GenFlightRec/air_ticket_book/javabean/db_conn.java

package javabean;
/********************
*@IDE	eclipse
*@jdk	1.8.0_161
*********************/
import java.sql.*;

public class db_conn {
	public Connection conn = null;
	public ResultSet res = null;
	public Statement st = null;
	
	//<2F><><EFBFBD>ݿ<EFBFBD><DDBF><EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	public  db_conn() {
		
        String URL="jdbc:mysql://localhost:3307/fly_ticket?useSSL=false&useUnicode=true&characterEncoding=UTF8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC";     //<2F><><EFBFBD>ݿ<EFBFBD><DDBF><EFBFBD>3306
		String USER="root";    //<2F><><EFBFBD>ݿ<EFBFBD><DDBF>û<EFBFBD><C3BB><EFBFBD>
		String PWD="123456";    //<2F><><EFBFBD>ݿ<EFBFBD><DDBF><EFBFBD><EFBFBD><EFBFBD>
	try{
		Class.forName("com.mysql.cj.jdbc.Driver");
	}catch(ClassNotFoundException e){
		System.out.println("<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD><CAA7>");
		System.out.println(e);
	}
	try{
			
			conn = DriverManager.getConnection(URL,USER,PWD);
//			System.out.println("success");
			st=conn.createStatement();
		}catch(SQLException e){
			System.out.println("<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD>ʧ<EFBFBD><CAA7>");
			System.out.println(e);
		}
	}
	
	//<2F><><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><DDBF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	public int executeInsert(String sql){
		int num=0;
		try{
			num=st.executeUpdate(sql);
		}
		catch(SQLException e){
			System.out.println("<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݳ<EFBFBD><DDB3><EFBFBD><EFBFBD><EFBFBD>Ϣ:"+e.getMessage());
		}
		return num;
	}
	
	//<2F><><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><DDBF>в<EFBFBD>ѯ<EFBFBD><D1AF><EFBFBD><EFBFBD>
	public ResultSet executeQuery(String sql){
		res=null;
		try{
			res=st.executeQuery(sql);
		}
		catch(SQLException e){
			System.out.print("<22><>ѯ<EFBFBD><D1AF><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ:"+e.getMessage());
		}
		return res;
	}
	
	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	public int Update(String sql){
		int num=0;
		try{
			num=st.executeUpdate(sql);
		}catch(SQLException ex){
			System.out.print("ִ<><D6B4><EFBFBD>޸<EFBFBD><DEB8>д<EFBFBD><D0B4><EFBFBD><EFBFBD><EFBFBD>"+ex.getMessage());
		}
		return num;
	}
	
	//ɾ<><C9BE><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	public int executeDelete(String sql){
		int num=0;
		try{
			num=st.executeUpdate(sql);
		}
		catch(SQLException e){
			System.out.print("ִ<><D6B4>ɾ<EFBFBD><C9BE><EFBFBD>д<EFBFBD><D0B4><EFBFBD>:"+e.getMessage());
		}
		return num;
	}
	
	//<2F>ر<EFBFBD><D8B1><EFBFBD><EFBFBD>ݿ<EFBFBD><DDBF><EFBFBD><EFBFBD><EFBFBD>
	public void closeDB(){
		try{
			st.close();
			conn.close();
		}
		catch(Exception e){
			System.out.print("ִ<>йر<D0B9>Connection<6F><6E><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><D0B4><EFBFBD>:"+e.getMessage());
		}
	}
}