Android java.lang.RuntimeException:执行doInBackground（）Kotlin时出错

我试图在本地访问我的MS数据库，所以我有一个DatabaseHelper.kt文件，其中包括Doinbackground函数，这反过来会导致这个错误

06-19 15:28:45.082 18819-18819/? E/合子：mountSimulatedStorage（）06-19 15:28:45.082 18819-18819/？E/合子：v2 06-19 15:28:45.092 18819-18819/？E/SELinux:[调试]获取类别：变量seinfo:默认灵敏度：NULL，类别：NULL 06-19 15:28:45.092 18819-18819/？E/art:pid 18819的setrlimit（RLIMIT_CORE）失败：不允许操作06-19 15:28:47.814 18819-18819/com.example.mysqlcon E/RecyclerView:未连接适配器；跳过布局06-19 15:28:47.924 18819-18819/com.example.mysqlcon E/RecyclerView：未连接适配器；跳过布局06-19 15:28:47.984 18819-18862/com.example.mysqlcon E/AndroidRuntime:致命异常：AsyncTask#1

进程：com.example.mysqlcon，PID:18819 java.lang.RuntimeException:执行doInBackground（）时出错

在android.os.AsyncTask$3.done（AsyncTask.java:304）在java.util.concurrent.FutureTask.finishCompletion（FutureTask.java:355）在java.util.concurrent.FutureTask.run（FutureTask.java:242）在android.os.AsyncTask$SerialExecutor$1.run（AsyncTask.java:231）上运行java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1112）java.util.concurrent.ThreadPoolExecutor$Worker.run（ThreadPoolExecutor.java:587）java.lang.Thread.java:818）由以下原因引起：java.lang.NoClassDefFoundError:解析失败：Lorg/ietf/JGSSMAnager；net.sourceforge.jtds.jdbc.TdsCore.createGssToken（TdsCore.java:4400）net.sourceforge.jtds.jdbc.TdsCore.sendMSLoginPkt（TdsCore.java:1971）net.sourceforge.jtds.jdbc.TdsCore.login（TdsCore.java:617）net.sourceforge.jtds.jdbc.jtddsconnection.（jtddsconnection.java:371）net.sourceforge.jtdds.jdbc.Driver.connect（Driver.java:184）在com.example.mysqlcon.ConnectionClass.dbConn（ConnectionClass.kt:26）的com.example.mysqlcon.DatabaseHelper$SyncData.doInBackground（DatabaseHelper.kt:36）的java.sql.DriverManager.getConnection（DriverManager.java:179）和java.sql.DriverManager.getConnection（DriverManager.java:144）上在android.os.AsyncTask$2.call（AsyncTask.java:292）在java.util.concurrent.FutureTask.run（FutureTask.java:237）在android.os.AsyncTask$SerialExecutor$1.run（AsyncTask.java:231）在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1112）在java.util.concurrent.ThreadPoolExecutor$Worker.run（ThreadPoolExecutor.java:587）位于java.lang.Thread.run（Thread.java:818）

原因：java.lang.ClassNotFoundException:在路径：DexPathList[[zip文件”//data/app/com.example.mysqlcon-1/base.apk“]，nativeLibraryDirectories=[/vendor/lib，/system/lib]上未找到类“org.ietf.jgssmanager” dalvik.system.BaseDexClassLoader.findClass（BaseDexClassLoader.java:56）java.lang.ClassLoader.loadClass（ClassLoader.java:511）java.lang.ClassLoader.loadClass（ClassLoader.java:469）net.sourceforge.jtdds.jdbc.TdsCore.createGssToken（TdsCore.java:4400）net.sourceforge.jtdds.jdbc.TdsCore.sendmloginpkt（TdsCore.java:1971）net.sourceforge.jtds.jdbc.TdsCore.login（TdsCore.java:617）net.sourceforge.jtds.jdbc.JtdsConnection.（JtdsConnection.java:371）net.sourceforge.jtds.jdbc.Driver.connect（Driver.java:184）java.sql.DriverManager.getConnection（DriverManager.java:179）java.sql.DriverManager.getConnection（DriverManager.java:144）com.example.mysqlcon.ConnectionClass.dbConn（ConnectionClass.kt:26）com.example.mysqlcon.DatabaseHelper$SyncData.doInBackground（DatabaseHelper.kt:36）com.example.mysqlcon.DatabaseHelper$SyncData.doInBackground（DatabaseHelper.kt:23）android.os.AsyncTask$2.call（AsyncTask.java:292）java.util.concurrent.FutureTask.run（FutureTask.java:237）在android.os.AsyncTask$SerialExecutor$1.run（AsyncTask.java:231）在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1112）上运行（AsyncTask.java:231）
java.lang.Thread.run（Thread.java:818）处的java.util.concurrent.ThreadPoolExecutor$Worker.run（ThreadPoolExecutor.java:587）被抑制：java.lang.ClassNotFoundException:org.ietf.jgss.GSSManager位于java.lang.Class.classForName（本机方法）位于java.lang.BootClassLoader.findClass（ClassLoader.java:781）位于java.lang.BootClassLoader.loader.loader.loadClass（ClassLoader.java:841）位于java.lang.ClassLoader.loadClass（ClassLoader.java:504）

…17更多原因：java.lang.NoClassDefFoundError:使用引导类加载程序找不到类；没有可用堆栈06-19 15:28:48.064 18819-18819/com.example.mysqlcon E/WindowManager:android.view.WindowLeaked:Activity com.example.mysqlcon.InvoiceActivity已泄漏window com.android.internal.policy.impl.PhoneWindow$DecorView{11c938 V.E..R..D 0,0-681215}最初添加于android.view.ViewRootImpl.（ViewRootImpl.java:530）的android.view.WindowManagerGlobal.addView（WindowManagerGlobal.java:287）的android.view.WindowManagerImpl.addView（WindowManagerImpl.java:91）的android.app.Dialog.show（Dialog.java:325）的android.app.ProgressDialog.show（ProgressDialog.java:151）在android.app.ProgressDialog.show（ProgressDialog.java:134）在com.example.mysqlcon.DatabaseHelper$SyncData.onPreExecute（DatabaseHelper.kt:31）在android.os.AsyncTask.execute（AsyncTask.java:591）在android.os.AsyncTask.AsyncTask.java:539）在com.execute.execute.execute.execute.execute.exec（DatabaseHelper.kt:92）位于com.example.mysqlcon.InvoiceActivity.onCreate（InvoiceActivity.kt:21）位于android.app.Activity.performCreate（Activity.java:6609）位于android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1134）位于android.app.ActivityThread.performLaunchActivity（ActivityThread.java:3104）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:3261）中，在android.app.Act中

java.lang.Thread.run(Thread.java:818) Caused by: 
java.lang.NoClassDefFoundError: Failed resolution of: 
Lorg/ietf/jgss/GSSManager; at