An Introduction to Jython

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Examples - Servlets

Java

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class HelloWorldServlet extends HttpServlet {
  public void doGet(HttpServletRequest request, HttpServletResponse response) {
    response.setContentType("text/html");
    try {
      PrintWriter out = response.getWriter();
      out.println( 
        "<html>"
        + "<head><title>Hello World Servlet</title></head>"
        + "<body>Hello World Servlet at " + new Date() + "</body>"
        + "</html>"
      );
    } catch (IOException e) {
      // now what?
    }
  }
}

HelloWorldServlet.java

Jython

PyServlet (included with Jython) is registered to handle all requests for files with .py extension. The servlet loads the .py file and executes it. All code is written in Python.

from javax.servlet.http import HttpServlet
from java.util import Date

class HelloWorldServlet(HttpServlet):
  def doGet(self, req, res):
    res.setContentType("text/html");
    out = res.getOutputStream()

    print >> out, ("<html>"                   
                   "<head><title>Hello World Servlet</title></head>"
                   "<body>Hello World Servlet at %s<body>"
                   "</html>" % Date())    
    out.close()
    return

HelloWorldServlet.py