SAP JCO JAVA無法初始化類com.sap.conn.jco.JCo

我想使用SAP JCO爲我的java程序選擇用戶數據。SAP JCO JAVA無法初始化類com.sap.conn.jco.JCo

但我的一切是：

Sep 23, 2014 1:34:28 PM org.apache.catalina.core.StandardWrapperValve invoke 
SEVERE: Servlet.service() for servlet [StepByStepClient] in context with path [/Formularmanager-test] threw exception [Servlet execution threw an exception] with root cause 
java.lang.NoClassDefFoundError: Could not initialize class com.sap.conn.jco.JCo 
    at com.sap.conn.jco.JCoDestinationManager.getDestination(JCoDestinationManager.java:61) 
    at com.pferd.itdienste.sap.StepByStepClient.step1Connect(StepByStepClient.java:125) 
    at com.pferd.itdienste.sap.StepByStepClient.processRequest(StepByStepClient.java:356) 
    at com.pferd.itdienste.sap.StepByStepClient.doGet(StepByStepClient.java:70) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) 
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1852) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source)

對於測試我使用的示例腳本「StepByStepClient」和我有修改此而已，所以我可以把它作爲一個網頁的servlet。

來自sap jco的所有文件都在「C：\ sapjco30P_11-10005326」上，並且我已將此文件夾註冊在系統pfad變量中。

在這一刻，我不知道我的錯誤在哪裏！所以我需要幫助，請！

SAP Java連接 Java運行時操作系統：Windows Server 2012中6.2 AMD64 Java虛擬機：1.7.0_60 Oracle公司默認字符集：窗口1252

版本

JCO API： 3.0.11（2014-04-15）
JCo中間件：JavaRfc 2.2.12
JCo庫：720.612

庫路徑

路徑JCO檔案：C：\ sapjco30P_11-10005326 \ sapjco3.jar
路徑JCO庫：C：\ sapjco30P_11-10005326 \ sapjco3.dll

的Eclipse朱諾 XAMPP的Tomcat 7

package com.pferd.itdienste.sap; 

import java.io.File; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.util.Properties; 
import java.util.concurrent.CountDownLatch; 

import javax.servlet.ServletException; 
import javax.servlet.annotation.WebServlet; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 

import com.sap.conn.jco.AbapException; 
import com.sap.conn.jco.JCoContext; 
import com.sap.conn.jco.JCoDestination; 
import com.sap.conn.jco.JCoDestinationManager; 
import com.sap.conn.jco.JCoException; 
import com.sap.conn.jco.JCoField; 
import com.sap.conn.jco.JCoFunction; 
import com.sap.conn.jco.JCoFunctionTemplate; 
import com.sap.conn.jco.JCoStructure; 
import com.sap.conn.jco.JCoTable; 
import com.sap.conn.jco.ext.DestinationDataProvider; 

@WebServlet(name = "StepByStepClient", urlPatterns = {"/StepByStepClient"}) 
public class StepByStepClient extends HttpServlet 
{ 
    static String ABAP_AS = "ABAP_AS_WITHOUT_POOL"; 
    static String ABAP_AS_POOLED = "ABAP_AS_WITH_POOL"; 
    static String ABAP_MS = "ABAP_MS_WITHOUT_POOL";  
    static 
    { 
     Properties connectProperties = new Properties(); 
     connectProperties.setProperty(DestinationDataProvider.JCO_ASHOST, "HOST"); 
     connectProperties.setProperty(DestinationDataProvider.JCO_SYSNR, "01"); 
     connectProperties.setProperty(DestinationDataProvider.JCO_CLIENT, "200"); 
     connectProperties.setProperty(DestinationDataProvider.JCO_USER, "USER"); 
     connectProperties.setProperty(DestinationDataProvider.JCO_PASSWD, "PASSWORD"); 
     connectProperties.setProperty(DestinationDataProvider.JCO_LANG, "en"); 
     createDataFile(ABAP_AS, "jcoDestination", connectProperties); 

     connectProperties.setProperty(DestinationDataProvider.JCO_POOL_CAPACITY, "3"); 
     connectProperties.setProperty(DestinationDataProvider.JCO_PEAK_LIMIT, "10"); 
     createDataFile(ABAP_AS_POOLED, "jcoDestination", connectProperties); 

