所需的 MultipartFile 参数“文件”不存在 - MultipartyEntityBuilder

Question

我正在尝试使用 httpclient(Post) 将多方发送到在服务器中运行的 spring 模块。所以它是宁静的网络服务。但是我的代码抛出错误。你能帮帮我吗？

我已经尝试过了： Spring : File Upload RESTFUL Web Service

HTTPCLIENT 文件：（POST 请求）

public class MultiFile {
public static void main(String args[]) throws ClientProtocolException, IOException
{
CloseableHttpClient httpclient = HttpClients.createDefault();
HttpPost httppost = new HttpPost("http://localhost:8080/RESTapi/student/addimage");
File file = new File("/Users/prabhu-pt3030/Desktop/eclipse-workspace-new/testing/target/classes/tes/javaFile123.txt");
MultipartEntityBuilder entitybuilder = MultipartEntityBuilder.create();
FileBody filebody = new FileBody(file, ContentType.MULTIPART_FORM_DATA);
entitybuilder.addPart("files", filebody);
HttpEntity mutiPartHttpEntity = entitybuilder.build();  
httppost.setEntity(mutiPartHttpEntity); 
HttpResponse httpresponse = httpclient.execute(httppost);
}
}

弹簧控制器：

@RequestMapping(value="/student/addimage",method=RequestMethod.POST,headers = "content-type=multipart/form-data")
public  void Addingimage(@RequestParam(value="files") MultipartFile files)
{
 //System.out.println(files.isEmpty());
}

输出：

Required MultipartFile parameter 'files' is not present

Answer 1

我认为 ContentType 存在问题。

您的控制器找不到任何名称为“文件”的参数

试试这个

public class MultiFile {
    public static void main(String args[]) throws ClientProtocolException, IOException
    {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpPost httppost = new HttpPost("http://localhost:8080/RESTapi/student/addimage");
        File file = new File("/Users/prabhu-pt3030/Desktop/eclipse-workspace-new/testing/target/classes/tes/javaFile123.txt");
        MultipartEntityBuilder entitybuilder = MultipartEntityBuilder.create();
        FileBody filebody = new FileBody(file, ContentType.DEFAULT_BINARY);
        entitybuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
        entitybuilder.addPart("files", filebody);
        HttpEntity mutiPartHttpEntity = entitybuilder.build();  
        httppost.setEntity(mutiPartHttpEntity); 
        HttpResponse httpresponse = httpclient.execute(httppost);
    }
}

参考这里more detail