dbutil.java

是我自己在做java训练的时候做的一个小项目

package com.magic.mobile.util;

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 DBUtil {
	static {
		try {
			Class.forName("oracle.jdbc.driver.OracleDriver");
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
	}

	private DBUtil() {

	}

	
	public static Connection getConn() {
		Connection conn = null;
		try {
			conn = DriverManager
					.getConnection("jdbc:oracle:thin:@localhost:1521:CULOYDB","culoy","culoy");
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return conn;
	}

	public static Statement getStmt(Connection conn) {
		Statement stmt = null;
		try {
			stmt = conn.createStatement();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return stmt;
	}
	
	public static PreparedStatement getpStmt(Connection conn,String sql) {
		PreparedStatement pstmt = null;
		try {
			pstmt = conn.prepareStatement(sql);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return pstmt;
	}
	
	public static void closeConn(Connection conn) {
		if(conn!=null){
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
	
	public static void closeStmt(Statement stmt) {
		if(stmt!=null){
			try {
				stmt.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
	
	public static void closeRs(ResultSet rs) {
		if(rs!=null){
			try {
				rs.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
	
	public static ResultSet getRs(Statement stmt,String sql){
		ResultSet rs=null;
		try {
			rs=stmt.executeQuery(sql);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return rs;
	}
	
	public static ResultSet getRs(Connection conn,String sql){
		ResultSet rs=null;
		try {
			rs=conn.createStatement().executeQuery(sql);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return rs;
	}
}