最简单的java连接数据库步骤

在JAVA中连接数据库通常会出现以下几个步骤：

1.驱动加载，

2.建立连接

3.创建语句

4.执行语句

5.处理ResultSet

具体代码如下：

package jdbcTest;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

public class SampleJDBC {

/**

* @param args

* @throws ClassNotFoundException

* @throws SQLException

*/

public static void main(String[] args) throws ClassNotFoundException, SQLException {

//1.安装驱动

Class.forName("com.mysql.jdbc.Driver");

//Access

//Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

//Oracle

//Class.forName("oracle.jdbc.dirver.OracleDriver");

System.out.println("Driver loaded!!!");

//2.建立连接

Connection con = DriverManager.getConnection("jdbc:mysql://localhost/javabook","root","root");

//Access

//Connection con = DriverManager.getConnection("jdbc:odbc:(数据源)ExampleDBDataSource");

//Oracle

//Connection con = DriverManager.getConnection("jdbc:oracle:thin:@主机名（localhost）:1521","root","root");

System.out.println("database connected.");

//3.创建语句

Statement stmt = con.createStatement();

//4.执行语句

ResultSet rs = stmt.executeQuery("show tables;");

//5.处理查询结果

while(rs.next())

{

System.out.println(rs.getString(1));

}

con.close();

}

}