鏈接oracle，附通用增刪改查方法

package cn.jbit.pet.dao;
import java.sql.*;
public class BaseDao {

	protected Connection conn=null;
	protected PreparedStatement pstmt=null;
	protected ResultSet rs=null;

	public void getConnection() {
		try {
			Class.forName("oracle.jdbc.driver.OracleDriver");
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
        try {
			conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","system","ok");
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	public void closeAll() {
		
			try {
				if(rs!=null){
				rs.close();
				}
				if(pstmt!=null){
					pstmt.close();
				}
				if(conn!=null){
					conn.close();
				}
			} catch (SQLException e) {
				
				e.printStackTrace();
		}
	}
    
    public int executeUpdateSQL(String sql,Object []param){
    	int num=0;
    	try {
    		getConnection();
			pstmt=conn.prepareStatement(sql);
			if(param!=null){
				for (int i = 0; i < param.length; i++) {
					pstmt.setObject(i+1, param[i]);
				}
			}
			num=pstmt.executeUpdate();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		finally{
			closeAll();
		}
		return num;
    }
    public void executeQuerySQL(String sql,Object []param){
    	try {
    		getConnection();
			pstmt=conn.prepareStatement(sql);
			if(param!=null){
				for (int i = 0; i < param.length; i++) {
					pstmt.setObject(i+1, param[i]);
				}
			}
			rs=pstmt.executeQuery();
		} catch (SQLException e) {
			
			e.printStackTrace();
		}
    } 
}