How do I get web application context path?

By Wayan in Servlet 0 Comment

The context path always comes first in a request URI. The path starts with a “/” character but does not end with a “/” character. When I have a web application with the URL like http://localhost:8080/myapp` then/myapp` is the context path.

For servlets in the default (root) context, this method returns "" (empty string).

package org.kodejava.servlet;

import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import java.io.IOException;
import java.io.PrintWriter;

@WebServlet(urlPatterns = "/context-path")
public class ContextPathDemo extends HttpServlet {
    protected void doGet(HttpServletRequest req, HttpServletResponse res)
            throws ServletException, IOException {

        // HttpServletRequest.getContextPath() returns the portion 
        // of the request URI that indicates the context of the 
        // request.
        String contextPath = req.getContextPath();

        PrintWriter pw = res.getWriter();
        pw.print("Context Path: " + contextPath);
    }
}

You’ll get the following information in your browser:

Context Path: /webapp

Maven dependencies

<!--https://search.maven.org/remotecontent?filepath=javax/servlet/javax.servlet-api/4.0.1/javax.servlet-api-4.0.1.jar-->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>4.0.1</version>
</dependency>

Maven Central

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