JDBC的一些代码

import java.sql.*;

public class jdbc {
	
	//JDBC 驱动名及数据库名  URL
	static final String JDBC_DRIVE = "com.mysql.jdbc.Driver";
	static final String DB_URL = "jdbc:mysql://localhost:3306/runoob";
	
	static final String USER = "root";
	static final String PASS = "root";
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Connection conn = null;
		Statement stmt = null;
	    try{
	    	//注册JDBC驱动
	    	Class.forName("com.mysql.jdbc.Driver");
	    	
	    	//打开链接
	    	System.out.println("链接数据库...");
	    	conn = DriverManager.getConnection(DB_URL, USER, PASS);
	    	
	    	//执行查询
	    	System.out.println("实例化statement对象...");
	    	stmt = conn.createStatement();
	    	String sql;
	    	sql = "select id, name, url from websites";
	    	ResultSet rs = stmt.executeQuery(sql);
	    	
	    	//展开数据集
	    	while(rs.next()){
	    		int id = rs.getInt("id");
	    		String name = rs.getString("name");
	    		String url = rs.getString("url");
	    		
	    		//output data
	    		System.out.print("id" +  id);
	    		System.out.print(", name" +  name);
	    		System.out.print(", url" +  url);
	    		System.out.print("
");
	    	}
	    	rs.close();
	    	stmt.close();
	    	conn.close();
	    } catch(SQLException se) {
	    	//处理JDBC错误
	    	se.printStackTrace();
	    } catch(Exception e) {
	    	//处理Class.forName 错误
	    	e.printStackTrace();
	    } finally {
	    	//关闭资源
	    	try{
	    		if( stmt != null )
	    			stmt.close();
	    	} catch(SQLException se2) {
	    		//
	    	}
	    	/******************************/
	    	try{
	    		if( conn != null )
	    			conn.close();
	    	} catch(SQLException se3) {
	    		se3.printStackTrace();
	    	}
	    }
		System.out.println("完成");
	}
}

　　JDBC的一些代码，自己在eclipse跑了一下，代码源自菜鸟教程！