在java的应用中，我们经常会对数据库进行必要的操作，下来我们就了解一下如何用java连接MysqL数据库 以及java连接sql server数据库

一、MysqL

<div class="jb51code">
<pre class="brush:java;">
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class TestOne {

private static Connection connection;
private static Statement statement;
private static ResultSet result;

public static void main(String[] args) {
try {
//加载jdbc驱动程序
Class.forName("com.mysql.jdbc.Driver");
//指明主机名（默认为：127.0.0.1）和端口号（默认为：3306）以及数据库名（必须指定）
String url = "jdbc:mysql://localhost:3306/test1";
//与数据库建立连接
connection = DriverManager.getConnection(url,"root","123456");
//创建一个Statement对象将SQL语句发送到数据库
statement = connection.createStatement();
//将查询结果返回给result
result = statement.executeQuery("select *from user");
while(result.next()){
System.out.println("name:" + result.getString(1) + " password:" + result.getString(2));
}
connection.close();
result.close();
statement.close();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
try {
if(connection != null)
connection.close();
if(result != null)
result.close();
if(statement != null)
statement.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
/**

• mysql> select from user;
  +----------+----------+
  | name | password |
  +----------+----------+
  | lisi | 123456 |
  | wangwu | 123456 |
  | zhangsan | 123456 |
  +----------+----------+
  *3 rows in set (0.54 sec)

• 在java中的输出结果
  name:lisi password:123456
  name:wangwu password:123456
  name:zhangsan password:123456
  */