HTTP Servlet Methods

• doGet()
• doPost()
• doHead()
• doPut()
• doDelete()
• doOptions()
• doTrace()

Get Method:

• The GET method sends the encoded user information appended to the page request in the URL.
• The page and the encoded information are separated by the ? character as follows:

                        http://www.test.com/hello?key1=value1&key2=value2

• The GET method has size limtation: only 1024 characters can be in a request string.  

       Signature of the doGet() method:
            public void doGet(HttpServletRequest request, HttpServletResponse 
                  response) throws ServletException, IOException {
                           // Servlet code
            }

Note: Never use get method to pass password or other sensitive information.

Post Method:

• More reliable method of passing information is the POST method.
• Post method also packages the information exactly the same way as GET methods, but instead of sending it in the URL, it sends it as a separate message.
• There is no limitation for the Post method.

       Signature of the doPost() method:
           public void doPost(HttpServletRequest request, HttpServletResponse response)    
                throws ServletException, IOException {
                        // Servlet code
           }