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How to call java class method in javascript using ajax?

I have a java class ::

package MyPackage;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import com.google.gson.Gson;

public class PopulateTextbox {

    Gson gson = new Gson();
    JSONObject obj = new JSONObject();
    JSONArray arr = new JSONArray();
    String temp1;

    String temp;
    List <String>rowValues = new ArrayList<String>();
    List <Integer>rowValues1 = new ArrayList<Integer>();
    String[] contactListNames;
    Connection con=null;
    Statement st=null;
    ResultSet rs=null;


    public String method(){


        try{


        String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
        Class.forName(driver);

        String db = "jdbc:odbc:Practice_Database";
        con = DriverManager.getConnection(db,"","");

        st = con.createStatement();
        String sql = "SELECT Emp_Name,ID,Email_Add FROM EmployeeSearch";
        rs = st.executeQuery(sql);

        while(rs.next()){
            obj.put("ID", rs.getInt("ID"));
            obj.put("Names",rs.getString("Emp_Name"));
            obj.put("Email", rs.getString("Email_Add"));
            arr.add(obj);

        }
        //obj.accumulate("ID",rowValues1);

        //obj.accumulate("Names",rowValues);
        temp1 = arr.toString();
        System.out.println(temp1);

   }catch(Exception e){System.out.println(e);}
    /*finally{
        try {
                if(con!=null)con.close();
            } catch (SQLException e) {

                e.printStackTrace();
            }
        try {
            if(rs!=null)rs.close();
        } catch (SQLException e) {

            e.printStackTrace();
        }try {
            if(st!=null)st.close();

        } catch (SQLException e) {

            e.printStackTrace();
        }


    }*/
        return temp1;

    }
    public static void main(String args[])
    {
        PopulateTextbox obj = new PopulateTextbox();
        String temp1= obj.method();


    }
}

This returns me a Json array. Now I want to call the method () of this class in JavaScript again and again to get new values ​​when updating my database. I have a data grid that works fine since the page loads for the first time with a set of values ​​in this json array. But how to update data using Ajax. Or how to call the () method using Ajax so that the data is updated when I click the button on the page. The code in which I call this method in java-script is ::

<%

    String temp1;
    PopulateTextbox obj = new PopulateTextbox();
    temp1 = obj.method();
    %>

I get a problem when getting a new set of values ​​in temp1 via an Ajax call to the server. please help? Thank you

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3

JSP (, textBoxAjaxResp.jsp) JSON JSP:

<%

String temp1;
PopulateTextbox obj = new PopulateTextbox();
temp1 = obj.method();
%>

<%=temp1 %>

JSP jQuery AJAX.

$.get("mypath/textBoxAjaxResp.jsp", function (response) {
    //do operation using the response
}, "json");
+4

Direct Web Remoting java- javascript

servlet ( , , 3.0, ) ( DWR, , , ) JSON.

+1

You might want to see my answer here Updating the contents of a jsp page without updating . It uses the SpringMVC class, which returns a text value from the server side to the client side using jquery ajax.

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