如何在不使用Form Tag的情况下将文本字段值从Jsp页面传递给Spring Controller

Question

I have 3 fields like Name, Age, Address and it has a default value that's coming from a database, now I want to edit or update each field value using the edit button, so I want to pass field edit value from jsp to spring controller.

<input type="text" value="${map.Fname}" id="nameEdit" disabled>
<input type="button" class="btn btn-outline-default float-right btn-sm" value="Edit" onclick="nameEdit()">
<input type="submit" value=submit>

Here I have two buttons edit is for to edit the default value another submit button for to submit the value which is entered in the text field.

Answer 1

If you don't want to use Form other way would be using POST call from jQuery or JavaScript

Let's assume your Rest Controller looks like this

@PostMapping("/save")
public void saveDetail(@RequestBody UserDetail data){

}

since you don't want to use form you can replace type submit with button like this

<input type="button" value="submit" id="btnSubmit">

POST call using jQuery

var data = {
   "fname" : "Test",
   "lname" : "Test",
}

$.ajax({
  type: "POST",
  url: url,
  data: data,
  success: success,
  dataType: "application/json"
});

Using JavaScript

var xhr = new XMLHttpRequest();
var url = "url";
xhr.open("POST", url, true);
xhr.setRequestHeader("Content-Type", "application/json");
xhr.onreadystatechange = function () {
    if (xhr.readyState === 4 && xhr.status === 200) {
        var json = JSON.parse(xhr.responseText);
        console.log(json.email + ", " + json.password);
    }
};
var data = JSON.stringify(data );
xhr.send(data);