JDBC技术作是javaweb数据库连接核心API,在使用时,一般先引入相关数据库驱动jar,创建一个数据库连接类,在类中加载数据库驱动,参数配置。连接对象。
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class DbUtil {
public static final String URL = "jdbc:mysql://localhost:3306/imooc";
public static final String USER = "liulx";
public static final String PASSWORD = "123456";
public static void main(String[] args) throws Exception {
//1.加载驱动程序
Class.forName("com.mysql.jdbc.Driver");
//2. 获得数据库连接
Connection conn = DriverManager.getConnection(URL, USER, PASSWORD);
//3.操作数据库,实现增删改查
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT user_name, age FROM imooc_goddess");
//如果有数据,rs.next()返回true
while(rs.next()){
System.out.println(rs.getString("user_name")+" 年龄:"+rs.getInt("age"));
}
}
}
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