(@RequestParam("file") MultipartFile file, @RequestParam("expenseDto") ExpensePostDto expenseDto)
{
if (file.isEmpty()) {
return new ResponseEntity<Object>(HttpStatus.BAD_REQUEST);
} else {
//...
}
}
然后,控制器端点将如下所示:
@POST
@RequestMapping("/upload")
public ResponseEntity<Object> upload(@RequestParam("file") MultipartFile file)
{
if (file.isEmpty()) {
return new ResponseEntity<Object>(HttpStatus.BAD_REQUEST);
} else {
//...
}
}
uploadFile=function(fileData, otherData){
var formData=new FormData();
formData.append('file',fileData);
formData.append('expenseDto',otherData);
return $http({
method: 'POST',
url: '/api/uploadFile',
data: formData,
headers:{
'Content-Type':undefined,
'Accept':'application/json'
}
});
};
@POST
@RequestMapping("/upload")
public ResponseEntity<Object> upload(@RequestParam("file") MultipartFile file, @RequestParam("expenseDto") ExpensePostDto expenseDto)
{
if (file.isEmpty()) {
return new ResponseEntity<Object>(HttpStatus.BAD_REQUEST);
} else {
//...
}
}
@POST
@请求映射(“/upload”)
公共响应上传(@RequestParam(“文件”)多部分文件,@RequestParam(“expenseDto”)ExpensePostDto expenseDto)
{
if(file.isEmpty()){
返回新的响应属性(HttpStatus.BAD_请求);
}否则{
//...
}
}
将使用者类型添加到您的请求映射中。它应该可以正常工作
@POST
@RequestMapping("/upload")
public ResponseEntity<Object> upload(@RequestParam("file") MultipartFile file,consumes = "multipart/form-data")
{
if (file.isEmpty()) {
return new ResponseEntity<Object>(HttpStatus.BAD_REQUEST);
} else {
//...
}
}
@POST
@请求映射(“/upload”)
公共响应性上载(@RequestParam(“文件”)MultipartFile file,consumes=“multipart/form data”)
{
if(file.isEmpty()){
返回新的响应属性(HttpStatus.BAD_请求);
}否则{
//...
}
}
是的,您可以通过包装器类简单地完成
1) 创建一个类
以保存表单数据:
public class FormWrapper {
private MultipartFile image;
private String title;
private String description;
}
2) 创建用于提交数据的HTML表单
:
<form method="POST" enctype="multipart/form-data" id="fileUploadForm" action="link">
<input type="text" name="title"/><br/>
<input type="text" name="description"/><br/><br/>
<input type="file" name="image"/><br/><br/>
<input type="submit" value="Submit" id="btnSubmit"/>
</form>
4) 保存文件的方法
:
private void saveUploadedFile(MultipartFile file) throws IOException {
if (!file.isEmpty()) {
byte[] bytes = file.getBytes();
Path path = Paths.get(UPLOADED_FOLDER + file.getOriginalFilename());
Files.write(path, bytes);
}
}
我使用纯JS和Spring Boot创建了一个类似的东西。 这是你的电话号码 我将
用户
对象作为JSON
发送,并将文件
作为多部分/表单数据
请求的一部分发送
下面是相关的代码片段
控制器
代码
@RestController
public class FileUploadController {
@RequestMapping(value = "/upload", method = RequestMethod.POST, consumes = { "multipart/form-data" })
public void upload(@RequestPart("user") @Valid User user,
@RequestPart("file") @Valid @NotNull @NotBlank MultipartFile file) {
System.out.println(user);
System.out.println("Uploaded File: ");
System.out.println("Name : " + file.getName());
System.out.println("Type : " + file.getContentType());
System.out.println("Name : " + file.getOriginalFilename());
System.out.println("Size : " + file.getSize());
}
static class User {
@NotNull
String firstName;
@NotNull
String lastName;
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;
}
@Override
public String toString() {
return "User [firstName=" + firstName + ", lastName=" + lastName + "]";
}
}
}
<html>
<head>
<script>
function onSubmit() {
var formData = new FormData();
formData.append("file", document.forms["userForm"].file.files[0]);
formData.append('user', new Blob([JSON.stringify({
"firstName": document.getElementById("firstName").value,
"lastName": document.getElementById("lastName").value
})], {
type: "application/json"
}));
var boundary = Math.random().toString().substr(2);
fetch('/upload', {
method: 'post',
body: formData
}).then(function (response) {
if (response.status !== 200) {
alert("There was an error!");
} else {
alert("Request successful");
}
}).catch(function (err) {
alert("There was an error!");
});;
}
</script>
</head>
<body>
<form name="userForm">
<label> File : </label>
<br/>
<input name="file" type="file">
<br/>
<label> First Name : </label>
<br/>
<input id="firstName" name="firstName" />
<br/>
<label> Last Name : </label>
<br/>
<input id="lastName" name="lastName" />
<br/>
<input type="button" value="Submit" id="submit" onclick="onSubmit(); return false;" />
</form>
</body>
</html>
HTML
和JS
code
@RestController
public class FileUploadController {
@RequestMapping(value = "/upload", method = RequestMethod.POST, consumes = { "multipart/form-data" })
public void upload(@RequestPart("user") @Valid User user,
@RequestPart("file") @Valid @NotNull @NotBlank MultipartFile file) {
System.out.println(user);
System.out.println("Uploaded File: ");
System.out.println("Name : " + file.getName());
System.out.println("Type : " + file.getContentType());
