如何使用jdbc将android studio连接到mysql
我已经下载了mysql-java-connector-5.1 并将其作为库导入 程序正在编译，但无论我在做什么，都会抛出一个关于连接失败的异常 我想将数据从应用程序（android studio java）发送到存储在amazon（aws）中的sql数据库，我想用raspberry pi（使用c++）获取数据 <> C++工作完美。< /P> 使用android studio，我不能连接，不能连接到本地主机（mysql工作台），也不能连接到aws 我在web上看到“getConnection”函数中的“url”参数的一些模板，我使用了这些模板： 对于本地主机：如何使用jdbc将android studio连接到mysql,android,mysql,jdbc,mysql-workbench,Android,Mysql,Jdbc,Mysql Workbench,我已经下载了mysql-java-connector-5.1 并将其作为库导入 程序正在编译，但无论我在做什么，都会抛出一个关于连接失败的异常 我想将数据从应用程序（android studio java）发送到存储在amazon（aws）中的sql数据库，我想用raspberry pi（使用c++）获取数据 C++工作完美。< /P> 使用android studio，我不能连接，不能连接到本地主机（mysql工作台），也不能连接到aws 我在web上看到“getConnection”函数中
String url = "jdbc:mysql://<local ip>:<port>/<schema>
Class.forName("com.mysql.jdbc.Driver").newInstance();
public void test(View view) {
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
try {
String url = "jdbc:mysql://192.168.1.17:3306/sys";
String user = "root";
String password = "password";
//local verion - find ip with ifconfig/what is my ip website
conn = DriverManager.getConnection(url, user, password);
// Do something with the Connection
} catch (SQLException ex) {
// handle any errors
Log.i("SQLException: " , ex.getMessage());
Log.i("SQLState: " , ex.getSQLState());
}
Class.forName("com.mysql.jdbc.Driver").newInstance();
try {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
connection = DriverManager.getConnection("jdbc:jtds:sqlserver://replacewithip:port//DBNAME", "User", "Password"); // Connect to database
if (connection == null) {
ConnectionResult = "Verify connection";
Toast.makeText(activity, ConnectionResult, Toast.LENGTH_LONG).show();
} else {
//do something with your connection, in this case I executed a query
ResultSet rs = null;
String query = "EXEC AppMovil.INITE_Articulos_Familia '" + codigo + "'";
Statement stmt = connection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
//size = cantidad de rows, metodo para obtener cantidad de rows
rs = stmt.executeQuery(query);
ResultSetMetaData rsmtd = rs.getMetaData();
while(rs.next()){
ListaConsultaFamilia item = new ListaConsultaFamilia(
rs.getString("Codigo"),
rs.getString("Descripcion"),
rs.getString("Precio")
);
listaConsultaFamilias.add(item);
}
listaConsultaFamilias.size();
ConnectionResult = " successful";
isSuccess = true;
connection.close();
}
}catch (Exception ex)
{
//catch error while reading
Looper.prepare();
isSuccess = false;
Toast.makeText(activity, "No existen consultas en el periodo seleccionado", Toast.LENGTH_LONG).show();
ConnectionResult = ex.getMessage();
}