基于Navicat Premium实现Android studio连接MySQL数据库，方法2_androidstudio的room技术和navcat

1.使用Navicat Premium创建自己的数据库，注意创建连接时，记住如下内容：记得记住密码

 2.创建数据库连接类，代码如下

import android.util.Log;
import com.mysql.jdbc.ResultSet;
import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
 
public class DBUtils {
    private final static String driver="com.mysql.jdbc.Driver";
    private final static String url="jdbc:mysql://10.0.2.2:3306/ArtShare?characterEncoding=UTF-8";
    private final static String username="root";
    private final static String password="123456";
    private static final String TAG ="Dbutils";
 
    public static Connection getConn(){
        Connection connection = null;
        try{
            Class.forName(driver);
            //String url = "jdbc:mysql://10.0.2.2:3306/A?characterEncoding=UTF-8";
            connection= DriverManager.getConnection(url, username, password);
            Log.e("数据库连接", "成功!");
        } catch (Exception e) {
            Log.e("数据库连接", "失败!");
            e.printStackTrace();
        }
        return connection;
    }
 
    // 关闭数据库连接，释放资源
    public static void release(Statement stmt, Connection conn) {
        if (stmt != null) {
            try {
                stmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
            stmt = null;
        }
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
            conn = null;
        }
    }
    public static void release(ResultSet rs, Statement stmt,
                               Connection conn){
        if (rs != null) {
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
            rs = null;
        }
        release(stmt, conn);
    }
 
}

对应Android的activity或者fragment中对应方法中，使用线程连接数据库，代码如下：

        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    // 获得数据的连接
                    conn = (Connection) DBUtils.getConn();
                    // 获得Statement对象
                    stmt = (Statement) conn.createStatement();
 
 
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    DBUtils.release(rs, stmt, conn);
                }
            }
        }).start();

 如有需要，也可看看本人的方法1方法1