     connectProperties.clear(); 
     connectProperties.setProperty(DestinationDataProvider.JCO_MSHOST, "HOST"); 
     connectProperties.setProperty(DestinationDataProvider.JCO_R3NAME, "SID"); 
     connectProperties.setProperty(DestinationDataProvider.JCO_CLIENT, "200"); 
     connectProperties.setProperty(DestinationDataProvider.JCO_USER, "USER"); 
     connectProperties.setProperty(DestinationDataProvider.JCO_PASSWD, "PASSWORD"); 
     connectProperties.setProperty(DestinationDataProvider.JCO_GROUP, "GROUP"); 
     connectProperties.setProperty(DestinationDataProvider.JCO_LANG, "en"); 
     createDataFile(ABAP_MS, "jcoDestination", connectProperties); 
    } 

    /** 
    * Handles the HTTP <code>GET</code> method. 
    * @param request servlet request 
    * @param response servlet response 
    * @throws ServletException if a servlet-specific error occurs 
    * @throws IOException if an I/O error occurs 
    */ 
    @Override 
    protected void doGet(HttpServletRequest request, HttpServletResponse response) 
      throws ServletException, IOException { 
     try { 
      processRequest(request, response); 
     } catch (JCoException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
    } 

    /** 
    * Handles the HTTP <code>POST</code> method. 
    * @param request servlet request 
    * @param response servlet response 
    * @throws ServletException if a servlet-specific error occurs 
    * @throws IOException if an I/O error occurs 
    */ 
    @Override 
    protected void doPost(HttpServletRequest request, HttpServletResponse response) 
      throws ServletException, IOException { 
     try { 
      processRequest(request, response); 
     } catch (JCoException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
    } 

    /** 
    * Returns a short description of the servlet. 
    * @return a String containing servlet description 
    */ 
    @Override 
    public String getServletInfo() { 
     return "Short description"; 
    }// </editor-fold>  

    static void createDataFile(String name, String suffix, Properties properties) 
    { 
     File cfg = new File(name+"."+suffix); 
     if(!cfg.exists()) 
     { 
      try 
      { 
       FileOutputStream fos = new FileOutputStream(cfg, false); 
       properties.store(fos, "for tests only !"); 
       fos.close(); 
      } 
      catch (Exception e) 
      { 
       throw new RuntimeException("Unable to create the destination file " + cfg.getName(), e); 
      } 
     } 
    } 


    public static void step1Connect() throws JCoException 
    { 
     JCoDestination destination = JCoDestinationManager.getDestination(ABAP_AS); 
     System.out.println("Attributes:"); 
     System.out.println(destination.getAttributes()); 
     System.out.println(); 

     destination = JCoDestinationManager.getDestination(ABAP_MS); 
     System.out.println("Attributes:"); 
     System.out.println(destination.getAttributes()); 
     System.out.println(); 
    } 

    public static void step2ConnectUsingPool() throws JCoException 
    { 
     JCoDestination destination = JCoDestinationManager.getDestination(ABAP_AS_POOLED); 
     destination.ping(); 
     System.out.println("Attributes:"); 
     System.out.println(destination.getAttributes()); 
     System.out.println(); 
    } 

    public static void step3SimpleCall() throws JCoException 
    { 
     JCoDestination destination = JCoDestinationManager.getDestination(ABAP_AS_POOLED); 
     JCoFunction function = destination.getRepository().getFunction("STFC_CONNECTION"); 
     if(function == null) 
      throw new RuntimeException("BAPI_COMPANYCODE_GETLIST not found in SAP."); 

     function.getImportParameterList().setValue("REQUTEXT", "Hello SAP"); 

     try 
     { 
      function.execute(destination); 
     } 
     catch(AbapException e) 
     { 
      System.out.println(e.toString()); 
      return; 
     } 

