RequestBody handling a JSON containing Strings and a List-CodePudding

I'm sending a post request from the client to the server. The body of the post request looks like this:

        ...
        body: JSON.stringify
            ({
                command: 'someString',
                dataFields: setDataList()
            })
        ...

while the "setDataList()" returns the following structure: [ {…}, {…}, {…}, ..., {…} ]

        [0: {type: "_header_", label: "upload"}
        1: {type: "_image_", name: "data:image/jpeg;base64", value: "base64 encoded string", label: "someImage.JPG"}
        2: {...}]

I'm having issues processing the content of the "dataFields" key at the server. Currently, the SpringBoot applicaiton looks like this:

@PostMapping(
consumes = {MediaType.APPLICATION_JSON_VALUE, MediaType.APPLICATION_XML_VALUE},
produces = {MediaType.APPLICATION_JSON_VALUE})
public void postBody(@RequestBody ManageRequest manageRequest) {
  ...
}

and "ManageRequest" like this:

import java.util.List;

public class ManageRequest {
  private String accountId;
  private String command;
  private String transactionId;
  private List<String> dataFields;

  public String getAccountId() {
    return accountId;
  }

  public String getTransactionId() {
    return transactionId;
  }

  public void setTransactionId(String transactionId) {
    this.transactionId = transactionId;
  }

  public void setAccountId(String accountId) {
    this.accountId = accountId;
  }

  public String getCommand() {
    return command;
  }

  public void setCommand(String command) {
    this.command = command;
  }

  public List<String> getDataFieldList() {
    return dataFields;
  }

  public void setDataFieldList(List<String> dataList) {
    this.dataFields = dataList;
  }

}

I'm not experienced in handling such requests with Java. My goal would be to extract the content of the "dataFields" like this: "dataFields[0], dataFields[1], ..." and allocate them to a new List to add to a post request. At the moment, the list seems to be empty when arriving at the end point.

CodePudding user response：

Your problems is with the List. The server is waiting for a List of Strings but you are sending a List of objects with fields that are Strings.

private List<String> dataFields; // This property is a List of string not a list of "dataFields"

You should create a class DataField and it would looks like this

public class DataField{
    
    private String type;
    private String label;
    private String name;
    .
    .
    .

}

And then in your ManageRequest class you should do like this:

 public class ManageRequest {
    private String accountId;
    private String command;
    private String transactionId;
    private List<DataField> dataFields;

    //Getter and setters
}