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摘要: Eclipse快速上手EJB -- 4. 多对多的单向关系的CMR(2)
UserManagementBean中有关 RoleBean 的部分(很简单)
</td></tr> <tr> <td style="BORDER-TOP-STYLE: none; BORDER-TOP-COLOR: rgb(236,233,216)" vAlign=top width="100%" bgColor=#edefd7>//********************************************************************** // 多对多的单向关系 //********************************************************************** /** * 创建权限 * Business method * @throws CreateException * @ejb.interface-method view-type = "remote" */ public void createRole(String roleName, String description) throws CreateException { roleHome.create(roleName, description); } /** * 显示所有权限 * @throws FinderException * @ejb.interface-method view-type="remote" */ public ArrayList getRoles() throws FinderException { ArrayList roleList = new ArrayList(30); Iterator iter = roleHome.findAll().iterator(); while (iter.hasNext()) { RoleLocal role = (RoleLocal) iter.next(); roleList.add(role.getName()); } return roleList; } /** * 删除权限 * @throws RemoveException * @throws EJBException * @ejb.interface-method view-type="remote" */ public void removeRole(String name) throws EJBException, RemoveException { roleHome.remove(name); } /** * 给用户增加权限 * @throws FinderException * @ejb.interface-method view-type="remote" */ public void addRole(String email, String roleName) throws FinderException { UserLocal user = userHome.findByPrimaryKey(email); Collection roles = user.getRoles(); RoleLocal role = roleHome.findByPrimaryKey(roleName); roles.add(role); } /** * 得到某个用户拥有的权限 * @throws FinderException * @ejb.interface-method view-type="remote" */ public ArrayList getUserRole(String email) throws FinderException{ ArrayList roleList = new ArrayList(30); UserLocal user = userHome.findByPrimaryKey(email); Iterator iter = user.getRoles().iterator(); while (iter.hasNext()) { RoleLocal role = (RoleLocal) iter.next(); roleList.add(role.getName()); } return roleList; }</td></tr></table>
CMPClient3.java
/* * 创建日期 2005-1-25 * * 作者:javamxj(分享java快乐) */ package javamxj.ejb.client; import java.rmi.RemoteException; import java.util.ArrayList; import java.util.Hashtable; import java.util.Iterator; import javamxj.ejb.cmp.UserManagement; import javax.ejb.CreateException; import javax.ejb.FinderException; import javax.naming.InitialContext; import javax.naming.NamingException; /** * @author pc * * TODO 要更改此生成的类型注释的模板,请转至 * 窗口 - 首选项 - Java - 代码样式 - 代码模板 */ public class CMPClient3 { private javamxj.ejb.cmp.UserManagementHome getHome() throws NamingException { return (javamxj.ejb.cmp.UserManagementHome) getContext().lookup( javamxj.ejb.cmp.UserManagementHome.JNDI_NAME); } private InitialContext getContext() throws NamingException { Hashtable props = new Hashtable(); props.put(InitialContext.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory"); props.put(InitialContext.PROVIDER_URL, "jnp://127.0.0.1:1099"); // This establishes the security for authorization/authentication // props.put(InitialContext.SECURITY_PRINCIPAL,"username"); // props.put(InitialContext.SECURITY_CREDENTIALS,"password"); InitialContext initialContext = new InitialContext(props); return initialContext; } public void testBean() { try { javamxj.ejb.cmp.UserManagement userMgmt = getHome().create(); createUsers(userMgmt); System.out.println("显示所有权限"); printList(userMgmt.getRoles()); System.out.println("给用户wangyi@aaa.com增加权限 "); userMgmt.addRole("wangyi@aaa.com", "manager"); userMgmt.addRole("wangyi@aaa.com", "user"); System.out.println("给用户javamxj增加权限 "); userMgmt.addRole("javamxj@yahoo.com.cn", "admin"); userMgmt.addRole("javamxj@yahoo.com.cn", "user"); System.out.println("显示javamxj拥有的权限"); printList(userMgmt.getUserRole("javamxj@yahoo.com.cn")); } catch (RemoteException e) { e.printStackTrace(); } catch (CreateException e) { e.printStackTrace(); } catch (NamingException e) { e.printStackTrace(); } catch (FinderException e) { e.printStackTrace(); } } // 创建用户 public static void createUsers(UserManagement userMgmt) throws RemoteException, CreateException { System.out.println("向Role表中添加数据"); userMgmt.createRole("admin", "系统管理员"); userMgmt.createRole("manager", "内容管理员"); userMgmt.createRole("user", "普通用户"); userMgmt.createRole("guest", "来宾用户"); } // 输出ArrayList private static void printList(ArrayList list) { Iterator i = list.iterator(); while (i.hasNext()) { Object details = (Object) i.next(); System.out.println(details.toString()); } System.out.println(""); } public static void main(String[] args) { CMPClient3 test = new CMPClient3(); test.testBean(); } }