EJB轻松进阶之三

　　3、SecurityBean类才是真正做“正事”的类，它负责对SecurityHome对象传来的字符串执行加密、解密算法，将得到的结果返回给SecurityHome对象。它是一个Stateless sessionBean，按照EJB规范，必须实现SessionBean接口。其源代码如下：

文件“ScurityBean.java”

package securitybeans;

import java.rmi.RemoteException;

import javax.ejb.SessionBean;

import javax.ejb.SessionContext;

public class SecurityBean implements SessionBean

{

public String encrypt( String strSource )

{

String strTarget = "";

for ( int i = strSource.length() - 1; i >= 0; i -- )

{

strTarget += strSource.charAt( i );

}//for


return strTarget;

}//encrypt()


public String decrypt( String strTarget )

{

String strSource = "";


for ( int i = strTarget.length() - 1; i >= 0; i -- )

{

strSource += strTarget.charAt( i );

}//for


return strSource;

}//decrypt()


public void ejbActivate() {}//ejbActivate()