石家庄地铁查询系统开发进度
作者：互联网
开发人：张小军 合作同伴：刘世朝
基于石家庄地铁规划图，这两天我们两个想了许多方法来实现该查询系统，首先我们从一条线路来实现，我们选取了一号线来实现。在数据库中建立了一个名为subway的表。表内有三个属性，分别为id、name、line。name为站名，line为线路号。其源代码如下所示：
common.Subway.java:
package common;
public class Subway {
private String id;
private String name;
private String line;
public String getId() {
return id;
}
public void setId(String id) {
this.id=id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name=name;
}
public String getLine() {
return line;
}
public void setLine(String line) {
this.line=line;
}
public Subway() {}
public Subway(String id, String name, String line) {
this.id = id;
this.name = name;
this.line=line;
}
public Subway( String name, String line) {
this.name = name;
this.line=line;
}
}
dao.SubwayDao.java:
//这里是构建的方法。
package dao;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import common.Subway;
import helper.SbHelper;
public class SubwayDao {
/*
* 搜索一号线的所有路线
*/
public List<Subway> subway(String name, String line) {
String sql = "select * from subway order by id ASC";
List<Subway> list = new ArrayList<>();
Connection conn = SbHelper.getConn();
Statement state = null;
ResultSet rs = null;
try {
state = conn.createStatement();
rs = state.executeQuery(sql);
Subway bean = null;
while (rs.next()) {
String id = rs.getString("id");
String name1 = rs.getString("name");
String line1 = rs.getString("line");
bean = new Subway(id, name1,line1);
list.add(bean);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
SbHelper.close(rs, state, conn);
}
return list;
}
/*
* 根据站台名获取该站台的id
*/
public String id(String name)
{
String sql="select id from subway where name = '"+name+"'";
Connection conn = SbHelper.getConn();
Statement state = null;
String id=null;
ResultSet rs = null;
try
{
state=conn.createStatement();
rs = state.executeQuery(sql);
while(rs.next())
{
id=rs.getString("id");
}
}catch (SQLException e) {
e.printStackTrace();
} finally {
SbHelper.close(rs, state, conn);
}
return id;
}
/*
* 根据站台名获取该站台属于几号线路
*/
public String line(String name)
{
String sql="select line from subway where name = '"+name+"'";
Connection conn = SbHelper.getConn();
Statement state = null;
String line=null;
ResultSet rs = null;
try
{
state=conn.createStatement();
rs = state.executeQuery(sql);
while(rs.next())
{
line=rs.getString("line");
line+="号线";
}
}catch (SQLException e) {
e.printStackTrace();
} finally {
SbHelper.close(rs, state, conn);
}
return line;
}
/*
* 根据获取的id值搜索出其中间的站台升序
*/
public String station1(int id1,int id2)
{
String sql="select name from subway where id between '"+id1+"' and '"+id2+"' order by id ASC" ;
Connection conn = SbHelper.getConn();
Statement state = null;
ResultSet rs = null;
String route = "";
try
{
state=conn.createStatement();
rs = state.executeQuery(sql);
if(rs.next())
route=rs.getString("name");
while(rs.next())
{
String name=rs.getString("name");
route+="->"+name;
}
}catch (SQLException e) {
e.printStackTrace();
} finally {
SbHelper.close(rs, state, conn);
}
return route;
}
/*
* 根据获取的id值搜索出其中间的站台降序
*/
public String station2(int id1,int id2)
{
String sql="select name from subaway where id between '"+id1+"' and '"+id2+"' order by id DESC" ;
Connection conn = SbHelper.getConn();
Statement state = null;
ResultSet rs = null;
String route = "";
try
{
state=conn.createStatement();
rs = state.executeQuery(sql);
if(rs.next())
route=rs.getString("name");
while(rs.next())
{
String name=rs.getString("name");
route+="->"+name;
}
}catch (SQLException e) {
e.printStackTrace();
} finally {
SbHelper.close(rs, state, conn);
}
return route;
}
}
helper.SbHleper.java:
package helper;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class SbHelper {
public static String driverName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
public static String dbURL="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=java";
public static String userName="sa";
public static String userPwd="995893";
public static Connection getConn () {
Connection conn = null;
try {
Class.forName(driverName);;//加载驱动
conn = DriverManager.getConnection(dbURL, dbURL, userPwd);
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
/**
* 关闭连接
* @param state
* @param conn
*/
public static void close (Statement state, Connection conn) {
if (state != null) {
try {
state.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void close (ResultSet rs, Statement state, Connection conn) {
