EJB3 第一篇

很久没有看EJB3了，今天有空弄了个HelloWorld来耍耍，熟悉熟悉，加深些印象。

首先弄好环境，Eclipse JBOSS配置好环境变量。

接着就是code啦：

接口：HelloWorld.java

package org.eimhe.ejb3;
public interface HelloWorld {
	public String SayHello(String name);
}

实现接口：HelloWorldBean.java

package org.eimhe.ejb3;
import javax.ejb.Remote;
import javax.ejb.Stateless;
@Stateless
@Remote({HelloWorld.class})
public class HelloWorldBean implements HelloWorld{
	public String SayHello(String name)
	{
		return name +"说：你好！世界，这是我的第一个EJB";
	}
}

创建个build.xml，使用ant来打包发布

<?xml version="1.0"?>
<project name="HelloWorld" default="ejbjar" basedir=".">
	<property environment="env"/>
	<property name="src.dir" value="${basedir}/src"/>
	<property name="jboss.home" value="${env.JBOSS_HOME}"/>
	<property name="build.dir" value="${basedir}/build"/>
	<property name="build.classes.dir" value="${build.dir}/classes"/>
	
	<!-- Build classpath -->
	<path id="build.classpath">
		<fileset dir="${jboss.home}/client">
			<include name="*.jar"/>
		</fileset>
		<pathelement location="${build.classes.dir}"/>
	</path>
	
	<target name="prepare" depends="clean">
		<mkdir dir="${build.dir}"/>
		<mkdir dir="${build.classes.dir}"/>
	</target>
	
	<target name="compile" depends="prepare" description="编译">
		<javac srcdir="${src.dir}" destdir="${build.classes.dir}" debug="on" deprecation="on" optimize="off" includes="**">
			<classpath refid="build.classpath"/>
		</javac>
	</target>
	
	<target name="ejbjar" depends="compile" description="创建EJB发布包">
		<jar jarfile="${basedir}/HelloWorld.jar">
			<fileset dir="${build.classes.dir}">
				<include name="org/**/*.class"/>
			</fileset>
		</jar>
	</target>
	
	<target name="deploy" depends="ejbjar" description="f发布EJB">
		<copy file="${basedir}/HelloWorld.jar" todir="${jboss.home}\server\default\deploy\"/>
	</target>
	
	<target name="clean">
		<delete dir="${jboss.home}\server\default\deploy\HelloWorld.jar"/>
	</target>
</project>

部署成功：

23:32:16,542 INFO [JBossASKernel] Created KernelDeployment for: HelloWorld.jar
23:32:16,589 INFO [JBossASKernel] installing bean: jboss.j2ee:jar=HelloWorld.jar,name=HelloWorldBean,service=EJB3

哈哈，来个junit测试下：HelloWorldTest.java

package junit.test;
import static org.junit.Assert.*;
import java.util.Properties;
import javax.naming.InitialContext;
import org.eimhe.ejb3.HelloWorld;
import org.junit.BeforeClass;
import org.junit.Test;
public class HelloWorldTest {
	protected static HelloWorld helloWorld;
	
	@BeforeClass
	public static void setUpBeforeClass() throws Exception
	{
		Properties props = new Properties();
		props.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
        props.setProperty("java.naming.provider.url", "localhost:1099");
		InitialContext ctx = new InitialContext(props);
		helloWorld = (HelloWorld) ctx.lookup("HelloWorldBean/remote");
	}
	
	@Test
	public void testSayHello()
	{
		String result = helloWorld.SayHello("test");
		System.out.println("result : "+result);
		assertEquals("test说：你好！世界，这是我的第一个EJB", result);
	}
}

第一个程序完成。