开发第一个ejb2.0实体bean CMP

 下载oracle安装好后，按照http://hi.baidu.com/shirdrn/blog/item/b3795313fb3e52065baf5361.html中的方法，创建一个数据库。

用dba权限登录：sqlplus "sys/password as sysdba"

SQL> SELECT host_name, instance_name, version FROM v$instance ; 查看已有的数据库

C:/Documents and Settings/Administrator>set ORACLE_SID=dbname ；使用新建的数据库

 

查看当前运行的数据库

SQL> show parameter instnace_name
SQL> show parameter db_name

 

用管理员创建用户，并给该用户授权：
SQL> Create user username identified by password;

SQL> Grant all privileges to username ;

用该用户的登录数据库：sqlplus username/password@dbname

 

创建表customer(id,first_name,last_name)：

 

ok,准备工作完毕：

代码：

(顺便说说，weblogic8.1不支持10g，代码写完了准备部署才发现的，不过将就选了9i，还是部署通过了。)

 

package com.titan.customer; import java.rmi.RemoteException; import javax.ejb.EJBException; import javax.ejb.EntityBean; import javax.ejb.EntityContext; import javax.ejb.RemoveException; public abstract class CustomerBean implements EntityBean { public Integer ejbCreate(Integer id){ setId(id); return null; } public void ejbPostCreate(Integer id){} public abstract Integer getId(); public abstract void setId(Integer id); public abstract String getLastName(); public abstract void setLastName(String lname); public abstract String getFirstName(); public abstract void setFirstName(String fname); public void ejbActivate() throws EJBException, RemoteException {} public void ejbLoad() throws EJBException, RemoteException {} public void ejbPassivate() throws EJBException, RemoteException {} public void ejbRemove() throws RemoveException, EJBException,RemoteException {} public void ejbStore() throws EJBException, RemoteException {} public void setEntityContext(EntityContext arg0) throws EJBException,RemoteException {} public void unsetEntityContext() throws EJBException, RemoteException {} }

 

CreateException;

FinderException;不要写漏了。

package com.titan.customer; import java.rmi.RemoteException; import javax.ejb.EJBHome; public interface CustomerHomeRemote extends EJBHome { public CustomerRemote create(Integer id) throws RemoteException; public CustomerRemote findByPrimaryKey(Integer id) throws RemoteException; } package com.titan.customer; import java.rmi.RemoteException; import javax.ejb.EJBObject; public interface CustomerRemote extends EJBObject { public String getLastName() throws RemoteException; public void setLastName(String lnam) throws RemoteException; public String getFirstName() throws RemoteException; public void setFirstName(String fname) throws RemoteException; }

 

<?xml version="1.0"?> <!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> <enterprise-beans> <entity> <ejb-name>CustomerEJB</ejb-name> <home>com.titan.customer.CustomerHomeRemote</home> <remote>com.titan.customer.CustomerRemote</remote> <ejb-class>com.titan.customer.CustomerBean</ejb-class> <persistence-type>Container</persistence-type> <prim-key-class>java.lang.Integer</prim-key-class> <reentrant>False</reentrant> <cmp-version>2.x</cmp-version> <abstract-schema-name>Customer</abstract-schema-name> <cmp-field><field-name>id</field-name></cmp-field> <cmp-field><field-name>lastName</field-name></cmp-field> <cmp-field><field-name>firstName</field-name></cmp-field> <primkey-field>id</primkey-field> <security-identity><use-caller-identity/></security-identity> <resource-ref> <res-ref-name>jdbc/datasourcepool</res-ref-name> <res-type>javax.sql.DataSource</res-type> <res-auth>Container</res-auth> </resource-ref> </entity> </enterprise-beans> </ejb-jar>

 

