我把帮助从this博客文章:com.mysql.jdbc.driver类未发现异常
,但我得到没有找到com.mysql.jdbc.driver类异常。那篇博客文章的不同之处在于他们试图在我的情况下连接到mysql而不是MS SQL。这是我的代码到目前为止: package com.example.dbtry;
public class MainActivity extends Activity {
protected TextView tv;
private static final String url = "jdbc:jtds:sqlserver://Server.com:1433/DB_name";
private static final String user = "username";
private static final String pass = "password";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
testDB();
}
public void testDB() {
tv = (TextView)findViewById(R.id.textView1);
try {
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection(url, user, pass);
/* System.out.println("Database connection success"); */
String result = "Database connection success\n";
tv.setText(result);
Statement st = con.createStatement();
ResultSet rs = st.executeQuery("select * from this_table");
ResultSetMetaData rsmd = rs.getMetaData();
while(rs.next()) {
result += rsmd.getColumnName(1) + ": " + rs.getInt(1) + "\n";
result += rsmd.getColumnName(2) + ": " + rs.getString(2) + "\n";
result += rsmd.getColumnName(3) + ": " + rs.getString(3) + "\n";
}
tv.setText(result);
}
catch(Exception e) {
e.printStackTrace();
tv.setText(e.toString());
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
请告诉我我做错了什么。我还在清单中为互联网添加了许可。
搜寻有关SO ClassNotFoundException的JDBC驱动程序,你会发现这样很多答案。 Driver类不在您的类路径中。检查你的罐子。 – 2013-03-07 14:28:14