Java 将web SQL Server连接到Android应用程序问题
我在从web到android应用程序连接SQL Server数据库时遇到问题。我的代码和错误粘贴在下面Java 将web SQL Server连接到Android应用程序问题,java,android,sql-server,Java,Android,Sql Server,我在从web到android应用程序连接SQL Server数据库时遇到问题。我的代码和错误粘贴在下面 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_home); StrictMode.ThreadPolicy policy = n
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
try {
System.out.println("ZACZYNA SIE");
Class.forName("net.sourceforge.jtds.jdbc.Driver").newInstance();
connection = DriverManager.getConnection("jdbc:jtds:sqlserver://213.218.122.235:51411;database=testDb;user=admin;password=12334");
} catch (ClassNotFoundException e) {
System.out.println("CLASSNOTFOUND");
e.printStackTrace();
} catch (SQLException e) {
System.out.println("SQLEXCEPTION");
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
}
}
我添加并实现了这个jar
我的错误是:
System.err: java.sql.SQLException: I/O Error: DB server closed connection.
at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2481)
at net.sourceforge.jtds.jdbc.TdsCore.login(TdsCore.java:632)
at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:371)
at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
at java.sql.DriverManager.getConnection(DriverManager.java:179)
at java.sql.DriverManager.getConnection(DriverManager.java:144)
at com.example.tripzip.Home.onCreate(Home.java:52)
at android.app.Activity.performCreate(Activity.java:6609)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1134)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3103)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3260)
at android.app.ActivityThread.access$1000(ActivityThread.java:218)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1734)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6934)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
Caused by: java.io.IOException: DB server closed connection.
at net.sourceforge.jtds.jdbc.SharedSocket.readPacket(SharedSocket.java:852)
at net.sourceforge.jtds.jdbc.SharedSocket.getNetPacket(SharedSocket.java:731)
at net.sourceforge.jtds.jdbc.ResponseStream.getPacket(ResponseStream.java:477)
at net.sourceforge.jtds.jdbc.ResponseStream.read(ResponseStream.java:114)
at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2368)
... 19 more
System.err:java.sql.SQLException:I/O错误:DB服务器关闭连接。
位于net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2481)
位于net.sourceforge.jtds.jdbc.TdsCore.login(TdsCore.java:632)
位于net.sourceforge.jtds.jdbc.JtdsConnection。(JtdsConnection.java:371)
位于net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
位于java.sql.DriverManager.getConnection(DriverManager.java:179)
位于java.sql.DriverManager.getConnection(DriverManager.java:144)
位于com.example.tripzip.Home.onCreate(Home.java:52)
在android.app.Activity.performCreate(Activity.java:6609)上
位于android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1134)
在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3103)上
位于android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3260)
在android.app.ActivityThread.access$1000(ActivityThread.java:218)
在android.app.ActivityThread$H.handleMessage(ActivityThread.java:1734)上
位于android.os.Handler.dispatchMessage(Handler.java:102)
位于android.os.Looper.loop(Looper.java:145)
位于android.app.ActivityThread.main(ActivityThread.java:6934)
位于java.lang.reflect.Method.invoke(本机方法)
位于java.lang.reflect.Method.invoke(Method.java:372)
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run上(ZygoteInit.java:1404)
位于com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
原因:java.io.IOException:数据库服务器已关闭连接。
位于net.sourceforge.jtds.jdbc.SharedSocket.readPacket(SharedSocket.java:852)
位于net.sourceforge.jtds.jdbc.SharedSocket.getNetPacket(SharedSocket.java:731)
位于net.sourceforge.jtds.jdbc.ResponseStream.getPacket(ResponseStream.java:477)
位于net.sourceforge.jtds.jdbc.ResponseStream.read(ResponseStream.java:114)
位于net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2368)
... 还有19个
我希望有人能帮助我