如何使用Ajax通过url传递键值对？

我想在我的页面上使用Ajax，并通过url传递键值对设置。

xhttp.open("POST", "/ajax/myjsp.jsp?str=key1=value1|key2=value2" , true);

在执行myjsp.jsp上的request.getParameters(“str”)时，它应该给key 1=value 1 x key2=value 2。

It worked as it is posted in my question.The error was it was not getting ajax file path.Just removed / in the beginning and it worked.

function myFunction() {
    var uri = "/ajax/myjsp.jsp?str=key1=value1|key2=value2";
    var res = encodeURI(uri);
    document.getElementById("demo").innerHTML = res;
}

<p>Click the button to encode a URI.</p>

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

</div>