java中读取pdf文件的方法源码和算法介绍

				import com.jacob.com.*;
				
				public class Command extends Dispatch
				{
				  public Command()
				  {
				    super("ADODB.Command");
				  }
				
					/**
					 * This constructor is used instead of a case operation to
					 * turn a Dispatch object into a wider object - it must exist
					 * in every wrapper class whose instances may be returned from
					 * method calls wrapped in VT_DISPATCH Variants.
					 */
					public Command(Dispatch d)
					{
						// take over the IDispatch pointer
					  m_pDispatch = d.m_pDispatch;
						// null out the input's pointer
						d.m_pDispatch = 0;
					}
				
				  public Variant getProperties()
				  {
				    return Dispatch.get(this, "Properties");
				  }
				
				  public Connection getActiveConnection()
				  {
				    return new Connection(Dispatch.get(this, "ActiveConnection").toDispatch());
				  }
				
				  public void setActiveConnection(Connection ppvObject)
				  {
				    Dispatch.put(this, "ActiveConnection", ppvObject);
				  }
				
				  public String getCommandText()
				  {
				    return Dispatch.get(this, "CommandText").toString();
				  }
				
				  public void setCommandText(String pbstr)
				  {
				    Dispatch.put(this, "CommandText", pbstr);
				  }
				
				  public int getCommandTimeout()
				  {
				    return Dispatch.get(this, "CommandTimeout").toInt();
				  }
				
				  public void setCommandTimeout(int plTimeout)
				  {
				    Dispatch.put(this, "CommandTimeout", new Variant(plTimeout));
				  }
				
				  public boolean getPrepared()
				  {
				     return Dispatch.get(this, "Prepared").toBoolean();
				  }
				
				  public void setPrepared(boolean pfPrepared)
				  {
				    Dispatch.put(this, "Prepared", new Variant(pfPrepared));
				  }
				
				  public Recordset Execute(Variant RecordsAffected, Variant Parameters, int Options)
				  {
				    return (Recordset)Dispatch.call(this, "Execute", RecordsAffected, Parameters, new Variant(Options)).toDispatch();
				  }
				
				  public Recordset Execute()
				  {
					  Variant dummy = new Variant();
				    return new Recordset(Dispatch.call(this, "Execute", dummy).toDispatch());
				  }
				
				  public Variant CreateParameter(String Name, int Type, int Direction, int Size, Variant Value)
				  {
				    return Dispatch.call(this, "CreateParameter", Name, new Variant(Type), new Variant(Direction), new Variant(Size), Value);
				  }
				
				  // need to wrap Parameters
				  public Variant getParameters()
				  {
				    return Dispatch.get(this, "Parameters");
				  }
				
				  public void setCommandType(int plCmdType)
				  {
				    Dispatch.put(this, "CommandType", new Variant(plCmdType));
				  }
				
				  public int getCommandType()
				  {
				    return Dispatch.get(this, "CommandType").toInt();
				  }
				
				  public String getName()
				  {
				    return Dispatch.get(this, "Name").toString();
				  }
				
				  public void setName(String pbstrName)
				  {
				    Dispatch.put(this, "Name", pbstrName);
				  }
				
				  public int getState()
				  {
				    return Dispatch.get(this, "State").toInt();
				  }
				
				  public void Cancel()
				  {
				    Dispatch.call(this, "Cancel");
				  }
				}