package?rcm.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?DatabaseUtils?{
	public?static?Connection?getConnection（）{
		?
		Connection?conn?=?null;
		try?
		{
			try?{
				Class.forName（“com.mysql.jdbc.Driver“）.newInstance（）;
			}?catch?（InstantiationException?e）?{e.printStackTrace（）;
			}?catch?（IllegalAccessException?e）?{e.printStackTrace（）;}
			conn=?DriverManager.getConnection（“jdbc:mysql://localhost:3306/rcm?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull““root““root“）;//1q2w3e4r5t?
			
		}catch?（ClassNotFoundException?e）?{
			e.printStackTrace（）;
		}catch?（SQLException?e）?{
			e.printStackTrace（）;
		}
		return?conn;
	}
	
	public?static?Statement?createStmt（Connection?conn）?{
		Statement?stmt?=?null;
		try?
		{
			stmt?=?conn.createStatement（）;
		}?
		catch?（SQLException?e）?
		{
			e.printStackTrace（）;
		}
		return?stmt;
	}
	
	public?static?ResultSet?executeQuery（Statement?stmt?String?sql）?{
		ResultSet?rs?=?null;
		try?
		{
			rs?=?stmt.executeQuery（sql）;
		}?
		catch?（SQLException?e）?
		{
			e.printStackTrace（）;
		}
		return?rs;
	}
	
	public?static?ResultSet?executeQuery（PreparedStatement?preparedstmt）
	{
		ResultSet?rs?=?null;
		try?{
			rs?=?preparedstmt.executeQuery（）;
		}?catch?（SQLException?e）?{
			//?TODO?Auto-generated?catch?block
			e.printStackTrace（）;
		}
		
		return?rs;
	}
	
	public?static?PreparedStatement?prepareStmt（Connection?conn?String?sql）?{
		PreparedStatement?pstmt?=?null;
		try?{
			pstmt?=?（PreparedStatement）?conn.prepareStatement（sql）;
		}catch?（SQLException?e）?{
			e.printStackTrace（）;
		}
		return?pstmt;
	}
	public?static?void?close（Connection?conn）?{
		if?（conn?!=?null）?{
			try?{
				conn.close（）;
			}?catch?（SQLException?e）?{
				e.printStackTrace（）;
			}
		}
	}
	
	public?static?void?close（Statement?stmt）?{
		if?（stmt?!=?null）?
		{
			try?
			{
				stmt.close（）;
			}?
			catch?（SQLException?e）?
			{
				e.printStackTrace（）;
			}
		}
	}
	
	public?static?void?close（ResultSet?rs）?
	{
		if?（rs?!=?null）?
		{
			try?{
				rs.close（）;
				}
			catch?（SQLException?e）?
				{
				e.printStackTrace（）;
				}
		}
	}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????1762??2019-02-27?14:57??jsp商城-（簡單適合二次開發(fā)）\rcm\.classpath

?????文件????????282??2016-02-07?11:52??jsp商城-（簡單適合二次開發(fā)）\rcm\.mymetadata

?????文件???????1746??2016-02-07?15:00??jsp商城-（簡單適合二次開發(fā)）\rcm\.project

?????文件????????500??2016-02-07?11:52??jsp商城-（簡單適合二次開發(fā)）\rcm\.settings\.jsdtscope

?????文件?????????74??2016-05-13?18:40??jsp商城-（簡單適合二次開發(fā)）\rcm\.settings\com.genuitec.eclipse.core.prefs

?????文件????????247??2016-05-19?17:32??jsp商城-（簡單適合二次開發(fā)）\rcm\.settings\com.genuitec.eclipse.migration.prefs

?????文件????????364??2016-02-07?11:52??jsp商城-（簡單適合二次開發(fā)）\rcm\.settings\org.eclipse.jdt.core.prefs

?????文件????????535??2016-05-19?17:32??jsp商城-（簡單適合二次開發(fā)）\rcm\.settings\org.eclipse.wst.common.component

?????文件????????359??2016-05-19?17:32??jsp商城-（簡單適合二次開發(fā)）\rcm\.settings\org.eclipse.wst.common.project.facet.core.xml

?????文件?????????49??2016-02-07?11:52??jsp商城-（簡單適合二次開發(fā)）\rcm\.settings\org.eclipse.wst.jsdt.ui.superType.container

?????文件??????????6??2016-02-07?11:52??jsp商城-（簡單適合二次開發(fā)）\rcm\.settings\org.eclipse.wst.jsdt.ui.superType.name

?????文件???????7290??2016-05-26?10:06??jsp商城-（簡單適合二次開發(fā)）\rcm\rcm.sql

?????文件???????2373??2016-05-20?14:14??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\dao\DatabaseUtils.java

?????文件???????5541??2016-02-17?11:05??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\dao\ProductDao.java

?????文件???????1301??2016-02-17?11:44??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\dao\UserDao.java

?????文件????????506??2016-02-07?12:44??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\entity\ClassfiyProduct.java

?????文件????????488??2016-02-07?12:42??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\entity\Classify.java

?????文件????????922??2016-02-08?12:31??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\entity\Frequency.java

?????文件???????1730??2016-02-09?17:33??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\entity\Product.java

?????文件????????456??2016-02-07?12:45??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\entity\User.java

?????文件???????1933??2016-02-17?11:00??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\servlet\FindAllProducts.java

?????文件???????1023??2016-02-17?11:01??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\servlet\IndexServlet.java

?????文件???????1301??2016-02-09?16:49??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\servlet\LoginServlet.java

?????文件???????1020??2016-02-09?20:13??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\servlet\LogoutServlet.java

?????文件???????1473??2016-02-17?10:59??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\servlet\ProductDetailServlet.java

?????文件???????1285??2016-02-17?11:02??jsp商城-（簡單適合二次開發(fā)）\rcm\src\rcm\servlet\RegistServlet.java

?????文件????????991??2014-03-01?10:38??jsp商城-（簡單適合二次開發(fā)）\rcm\WebRoot\css\context.css

?????文件???????4158??2015-02-19?12:20??jsp商城-（簡單適合二次開發(fā)）\rcm\WebRoot\css\order.css

?????文件???????9182??2015-02-14?10:05??jsp商城-（簡單適合二次開發(fā)）\rcm\WebRoot\css\shopping_vehicle.css

?????文件??????15342??2015-02-14?00:10??jsp商城-（簡單適合二次開發(fā)）\rcm\WebRoot\css\T2_common.css

............此處省略118個文件信息