如何在Java Servlet中使用JSON数据

Question

I am using knockout js and want to use json data to my servlet.i want to use it in my servlet but i am not able to how to get a value of a key of json data. my json data is

{"data":[{"BranchId":"xzc","Name":"zxc","Description":"zxc","Template":"Template1","MetaKeyword":"zxc","MetaDescription":"zxc","MetaTitle":"zxc","EnableSearch":"No"}]}

My js code is

self.SaveBranch = function () {
    $.ajax({
        type: "GET",
        url: '/bin/feed/currency',
        data: "BranchId="+ko.toJSON({ data: self.Branches }),
        contentType: "application/json; charset=utf-8",
        success: function (result) {
        var navTitle = result['Name'];
            alert(navTitle);
        },
        error: function (err) {
        alert(err.status + " - " + err.statusText);
    }
    });
};

in my servlet i am doing

String BranchId =(String)request.getParameter("BranchId");
JSONWriter writer = new JSONWriter(response.getWriter());
writer.object();
        writer.key("Name").value(BranchId.name() );
        writer.endObject();

i want to get the BranchID and Name in my servlet. How can i achieve this ?

Answer 1

You need to parse the parameter value being JSON. There are many Java libs to do so (Google GSON, Jackson, org.json, ...). According choosen lib your code will be something like:

JsObject branchId = Json.parse(request.getParameter("BranchId"));
String name = branchId.get("name");

Replace JsObject by type provided by JSON lib, same for .parse(...) and .get(...) .