How To Get POST Data W/ Servlet?

[beefeater267]

Hi,

I need to create a JAVA Servlet which just needs to capture HTTP POST data coming from another web application.

How do you retrieve HTTP POST data w/ a Java Servlet? For example, support I have a form w/ a text box named 'job'. When the data is posted via HTTP to the servlet, how can i get the value of 'job'?

thanks

 

[sedj]

Write a class that extends HttpServlet, and implement the method "doPost()".

Then within that method, write :

String job = request.getParameter("job");

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[beefeater267]

What's the difference between the implementations of

doPost() and doGet()

 

[sedj]

Well, maybe its not as obvious as it seems ...

doPost() handles the HTTP POST instruction.

and doGet() handles the HTTP GET instruction.

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[beefeater267]

So, does: "doPost()" and "doGet()" always get executed? It seems confused b/c my servlet is not the application doing the posting. It is simply retreiving information that was posted to it.

I would have thought it would need to implement 'doGet()' because we are 'getting' the values that were posted to it.

So, anyways, if a browser was pointed to:

http://myservlet?job=doctor

then, would i have to implement 'doGet()'?

 

[Diancecht]

You can just call doPost from doGet, that'd do the job.

Cheers,
Dian

 

[sedj]

Well lets get a couple of things straight.
First, your post asked how to handle an HTTP POST instruction. This is handled by the doPost() method, and GET is handled by doGet(), as I said before.

There are two methods, because some applications may only want to handle one or the other.
However, most applications put the actual logic in one method, and redirect to the other.

Eg :

doGet(HttpServletRequest request, HttpServletResponse response) {
  doPost(request, response);
}


doPost(HttpServletRequest request, HttpServletResponse response) {
  String job = request.getParameter("job");

}

This is probably how you should do it aswell, aslong as you don't care whether the client is sending a GET or POST instruction.

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