Java jdbc Connection sql server And Oracle

这个主要针对的初学者，大神请跳过！

本篇主要是讲述了一个简单的jdbc连接sql service和oracle数据的一个底层方法

文章写的比较简易，有不懂的地方可以留言，后续可能会上传简单范列大家一起学习。

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 {
	// 定义Sql Service的数据库驱动程序
	public final static String DRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";
	// 定义Sql Service数据库的连接地址
	public final static String URL="jdbc:sqlserver://localhost:1433;DatabaseName=bbs";
	// 数据库的连接用户名
	public final static String DBNAME="sa";
	// 数据库的连接密码
	public final static String DBPASS="lql123";
	
	// 定义Oracle的数据库驱动程序
	public final static String DRIVER1="oracle.jdbc.driver.OracleDriver";
	// 定义Oracle数据库的连接地址
	public final static String URL1="jdbc:oracle:thin:@localhost:1521:orcl";
	// 数据库的连接用户名
	public final static String DBNAME1="scott";
	// 数据库的连接密码
	public final static String DBPASS1="lql123";
	
	public Connection getConn()throws ClassNotFoundException,SQLException{
		Class.forName(DRIVER);
		Connection conn = DriverManager.getConnection(URL,DBNAME,DBPASS);
		return conn;
	}
	//关闭连接，释放资源
	public void closeAll(Connection conn,PreparedStatement stat,ResultSet rs){
		if(rs != null){
			try{rs.close();}catch(Exception e){e.printStackTrace();}
		}
		if(stat != null){
			try{stat.close();}catch(Exception e){e.printStackTrace();}
		}
		if(conn != null){
			try{conn.close();}catch(Exception e){e.printStackTrace();}
		}
	}
	
	public int executeSQL(String preSql,String[] parm){
		Connection conn = null;
		PreparedStatement pstmt = null;
		int num = 0;
		try{
			conn = getConn();
			pstmt = conn.prepareStatement(preSql);
			if(parm != null){
				for(int i=0;i<parm.length;i++){
					pstmt.setString(i+1, parm[i]);
				}
			}
			num = pstmt.executeUpdate();
		}catch(Exception e){
			e.printStackTrace();
		}finally{
			closeAll(conn,pstmt,null);
		}
		return num;
	}
	
	public int executeSQL(String preSql){
		Connection conn = null;
		Statement pstmt = null;
		int num = 0;
		try {
			conn = getConn();
			pstmt = conn.createStatement();
			num = pstmt.executeUpdate(preSql);
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			//closeAll(conn,pstmt,null);
		}
		return num;
	}
	//带参数的查询语句
	public ResultSet executeRSQL(String preSql,String[] param){
		Connection conn = null;
		PreparedStatement pstmt = null;
		ResultSet rs = null;
		try {
			conn = getConn();
			pstmt = conn.prepareStatement(preSql);
			if(pstmt != null){
				for(int i = 0;i < param.length; i++){
					pstmt.setString(i + 1, param[i]);
				}
			}
			rs = pstmt.executeQuery();
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			//closeAll(conn, pstmt, rs);
		}
		return rs;
	}
	//不带参数的查询
	public ResultSet executeRSQL(String preSql){
		Connection conn = null;
		Statement pstmt = null;
		ResultSet rs = null;
		try {
			conn = getConn();
			pstmt = conn.createStatement();		// 实例化Statement对象
			rs = pstmt.executeQuery(preSql);	// 执行数据库更新操作
		} catch (Exception e) {
			e.printStackTrace();
		}
		return rs;
	}
	//测试
	public static void main(String agrs[]){
		BaseDao baseDao = new BaseDao();
		ResultSet rs = null;
		int num = 0;
		//无参数修改修改
		/*String sql = "update tbl_board set boardName='灌水乐园' where boardId=15";
		num = baseDao.executeSQL(sql);
		System.out.println(num);//1表示修改成功,0表示修改失败*/
		
		//有参数修改修改
		/*String parm[] = {"15"}; 
		String sql = "update tbl_board set boardName='灌水乐园' where boardId = ?";
		num = baseDao.executeSQL(sql, parm);
		System.out.println(num);*/
		
		//无参数调用查询语句
		/*String sql = "select * from tbl_board";
		rs = baseDao.executeRSQL(sql);*/
		
		//有参数调用查询语句
		/*String[] parm = {"0"};
		String sql = "select * from tbl_board where parentId=?";
		rs=baseDao.executeRSQL(sql,parm);*/
		/*try {
			while(rs.next()){
				System.out.println(rs.getInt(1)+" "+rs.getString(2));
			}
			rs.close();
		} catch (SQLException e) {
			e.printStackTrace();
		}*/
	}
}

数据库

create table tbl_board(
 boardId int,
 boardName varchar,
 parentId int,
)

以下为架包下载地址

Java
jdbc连接sql server数据库架包

Java
jdbc连接oracle数据库架包