执行Stored Proc时发生运行时异常java.lang.ClassNotFoundException

当我尝试从weblogic执行Pointbase中的存储过程时，出现以下错误。执行Stored Proc时发生运行时异常java.lang.ClassNotFoundException

java.sql.SQLException: The external "DbLog::insLog" routine had the following runtime exception "java.lang.ClassNotFoundException: DbLog"

所以我设置好的类路径中commEnv.cmd如下，

set POINTBASE_HOME=%WL_HOME%\common\eval\pointbase 
set POINTBASE_CLIENT_CLASSPATH=%POINTBASE_HOME%\lib\pbclient57.jar 
set POINTBASE_CLASSPATH=%POINTBASE_HOME%\lib\pbembedded57.jar;%POINTBASE_CLIENT_CLASSPATH%;C:\bea\user_projects\workspaces\work1\utility\build\classes 
set POINTBASE_TOOLS=%POINTBASE_HOME%\lib\pbtools57.jar

我DBLOG类是在路径C：\ BEA \ user_projects \工作区\工作1 \ UTIL \建立\班\ net \ local \ util \ common FYI，net \ local \ util \ common是包结构。

但是，当我尝试执行它调用RequestFilter.java的页面，我收到以下错误，

Error 500--Internal Server Error 
java.lang.NoClassDefFoundError: Could not initialize class net.local.util.common.DbLog

--RequestFilter.java

import net.local.util.common.DbLog; 

    public final class RequestFilter { 

    public void log() { 

    DbLog dblog = new DbLog(); 
    dblog.logPreAuth(); 
    } 
    }

--DbLog.java

package net.local.util.common; 

    import java.sql.*; 
    import org.apache.log4j.Logger; 
    import com.pointbase.jdbc.*; 


    public class DbLog { 


     private static final Logger logger = Logger.getLogger(DbLog.class); 
     private static boolean DEBUGGING = logger.isDebugEnabled(); 
     private Connection conn = null; 
     private Statement m_stmt; 
     private Statement l_stmt; 
     private CallableStatement m_callStmt = null; 
     //static ResultSet l_rs = null; 

public DbLog() { 

     logger.info("DbLog constructor called"); 
     init(); 

    } 

    public void init() { 
     logger.info("DbLog init called"); 
    } 




    public void logPreAuth() { 

      try { 
       logger.info("Inside logPreAuth method"); 



       String I_URL = "jdbc:pointbase:server://localhost:9093/weblogic_eval"; 
       Class.forName("com.pointbase.jdbc.jdbcUniversalDriver").newInstance(); 
       //Class.forName("com.pointbase.jdbc.jdbcDataSource"); 
       conn = DriverManager.getConnection(I_URL, "PBPUBLIC", "PBPUBLIC"); 

      String SQL_CREATE_PROC = "CREATE PROCEDURE insLog(IN P1 VARCHAR(30))" 
        + " LANGUAGE JAVA" 
        + " SPECIFIC insLog" 
        + " DETERMINISTIC" 
        + " NO SQL" 
        + " EXTERNAL NAME \"DbLog::insLog\"" 
        + " PARAMETER STYLE SQL";  


       m_stmt = conn.createStatement(); 
       m_stmt.executeUpdate(SQL_CREATE_PROC); 
       m_stmt.close();  
       m_callStmt = conn.prepareCall("{ call PBPUBLIC.insLog(?) }"); 
       m_callStmt.setString(1, "Success!!"); 
       m_callStmt.execute();  

      } 


      catch (Exception e) { 
       logger.error("Error in logPreAuth method" + e); 
      } 


     } 

    public void insLog(String test) 
    { 
     try { 

      l_stmt = conn.createStatement(); 
      l_stmt.execute("Insert into logs values('" + test + "')"); 
      l_stmt.close(); 
      conn.close(); 
     } 
     catch (Exception e) { 

     } 

    } 
    }

来源

2012-03-07 a a

真正的错误是进一步在堆栈跟踪。发布整个堆栈跟踪。 – 2012-03-07 20:50:56

java.lang.NoClassDefFoundError: Could not initialize class net.local.util.common.DbLog

这基本上米意味着Class.forName("net.local.util.common.DbLog")失败，并发生异常。这反过来可能意味着有问题的类的任何static变量或初始化块都会抛出未处理的异常。它们是在上课时执行的。

您在该类已经两个：这样

private static final Logger logger = Logger.getLogger(DbLog.class); 
private static boolean DEBUGGING = logger.isDebugEnabled();

他们要么已抛出异常。它的堆栈跟踪在日志中进一步可见。回去阅读您的日志并检查堆栈跟踪的最底层异常。这是第一个根本原因。它应该足够自我解释。也许在运行时类路径中缺少Log4j等等。

来源

2012-03-07 20:42:37 BalusC

执行Stored Proc时发生运行时异常java.lang.ClassNotFoundException

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