readerjavabean.java

java EJB 编程源代码。

package library.jb;

import java.util.*;
import java.sql.*;
import javax.ejb.*;
import javax.naming.*;
import javax.rmi.*;
import library.ejb.*;

//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
//这是一个JavaBean类，这个类是用来连接JSP脚本和Entity Bean中的Home接口
//及Remote接口的。当用户点击JSP网页中的某项操作时，由ReaderJavaBean来调用
//Home接口或Remote接口中的某一个方法进行处理。
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

public class ReaderJavaBean
  {
   ReaderInfoHomeInt readerinfohomeint = null;
   private String readname = null;
   private String cardid = null;
   private String password = null;
   private String address = null;
   private String email = null;

   public ReaderJavaBean() throws Exception
     {
      //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
      //建立一个ReaderJavaBean类的构造器
      //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

      try
        {
         Context initcontext = new InitialContext();
         Object obj = initcontext.lookup("ejb/LibraryEntityBean");
         readerinfohomeint = (ReaderInfoHomeInt)PortableRemoteObject.narrow(obj,ReaderInfoHomeInt.class);
        }
      catch(Exception e)
        {
         throw new Exception(e.toString());
        }
     }

   public void updateReaderInfo() throws Exception
     {
      //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
      //实现对数据记录的更新
      //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

      try
        {
         ReaderInfoRemoteInt readerinforemoteint = readerinfohomeint.findByPrimaryKey(cardid);
         readerinforemoteint.setReaderInfo(readname,cardid,password,address,email);
        }
      catch(Exception e)
        {
         throw new Exception("系统出现例外，无法更新数据！");
        }
     }

   public void insertReaderInfo() throws Exception
     {
      //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
      //实现将一条新的记录插入到数据表中
      //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

      try
        {
         ReaderInfoRemoteInt readerinforemoteint = readerinfohomeint.create(readname,cardid,password,address,email);
         password=readerinforemoteint.getPassword();
        }
      catch(Exception e)
        {
         throw new Exception("系统出现例外，无法添加新的数据！");
        }
     }

   public void cancelReaderInfo() throws Exception
     {
      //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
      //实现将一个读者的信息从数据表中删除
      //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

      try
        {
         ReaderInfoRemoteInt readerinforemoteint = readerinfohomeint.findByPrimaryKey(cardid);
         readerinforemoteint.remove();
        }
      catch(Exception e)
        {
         throw new Exception("系统出现例外，无法删除数据！");
        }
     }

   public int isRegReader() throws Exception
     {
      //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
      //实现判断一个登录者是否已经注册
      //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

      int isReader = 0;

      try
        {
         ReaderInfoRemoteInt readerinforemoteint = readerinfohomeint.findByPrimaryKey(cardid);
         if(readerinforemoteint.getCardID().equals(cardid) && readerinforemoteint.getPassword().equals(password))
           {
            isReader = 1;
           }
         else
           {
            isReader = 0;
           }
        }
      catch(Exception e)
        {
         isReader = 0;
        }

      return isReader;
     }

   public void setReadname(String readname)
     {
      this.readname = readname;
     }

   public String getReadname()
     {
      return this.readname;
     }

   public void setCardid(String cardid)
     {
      this.cardid = cardid;
     }

   public String getCardid()
     {
      return this.cardid;
     }

   public void setPassword(String password)
     {
      this.password = password;
     }

   public String getPassword()
     {
      return this.password;
     }

   public void setAddress(String address)
     {
      this.address = address;
     }

   public String getAddress()
     {
      return this.address;
     }

   public void setEmail(String email)
     {
      this.email = email;
     }

   public String getEmail()
     {
      return this.email;
     }
  }