     System.out.println("STFC_CONNECTION finished:"); 
     System.out.println(" Echo: " + function.getExportParameterList().getString("ECHOTEXT")); 
     System.out.println(" Response: " + function.getExportParameterList().getString("RESPTEXT")); 
     System.out.println(); 
    } 

    public static void step3WorkWithStructure() throws JCoException 
    { 
     JCoDestination destination = JCoDestinationManager.getDestination(ABAP_AS_POOLED); 
     JCoFunction function = destination.getRepository().getFunction("RFC_SYSTEM_INFO"); 
     if(function == null) 
      throw new RuntimeException("RFC_SYSTEM_INFO not found in SAP."); 

     try 
     { 
      function.execute(destination); 
     } 
     catch(AbapException e) 
     { 
      System.out.println(e.toString()); 
      return; 
     } 

     JCoStructure exportStructure = function.getExportParameterList().getStructure("RFCSI_EXPORT"); 
     System.out.println("System info for " + destination.getAttributes().getSystemID() + ":\n"); 
     for(int i = 0; i < exportStructure.getMetaData().getFieldCount(); i++) 
     { 
      System.out.println(exportStructure.getMetaData().getName(i) + ":\t" + exportStructure.getString(i)); 
     } 
     System.out.println(); 

     //JCo still supports the JCoFields, but direct access via getXX is more efficient as field iterator 
     System.out.println("The same using field iterator: \nSystem info for " + destination.getAttributes().getSystemID() + ":\n"); 
     for(JCoField field : exportStructure) 
     { 
      System.out.println(field.getName() + ":\t" + field.getString()); 
     } 
     System.out.println(); 
    } 

    public static void step4WorkWithTable() throws JCoException 
    { 
     JCoDestination destination = JCoDestinationManager.getDestination(ABAP_AS_POOLED); 
     JCoFunction function = destination.getRepository().getFunction("BAPI_COMPANYCODE_GETLIST"); 
     if(function == null) 
      throw new RuntimeException("BAPI_COMPANYCODE_GETLIST not found in SAP."); 

     try 
     { 
      function.execute(destination); 
     } 
     catch(AbapException e) 
     { 
      System.out.println(e.toString()); 
      return; 
     } 

     JCoStructure returnStructure = function.getExportParameterList().getStructure("RETURN"); 
     if (! (returnStructure.getString("TYPE").equals("")||returnStructure.getString("TYPE").equals("S")) ) 
     { 
      throw new RuntimeException(returnStructure.getString("MESSAGE")); 
     } 

     JCoTable codes = function.getTableParameterList().getTable("COMPANYCODE_LIST"); 
     for (int i = 0; i < codes.getNumRows(); i++) 
     { 
      codes.setRow(i); 
      System.out.println(codes.getString("COMP_CODE") + '\t' + codes.getString("COMP_NAME")); 
     } 

     codes.firstRow(); 
     for (int i = 0; i < codes.getNumRows(); i++, codes.nextRow()) 
     { 
      function = destination.getRepository().getFunction("BAPI_COMPANYCODE_GETDETAIL"); 
      if (function == null) 
       throw new RuntimeException("BAPI_COMPANYCODE_GETDETAIL not found in SAP."); 

      function.getImportParameterList().setValue("COMPANYCODEID", codes.getString("COMP_CODE")); 
      function.getExportParameterList().setActive("COMPANYCODE_ADDRESS",false); 

      try 
      { 
       function.execute(destination); 
      } 
      catch (AbapException e) 
      { 
       System.out.println(e.toString()); 
       return; 
      } 

      returnStructure = function.getExportParameterList().getStructure("RETURN"); 
      if (! (returnStructure.getString("TYPE").equals("") || 
        returnStructure.getString("TYPE").equals("S") || 
        returnStructure.getString("TYPE").equals("W"))) 
      { 
       throw new RuntimeException(returnStructure.getString("MESSAGE")); 
      } 

      JCoStructure detail = function.getExportParameterList().getStructure("COMPANYCODE_DETAIL"); 

      System.out.println(detail.getString("COMP_CODE") + '\t' + 
           detail.getString("COUNTRY") + '\t' + 
           detail.getString("CITY")); 
     }//for 
    } 

