Java通过JDBC连接MySQL读取数据学习笔记

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.sql.ResultSet;

public class MyTest {
    public static void main(String args[]) {
        Connection con = null;
        try {
            // 获得MySQL驱动的实例
            Class.forName("com.mysql.jdbc.Driver").newInstance();
            // 提供地址用户名密码并获得连接对象
            con = DriverManager.getConnection("jdbc:mysql://127.0.0.1/test","root", "123456");
       
            if (!con.isClosed())
                // 连接成功提示
                System.out.println("Successfully connected to MySQL server using TCP/IP...");
            // 有Connection对象创建Statement
            Statement st = con.createStatement();
            // 运行SQL语句读取
            ResultSet rs = st.executeQuery("SELECT * FROM emlog_blog");
            // 循环读取数据
            while (rs.next()) {
                // 打印数据
                System.out.println(rs.getString("gid"));
            }
            // 关闭
            con.close();
        } catch(Exception e) {
            System.err.println("Exception: " + e.getMessage());
        }
    }
}