有状态会话Bean实例

K:\test23\ejb\src\StatefulHome.java

package ejbs;

public interface StatefulHome extends javax.ejb.EJBHome {
public Stateful create(String str) throws java.rmi.RemoteException, javax.ejb.CreateException;
}

K:\test23\ejb\src\Stateful.java

package ejbs;

public interface Stateful extends javax.ejb.EJBObject {
public void append(String str) throws java.rmi.RemoteException;
public String getStr() throws java.rmi.RemoteException;
}

K:\test23\ejb\src\StatefulBean.java

package ejbs;

public class StatefulBean implements javax.ejb.SessionBean {
public void ejbCreate(String str) throws javax.ejb.EJBException {
this.str = str;
}
public void ejbRemove() throws javax.ejb.EJBException {}
public void ejbPassivate() {}
public void ejbActivate() {}
public void setSessionContext(javax.ejb.SessionContext sctx) {}

private String str;
public String getStr() {
return this.str;
}
public void append(String str) {
this.str += str;
}
}

K:\test23\ejb\META-INF\ejb-jar.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC '-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN' 'http://java.sun.com/dtd/ejb-jar_2_0.dtd'>

<ejb-jar>
<display-name>aaaaaaaa</display-name>
<enterprise-beans>
<session>
<ejb-name>Stateful</ejb-name>
<home>ejbs.StatefulHome</home>
<remote>ejbs.Stateful</remote>
<ejb-class>ejbs.StatefulBean</ejb-class>
<session-type>Stateful</session-type>
<transaction-type>Bean</transaction-type>
</session>
</enterprise-beans>
</ejb-jar>

K:\test23\web\stateful.jsp

<%@ page contentType="text/html;charset=GBK" %>
<%
String str = request.getParameter("str");
String message = "nothing";
try {
javax.naming.InitialContext ictx = new javax.naming.InitialContext();
Object objRef = ictx.lookup("Stateful");
ejbs.StatefulHome home = (ejbs.StatefulHome) javax.rmi.PortableRemoteObject.narrow(objRef, ejbs.StatefulHome.class);
ejbs.Stateful remote = home.create(str);
remote.append(", welcome to our site!");
message = remote.getStr();
} catch (java.rmi.RemoteException re) {
} catch (javax.ejb.CreateException ce) {
} catch (javax.naming.NamingException ne) {
}
%>

<h1><%=message%></h1>

K:\test23\web\WEB-INF\web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4" >

<ejb-ref>
<ejb-ref-name>Stateful</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
<home>ejbs.StatefulHome</home>
<remote>ejbs.Stateful</remote>
<ejb-link>Stateful</ejb-link>
</ejb-ref>

</web-app>

K:\test23\META-INF\application.xml

<?xml version="1.0" encoding="UTF-8"?>

<application>
<display-name>aaaaaaaaa</display-name>
<module>
<web>
<web-uri>stateful.war</web-uri>
<context-root>/stateful</context-root>
</web>
</module>
<module>
<ejb>
stateful.jar
</ejb>
</module>
</application>

K:\test23\build.bat

set ear_name=stateful
set ejb_name=ejb
set web_name=web
set server_path=K:\jboss\server\default\deploy

cd %ejb_name%
javac -classpath %classpath% -d . .\src\*.java
jar cvf ..\%ear_name%.jar *.*
cd ..
cd %web_name%
jar cvf ..\%ear_name%.war *.*
cd ..
jar cvf %server_path%\%ear_name%.ear META-INF/ %ear_name%.war %ear_name%.jar

结果：

http://localhost:4000/stateful/stateful.jsp?str=bitan

bitan, welcome to our site!