java怎么设定线程池

发布网友发布时间：2022-04-23 18:01

共1个回答

热心网友时间：2022-04-15 09:30

package cn.sdeit.servlet;import java.io.IOException;import java.io.PrintWriter;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.SQLException;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import cn.sdeit.beans.Team;import cn.sdeit.beans.User;import cn.sdeit.mysql.ConnectMySql;/** * Servlet implementation class JoinTeam */@WebServlet(name = "JoinTeam",urlPatterns = {"/JoinTeam"})public class JoinTeam extends HttpServlet{ private static final long serialVersionUID = 1L; private String captainName = null; private String teamName = null; private PrintWriter writer = null; /** * @see HttpServlet#HttpServlet() */ public JoinTeam() { super(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); response.setContentType("text/html"); writer = response.getWriter(); captainName = request.getParameter("name"); teamName = request.getParameter("team"); if(teamName.equals((new Team()).getTeamNameByCaptainName(captainName))) { int result = joinTeam(((User)request.getSession().getAttribute("oldUser")).getEmail()); if(result == 0) { showErrorMessage("抱歉！</br>服务器内部错误，加入队伍失败！请及时反馈管理员！"); } else { response.sendRedirect("mine.jsp"); } } else { showErrorMessage("抱歉！</br>没有找到符合条件的团队！请联系您的队长解决，若信息无误，且问题一直出现，请联系管理员！"); writer.flush(); writer.close(); } } private void showErrorMessage(String error) { writer.write(error); writer.flush(); writer.close(); } private int joinTeam(String email) { int position = (new Team()).getMinEmptyMemberPosition(teamName); int result = 0; if(position == -1) { showErrorMessage("抱歉！</br>此小组人数已达到上限，请更换队伍或者协商队长调整组员结构！"); } else { Connection connection = ConnectMySql.createConnection(); String sql = "update team set member"+position+" "+"= ? where name = ?"; PreparedStatement prepared = ConnectMySql.createPreparedStatement(connection, sql); try { prepared.setString(1, email); prepared.setString(2, teamName); result = prepared.executeUpdate(); connection.close(); prepared.close(); } catch (SQLException e) { e.printStackTrace(); } } return result; }}