CheckBox Values into Database By Servlets o By this Example you will know the following things.  How to Access Checkbox values into Servlet  How to Convert Array Values into Single Object  How to Append String Values to String Builder  Convert StringBuilder Object to String Value Example: HTML Code: Java Servlet Code: import java.io.IOException; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @WebServlet("/send") public class MyServlet extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doProceed(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doProceed(request, response); } protected void doProceed(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 1.getting values from html and assign to array String colors[] = request.getParameterValues("colors"); // 2. creating StringBuilder Object StringBuilder color = new StringBuilder(); // 3. Appending Selected Values to StrinBuilder for (String str : colors) { color.append(str + " "); } Connection conn = null; try { Class.forName("com.mysql.jdbc.Driver"); conn = DriverManager.getConnection("jdbc:mysql://localhost/test", "root", "root"); PreparedStatement pstmt = conn.prepareStatement("insert into colors values (?);"); //4. Converting StringBuilder Object to String pstmt.setString(1, color.toString()); pstmt.executeUpdate(); } catch (Exception e) { e.printStackTrace(); } } } Output: 1 H.N0 15-20/677/8 2 Madahapur 3 Hitech City 4 Hyderabad 5 Telangana