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📄 mainservlet.java

📁 我们采用了JSP技术为主要手段,本系统采用了多级角色管理：包括系统管理员、系主任
💻 JAVA
字号:
🔍 
package com.middle.graduate.servlet.student;

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;
import javax.servlet.http.HttpSession;

import com.middle.graduate.biz.dao.DBStudentDao;
import com.middle.graduate.biz.dao.impl.DBStudentImpl;
import com.middle.graduate.biz.exce.DataException;

public class MainServlet extends HttpServlet {
	private DBStudentDao dao = new DBStudentImpl();
	private static final long serialVersionUID = 3595479503113312758L;
	
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("gbk");
		response.setContentType("text/html;charset=gb2312");
		PrintWriter out = response.getWriter();
		int studentId = Integer.parseInt(request.getParameter("studentId"));
		String password = request.getParameter("password");
		try {
			boolean bool = dao.login(studentId, password);
			if(bool == true) {
				HttpSession session = request.getSession(true);
				session.setAttribute("studentId", new Integer(studentId));
				out.println("<html>");
				out.println("<head>");
				out.println("<title>");
				out.println("学生");
				out.println("</title>");
				out.println("</head>");
				out.println("<body bgcolor = \"green\">");
				out.println("<table height = \"20%\">");
				out.println("<tr><td></td></tr>");
				out.println("</table>");
				out.println("<table align = \"center\" width = \"50%\" height = \"50%\" cellspacing = \"10%\" cellpadding = \"10\">");
				out.println("<form method = \"post\" action = \"/jsp-graduate/student/urlframe\"");
				out.println("<tr><td align = \"center\">查询所有课题:</td><td><input type = \"submit\" name = \"query_all_topic\" value = \"query_all_topic\"/></td></tr>");
				out.println("<tr><td align = \"center\">查询已选课题:</td><td><input type = \"submit\" name = \"query_selected_topic\" value = \"query_selected_topic\"/></td></tr>");
				out.println("<tr><td></td></tr><tr><td></td></tr>");
				out.println("<tr align = \"left\">");
				out.println("<td align = \"center\">修改密码:</td><td><input type = \"submit\" name = \"change_password\" value = \"change_password\"/></td>");
				out.println("</tr>");
				out.println("<tr><td></td></tr><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr>");
				out.println("<tr align = \"right\">");
				out.println("<td colspan = \"3\">退出系统:</td><td align = \"left\"><input type = \"submit\" name = \"quit\" value = \"quit\"/></td>");
				out.println("</tr>");
				out.println("</form>");
				out.println("</table>");
				out.println("</body>");
				out.println("</html>");
			} else {
				out.println("<html>");
				out.println("<head>");
				out.println("<title>");
				out.println("</title>");
				out.println("</head>");
				out.println("<body>");
				out.println("<form method = \"get\" action = \"/jsp-graduate/login/studentlogin.html\">");
				out.println("<center><h3>你的卡号,密码不对应!</h3></center>");
				out.println("<center><h3>从新登陆点击:<input type = \"submit\" value = \"relogin\"></h3></center>");
				out.println("</form>");
				out.println("</body>");
				out.println("</html>");
			}
		} catch (DataException e) {
			e.printStackTrace();
		}
	}
}

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