EJB学习笔记-4-web应用访问EJB(remote)
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2024-02-22 22:05:22
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首先将ejb的接口文件jar包导入web项目下的lib目录中
如下是jsp文件编码：
<%@ page language="java" import="java.util.*,javax.naming.*,com.manfred.ejb.*;" pageEncoding="GB18030"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
This is my JSP page. <br>
=========================================<br>
以下是web远程调用<br>
<%
final Hashtable jndiProperties = new Hashtable();
jndiProperties.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
Context context;
try{
context = new InitialContext(jndiProperties);
//appName和moduleName分别就打包的格式而定
//如果是.ear就是appName,其它就是moduleName(.jar,.war)
final String appName = "";
final String moduleName = "EJB_01";
final String disctinctName = "";
//实现类名
final String beanName = "HelloWorldBean";
final String viewClassName = HelloWorldRemote.class.getName();
String jndi = "ejb:" + appName + "/" + moduleName + "/"
+ disctinctName + "/" + beanName + "!" + viewClassName;
HelloWorldRemote hwr = (HelloWorldRemote) context.lookup(jndi);
out.println(hwr.sayHello("Manfred"));
} catch (Exception e) {
e.printStackTrace();
}
%>
</body>
</html>