POST method and passing parameters
Step 1: Passing data using parameters in GET method:
package com.gs.controller;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class XmlServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println("Hello from Get method of XML servlet");
response.setContentType("text/html");
String userName = request.getParameter("userName");
PrintWriter printWriter = response.getWriter();
printWriter.println("Hello from GET method "+userName);
}
}Step 2: Hit the URL and add the parameter as "?userName=Mohit"
Step 3: In order to test POST create a simple html form:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
Hello World
<form method="post" action="xmlservletpath">
<input name="userName" />
<input type="submit" />
</form>
</body>
</html>Step 4: Create doPost method in servlet:
package com.gs.controller;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class XmlServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println("Hello from Get method of XML servlet");
response.setContentType("text/html");
String userName = request.getParameter("userName");
PrintWriter printWriter = response.getWriter();
printWriter.println("Hello from GET method " + userName);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println("Hello from POST method of XML servlet");
response.setContentType("text/html");
String userName = request.getParameter("userName");
PrintWriter printWriter = response.getWriter();
printWriter.println("Hello from POST method " + userName);
}
}
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