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Servlet Error - Checking Multiple Variables

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.mysql.jdbc.PreparedStatement;
/**
* Servlet implementation class Login
*/
#WebServlet("/Login")
public class Login extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* #see HttpServlet#HttpServlet()
*/
public Login() {
super();
// TODO Auto-generated constructor stub
}
/**
* #see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.getWriter().append("Served at: ").append(request.getContextPath());
}
/**
* #see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
Connection conn = null;
String url="jdbc:mysql://localhost:3306/";
String dbName="Tamir";
String driver="com.mysql.jdbc.Driver";
try{
request.setAttribute("message", "");
String nick = request.getParameter("check_name");
String password = request.getParameter("check_password");
Class.forName(driver).newInstance();
conn = DriverManager.getConnection(url+dbName,"root", "tamir");
//admin check
/*
java.sql.PreparedStatement st2 = conn.prepareStatement("SELECT * FROM users WHERE nickname = ? or email = ? and password = ? and admin = T");
st2.setString(1, nick);
st2.setString(2, nick);
st2.setString(3, password);
ResultSet r2=st2.executeQuery();
if(r2.next()) {
request.getSession().setAttribute("admin", nick);
}
*/
//regular check
java.sql.PreparedStatement st = conn.prepareStatement("SELECT * FROM users WHERE nickname = ? or email = ? and password = ?");
st.setString(1, nick);
st.setString(2, nick);
st.setString(3, password);
ResultSet r1=st.executeQuery();
if(r1.next()) {
request.getSession().setAttribute("user", nick);
request.getRequestDispatcher("/tf2main.jsp").forward(request, response);
} else {
request.setAttribute("message", "Username or password are incorrect.");
request.getSession().setAttribute("user", null);
request.getRequestDispatcher("/Login.jsp").forward(request, response);
}
}catch (Exception ex) {
System.out.println("Error");
}
}
}
Hello. So I've made the code above and it is working perfectly, but when I add the comment [which I really need, in order to check if he's an admin... Cruical for me] it just throws the exception for some reason.
The only other souloution I've thought about was redricting to another servlet, doing the same action somehow but that's impossible so I'm kinda stuck, you also can't use ERB.
I've tried everything and nothing works.
Edit: The error being throwed is:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'T' in 'where clause'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at com.mysql.jdbc.Util.getInstance(Util.java:408)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:943)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3973)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3909)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2527)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2680)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2487)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1858)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1966)
at Login.doPost(Login.java:68)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Update the query to be something like:
java.sql.PreparedStatement st2 =
conn.prepareStatement("SELECT * FROM users WHERE nickname = ? or email = ? and password = ? and admin = 'T'");
Note the single quote marks around the T in the query.

file not found exception while running through servlet

Hi am new to java so facing some issue,i am hitting servlet from a html page where it is calling different method from different class, but while executing method of class from servlet it is throwing the file not found exception.but everything is present in correct path. while running method of class separately its working fine but from servlet it is not
SEVERE: Servlet.service() for servlet [Search] in context with path [/AutomationTest] threw exception
java.io.FileNotFoundException: WebContent\prop\html.txt (The system cannot find the path specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileReader.<init>(Unknown Source)
at com.helix.etl.automation.dao.test.read(test.java:24)
at com.helix.etl.automation.controller.Search.doGet(Search.java:45)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:957)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
my test.java
public class test {
//String filenaame="WebContent/prop/html.txt";
/*public static void main(String[] args) throws IOException{
test t= new test();
t.read(filenaame);
}*/
String line="";
public List<String> read(String filename) throws IOException
{
File file =new File(filename);
FileReader fi = new FileReader(file);
BufferedReader in = new BufferedReader(fi);
List<String> tokens = new ArrayList<String>();
while((line=in.readLine())!=null){
tokens.add(line);
System.out.println("entering");
}
return tokens;
}
my servlet
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String Filename="WebContent/prop/html.txt";
test t = new test();
List<String> line=t.read(Filename);
for (String s : line) {
System.out.println(s);
out.print(s);}
}

error: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver?

I am trying simple login authentication using servlets and jdbc connection to MySQL database. After executing it on tomcat server I am getting following error:
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at com.leader.prog.Validate.checkUser(Validate.java:13)
at com.leader.servlet.Login1.doPost(Login1.java:42)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2466)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2455)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
I am sharing the content of all files:
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<servlet-name>login</servlet-name>
<servlet-class>com.leader.servlet.Login1</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>login</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>welcome</servlet-name>
<servlet-class>com.leader.servlet.Welcome</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>welcome</servlet-name>
<url-pattern>/welcome</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>Home.html</welcome-file>
</welcome-file-list>
</web-app>
Login1.java
package com.leader.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.leader.*;
import com.leader.prog.Validate;
#WebServlet("/Login1")
public class Login1 extends HttpServlet {
/**
* #see HttpServlet#HttpServlet()
*/
public Login1() {
super();
// TODO Auto-generated constructor stub
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
String user = request.getParameter("userName");
String pass = request.getParameter("password");
if(Validate.checkUser(user.toString(),pass.toString()))
{
RequestDispatcher rs = request.getRequestDispatcher("Welcome");
rs.forward(request, response);
}
else
{
out.println("Username or Password incorrect");
RequestDispatcher rs = request.getRequestDispatcher("Home.html");
rs.include(request, response);
}
}
}
validate.java
package com.leader.prog;
import java.sql.*;
public class Validate
{
public static boolean checkUser(String user,String pass)
{
boolean st =false;
try{
//loading driver
Class.forName("com.mysql.jdbc.Driver");
//creating connection with the database
Connection con=DriverManager.getConnection
("jdbc:mysql://localhost:3306/person","root","password");
PreparedStatement ps =con.prepareStatement
("select * from person where pid=? and password=?");
ps.setString(1, user);
ps.setString(2, pass);
ResultSet rs =ps.executeQuery();
st = rs.next();
}catch(Exception e)
{
e.printStackTrace();
}
return st;
}
}
Please help me to get out of this issue.

