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shashirajrajashashirajraja
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‎Advanced-Java-J2EE-Notes/Servlet_Notes/.classpath

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<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/>
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<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/>
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<classpathentry kind="lib" path="C:/Tomcat/apache-tomcat-9.0.62/lib/servlet-api.jar"/>
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<classpathentry kind="lib" path="D:/Apps/sqldeveloper/jdbc/lib/ojdbc8.jar"/>
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<classpathentry kind="output" path="build/classes"/>
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</classpath>

‎Advanced-Java-J2EE-Notes/Servlet_Notes/.project

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<nature>org.eclipse.jdt.core.javanature</nature>
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<nature>org.eclipse.wst.jsdt.core.jsNature</nature>
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</natures>
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<linkedResources>
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<link>
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<name>src/main/webapp/WEB-INF/lib/ojdbc8.jar</name>
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<type>1</type>
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<location>D:/Apps/sqldeveloper/jdbc/lib/ojdbc8.jar</location>
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</link>
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</linkedResources>
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</projectDescription>

‎Advanced-Java-J2EE-Notes/Servlet_Notes/src/main/java/application.properties

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username=system
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password=root
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driverName = oracle.jdbc.driver.OracleDriver
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connectionString=jdbc:oracle:thin:@localhost:1521:orcl

‎Advanced-Java-J2EE-Notes/Servlet_Notes/src/main/java/com/dayone/FirstGenericServlet.java

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@@ -37,8 +37,9 @@ public void service(ServletRequest req, ServletResponse res) throws ServletExcep
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res.setContentType("text/html"); //Set the content type of the web page
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PrintWriter pw = res.getWriter(); //Get the pen to write on the web page
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pw.println("Hello Guys!!!"); // prints anything on the web page
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pw.println("<h1>Welcome to Bitter Code</h1>");
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pw.println("<h1>Welcome to Bitter Code");
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pw.println("<a href='index.html'><button>Go Back</button></a>");
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req.getParameter("keyName");
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}
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}

‎Advanced-Java-J2EE-Notes/Servlet_Notes/src/main/java/com/daythree/DemoServletConfig.java

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package com.daythree;
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import java.io.IOException;
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import java.io.PrintWriter;
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import javax.servlet.GenericServlet;
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import javax.servlet.ServletConfig;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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public class DemoServletConfig extends GenericServlet {
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/**
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*
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*/
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private static final long serialVersionUID = 1L;
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@Override
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public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
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ServletConfig servletConfig = this.getServletConfig();
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String refralName = servletConfig.getInitParameter("refralName");
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String clientName = req.getServletContext().getInitParameter("clientName");
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res.setContentType("text/html");
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PrintWriter pw = res.getWriter();
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pw.println("Welcome " + refralName);
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pw.println("<br>Client: " + clientName);
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}
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}

‎Advanced-Java-J2EE-Notes/Servlet_Notes/src/main/java/com/daythree/DemoServletContext.java

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package com.daythree;
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import java.io.IOException;
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import java.io.PrintWriter;
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import javax.servlet.GenericServlet;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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public class DemoServletContext extends GenericServlet{
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/**
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*
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*/
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private static final long serialVersionUID = 1L;
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@Override
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public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
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ServletContext servletContext= req.getServletContext();
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String clientName = servletContext.getInitParameter("clientName");
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res.setContentType("text/html");
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PrintWriter pw = res.getWriter();
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pw.println("Welcome "+ clientName);
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}
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}

‎Advanced-Java-J2EE-Notes/Servlet_Notes/src/main/java/com/daytwo/LoginServletGetParams.java

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package com.daytwo;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.sql.Connection;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import javax.servlet.GenericServlet;
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import javax.servlet.RequestDispatcher;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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import com.util.DBUtil;
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public class LoginServletGetParams extends GenericServlet{
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/**
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*
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*/
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private static final long serialVersionUID = 1L;
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@Override
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public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
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res.setContentType("text/html");
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PrintWriter pw = res.getWriter();
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//req.getParameter
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String email = req.getParameter("email");
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String password = req.getParameter("pwd");
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pw.println("Hello "+email +", wait while we are checking your credentials..<br>");
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boolean isLoginSuccess = false;
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//isLoginSuccess = email.equals("shashi@gmail.com") && password.equals("shashi");
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Connection connection = DBUtil.getConnection();
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if(connection == null) {
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pw.println("<br>Server is down, try after some time!!");
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return;
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}
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String sqlQueryToCheckIfCustomerExistsWithReceivedEmailAndPassword = "select * from customer where email = ? and password = ?";
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try {
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PreparedStatement ps = connection.prepareStatement(sqlQueryToCheckIfCustomerExistsWithReceivedEmailAndPassword);
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ps.setString(1, email);
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ps.setString(2, password);
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ResultSet rs = ps.executeQuery();
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if(rs.next()) {
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isLoginSuccess = true;
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String id = rs.getString("id");
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String name = rs.getString("name");
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String dob = rs.getString("dob");
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email = rs.getString("email");
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String mob = rs.getString("mob");
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String gender = rs.getString("gender");
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pw.println("<ul>"
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+ "<li>Name: "+name+"</li>"
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+ "<li>Id: "+id+"</li>"
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+ "<li>Email: "+email+"</li>"
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+ "<li>DOB: "+dob+"</li>"
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+ "<li>Mob: "+mob+"</li>"
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+ "<li>Gender: "+gender+"</li>"
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+ "</ul>");
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} else {
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isLoginSuccess = false;
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}
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} catch (SQLException e) {
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isLoginSuccess = false;
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e.printStackTrace();
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}
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if(isLoginSuccess) {
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//login success
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pw.println("<h1>User Login Success</h1>");
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//Request Dispatcher
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RequestDispatcher rd = req.getRequestDispatcher("welcome.html");
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rd.forward(req, res);
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} else {
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//login failure
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pw.println("<h2>Invalid Credentials, Try Again!!<br>");
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//Request Dispatcher
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RequestDispatcher rd = req.getRequestDispatcher("login.html");
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rd.include(req, res);
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}
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}
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}
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‎Advanced-Java-J2EE-Notes/Servlet_Notes/src/main/java/com/daytwo/LoginServletGetParamsUsingBeans.java

