Web项目专项训练——火车车次信息管理系统代码分享

题目：火车车次信息管理
一、语言和环境
	A、实现语言
	Java
	B、环境要求
	JDK1.7、Eclipse、Tomcat7.*、mysql
二、功能要求
	使用JSP+Servlet实现火车车次信息管理功能，mysql作为后台数据库，功能包括车次信息浏览、火车车次信息详情和车次信息删除两大功能。具体要求如下： （1）打开火车车次信息管理首页，以列表方式显示所有车次信息，页面列表要求实现隔行变色效果，如图-1所示。   图-1 (2)单击“删除”链接可以进行火车车次信息删除，如果没有复选框被选中，当单击“删除”链接时需要提示“请选择车次！”信息，如图-2所示。   图-2 （3）如果选中复选框，单击“删除”链接，执行删除车次信息操作，并根据删除结果给出相应的信息提示，如图-3所示。   图-3 点击确定后，跳转至车次信息列表页面，并显示更新后的车次列表信息，如图-4所示。 图-4   （4）单击车次超链接，则跳转至指定车次的火车车次详情页面，如图-5所示。   图-5
三、	数据库设计
	数据库表名称及要求：
表名 train_info 中文表名称 火车车次信息表 主键 train_no 序号 字段名称 字段说明 类型 长度 属性 备注 1 train_no 车次编号 varchar 50 主键   2 start_station 始发站 varchar 50 非空   3 arrival_station 终点站 varchar 50 非空   4 start_time 出发时间 varchar 50 非空   5 arrival_time 到达时间 varchar 50 非空   6 type 车次类型 varchar 50 非空   7 runtime 运行时间 varchar 50 非空   8 mile 里程 double(18, 1)   非空

创建实体类

package com.qf.entity;

public class TrainInfo {
	private String train_no;
	private String start_station;
	private String arrival_station;
	private String start_time;
	private String arrival_time;
	private String type;
	private String runtime;
	private double mile;
	public String getTrain_no() {
		return train_no;
	}
	public void setTrain_no(String train_no) {
		this.train_no = train_no;
	}
	public String getStart_station() {
		return start_station;
	}
	public void setStart_station(String start_station) {
		this.start_station = start_station;
	}
	public String getArrival_station() {
		return arrival_station;
	}
	public void setArrival_station(String arrival_station) {
		this.arrival_station = arrival_station;
	}
	public String getStart_time() {
		return start_time;
	}
	public void setStart_time(String start_time) {
		this.start_time = start_time;
	}
	public String getArrival_time() {
		return arrival_time;
	}
	public void setArrival_time(String arrival_time) {
		this.arrival_time = arrival_time;
	}
	public String getType() {
		return type;
	}
	public void setType(String type) {
		this.type = type;
	}
	public String getRuntime() {
		return runtime;
	}
	public void setRuntime(String runtime) {
		this.runtime = runtime;
	}
	public double getMile() {
		return mile;
	}
	public void setMile(double mile) {
		this.mile = mile;
	}
	
}

创建jdbc类对数据库的表进行操作

package com.qf.tools;


import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class DBUtils {
	
	public static Connection conn=null;
	public static PreparedStatement state=null;
	public static ResultSet rs=null;
	
	public static Connection getConnection() throws ClassNotFoundException, SQLException {
		Class.forName("com.mysql.jdbc.Driver");
		conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/lianxi", "root", "147258");
		return conn;
	}
	
	public static int update(String sql,Object...obs) {
		int result=0;
		try {
			DBUtils.getConnection();
			state=conn.prepareStatement(sql);
			for (int i = 0; i < obs.length; i++) {
				state.setObject(i+1, obs[i]);
			}
			result=state.executeUpdate();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return result;
	}
	
	public static ResultSet query(String sql,Object...obs) {
		try {
			DBUtils.getConnection();
			state=conn.prepareStatement(sql);
			for (int i = 0; i < obs.length; i++) {
				state.setObject(i+1, obs[i]);
			}
			rs=state.executeQuery();
		}catch (Exception e) {
			e.printStackTrace();
		}
		return rs;
	}
	
	public static void closeObject() {
		try {
			if(rs!=null) {
				rs.close();
			}
			if(state!=null) {
				state.close();
			}
			if(conn!=null) {
				conn.close();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
}

