How to read Json object in spring mvc controller

Question

What is the most elegant way to read JSON objects in spring mvc when you have only 1 parameter.

When I have many I create an object that will read the post request sent by ajax but in this case, given the fact I am only sending the username parameter, it seems very ugly.

var dataObject = JSON.stringify({
    'username' : 'quentin'
});

$.ajax({
    url : ctx + '/users/edit',
    type : 'POST',
    beforeSend : function(xhr) {
        xhr.setRequestHeader(header, token);
    },
    data : dataObject
});

An attempt is

@RequestMapping(value = "/users/edit", method = RequestMethod.POST)
public String editUser(@RequestBody String username) {

    System.out.println(username);
    return "users/edit";
}

This is obviously wrong and gives the below as result

%7B%22username%22%3A%22quentin%22%7D=

Gurkan Yesilyurt · Accepted Answer · 2015-12-18 21:41:39Z

1

Please check your content-type Try one of the two.

$.ajax({
        url :'/users/edit',
        type : 'POST',
        contentType: "application/json", //either
        beforeSend: function(xhr) {
         //xhr.setRequestHeader("Content-Type", "application/json"); //or
        },
        data : dataObject,
        success: function(data) {

        }  
});

Before

%7B%22username%22%3A%22quentin%22%7D=

After

{"username":"quentin"}

answered Dec 18, 2015 at 21:41

Gurkan Yesilyurt

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