创建sessionBean
在昨天，我们完成了实体Bean，它实际上是映射到数据库行并为行的每个列定义了getter和setter方法，今天我们来完成sessionBean。
BookControl.java的源代码
package guestbook.maxuan.ejb.control;
import javax.ejb.*;
import java.util.*;
import java.rmi.*;
import guestbook.maxuan.ejb.entity.value.*;
public interface BookControl extends javax.ejb.EJBObject {
public void savely(BookValue value) throws RemoteException;
public ArrayList getLyList() throws RemoteException;
}
BookControlBean的源代码
package guestbook.maxuan.ejb.control;
import javax.ejb.*;
import java.util.*;
import guestbook.maxuan.ejb.entity.*;
import guestbook.maxuan.ejb.entity.value.*;
public class BookControlBean implements SessionBean {
SessionContext sessionContext;
public void ejbCreate() throws CreateException {
/**@todo Complete this method*/
}
public void ejbRemove() {
/**@todo Complete this method*/
}
public void ejbActivate() {
/**@todo Complete this method*/
}
public void ejbPassivate() {
/**@todo Complete this method*/
}
public void setSessionContext(SessionContext sessionContext) {
this.sessionContext = sessionContext;
}
public void savely(BookValue value) {
Book book=null;
try {
javax.naming.Context context = new javax.naming.InitialContext();
BookHome bookHome= (BookHome)context.lookup("Book");
if(value.getAction().equals("add")){
book=bookHome.create(value);
}else{
try{
book=bookHome.findByPrimaryKey(value.getName());
book.setValue(value);
}catch(FinderException fe){
}
}
}catch (Exception ex) {
throw new EJBException(ex);
}
}
public ArrayList getLyList(){
ArrayList LyList=new ArrayList();
try {
javax.naming.Context context = new javax.naming.InitialContext();
BookHome bookHome= (BookHome)context.lookup("Book");
Collection lyCntl = bookHome.findAll();
Iterator iterator = lyCntl.iterator();
while(iterator.hasNext()){
Book book = (Book) iterator.next();
LyList.add(book.getValue());
}
}catch (Exception ex) {
throw new EJBException(ex);
}
return LyList;
}
}
BookControlHome的源代码 package guestbook.maxuan.ejb.control;
import javax.ejb.*;
import java.util.*;
import java.rmi.*;
public interface BookControlHome extends javax.ejb.EJBHome {
public BookControl create() throws CreateException, RemoteException;
}
这样我们就完成了sessionBean的编写，它操作实体Bean赋于value的值， 这里比上次的教程多了写入的操作！
出处：蓝色理想
责任编辑：蓝色
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