在Android中加載jtds驅動程序時出現NoClassDefFoundError

我很沮喪..... Class.forName("net.sourceforge.jtds.jdbc.Driver").newInstance()不斷給出錯誤。奇怪，但在下面的代碼中，MainActivity對gaConnecion.setConnection的調用工作正常！但是從ResultsActivity失敗並出現上述錯誤：在Android中加載jtds驅動程序時出現NoClassDefFoundError

gaConnection.java：

import java.sql.Connection; 
import java.sql.DriverManager; 
import java.sql.ResultSet; 
import java.sql.Statement; 
import java.text.SimpleDateFormat; 
import java.util.Date; 

import android.content.Context; 
import android.widget.Toast; 

public class gaConnection 
{ 
    String url =""; 
    Connection conn=null; 
    Statement statement=null; 
    ResultSet resultSet=null; 
    public void setConnection(String DBName,String UserName,String Password, Context context) 
{ 
    try { 
     Class.forName("net.sourceforge.jtds.jdbc.Driver").newInstance(); 
     url ="jdbc:jtds:sqlserver://212.150.9.60:1433;instanceName=MSSQLServer;DatabaseName="+DBName+";integratedSecurity=true;user="+UserName+";password="+Password; 
     conn =DriverManager.getConnection(url); 
     } catch (Exception e) { 
      e.printStackTrace();     
      Toast.makeText(context, e.getMessage(), Toast.LENGTH_LONG).show(); 
     } 
} 

public String showResult() 
{ 
    String strResult=""; 
    try 
    { 
     statement=conn.createStatement(); 
     resultSet=statement.executeQuery("select * from vehicles where number='4195666'"); 
     while(resultSet.next()){ 
      strResult = strResult + " Name : "+resultSet.getString(1)+" SirName : "+resultSet.getString(2) + "\n"; 
     } 
    } 
    catch (Exception e) { 
     e.printStackTrace(); 
    } 
    return strResult; 
} 

public void storeInfo(String text) { 
    String dateStamp = new SimpleDateFormat("ddMMyy").format(new Date()); 
    String hourStamp = new SimpleDateFormat("HHmmss").format(new Date()); 
    try 
    { 
     statement=conn.createStatement(); 
     resultSet=statement.executeQuery("insert into vehicles(number, date, time) values('" + text + "', '" + dateStamp + "', '" + hourStamp + "')");   
    } 
    catch (Exception e) { 
     e.printStackTrace(); 
    } 
} 
}

ResultsActivity.java：

import android.app.Activity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.widget.TextView; 

public class ResultsActivity extends Activity { 

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

    getResultsFromSQL(); 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.results, menu); 
    return true; 
} 

public void getResultsFromSQL() { 
    String DBName="hofyam"; 
    String UserName="sa"; 
    String Password="sadmin"; 
    TextView tvData=(TextView)findViewById(R.id.textSQLResults); 