创建DAO类对数据库的表进行增删改查操作

package com.qf.dao;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.qf.entity.TrainInfo;
import com.qf.tools.DBUtils;

public class TrainInfoDAO {

	public List queryAllTrainInfo() {
		List trains=new ArrayList();
		try {
			String sql="select train_no,start_station,arrival_station,start_time,arrival_time,type,runtime,mile from train_info order by start_time";
			DBUtils.rs=DBUtils.query(sql);
			while(DBUtils.rs.next()) {
				TrainInfo t=new TrainInfo();
				t.setTrain_no(DBUtils.rs.getString("train_no"));
				t.setStart_station(DBUtils.rs.getString("start_station"));
				t.setArrival_station(DBUtils.rs.getString("arrival_station"));
				t.setStart_time(DBUtils.rs.getString("start_time"));
				t.setArrival_time(DBUtils.rs.getString("arrival_time"));
				t.setType(DBUtils.rs.getString("type"));
				t.setRuntime(DBUtils.rs.getString("runtime"));
				t.setMile(DBUtils.rs.getDouble("mile"));
				trains.add(t);
			}
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			DBUtils.closeObject();
		}
		return trains;
	}

	public void deleteTrainInfo(String[] trains) {
		String sql="delete from train_info where train_no=?";
		for (int i = 0; i < trains.length; i++) {
			DBUtils.update(sql, trains[i]);
		}
		DBUtils.closeObject();
	}

	public TrainInfo queryTrainInfo(String train_no) {
		TrainInfo t=null;
		try {
			String sql="select train_no,start_station,arrival_station,start_time,arrival_time,type,runtime,mile from train_info where train_no=?";
			DBUtils.rs=DBUtils.query(sql,train_no);
			while(DBUtils.rs.next()) {
				t=new TrainInfo();
				t.setTrain_no(DBUtils.rs.getString("train_no"));
				t.setStart_station(DBUtils.rs.getString("start_station"));
				t.setArrival_station(DBUtils.rs.getString("arrival_station"));
				t.setStart_time(DBUtils.rs.getString("start_time"));
				t.setArrival_time(DBUtils.rs.getString("arrival_time"));
				t.setType(DBUtils.rs.getString("type"));
				t.setRuntime(DBUtils.rs.getString("runtime"));
				t.setMile(DBUtils.rs.getDouble("mile"));
			}
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			DBUtils.closeObject();
		}
		return t;
	}

}

在web.xml中配置默认起始页

  NZjavaee1901Train
  
    QueryTrainInfo
  

查询数据库中所有火车信息的servlet代码

package com.qf.servlet;

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

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 com.qf.dao.TrainInfoDAO;
import com.qf.entity.TrainInfo;

/**
 * Servlet implementation class QueryTrainInfo
 */
@WebServlet("/QueryTrainInfo")
public class QueryTrainInfo extends HttpServlet {
	private static final long serialVersionUID = 1L;

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		response.setContentType("text/html;charset:utf-8");
		
		TrainInfoDAO trainInfoDao=new TrainInfoDAO();
		List trains=trainInfoDao.queryAllTrainInfo();
		request.setAttribute("trains", trains);
		request.getRequestDispatcher("homePage.jsp").forward(request, response);
	}

}

前端首页的jsp代码

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>









	

		

			
					

				

					
删除
					
车次
					
发车--到达
					
发时--到时
					
车型
					
运行时间
				
				

						

						
${t.train_no}
						
${t.start_station}--${t.arrival_station}
						
${t.start_time}--${t.arrival_time}
						
${t.type}
						
${t.runtime}
					
				
			
		
	

删除火车信息的servlet代码

package com.qf.servlet;

import java.io.IOException;
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 com.qf.dao.TrainInfoDAO;

/**
 * Servlet implementation class DeleteTrainServlet
 */
@WebServlet("/DeleteTrainServlet")
public class DeleteTrainServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		response.setCharacterEncoding("utf-8");
		
		String trains1=request.getParameter("delete");
		String[] trains=trains1.split(",");
		TrainInfoDAO trainInfoDao=new TrainInfoDAO();
		trainInfoDao.deleteTrainInfo(trains);
		response.sendRedirect("QueryTrainInfo");
	}

}

通过火车车次编号查询火车车次详细信息servlet代码

package com.qf.servlet;

import java.io.IOException;
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 com.qf.dao.TrainInfoDAO;
import com.qf.entity.TrainInfo;

/**
 * Servlet implementation class QueryTrainByNoServlet
 */
@WebServlet("/QueryTrainByNoServlet")
public class QueryTrainByNoServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		response.setContentType("text/html;charset:utf-8");
		String train_no=request.getParameter("number");
		TrainInfoDAO trainInfoDao=new TrainInfoDAO();
		TrainInfo train=trainInfoDao.queryTrainInfo(train_no);
		request.setAttribute("train", train);
		request.getRequestDispatcher("trainInfo.jsp").forward(request, response);
	}

}

单击车次超链接跳转至指定车次的火车车次详情页面前端代码

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>








	

		

			

				
火车车次详情
			
			

				
车次
				
${requestScope.train.train_no}
			
			

				
发车--到达
				
${requestScope.train.start_station}--${requestScope.train.arrival_station}
			
			

				
发时--到时
				
${requestScope.train.start_time}--${requestScope.train.arrival_time}
			
			

				
车型
				
${requestScope.train.type}
			
			

				
运行时间(小时)
				
${requestScope.train.runtime}
			
			

				
里程(公里)
				
${requestScope.train.mile}
			
		
	
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