部署到weblogic上：

部署出错，jdk换成1.4就解决了，看到有人出错是字符集的原因，有这种需求可以看看：

http://blog.youkuaiyun.com/yzsind/archive/2008/07/22/2692251.aspx

datasourcepool 是缓冲池的名字。

<?xml version="1.0"?> <!DOCTYPE weblogic-ejb-jar PUBLIC '-//BEA Systems, Inc.//DTD WebLogic 6.0.0 EJB//EN' 'http://www.bea.com/servers/wls600/dtd/weblogic-ejb-jar.dtd'> <weblogic-ejb-jar> <weblogic-enterprise-bean> <ejb-name>CustomerEJB</ejb-name> <entity-descriptor> <entity-cache> <max-beans-in-cache>100</max-beans-in-cache> </entity-cache> <persistence> <persistence-type> <type-identifier>WebLogic_CMP_RDBMS</type-identifier> <type-version>6.0</type-version> <type-storage>META-INF/weblogic-cmp-rdbms-jar.xml</type-storage> </persistence-type> <persistence-use> <type-identifier>WebLogic_CMP_RDBMS</type-identifier> <type-version>6.0</type-version> </persistence-use> </persistence> </entity-descriptor> <reference-descriptor> <resource-description> <res-ref-name>jdbc/datasourcepool</res-ref-name> <jndi-name>ds</jndi-name> </resource-description> </reference-descriptor> <jndi-name>CustomerHomeRemote</jndi-name> </weblogic-enterprise-bean> </weblogic-ejb-jar>

 

<data-source-name>ds</data-source-name>是jndi名字。

<!DOCTYPE weblogic-rdbms-jar PUBLIC '-//BEA Systems, Inc.//DTD WebLogic 6.0.0 EJB RDBMS Persistence//EN' 'http://www.bea.com/servers/wls600/dtd/weblogic-rdbms-persistence.dtd'> <weblogic-rdbms-jar> <weblogic-rdbms-bean> <ejb-name>CustomerEJB</ejb-name> <data-source-name>ds</data-source-name> <table-name>customer</table-name> <field-map> <cmp-field>id</cmp-field> <dbms-column>id</dbms-column> </field-map> <field-map> <cmp-field>lastName</cmp-field> <dbms-column>last_name</dbms-column> </field-map> <field-map> <cmp-field>firstName</cmp-field> <dbms-column>first_name</dbms-column> </field-map> </weblogic-rdbms-bean> </weblogic-rdbms-jar>

 

顺便贴下ant，我的myeclipse直接把META-INF和.class文件放到了classes文件下。

<?xml version="1.0" encoding="UTF-8"?> <project name="CMPTest" default="run" basedir="."> <property name="src" value="${basedir}/src"/> <property name="build" value="${basedir}/classes"/> <property name="dist" value="${basedir}/dist"/> <property name="CMPTest_jar" value="${dist}/CMPTest.jar"/> <property name="lib" value="${basedir}/lib"/> <path id="classpath"> <fileset dir="${lib}"> <include name="*.jar"/> </fileset> </path> <target name="init" depends="clean"> <mkdir dir="${dist}"/> </target> <target name="clean"> <delete file="${CMPTest_jar}"/> </target> <target name="compile" depends="init"> <javac srcdir="${src}" destdir="${build}"> <classpath refid="classpath"/> </javac> </target> <target name="build" depends="compile"> <jar jarfile="${CMPTest_jar}" basedir="${build}"/> </target> <target name="run" depends="build"> <java classname="com.test.client.Client" classpath="${CMPTest_jar}"/> </target> </project>

 

 

部署成功，写客户端测试一下：

package com.test.client; import java.rmi.RemoteException; import java.util.Hashtable; import java.util.Properties; import javax.ejb.CreateException; import javax.naming.Context; import javax.naming.InitialContext; import javax.naming.NamingException; import com.titan.customer.CustomerHomeRemote; import com.titan.customer.CustomerRemote; public class Client { public static void main(String[] args){ String url = "t3://localhost:7001"; Context initCtx = null; Hashtable env = new Hashtable(); // env.put(Context.INITIAL_CONTEXT_FACTORY,"com.apusic.jndi.InitialContextFactory"); env.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory"); env.put(Context.PROVIDER_URL, url); try { initCtx = new InitialContext(env); CustomerHomeRemote home = (CustomerHomeRemote) initCtx.lookup("CustomerHomeRemote"); CustomerRemote customer = home.create(new Integer(1)); customer.setFirstName("Lily"); customer.setLastName("Wang"); System.out.println("end"); } catch (NamingException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (RemoteException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (CreateException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

 

插入数据库成功～yeah 撒花～～