每周总结之第六周

这周进行的课堂测试是地铁信息系统，我完成了第一阶段，实现了站点查询，线路查询，起点——终点查询可以查看，代码部分如

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 Dao.DBUtil;
import Javabean.bean;

 

public class Dao {

 

public Dao() {
// TODO Auto-generated constructor stub
}
public static bean searchxianlu(String xianlu)
{
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
String teaname=null;
bean be=new bean();
try {
String sql="select zhanming from jiben where xianluhao= '"+xianlu+"'";
state = conn.createStatement();
System.out.print(xianlu+"号线：");
rs = state.executeQuery(sql);

while(rs.next()){
teaname = rs.getString("zhanming");
System.out.print(teaname+' ');
be.setZhanming(rs.getString("zhanming"));
}
System.out.println(be.getZhanming());

 

}
catch(SQLException e) {
e.printStackTrace();
}
finally {
DBUtil.close(state, conn);
}
return be;
}
public static String searchzhandian(String zhanming)
{
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
String teaname=null;
bean bean=new bean();
try {
String sql="select xianluhao from jiben where zhanming= '"+zhanming+"'";
state = conn.createStatement();
System.out.print(zhanming+"：该站途径 ");
rs = state.executeQuery(sql);
while(rs.next()){
teaname = rs.getString("xianluhao");
System.out.print(teaname+"号线 ");
bean.setXianluhao(teaname);
}
}
catch(SQLException e) {
e.printStackTrace();
}
finally {
DBUtil.close(state, conn);
}
return teaname;
}
public List<bean> getallxianluhao(String xianluhao){
Connection conn = DBUtil.getConn();
List<bean> list=new ArrayList<bean>();

try {String sql="select zhanming from jiben where xianluhao= '"+xianluhao+"'";
Statement state = null;
ResultSet rs = null;
ResultSet ps = null;
state = conn.createStatement();

rs = state.executeQuery(sql);
while (rs.next()) {

bean bean=new bean();
bean.setZhanming(rs.getString("zhanming"));

list.add(bean);
}
} catch (SQLException e) {
e.printStackTrace();
}

return list;
}
public List<bean> getallzhanming(String zhanming){
Connection conn = DBUtil.getConn();
List<bean> list=new ArrayList<bean>();

try {String sql="select xianluhao from jiben where zhanming= '"+zhanming+"'";
Statement state = null;
ResultSet rs = null;
ResultSet ps = null;
state = conn.createStatement();

rs = state.executeQuery(sql);
while (rs.next()) {

bean bean=new bean();
bean.setXianluhao(rs.getString("xianluhao"));

list.add(bean);
}
} catch (SQLException e) {
e.printStackTrace();
}

return list;
}
public static int searchqidian( String qidian)
{
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
int teaname=-1;

try {
String sql="select chezhanid from jiben where zhanming= '"+qidian+"'";
state = conn.createStatement();

rs = state.executeQuery(sql);
while(rs.next()){
teaname = rs.getInt("chezhanid");
System.out.print(teaname);

}
}
catch(SQLException e) {
e.printStackTrace();
}
finally {
DBUtil.close(state, conn);
}
return teaname;
}
public static int searchzhongdian(String zhongdian)
{
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
int teaname=-1;

try {
String sql="select chezhanid from jiben where zhanming= '"+zhongdian+"'";
state = conn.createStatement();

rs = state.executeQuery(sql);
while(rs.next()){
teaname = rs.getInt("chezhanid");
System.out.print(teaname);

}
}
catch(SQLException e) {
e.printStackTrace();
}
finally {
DBUtil.close(state, conn);
}
return teaname;
}
public List<bean> getallqishi(int qi,int zhong,String xianluhao){
Connection conn = DBUtil.getConn();
List<bean> list=new ArrayList<bean>();

try {String sql="select zhanming from jiben where chezhanid<='"+zhong+"'and chezhanid>='"+qi+"'and xianluhao ='"+xianluhao+"'";
Statement state = null;
ResultSet rs = null;
ResultSet ps = null;
state = conn.createStatement();

rs = state.executeQuery(sql);
while (rs.next()) {

bean bean=new bean();
bean.setZhanming(rs.getString("zhanming"));

list.add(bean);
}
} catch (SQLException e) {
e.printStackTrace();
}

return list;
}

}

 

标签：总结,rs,每周,bean,第六周,state,sql,null,conn
来源： https://www.cnblogs.com/wyq134214/p/16376448.html