if (rs != null) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (state != null) {
try {
state.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
servlet.SubwayServlet.java
package servlet;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import common.Subway;
import dao.SubwayDao;
public class SubwayServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
SubwayDao dao=new SubwayDao();
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
req.setCharacterEncoding("utf-8");
String method = req.getParameter("method");
if ("one_line".equals(method))
{
one_line(req, resp);
}else if("no_transfer1".equals(method))
{
no_transfer1(req, resp);
}
}
/*
* 搜索一号线的所有路线
*/
private void one_line(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
req.setCharacterEncoding("utf-8");
String line = req.getParameter("line");
String name = req.getParameter("name");
List<Subway> ones = dao.subway(name,line);
req.setAttribute("ones", ones);
req.getRequestDispatcher("one_line_searchlist.jsp").forward(req,resp);
}
/*
* 根据站台名查询出其中间站台
*/
private void no_transfer1(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
req.setCharacterEncoding("utf-8");
String name= req.getParameter("name"); //从网页获取输入的站台
int id1 = Integer.parseInt(dao.id(name)); //获取其站台id 将其转换为int类型
String name2 = req.getParameter("name2");
int id2 = Integer.parseInt(dao.id(name2));
if(id1<id2)
{
String station=dao.station1(id1, id2);
req.setAttribute("stations", station);
String line=dao.line(name);
System.out.print(line);
req.setAttribute("lines", line);
req.getRequestDispatcher("no_transfer_searchlist.jsp").forward(req,resp);//升序车站
req.getRequestDispatcher("no_transfer_searchlist.jsp").forward(req,resp);//升序车站
}else
{
String station=dao.station2(id2, id1);
req.setAttribute("stations", station);
String line=dao.line(name);
System.out.print(line);
req.setAttribute("lines", line);
req.getRequestDispatcher("no_transfer_searchlist.jsp").forward(req,resp);//降序车站
req.getRequestDispatcher("no_transfer_searchlist.jsp").forward(req,resp);//升序车站
}
}
}
下面是jsp文件。
one_line_search.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>一号线</title>
<style>
.a{
margin-top: 20px;
}
.b{
font-size: 20px;
width: 160px;
color: white;
background-color: greenyellow;
}
</style>
</head>
<body>
<div align="center">
<form action="SubwayServlet?method=one_line" method="post" onsubmit="return check()">
<div class="a">
一号线
</div>
<div class="a">
<button type="submit" class="b">查 询</button>
</div>
</form>
</div>
</body>
</html>
one_line_searchlist.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>一号线</title>
<style>
.a{
margin-top: 20px;
}
.b{
font-size: 20px;
width: 160px;
color: white;
background-color: greenyellow;
}
.tb, td {
border: 1px solid black;
font-size: 22px;
}
</style>
</head>
<body>
<div align="center">
<table class="tb">
<tr>
<td>站台</td>
<td>线路</td>
<td>起点站——终点站</td>
<td>站台</td>
</tr>
<!-- forEach遍历出adminBeans -->
<c:forEach items="${ones}" var="item" varStatus="status">
<tr>
<td>${item.id}</td>
<td><a>${item.line}</a></td>
<td>${item.intro}</td>
<td>${item.route}</td>
<td>${item.name}</td>
</tr>
</c:forEach>
</table>
</div>
</body>
</html>
no_transfer_search.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style>
.a{
margin-top: 20px;
}
.b{
font-size: 20px;
width: 160px;
color: white;
background-color: greenyellow;
}
</style>
</head>。
<body>
<div align="center">
<form action="SubwayServlet?method=no_transfer1" method="post" onsubmit="return check()">
<div class="a">
起点站<input type="text" id="name" name="name"/>
</div>
<div class="a">
终点站<input type="text" id="name2" name="name2" />
</div>
<div class="a">
<button type="submit" class="b">查 询</button>
</div>
</form>
</div>
</body>
</html>
no_transfer_searchlist.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style>
.a{
margin-top: 20px;
}
.b{
font-size: 20px;
width: 160px;
color: white;
background-color: greenyellow;
}
.tb, td {
border: 1px solid black;
font-size: 22px;
}
</style>
</head>
<body>
<div align="center">
<table class="tb">
<tr>
<td></td>
<td>线路</td>
<td>车次</td>
<tr></tr>
<tr>
<td>中间站</td>
<td><%=request.getAttribute("stations") %></td>
<td><%=request.getAttribute("lines") %></td>
</tr>
</table>
</div>
</body>
</html>
数据库中的表：
运行结果：
虽然系统没有报错，但在最后运行时如上图所示出了错。找了许久我们目前还是没找出错误。这是我们开发进度。
标签：name,rs,石家庄,id,state,地铁,开发进度,line,String 来源： https://www.cnblogs.com/lover995/p/10651040.html