springboot使用form-data上传文件的同时接收json参数_springboot中controller接收参数设置为fromdata

作者：繁依Fanyi0 | 2024-04-05 16:45:26

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springboot中controller接收参数设置为fromdata

如题，即在springboot项目中的restfull接口，参数使用多个RequestPart的解决方案。
前端代码

<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>
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后端代码

@RestController
@RequestMapping
public class UploadController {
	@PostMapping(value = "/upload", produces = MediaType.APPLICATION_JSON_VALUE, consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
	public ResponseData<SubmitDocResult> submit(@RequestPart("user") User user, @RequestPart(value = "file") MultipartFile file) {
		//TODO
	}
}	
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