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

}

的logcat：

01-13 10:43:26.444: V/Provider/Setting(31537): invalidate [system]: current 171 != cached 0 
01-13 10:43:26.447: V/Provider/Setting(31537): from db cache, name = sound_effects_enabled value = 0 
01-13 10:43:26.448: I/fengjun1010(31537): -----startActivityForResult,intent=Intent { cmp=com.example.hofyam/.ResultsActivity (has extras) } 
01-13 10:43:26.449: I/fengjun1010(31537): -----agoldPhoneStateListener----- 
01-13 10:43:26.449: I/fengjun1010(31537): ----------mPhoneListenerFlag=true 
01-13 10:43:26.449: I/fengjun1010(31537): ------------agoldChangeGoodleStoreApp--------- 
01-13 10:43:26.449: I/fengjun1010(31537): -------------------mChangeFlag=false 
01-13 10:43:26.449: I/fengjun1010(31537): ----startActivity---,intent=Intent { cmp=com.example.hofyam/.ResultsActivity (has extras) } 
01-13 10:43:26.450: I/fengjun1010(31537): ---ComponentInfo{com.example.hofyam/com.example.hofyam.ResultsActivity} 
01-13 10:43:26.478: D/ActivityThread(31537): ACT-AM_ON_PAUSE_CALLED ActivityRecord{41623298 [email protected] {com.example.hofyam/com.example.hofyam.MainActivity}} 
01-13 10:43:26.504: D/ActivityThread(31537): ACT-PAUSE_ACTIVITY handled : 1/[email protected] 
01-13 10:43:26.508: I/fengjun1010(31537): -----agoldPhoneStateListener----- 
01-13 10:43:26.508: I/fengjun1010(31537): ----------mPhoneListenerFlag=true 
01-13 10:43:26.630: D/NativeCrypto(31537): NativeCrypto_EVP_VerifyInit ctx=0x52c0c020 
01-13 10:43:26.631: D/NativeCrypto(31537): NativeCrypto_EVP_VerifyInit algorithmChars=RSA-SHA1 
01-13 10:43:26.729: I/System.out(31537): [CDS]connect[/212.150.9.60:1433] tm:90 
01-13 10:43:26.730: W/System.err(31537): android.os.NetworkOnMainThreadException 
01-13 10:43:26.758: W/System.err(31537): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1125) 
01-13 10:43:26.758: W/System.err(31537): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84) 
01-13 10:43:26.758: W/System.err(31537): at libcore.io.IoBridge.connectErrno(IoBridge.java:159) 
01-13 10:43:26.758: W/System.err(31537): at libcore.io.IoBridge.connect(IoBridge.java:112) 
01-13 10:43:26.759: W/System.err(31537): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192) 
01-13 10:43:26.759: W/System.err(31537): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) 
01-13 10:43:26.759: W/System.err(31537): at java.net.Socket.startupSocket(Socket.java:575) 
01-13 10:43:26.760: W/System.err(31537): at java.net.Socket.tryAllAddresses(Socket.java:130) 
01-13 10:43:26.760: W/System.err(31537): at java.net.Socket.<init>(Socket.java:180) 
01-13 10:43:26.761: W/System.err(31537): at java.net.Socket.<init>(Socket.java:152) 
01-13 10:43:26.761: W/System.err(31537): at net.sourceforge.jtds.jdbc.SharedSocket.<init>(SharedSocket.java:252) 
01-13 10:43:26.762: W/System.err(31537): at net.sourceforge.jtds.jdbc.ConnectionJDBC2.<init>(ConnectionJDBC2.java:297) 
01-13 10:43:26.762: W/System.err(31537): at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:181) 
01-13 10:43:26.762: W/System.err(31537): at java.sql.DriverManager.getConnection(DriverManager.java:175) 
01-13 10:43:26.763: W/System.err(31537): at java.sql.DriverManager.getConnection(DriverManager.java:140) 
01-13 10:43:26.763: W/System.err(31537): at com.example.hofyam.gaConnection.setConnection(gaConnection.java:24) 
01-13 10:43:26.764: W/System.err(31537): at com.example.hofyam.ResultsActivity.getResultsFromSQL(ResultsActivity.java:32) 
01-13 10:43:26.764: W/System.err(31537): at com.example.hofyam.ResultsActivity.onCreate(ResultsActivity.java:15) 
01-13 10:43:26.765: W/System.err(31537): at android.app.Activity.performCreate(Activity.java:5158) 
01-13 10:43:26.765: W/System.err(31537): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
01-13 10:43:26.766: W/System.err(31537): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148) 
01-13 10:43:26.767: W/System.err(31537): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2211) 
01-13 10:43:26.768: W/System.err(31537): at android.app.ActivityThread.access$600(ActivityThread.java:149) 
01-13 10:43:26.769: W/System.err(31537): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1300) 
01-13 10:43:26.769: W/System.err(31537): at android.os.Handler.dispatchMessage(Handler.java:99) 
01-13 10:43:26.770: W/System.err(31537): at android.os.Looper.loop(Looper.java:153) 
01-13 10:43:26.770: W/System.err(31537): at android.app.ActivityThread.main(ActivityThread.java:5086) 
01-13 10:43:26.770: W/System.err(31537): at java.lang.reflect.Method.invokeNative(Native Method) 
01-13 10:43:26.771: W/System.err(31537): at java.lang.reflect.Method.invoke(Method.java:511) 
01-13 10:43:26.772: W/System.err(31537): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821) 
01-13 10:43:26.772: W/System.err(31537): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584) 
01-13 10:43:26.772: W/System.err(31537): at dalvik.system.NativeStart.main(Native Method) 
01-13 10:43:26.816: W/System.err(31537): java.lang.NullPointerException 
01-13 10:43:26.817: W/System.err(31537): at com.example.hofyam.gaConnection.showResult(gaConnection.java:36) 
01-13 10:43:26.817: W/System.err(31537): at com.example.hofyam.ResultsActivity.getResultsFromSQL(ResultsActivity.java:33) 
01-13 10:43:26.817: W/System.err(31537): at com.example.hofyam.ResultsActivity.onCreate(ResultsActivity.java:15) 
01-13 10:43:26.817: W/System.err(31537): at android.app.Activity.performCreate(Activity.java:5158) 
01-13 10:43:26.817: W/System.err(31537): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
01-13 10:43:26.817: W/System.err(31537): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148) 
01-13 10:43:26.818: W/System.err(31537): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2211) 
01-13 10:43:26.818: W/System.err(31537): at android.app.ActivityThread.access$600(ActivityThread.java:149) 
01-13 10:43:26.818: W/System.err(31537): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1300) 
01-13 10:43:26.818: W/System.err(31537): at android.os.Handler.dispatchMessage(Handler.java:99) 
01-13 10:43:26.818: W/System.err(31537): at android.os.Looper.loop(Looper.java:153) 
01-13 10:43:26.818: W/System.err(31537): at android.app.ActivityThread.main(ActivityThread.java:5086) 
01-13 10:43:26.818: W/System.err(31537): at java.lang.reflect.Method.invokeNative(Native Method) 
01-13 10:43:26.818: W/System.err(31537): at java.lang.reflect.Method.invoke(Method.java:511) 
01-13 10:43:26.818: W/System.err(31537): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821) 
01-13 10:43:26.819: W/System.err(31537): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584) 
01-13 10:43:26.819: W/System.err(31537): at dalvik.system.NativeStart.main(Native Method) 
01-13 10:43:26.819: D/ActivityThread(31537): ACT-AM_ON_RESUME_CALLED ActivityRecord{4166e1d8 [email protected] {com.example.hofyam/com.example.hofyam.ResultsActivity}} 
01-13 10:43:26.822: D/ActivityThread(31537): ACT-LAUNCH_ACTIVITY handled : 0/ActivityRecord{4166e1d8 [email protected] {com.example.hofyam/com.example.hofyam.ResultsActivity}} 
01-13 10:43:26.823: V/InputMethodManager(31537): focusOut: [email protected] [email protected] winFocus=false 
01-13 10:43:26.841: I/SurfaceTextureClient(31537): [void android::SurfaceTextureClient::init()] debug.stc.fps: 3000 ms 
01-13 10:43:26.872: I/SurfaceTextureClient(31537): [void android::SurfaceTextureClient::init()] debug.stc.fps: 3000 ms 
01-13 10:43:26.876: V/InputMethodManager(31537): onWindowFocus: null softInputMode=288 first=true flags=#1810100 
01-13 10:43:26.876: V/InputMethodManager(31537): Starting input: [email protected]f280 
01-13 10:43:26.876: V/InputMethodManager(31537): Starting input: [email protected] ic=null 
01-13 10:43:26.877: V/InputMethodManager(31537): START INPUT: [email protected] ic=null [email protected] controlFlags=#104 
01-13 10:43:26.879: V/InputMethodManager(31537): Starting input: Bind result=InputBindResult{[email protected]0 com.android.inputmethod.latin/.LatinIME #1581} 
01-13 10:43:26.934: D/OpenGLRenderer(31537): Flushing caches (mode 0) 
01-13 10:43:26.960: I/SurfaceTextureClient(31537): [void android::SurfaceTextureClient::init()] debug.stc.fps: 3000 ms 
01-13 10:43:26.972: D/ActivityThread(31537): ACT-STOP_ACTIVITY_HIDE handled : 0/[email protected]