    /** 
    * this example shows the "simple" stateful call sequence. Since all calls belonging to one 
    * session are executed within the same thread, the application does not need 
    * to take care about the SessionReferenceProvider. MultithreadedExample.java 
    * illustrates the more complex scenario, where the calls belonging to one session are 
    * executed from different threads. 
    * 
    * Note: this example uses Z_GET_COUNTER and Z_INCREMENT_COUNTER. The most ABAP systems 
    * contain function modules GET_COUNTER and INCREMENT_COUNTER, that are not remote enabled. 
    * Copy these functions to Z_GET_COUNTER and Z_INCREMENT_COUNTER (or implement as wrapper) 
    * and mark they remote enabled 
    * @throws JCoException 
    */ 
    public static void step4SimpleStatefulCalls() throws JCoException 
    { 
     final JCoFunctionTemplate incrementCounterTemplate, getCounterTemplate; 

     JCoDestination destination = JCoDestinationManager.getDestination(ABAP_MS); 
     incrementCounterTemplate = destination.getRepository().getFunctionTemplate("Z_INCREMENT_COUNTER"); 
     getCounterTemplate = destination.getRepository().getFunctionTemplate("Z_GET_COUNTER"); 
     if(incrementCounterTemplate == null || getCounterTemplate == null) 
      throw new RuntimeException("This example cannot run without Z_INCREMENT_COUNTER and Z_GET_COUNTER functions"); 

     final int threadCount = 5; 
     final int loops = 5; 
     final CountDownLatch startSignal = new CountDownLatch(threadCount); 
     final CountDownLatch doneSignal = new CountDownLatch(threadCount); 

     Runnable worker = new Runnable() 
     { 
      public void run() 
      { 
       startSignal.countDown(); 
       try 
       { 
        //wait for other threads 
        startSignal.await(); 

        JCoDestination dest = JCoDestinationManager.getDestination(ABAP_MS); 
        JCoContext.begin(dest); 
        try 
        { 
         for(int i=0; i < loops; i++) 
         { 
          JCoFunction incrementCounter = incrementCounterTemplate.getFunction(); 
          incrementCounter.execute(dest); 
         } 
         JCoFunction getCounter = getCounterTemplate.getFunction(); 
         getCounter.execute(dest); 

         int remoteCounter = getCounter.getExportParameterList().getInt("GET_VALUE"); 
         System.out.println("Thread-" + Thread.currentThread().getId() + 
           " finished. Remote counter has " + (loops==remoteCounter?"correct":"wrong") + 
           " value [" + remoteCounter + "]"); 
        } 
        finally 
        { 
         JCoContext.end(dest);      
        } 
       } 
       catch(Exception e) 
       { 
        System.out.println("Thread-" + Thread.currentThread().getId() + " ends with exception " + e.toString()); 
       } 

       doneSignal.countDown(); 
      } 
     }; 

     for(int i = 0; i < threadCount; i++) 
     { 
      new Thread(worker).start(); 
     } 

     try 
     { 
      doneSignal.await(); 
     } 
     catch(Exception e) 
     { 
     } 

    } 

    protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws JCoException 
    { 
     step1Connect(); 
     step2ConnectUsingPool(); 
     step3SimpleCall(); 
     step4WorkWithTable(); 
     step4SimpleStatefulCalls(); 
    } 
}

來源

2014-09-23 user2372543

請問您可以添加完整的堆棧跟蹤，而不是截止版本？ – vwegert 2014-09-23 11:23:46

我已經從我的日誌中添加完整的錯誤信息 – user2372543 2014-09-23 14:24:12

罐子文件包含com.sap.conn.jco.JCo不在類路徑中。你確定你已經正確地將它設置爲一個JVM參數嗎？將它添加到PATH變量不會起作用，因爲您的JVM不會讀取該變量。

來源

2014-09-23 11:32:47

不，但現在我已經添加了一個系統變量「CLASSPATH」與正確的路徑，沒有任何改變。我如何正確設置是作爲JVM參數？在eclipse中，我已經在「構建路徑」 - >「添加外部類文件夾」下添加了.dll和.jar文件的右側文件夾，並且.jar文件被添加爲外部jar文件。 – user2372543 2014-09-23 14:35:16

正如所說，JCo jar文件在執行過程中不可訪問。
我認爲你可以將jar（和dll）放在webapp的webinf/lib目錄下，或者將它們放在Tomcat的公共lib目錄下，如果多個應用程序可以使用lib。

來源

2014-09-25 08:16:56

SAP JCO JAVA無法初始化類com.sap.conn.jco.JCo

回答

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