Servlet – Get URL Parameters in doGet()
This post shows you how to get URL parameters in Java Servlet doGet
method.
To do this, we simply use HttpServletRequest.getParameter
method like this:
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String value = request.getParameter("parameter-name");
}
Here is the full Servlet example.
PostServlet.java
package com.bytenota;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(name = "PostServlet", urlPatterns = {"/post"})
public class PostServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
PrintWriter out = response.getWriter();
// get post name value from url
String value = request.getParameter("name");
// print the result to view
if (value != null) {
out.write(value);
}
}
}
Assuming that, we run this Servlet page under the following URL: http://localhost:8080/WebApp/post?name=hello-world-program
The ouput result we should get is:
hello-world-program