How to Retrieve Client Input Data in Servlet

When client send some input data to the servlet, that data will be available in the form of request object.  We can retrieve that input data through HttpServletRequest or ServletRequest interfaces.  There are 4 approaches to retrieve the client data which is present in request object.

• public String getParameter(“input variable”);
• public Enumeration getParameterNames();
• public Map getParameterMap();
• public String[] getParamterValues(“input variable contains muliple values”);

All these methods are present in javax.servlet.ServletRequest interface, and HttpServletRequest is the sub interface of ServletRequest, ok let us see how to use these methods with an example 🙂

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::. About the Author .::
		Sivateja Kandula - Java/J2EE Full Stack Developer Founder of Java4s - Get It Yourself, A popular Java/J2EE Programming Blog, Love Java and UI frameworks. You can sign-up for the Email Newsletter for your daily dose of Java tutorials.