将PHP开发的后端更改为Java spring boot

I am not sure if this question gonna be considered as duplicated or not, but I wasn't able to find my answer even by googling or through out the QA suggested topics on the SOF. So here I go asking my question:

I have developed a website with Javascript, PHP , AJAX that's using JSON to talk to eachother. And now the client is asking me to change all PHP backend to Spring Boot. That means I gonna talk to the HTML and Javascript and MySql using Java EE Spring Boot and I am not sure how I gonna do it. My main problems are:

1- Is it possible to parse data from Java to the jQuery using JSON ? I mean I retrive data from the MySql and then send it back to the .php file.

The PHP example would be:

$myJSON = json_encode($myObj);
echo $myJSON;

2- Is it possible to get the parsed the respons from the JAVA through the jQuery :

jQuery.ajax({

        type:"post",
        dataType:"json",
        url: myAjax.ajaxurl,
        data: {action: 'submit_data', info: info},
        success: function(getParsedVAL) {
           // the variable getParsedVAL is comming from the JAVA file
            successmessage = 'Data was succesfully captured';
            $("label#successmessage").text(successmessage);
        },
        error: function(getParsedVAL) {
           // the variable getParsedVAL is comming from the JAVA file
            successmessage = 'Error';
            $("label#successmessage").text(successmessage);
        },
    });
success: function(getParsedVAL) {
    // the variable getParsedVAL is comming from the JAVA file
    successmessage = 'Data was succesfully captured';
}      

I’m actually transitioning to spring boot from php. Spring boot actually encodes the java object to json automatically. If you developed the back end with some lightweight framework with routing and model controller structure you can easily convert it to spring boost