Get all Request Parameters in Servlet

Get all Request Parameters in Servlet

• Use HttpServletRequest.getParameterNames to get an Enumeration of parameter names.
• Use HttpServletRequest.getParameterValues(paramName) to get the parameters values.

package com.javanotes2all.servlet;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Enumeration;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class GetAllRequestParametersInServlet extends HttpServlet {

private static final long serialVersionUID = -2128122335811219481L;

public void doGet(HttpServletRequest req, HttpServletResponse res) throws IOException {

handleRequest(req, res);

}

public void doPost(HttpServletRequest req, HttpServletResponse res) throws IOException {

handleRequest(req, res);

}

public void handleRequest(HttpServletRequest req, HttpServletResponse res) throws IOException {

PrintWriter out = res.getWriter();

res.setContentType("text/plain");

Enumeration<String> parameterNames = req.getParameterNames();

while (parameterNames.hasMoreElements()) {

String paramName = parameterNames.nextElement();

out.write(paramName);

out.write("n");

String[] paramValues = req.getParameterValues(paramName);

for (int i = 0; i < paramValues.length; i++) {

String paramValue = paramValues[i];

out.write("t" + paramValue);

out.write("n");

}

}

out.close();

}

}