System.out.println("Name : " + file.getOriginalFilename());
System.out.println("Size : " + file.getSize());
}
static class User {
@NotNull
String firstName;
@NotNull
String lastName;
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;
}
@Override
public String toString() {
return "User [firstName=" + firstName + ", lastName=" + lastName + "]";
}
}
}
<html>
<head>
<script>
function onSubmit() {
var formData = new FormData();
formData.append("file", document.forms["userForm"].file.files[0]);
formData.append('user', new Blob([JSON.stringify({
"firstName": document.getElementById("firstName").value,
"lastName": document.getElementById("lastName").value
})], {
type: "application/json"
}));
var boundary = Math.random().toString().substr(2);
fetch('/upload', {
method: 'post',
body: formData
}).then(function (response) {
if (response.status !== 200) {
alert("There was an error!");
} else {
alert("Request successful");
}
}).catch(function (err) {
alert("There was an error!");
});;
}
</script>
</head>
<body>
<form name="userForm">
<label> File : </label>
<br/>
<input name="file" type="file">
<br/>
<label> First Name : </label>
<br/>
<input id="firstName" name="firstName" />
<br/>
<label> Last Name : </label>
<br/>
<input id="lastName" name="lastName" />
<br/>
<input type="button" value="Submit" id="submit" onclick="onSubmit(); return false;" />
</form>
</body>
</html>
函数onSubmit(){
var formData=new formData();
formData.append(“文件”,document.forms[“userForm”].file.files[0]);
append('user',新Blob([JSON.stringify({
“firstName”:document.getElementById(“firstName”).value,
“lastName”:document.getElementById(“lastName”).value
})], {
类型:“application/json”
}));
var boundary=Math.random().toString().substr(2);
获取(“/upload”{
方法:“post”,
正文:formData
}).然后(功能(响应){
如果(response.status!==200){
警报(“出现错误!”);
}否则{
警报(“请求成功”);
}
}).catch(函数(err){
警报(“出现错误!”);
});;
}
文件:
名字:
姓氏:
@RequestMapping(值={/test},方法={RequestMethod.POST})
@应答器
公共字符串创建(@RequestParam(“文件”)多部分文件、@RequestParam字符串描述、@RequestParam ArrayList sharers)引发异常{
ExpensePostDto ExpensePostDto=新的ExpensePostDto(文件、说明、共享者);
//做你的事
返回“测试”;
}
这似乎是最简单的解决方法,其他方法可以是添加您自己的messageConverter。您必须通过将
consumes=“multipart/form data”
添加到RequestMapping
注释来告诉spring您正在使用multipart/form data
。同时从expenseDto
参数中删除RequestBody
注释
@RequestMapping(path = "/{groupId}", consumes = "multipart/form-data", method = RequestMethod.POST)
public ExpenseSnippetGetDto create(ExpensePostDto expenseDto,
@PathVariable long groupId, Principal principal, BindingResult result)
throws IOException {
//..
}
将ExpensePostDto
过账后,请求中的标题将被忽略
编辑
您还需要将内容类型更改为multipart/formdata
。根据其他一些答案,这似乎是post
的默认设置。为了安全起见,我将具体说明:
'Content-Type': 'multipart/form-data'
将其从反应器前端拆下:
'Content-Type': 'application/json'
修改Java端控制器:
@PostMapping("/{groupId}")
public Expense create(@RequestParam("image") MultipartFile image, @RequestParam("amount") double amount, @RequestParam("description") String description, @RequestParam("title") String title) throws IOException {
//storageService.store(file); ....
//String imagePath = path.to.stored.image;
return new Expense(amount, title, description, imagePath);
}
@RequestMapping(value = "/upload", method = RequestMethod.POST, consumes = { "multipart/form-data" })
@ResponseBody
public boolean uploadImage(@RequestPart("obj") YourDTO dto, @RequestPart("file") MultipartFile file) {
// your logic
return true;
}
这可以写得更好,但我尽可能地保持它与原始代码尽可能接近。我希望它能有所帮助。我有一个类似的用例,我上传了一些JSON数据和图像(把它想象成一个试图注册个人详细信息和配置文件图像的用户)
参考@Stephan和@GSSwain的回答,我想出了一个使用Spring Boot和AngularJs的解决方案
下面是我的代码的快照。希望它能帮助别人
var url = "https://abcd.com/upload";
var config = {
headers : {
'Content-Type': undefined
}
}
var data = {
name: $scope.name,
email: $scope.email
}
$scope.fd.append("obj", new Blob([JSON.stringify(data)], {
type: "application/json"
}));
$http.post(
url, $scope.fd,config
)
.then(function (response) {
console.log("success", response)
// This function handles success
}, function (response) {
console.log("error", response)
// this function handles error
});
和SpringBoot控制器:
@PostMapping("/{groupId}")
public Expense create(@RequestParam("image") MultipartFile image, @RequestParam("amount") double amount, @RequestParam("description") String description, @RequestParam("title") String title) throws IOException {
//storageService.store(file); ....
//String imagePath = path.to.stored.image;
return new Expense(amount, title, description, imagePath);
}
@RequestMapping(value = "/upload", method = RequestMethod.POST, consumes = { "multipart/form-data" })
@ResponseBody
public boolean uploadImage(@RequestPart("obj") YourDTO dto, @RequestPart("file") MultipartFile file) {
// your logic
return true;
}
您的内容类型不正确,FormData不生成application/json
我将其更改为multipart/form data
,但我仍然收到相同的错误。这正是您需要的:我仍然收到相同的错误。你的endpoi