package?cn.com.dao;

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

public?class?baseDao?{
	//增加driver驅動
	protected?static?final?String?DRIVER=“com.mysql.jdbc.Driver“;
	//設置數據庫的連接地址URL
	protected?static?final?String?URL=“jdbc:mysql://localhost:3306/db_rentcar“;
	//數據庫的用戶名
	protected?static?final?String?USERNAME=“root“;
	//數據庫的密碼
	protected?static?final?String?PASSWORD?=?“root“;
	
	
	//創建數據庫的連接對象
	protected??static?Connection?conn;
	//創建預編譯SQL語句對象
	protected?PreparedStatement?pstm;
	//創建結果集對象
	protected?ResultSet?rs;
	
	
	//連接數據庫
	public?static?Connection??getConnection（）?throws?Exception{
		//加載驅動
		Class.forName（DRIVER）;
		conn?=?DriverManager.getConnection（URL?USERNAME?PASSWORD）;
		return?conn;
		
	}
	//釋放資源
	protected?void?closeAll?（）?throws?Exception{
				if（rs?!=?null）{
					rs.close（）;
				}
				if（pstm?!=?null）{
					pstm.close（）;
				}
				if（conn.isClosed（）==false?&&?conn?!=null）{
					conn.close（）;
				}
		}
		
	
	
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-06-11?08:35??網上汽車租賃項目\
?????文件???????11639??2019-01-02?22:37??網上汽車租賃項目\db_rentcar.sql
?????目錄???????????0??2019-06-11?08:35??網上汽車租賃項目\HT_rentcar\
?????文件?????????967??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\.classpath
?????文件????????1043??2018-12-18?14:19??網上汽車租賃項目\HT_rentcar\.project
?????目錄???????????0??2019-06-11?08:35??網上汽車租賃項目\HT_rentcar\.settings\
?????文件?????????503??2018-12-18?14:19??網上汽車租賃項目\HT_rentcar\.settings\.jsdtscope
?????文件?????????360??2019-01-02?08:54??網上汽車租賃項目\HT_rentcar\.settings\org.eclipse.core.resources.prefs
?????文件?????????670??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\.settings\org.eclipse.jdt.core.prefs
?????文件?????????482??2018-12-18?14:19??網上汽車租賃項目\HT_rentcar\.settings\org.eclipse.wst.common.component
?????文件?????????305??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\.settings\org.eclipse.wst.common.project.facet.core.xml
?????文件??????????49??2018-12-18?14:19??網上汽車租賃項目\HT_rentcar\.settings\org.eclipse.wst.jsdt.ui.superType.container
?????文件???????????6??2018-12-18?14:19??網上汽車租賃項目\HT_rentcar\.settings\org.eclipse.wst.jsdt.ui.superType.name
?????目錄???????????0??2019-06-11?08:35??網上汽車租賃項目\HT_rentcar\build\
?????目錄???????????0??2019-06-11?08:35??網上汽車租賃項目\HT_rentcar\build\classes\
?????目錄???????????0??2019-06-11?08:35??網上汽車租賃項目\HT_rentcar\build\classes\cn\
?????目錄???????????0??2019-06-11?08:35??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\
?????目錄???????????0??2019-06-11?08:35??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\
?????文件????????1325??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\baseDao.class
?????文件?????????104??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\CarDao.class
?????文件?????????249??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\EvaDao.class
?????目錄???????????0??2019-06-11?08:35??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\impl\
?????文件????????2768??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\impl\EvaDaoImpl.class
?????文件????????2355??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\impl\InforDaoImpl.class
?????文件????????4700??2019-01-02?17:16??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\impl\OrdersDaoImpl.class
?????文件????????1955??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\impl\ProtectionDaoImpl.class
?????文件????????3259??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\impl\ScarDaoImpl.class
?????文件????????4516??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\impl\UserDaoImpl.class
?????文件?????????278??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\InformationDao.class
?????文件?????????424??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\OrdersDao.class
?????文件?????????172??2019-01-02?16:37??網上汽車租賃項目\HT_rentcar\build\classes\cn\com\dao\ProtectionDao.class
............此處省略332個文件信息