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package com.daytwo;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.sql.Connection;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import javax.servlet.GenericServlet;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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import com.daytwo.bean.Customer;
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import com.util.DBUtil;
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public class LoginServletGetParamsUsingBeans extends GenericServlet {
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/**
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*
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*/
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private static final long serialVersionUID = 1L;
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@Override
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public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
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res.setContentType("text/html");
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PrintWriter pw = res.getWriter();
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Customer customer = new Customer();
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// req.getParameter
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String email = req.getParameter("email");
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String password = req.getParameter("pwd");
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customer.setEmail(email);
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customer.setPwd(password);
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pw.println("Hello " + email + ", wait while we are checking your credentials..<br>");
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boolean isLoginSuccess = false;
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// isLoginSuccess = email.equals("shashi@gmail.com") &&
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// password.equals("shashi");
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Connection connection = DBUtil.getConnection();
44+
if (connection == null) {
45+
pw.println("<br>Server is down, try after some time!!");
46+
return;
47+
}
48+
49+
String sqlQueryToCheckIfCustomerExistsWithReceivedEmailAndPassword = "select * from customer where email = ? and password = ?";
50+
try {
51+
PreparedStatement ps = connection
52+
.prepareStatement(sqlQueryToCheckIfCustomerExistsWithReceivedEmailAndPassword);
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ps.setString(1, customer.getEmail());
55+
ps.setString(2, customer.getPwd());
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ResultSet rs = ps.executeQuery();
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if (rs.next()) {
60+
isLoginSuccess = true;
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String id = rs.getString("id");
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String name = rs.getString("name");
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String dob = rs.getString("dob");
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email = rs.getString("email");
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String mob = rs.getString("mob");
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String gender = rs.getString("gender");
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customer.setId(id);
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customer.setEmail(email);
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pw.println("<ul>" + "<li>Name: " + name + "</li>" + "<li>Id: " + id + "</li>" + "<li>Email: " + email
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+ "</li>" + "<li>DOB: " + dob + "</li>" + "<li>Mob: " + mob + "</li>" + "<li>Gender: " + gender
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+ "</li>" + "</ul>");
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} else {
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isLoginSuccess = false;
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}
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} catch (SQLException e) {
79+
isLoginSuccess = false;
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e.printStackTrace();
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}
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if (isLoginSuccess) {
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// login success
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pw.println("<h1>User Login Success</h1>");
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//
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} else {
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// login failure
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pw.println("<h2>Invalid Credentials, Try Again!!");
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// include the error in same page and show the login form again
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}
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}
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}

‎Advanced-Java-J2EE-Notes/Servlet_Notes/src/main/java/com/daytwo/bean/Customer.java

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package com.daytwo.bean;
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import java.io.Serializable;
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//page 151
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public class Customer implements Serializable{
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/**
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*
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*/
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private static final long serialVersionUID = 1L;
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public Customer() {}
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private String id;
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private String name;
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private String email;
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private long mob;
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private char gender;
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private String dob;
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private String pwd;
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public String getId() {
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return id;
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}
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public void setId(String id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public String getEmail() {
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return email;
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}
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public void setEmail(String email) {
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this.email = email;
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}
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public long getMob() {
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return mob;
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}
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public void setMob(long mob) {
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this.mob = mob;
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}
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public char getGender() {
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return gender;
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}
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public void setGender(char gender) {
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this.gender = gender;
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}
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public String getDob() {
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return dob;
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}
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public void setDob(String dob) {
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this.dob = dob;
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}
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public String getPwd() {
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return pwd;
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}
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public void setPwd(String pwd) {
63+
this.pwd = pwd;
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}
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@Override
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public String toString() {
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return "Customer [id=" + id + ", name=" + name + ", email=" + email + ", mob=" + mob + ", gender=" + gender
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+ ", dob=" + dob + ", pwd=" + pwd + "]";
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}
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}

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