android远程连接MYSQL数据库

package com.zxp.jdbc4mysql; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.util.Log; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); new Thread(new Runnable() { @Override public void run() { try { Class.forName("com.mysql.jdbc.Driver"); java.sql.Connection cn= DriverManager.getConnection("jdbc:mysql://我的ip地址/我要访问的数据库","用户名","密码"); String sql="select B_Name from book"; Statement st=(Statement)cn.createStatement(); ResultSet rs=st.executeQuery(sql); while(rs.next()){ String mybook=rs.getString("B_Name"); Log.i("Mainactivity",mybook); } cn.close(); st.close(); rs.close(); } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } } }).start(); } }