weixin_52201543
2021-08-27 09:26
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用android studio连接阿里云mysql一直连不上

日志报错:NetworkSecurityConfig: No Network Security Config specified, using platform default

    public static Connection getConnection(String dbName) throws SQLException {
        Connection conn = null;
        try {
            Class.forName("com.mysql.jdbc.Driver"); //加载驱动
            String ip = "jdbc:mysql://rm-bp1t9js01f765a35k2o.mysql.rds.aliyuncs.com?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&useSSL=false";
            conn =(Connection) DriverManager.getConnection(
                    "jdbc:mysql://" + ip + ":3306/" + dbName,
                    "zp_x", "Zpx008102");
            MainActivity.conn_on=1;//用于向主函数传参,判断连接是否成功
        }catch (SQLException | ClassNotFoundException ex) {
            ex.printStackTrace();
            MainActivity.conn_on=2;//用于向主函数传参,判断连接是否成功
        }
        return conn;//返回Connection型变量conn用于后续连接
    }


```java
        final Handler handler1 = new Handler(new Handler.Callback() {
            @Override
            public boolean handleMessage(Message message) {
                switch (conn_on)//根据返回值判断网络连接是否成功
                {
                    case 1:conn.setText("网络连接成功");conn.setBackgroundColor(Color.GREEN);break;
                    case 2:conn.setText("网络连接失败");break;
                }
                return false;
            }
        });
        new Thread(new Runnable() {
            @Override
            public void run() {
                Message msg = new Message();
                try {
                    connect.getConnection("person");//执行连接测试
                } catch (SQLException e) {
                    e.printStackTrace();
                }
                handler1.sendMessage(msg);//跳转到handler1
            }
        }).start();

```

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