Check the availability of mysql driver is in classpath. If you are using IDE(eclipse) try to add it to build path.

You should add Mysql connector library you your project buildpath
You can download library from
http://dev.mysql.com/downloads/connector/j/5.0.html
or
http://www.java2s.com/Code/Jar/c/Downloadcommysqljdbc515jar.htm

java.lang.ClassNotFoundException: com.mysql.jdbc.driver error with jar file already imported

I have been searching all around for a solution to my problem and the only solution i have found is to add the jar file that i already have. This is done in eclipse EE and is useing tomcat.
I am running a different HTML file which links to this piece of code once a button is pressed, if you want that code feel free to ask, but there is almost nothing on it.
I keep getting the error "java.lang.ClassNotFoundException: com.mysql.jdbc.driver" along with 100 other lines which i'm not sure are conencted.
Here is what i have:
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class HelloForm
*/
#WebServlet("/test5")
public class test5 extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* #see HttpServlet#HttpServlet()
*/
public test5() {
super();
// TODO Auto-generated constructor stub
}
/**
* #see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// TODO Auto-generated method stub
String url = "jdbc:mysql://localhost:3306/";
String dbName = "test";
String driver = "com.mysql.jdbc.driver";
String userName = "root";
String password = "games10";
try {
Class.forName(driver).newInstance();
Connection conn = (Connection) `enter code here`DriverManager.getConnection(url+dbName,userName,password);
Statement stat = conn.createStatement();
//stat.execute("CREATE TABLE test (Name CHAR(20))");
stat.execute("INSERT INTO TEST VALUES('"+request.getParameter("first_name")+"')");
conn.close();
System.out.println("Working");
}
catch (Exception e) {
e.printStackTrace();
}
}
/**
* #see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
}
I apolagize if i have posted the code wrong, ive never used this site before and am tired.
As i have said i have imported the "mysql-connector-java-5.1.30-bin.jar" file. All help is accepted with open arms and critisism also.
Thank you for your time
Errors in case it's not actually related to the driver:
java.lang.ClassNotFoundException: com.mysql.jdbc.driver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at test5.doGet(test5.java:59)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2441)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2430)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

After importing the jar, you have to add it to the build path of your project.
right click on jar file -> build path ->add to build path

You've misspelt the class name, but you don't need it. Just remove that line. It's been obsolete for years, since JDBC 4.0.

I found the problem. I needed a uppercase D in String driver = "com.mysql.jdbc.driver";
God I feel stupid now

Java calling one servlet from two sources

I'm making a Java web-application with an user profile.
I have a profileServlet which is responsible for rendering two pages: profile.jsp and editProfile.jsp
The first source, from which profileServlet is being called, is a menu link on top of the page, and look like this:
Profile
The second source is a "Edit" button in the profile.jsp:
<form name="editProfile" method="GET" action="profileServlet?param=editProf"><input type="submit" value="Edit"></form>
Now in profileServlet, depending on the param value I want to make redirect either to profile.jsp or editProfile.jsp. Here is the code:
if(request.getParameter("param").equals("profile")) {
response.sendRedirect("profile.jsp");
} else if (request.getParameter("param").equals("editProf")) {
response.sendRedirect("editProfile.jsp");
}
But I keep getting java.lang.NullPointerException.
Could you help please?
Stacktrace:
24.04.2014 11:44:30 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [profilePage.profileServlet] in context with path [/LinkedIn] threw exception
java.lang.NullPointerException
at profilePage.profileServlet.doGet(profileServlet.java:126)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:315)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Your request parameter param is probably null, you can either do it like below, or have proper null checking in place before using your variables
if ("profile".equals(request.getParameter("param")) {
response.sendRedirect("profile.jsp");
} else if ("editProf".equals(request.getParameter("param")) {
response.sendRedirect("editProfile.jsp");
}
Additionally, ensure that the code is place in their respective doGet/doPost handlers, or have one handler for both.
Example:
#Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) {
handleGetAndPost(request, response);
}
#Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) {
handleGetAndPost(request, response);
}
private void handleGetAndPost(HttpServletRequest request, HttpServletResponse response) {
if ("profile".equals(request.getParameter("param")) {
response.sendRedirect("profile.jsp");
} else if ("editProf".equals(request.getParameter("param")) {
response.sendRedirect("editProfile.jsp");
}
}

you should use a post request when submitting a form, and have two different handler methods.
GET returns the empty form, and POST processes the submitted form.

Better add null checks. Looks like you are not able to get param
if (request.getParameter("param") != null && request.getParameter("param").equals("profile")) {
response.sendRedirect("profile.jsp");
} else if (request.getParameter("param") != null && request.getParameter("param").equals("editProf")) {
response.sendRedirect("editProfile.jsp");
}