我試過幾個JTDS驅動程序版本：1.3.1,1.2,1.2.5,1.2.7，似乎沒有什麼能解決問題。感謝您的幫助。

來源

2014-01-13 Kfir

你能顯示logcat錯誤嗎？ – blitzen12

發佈了logcat。謝謝 – Kfir

發現問題。發佈它爲了其他人... 嘗試StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); StrictMode.setThreadPolicy(policy); 後，我意識到我必須從主線程開始網絡連接。所以我將使用ASyncTask開始連接到SQL服務器。

來源

2014-01-13 14:46:48 Kfir

聲音環境：

你試過嗎？

項目 - >屬性 - > Java構建路徑 - >訂單和導出..並檢查jar文件的jtds.version.jar 然後去運行配置，並將此jar文件添加到用戶定義的罐子？

來源：stackoverflow.com/questions/18658886

來源

2014-01-13 08:40:45

謝謝傑克，但我是android和eclipse的noob。你能指導我如何將jar添加到用戶定義的jar文件中嗎？ – Kfir

jtds jar是在Java構建路徑庫，如果這就是你的意思。 – Kfir

嗨是的確保確保庫在你的lib文件夾中。然後進入窗口 - >首選項 - > Java構建路徑 - >庫 - >添加JAR並將它們從lib文件夾添加到構建路徑下面是一個很好的示例：http：//www.wikihow .com/Add-JARs-to-Project-Build-Paths-in-Eclipse-（Java） –

在Android中加載jtds驅動程序時出現NoClassDefFoundError

回答

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