db.java

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package com.csthit.store.db;

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

public class DB {
	
	public static Connection getConn() throws Exception {
		
		//1 装驱动
		Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
		
		Connection conn = DriverManager.getConnection("jdbc:microsoft:sqlserver://localhost:1433;databasename=books", "sa", "");
		
		return conn;
		
	}
	
	public static Statement getStmt(Connection conn) throws Exception {
		
		Statement stmt = conn.createStatement();
		
		return stmt;
	}
	
	public static PreparedStatement getPstmt(Connection conn,String sql) throws Exception {
		PreparedStatement pstmt = conn.prepareStatement(sql);
		return pstmt;
	}
	
	
	public static ResultSet getRS(Statement stmt,String sql) throws Exception {
		ResultSet rs = stmt.executeQuery(sql);
		return rs;
		
	}
	
	public static void close(Connection conn) throws Exception {
		conn.close();
	}
	
	public static void close(Statement stmt) throws Exception {
		stmt.close();
	}
	
	public static void close(ResultSet rs) throws Exception {
		rs.close();
	}
	
	

}