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📄 queryalltopic.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
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package com.middle.graduate.servlet.student.operation;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

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.entity.Teacher;
import com.middle.graduate.biz.entity.Topic;
import com.middle.graduate.biz.exce.DataException;
import com.middle.graduate.util.HbnUtil;

public class QueryAllTopic extends HttpServlet {
	private DBStudentDao dao = new DBStudentImpl();
	private static final long serialVersionUID = -6409839998549230794L;
	
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("gbk");
		response.setContentType("text/html;charset=gb2312");
		HttpSession session = request.getSession();
		Integer studentId = (Integer)session.getAttribute("studentId");
		System.out.println("studentId = " + studentId);
		PrintWriter out = response.getWriter();
		try {
			List<Topic> list = dao.queryAllTopic();
			out.println("<html>");
			out.println("<head>");
			out.println("<title>query all topic</title>");
			out.println("</head>");
			out.println("<body bgcolor = \"greeen\">");
			out.println("<table align = \"center\" border = \"2\">");
			out.println("<form method = \"post\" action = \"/jsp-graduate/student/dbo/selecttopic\"");
			out.println("<tr><td align = \"center\">课题号</td>");
			out.println("<td align = \"center\">课题名称</td>");
			out.println("<td align = \"center\">课题描述</td>");
			out.println("<td align = \"center\">课题属性</td>");
			out.println("<td align = \"center\">课题导师</td>");
			out.println("<td align = \"center\">课题状态</td>");
			out.println("<td align = \"center\">选择课题</td></tr>");
			for (Topic t : list) {
				Teacher teacher = t.getTeacher();
//				Student student = dao.querySelectedTopic(studentId);
//				if(student.getTopic().getTeacher() == null) {
//					System.out.println(student.getTopic().getTeacher() == null);
					if(t.getTopicState() == 0) {
						out.println("<tr>"
								+ "<td align = \"center\">" + t.getTopicId() + "</td>"
								+ "<td align = \"center\">" + t.getTopicName() + "</td>"
								+ "<td align = \"center\">" + t.getTopicContent() + "</td>"
								+ "<td align = \"center\">" + t.getTopicProperty() + "</td>"
								+ "<td align = \"center\">" + teacher.getTeacherName() + "</td>"
								+ "<td align = \"center\">未被选</td>"
								+ "<td align = \"center\"><input type = \"radio\" name = \"topicId\" value = \"" + t.getTopicId() + "\"/></td>"
								+ "</tr>");
					} else {
						out.println("<tr>"
								+ "<td align = \"center\">" + t.getTopicId() + "</td>"
								+ "<td align = \"center\">" + t.getTopicName() + "</td>"
								+ "<td align = \"center\">" + t.getTopicContent() + "</td>"
								+ "<td align = \"center\">" + t.getTopicProperty() + "</td>"
								+ "<td align = \"center\">" + teacher.getTeacherName() + "</td>"
								+ "<td align = \"center\">被选</td>"
								+ "<td align = \"center\">--</td>"
								+ "</tr>");
					}
//				} else {
//					if(t.getTopicState() == 0) {
//						out.println("<tr>"
//								+ "<td align = \"center\">" + t.getTopicId() + "</td>"
//								+ "<td align = \"center\">" + t.getTopicName() + "</td>"
//								+ "<td align = \"center\">" + t.getTopicContent() + "</td>"
//								+ "<td align = \"center\">" + t.getTopicProperty() + "</td>"
//								+ "<td align = \"center\">" + teacher.getTeacherName() + "</td>"
//								+ "<td align = \"center\">未被选</td>"
//								+ "<td align = \"center\">--</td>"
//								+ "</tr>");
//					} else {
//						out.println("<tr>"
//								+ "<td align = \"center\">" + t.getTopicId() + "</td>"
//								+ "<td align = \"center\">" + t.getTopicName() + "</td>"
//								+ "<td align = \"center\">" + t.getTopicContent() + "</td>"
//								+ "<td align = \"center\">" + t.getTopicProperty() + "</td>"
//								+ "<td align = \"center\">" + teacher.getTeacherName() + "</td>"
//								+ "<td align = \"center\">被选</td>"
//								+ "<td align = \"center\">--</td>"
//								+ "</tr>");
//					}
//				}
			}
			out.println("<tr align = \"right\"><td colspan = \"7\"><input type = \"submit\" value = \"submit\" /></td></tr>");
			out.println("</form>");
			out.println("</table>");
			out.println("</body>");
			out.println("</html>");
		} catch (DataException e) {
			e.printStackTrace();
		} finally {
			HbnUtil.closeSession();
			out.close();
		}
	}
}

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