EJB学习笔记-6-传值和传址

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传值就是remote方式，参数必须实现序列化

传址就是local方式。

entitybean:

package com.manfred.entity;import java.io.Serializable;public class User implements Serializable {private String username;private int id;public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public int getId() {return id;}public void setId(int id) {this.id = id;}}

session bean:

package com.manfred.session.impl;import javax.ejb.Local;import javax.ejb.Remote;import javax.ejb.Stateless;import com.manfred.entity.User;import com.manfred.session.UserManagerLocal;import com.manfred.session.UserManagerRemote;@Stateless@Remote({UserManagerRemote.class})@Local({UserManagerLocal.class})public class UserManagerBean implements UserManagerLocal, UserManagerRemote {public void addUser(User user) {user.setId(1000);System.out.println("username = " + user.getUsername());}}

两个接口方式（remote和local）

package com.manfred.session;import com.manfred.entity.User;public interface UserManagerLocal {public void addUser(User user);}

package com.manfred.session;import com.manfred.entity.User;public interface UserManagerRemote {public void addUser(User user);}

web中的jsp文件的编码：

<%@page import="com.manfred.session.impl.UserManagerBean"%><%@ page language="java" import="java.util.*,javax.naming.*,com.manfred.session.*,com.manfred.entity.*" 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>    <%    final Properties jndiProperties = new Properties();    jndiProperties.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");    final Context context = new InitialContext(jndiProperties);    final String appName = "";    final String remoteModuleName = "EJB_03";    final String localModuleName = "EJB_03_web";    final String distinctName = "";    final String beanName = UserManagerBean.class.getSimpleName();    final String remoteViewClassName = UserManagerRemote.class.getName();    final String localVierClassName = UserManagerLocal.class.getName();            String remoteLookupStr = "ejb:" + appName + "/" + remoteModuleName + "/" + distinctName + "/" + beanName + "!" + remoteViewClassName;    out.println(remoteLookupStr +"<br>");    UserManagerRemote umr = (UserManagerRemote) context.lookup(remoteLookupStr);    //UserManagerRemote umr = (UserManagerRemote) context.lookup("java:global/EJB_03_web/UserManagerBean!com.manfred.session.UserManagerRemote");    User user1 = new User();    user1.setUsername("帅远");    umr.addUser(user1);    out.println("remote传值，user的id为：" + user1.getId());    %>    <br>    ===============================================    <br>        <%    String localLookupStr = "java:module/" + beanName + "!" + localVierClassName;    out.println(localLookupStr+"<br>");    UserManagerLocal uml = (UserManagerLocal) context.lookup(localLookupStr);    //UserManagerLocal uml = (UserManagerLocal) context.lookup("java:global/EJB_03_web/UserManagerBean!com.manfred.session.UserManagerLocal");    User user2 = new User();    user2.setUsername("帅远");    uml.addUser(user2);    out.println("local传址，user的id为：" + user2.getId());          %>  </body></html>

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