我有一些数据库需要连接到Servlet;（这些数据库是假的，适用于学校项目）
首先我需要抓住学生数据库：
到达StudentSchedule
到达章节：
最终获得学生正在学习的课程名称http://puu.sh/cO7gN/9d303ebe8b.png
我目前创建了一个Servlet来收集这些信息：
@WebServlet(urlPatterns = {"/ScheduleServlet"})
public class ScheduleServlet extends HttpServlet {
/**
* Processes requests for both HTTP <code>GET</code> and <code>POST</code>
* methods.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
try (PrintWriter out = response.getWriter()) {
/* TODO output your page here. You may use following sample code. */
int iD = Integer.parseInt(request.getParameter("iD"));
int cRN = Integer.parseInt(request.getParameter("cRN"));
String courseID = request.getParameter("courseID");
String courseName = request.getParameter("courseName");
System.out.println(iD);
Student s1=new Student();
s1.findDB(iD);
StudentSchedule s2 = new StudentSchedule();
s2.findDB(cRN);
Section s3 = new Section();
s3.findDB(cRN);
Course s4 = new Course();
s4.findDB(courseID);
s4.findDB(courseName);
String cn=s4.getCourseName();
System.out.println(cn);
RequestDispatcher rd;
HttpSession ses1=request.getSession();
ses1.setAttribute("s4", s4);
rd = request.getRequestDispatcher("/ScheduleView.jsp");
rd.forward(request,response);
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP <code>GET</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP <code>POST</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
*
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
我还有一个网页可以提取他们的信息：http://puu.sh/cO7p0/5f64c27869.jpg
但是，一旦我点击查看日程按钮，就没有关于＆＃34;拉里＆＃34;的信息。课程揭晓。
代码是：
<%@page import="Business.Student"%>
<%@page import="Business.StudentSchedule"%>
<%@page import="Business.Section"%>
<%@page import="Business.Course"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Schedule View</title>
</head>
<body>
<%
HttpSession ses1=request.getSession();
Course s4= (Course)ses1.getAttribute("s4");
%>
<h4>Here is your Information</h4>
<table border="1" width="75%" cellspacing="5" cellpadding="2">
<thead>
<tr>
<th colspan="10">Student Info</th>
</tr>
</thead>
<tbody>
<tr>
<%--TABLE LABLES OF ACCOUNT INFORMATION --%>
<td colspan="2"></td>
<td colspan="2">Course Name</td>
</tr>
<tr>
<%--TABLE DISPLAY OF ACCOUNT INFORMATION --%>
<td colspan="2">Classes: </td>
<td colspan="2"><%= s4.getCourseName()%></td>
</tr>
</tbody>
</table>
<table width="50%" cellspacing="5" cellpadding="2">
</table>
</body>
</html>
注意：我可以连接到数据库，我只需要找到一种方法让servlet工作，让学生在数据库上查看计划，所有Business Objects都在工作，因为我已经测试过了他们把工作放到jsp页面，从收集所有数据库中获取信息，这就是问题，让JSP页面通过所有数据库来获得实际的学生课程。 我可以连接到数据库，我只是想看看如何使用servlet连接所有以获取我需要的信息来找到这些类。