虽然在项目中添加了特定的jar但没有找到类(没有webservice的android到sqlserver)

Question

我直接将android连接到SQLServer(我知道它不推荐)

我写了以下代码:

public class MainActivity extends Activity {


     String dbName = "AndroidDB";
     String serverip="10.0.2.2";
     String serverport="1433";
     //String url = "jdbc:sqlserver://14GRAFICALI\\MSSQLSERVER2008;databaseName="+dbName+"";
     //String url ="jdbc:sqlserver://14GRAFICALI\\MSSQLSERVER2008;databaseName=AndroidDB;integratedSecurity=true";
     String url ="jdbc:sqlserver://14GRAFICALI;instanceName=\\MSSQLSERVER2008;DatabaseName=AndroidDB;integratedSecurity=true";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        TextView tvData=(TextView)findViewById(R.id.tvSelectedData);

        try {
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance();
            Class.forName("javax.sql.XAConnection").newInstance();
            Connection conn =DriverManager.getConnection(url);                   

            Statement statement=conn.createStatement();
            ResultSet resultSet=statement.executeQuery("select * from UserMaster");
            while(resultSet.next()){
                tvData.setText(" Data1 : "+resultSet.getString(1)+"  Data 2 : "+resultSet.getNString(2));
            }

        } catch (Exception e) {
            e.printStackTrace();
            tvData.setText(e.getMessage());
        }



    }

在此之前,我没有这条线:

 Class.forName("javax.sql.XAConnection").newInstance();

但它给了我一个例外:

09-07 15:12:20.911: E/dalvikvm(1293): Could not find class 'javax.sql.XAConnection', referenced from method com.microsoft.sqlserver.jdbc.SQLServerConnection.poolCloseEventNotify

因此我导入了一个包含该文件的jar并将其添加到库中:

(jboss.jar)

出口:

在此之后我也得到错误:

java.lang.ClassNotFoundException: javax.sql.XAConnection

我有这门课:

我不明白为什么会出现这个错误.请帮我.

logcat的:

09-07 15:52:52.641: W/System.err(330): java.lang.ClassNotFoundException: javax.sql.XAConnection
09-07 15:52:52.641: W/System.err(330):  at java.lang.Class.classForName(Native Method)
09-07 15:52:52.641: W/System.err(330):  at java.lang.Class.forName(Class.java:234)
09-07 15:52:52.641: W/System.err(330):  at java.lang.Class.forName(Class.java:181)
09-07 15:52:52.641: W/System.err(330):  at com.example.sqlservercall.MainActivity.onCreate(MainActivity.java:33)
09-07 15:52:52.641: W/System.err(330):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
09-07 15:52:52.651: W/System.err(330):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
09-07 15:52:52.651: W/System.err(330):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
09-07 15:52:52.651: W/System.err(330):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
09-07 15:52:52.651: W/System.err(330):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
09-07 15:52:52.651: W/System.err(330):  at android.os.Handler.dispatchMessage(Handler.java:99)
09-07 15:52:52.651: W/System.err(330):  at android.os.Looper.loop(Looper.java:123)
09-07 15:52:52.651: W/System.err(330):  at android.app.ActivityThread.main(ActivityThread.java:3683)
09-07 15:52:52.651: W/System.err(330):  at java.lang.reflect.Method.invokeNative(Native Method)
09-07 15:52:52.651: W/System.err(330):  at java.lang.reflect.Method.invoke(Method.java:507)
09-07 15:52:52.651: W/System.err(330):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
09-07 15:52:52.651: W/System.err(330):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
09-07 15:52:52.651: W/System.err(330):  at dalvik.system.NativeStart.main(Native Method)
09-07 15:52:52.651: W/System.err(330): Caused by: java.lang.NoClassDefFoundError: javax.sql.XAConnection
09-07 15:52:52.661: W/System.err(330):  ... 17 more
09-07 15:52:52.661: W/System.err(330): Caused by: java.lang.ClassNotFoundException: javax.sql.XAConnection in loader dalvik.system.PathClassLoader[/data/app/com.example.sqlservercall-2.apk]
09-07 15:52:52.661: W/System.err(330):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
09-07 15:52:52.661: W/System.err(330):  at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
09-07 15:52:52.671: W/System.err(330):  at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
09-07 15:52:52.671: W/System.err(330):  ... 17 more
09-07 15:52:52.861: I/ActivityManager(61): Displayed com.example.sqlservercall/.MainActivity: +1s503ms
09-07 15:53:00.081: W/ActivityManager(61): finishReceiver called but no pending broadcasts

Answer 1

我已成功完成了与JTDC Android到SQLServer的连接.

谁想要与Android直接连接到SQLServer应该首先记住"这根本不是安全的方式".

我遵循的步骤:

1. 请记住,JDBC会产生SSL问题,JTDC驱动程序是开源且安全的.所以使用JTDC驱动程序.

2. 使用JTDC驱动程序时,请确保使用正确的版本.即JTDC驱动程序版本应与java版本匹配或匹配.我用过jtds-1.2.5-dist 你可以从网上的任何地方得到它.

3. 将Jar文件粘贴到libs文件夹.

4. 转到Java构建路径(右键单击项目>属性)在库中>添加Externl jar.导入Jar文件.

5. 在订单和出口>检查jtds jar如下:

(你在pic中观看的其他罐子没用)

6您必须设置SQLServer登录身份验证(SQLServer的Windows身份验证)屏幕截图如下:

7按如下方式配置SQLServer:

启用TCP/IP和VIA连接.

在TCP/IP属性中将端口更改为1433

8然后,您必须将连接URL设置为:

URL = "JDBC:JTDS:SQLSERVER://10.0.2.2:1433;实例名= 14GRAFICALI\MSSQLSERVER2008;数据库名=" +数据库名+ "; integratedSecurity = TRUE;用户=" +用户名+ ";密码=" +密码;

9从这里你可以简单地按照我给你的代码:

public class gaConnection 
{
String url ="";
Connection conn=null;
Statement statement=null;
ResultSet resultSet=null;
    public void setConnection(String DBName,String UserName,String Password)
    {
        try {
            Class.forName("net.sourceforge.jtds.jdbc.Driver").newInstance();
            url ="jdbc:jtds:sqlserver://10.0.2.2:1433;instanceName=14GRAFICALI\\MSSQLSERVER2008;DatabaseName="+DBName+";integratedSecurity=true;user="+UserName+";password="+Password;
            conn =DriverManager.getConnection(url);
            } catch (Exception e) {
            e.printStackTrace();
            }
    }
    public String showResult()
    {
        String strResult="";
        try
        {
            statement=conn.createStatement();
            resultSet=statement.executeQuery("select * from UserMaster");
            while(resultSet.next()){
               strResult = strResult + " Name : "+resultSet.getString(1)+"  SirName : "+resultSet.getString(2) + "\n";
            }
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        return strResult;
    }

}

10我已经创建了Class For Connection并将其实例化如下:

 public class MainActivity extends Activity {

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

            TextView tvData=(TextView)findViewById(R.id.tvSelectedData);

            String DBName="AndroidDB";
            String UserName="sa";
            String Password="ok";

            try {gaConnection con=new gaConnection();
                con.setConnection(DBName,UserName,Password);
                tvData.setText(con.showResult());
            } catch (Exception e) {
                e.printStackTrace();
                tvData.setText(e.getMessage());
            }

        }

        @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;
        }

    }