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Jboss EJB 3.0 Stateless Beans Calculator.java // 计算器的接口：加、减 package org.jboss.tutorial.stateless.bean; public interface Calculator { int add(int x, int y); int subtract(int x, int y); } CalculatorBean.java package org.jboss.tutorial.stateless.bean; import javax.ejb.Stateless; @Stateless //标记CalculatorBean 为 stateless bean，为本地和远程接口的实现 public class CalculatorBean implements CalculatorRemote, CalculatorLocal { public int add(int x, int y) { return x + y; } public int subtract(int x, int y) { return x - y; } } CalculatorLocal.java package org.jboss.tutorial.stateless.bean; import javax.ejb.Local; @Local //标记为本地接口，继续了计算器接口 public interface CalculatorLocal extends Calculator { } CalculatorRemote.java package org.jboss.tutorial.stateless.bean; import javax.ejb.Remote; @Remote //标记为远程接口，继续了计算器接口 public interface CalculatorRemote extends Calculator { } 客户端 Client.java package org.jboss.tutorial.stateless.client; import org.jboss.tutorial.stateless.bean.Calculator; import org.jboss.tutorial.stateless.bean.CalculatorRemote; import javax.naming.InitialContext; public class Client { public static void main(String[] args) throws Exception { InitialContext ctx = new InitialContext(); //查找远程接口 Calculator calculator = (Calculator) ctx.lookup(CalculatorRemote.class.getName()); System.out.println("1 + 1 = " + calculator.add(1, 1)); System.out.println("1 - 1 = " + calculator.subtract(1, 1)); } } *****************************简化版******************************** 只需三个程序即可实现StatelessBean功能。 Calculator.java package org.jboss.tutorial.stateless.bean; import javax.ejb.Remote; @Remote //直接将计算器标记为远程接口 public interface Calculator { int add(int x, int y); int subtract(int x, int y); } CalculatorBean.java package org.jboss.tutorial.stateless.bean; import javax.ejb.Stateless; @Stateless public class CalculatorBean implements Calculator //这里实现了计算器接口 { public int add(int x, int y) { return x + y; } public int subtract(int x, int y) { return x - y; } } 客户端： Client.java package org.jboss.tutorial.stateless.client; import org.jboss.tutorial.stateless.bean.Calculator; import javax.naming.InitialContext; public class Client { public static void main(String[] args) throws Exception { InitialContext ctx = new InitialContext(); Calculator calculator = (Calculator) ctx.lookup(Calculator.class.getName()); //只要查找标记为remote的接口就行了 System.out.println("1 + 1 = " + calculator.add(1, 1)); System.out.println("1 - 1 = " + calculator.subtract(1, 1)); } } 这里附上log4j.properties 在jboss-EJB-3.0_Preview_5.zip 里面没有这个老是显示缺少appender log4j.properties log4j.appender.R=org.apache.log4j.RollingFileAppender log4j.appender.R.File=record.log log4j.appender.R.layout=org.apache.log4j.PatternLayout log4j.appender.R.layout.ConversionPattern=%p %d{hh:mm:ss} %t %c{1} -%m%n log4j.appender.R.MaxBackupIndex=1 log4j.appender.R.MaxFileSize=100KB log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) -%m%n log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.rootLogger=stdout,R 运行：参考installing.html Windows下 打开命令提示符cmd，到 jboss_home/bin Run.bat –c all 用ant 先build后run 就行了。 讨论： 简化版是看到jboss-EJB-3.0_Preview_5.zip里面的statefull源码而改写的，在EJB spe 3.0说似乎是删除了home这个接口，我觉得简化很多接口更方面，有效的开发j2ee application 返回类别: 教程 上一教程: 易混淆的几个JAVA术语（转贴） 下一教程: JAVA+ACCESS编程体会 您可以阅读与"Jboss EJB 3.0--Stateless Beans"相关的教程: · Jboss Ejb3.0 Interceptor · Jboss Ejb MDB · Jboss Ejb3.0 Statefull Bean · Jboss Ejb3.0 Entity Bean · Jboss EJB3.0 security |
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