Hibernate Spring Struts2 它们的拦截器

Hibernate拦截

@Component("entityInterceptor")
public class EntityInterceptor extends EmptyInterceptor {

	private static final long serialVersionUID = 7319416231145791577L;
	
	// 保存回调方法  保存时更新时间
	@Override
	public boolean onSave(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types) {
		if (entity instanceof BaseEntity) {
			for (int i = 0; i < propertyNames.length; i++) {
				if (BaseEntity.CREATE_DATE_PROPERTY_NAME.equals(propertyNames[i]) || BaseEntity.MODIFY_DATE_PROPERTY_NAME.equals(propertyNames[i])) {
					state[i] = new Date();
				}
			}
			ReflectionUtil.invokeSetterMethod(entity, BaseEntity.CREATE_DATE_PROPERTY_NAME, new Date()); //反射调用
		}
		return true;
	}

	/**
	 * 调用Setter方法
	 * 
	 * @param object
	 *            对象
	 *            
	 * @param propertyName
	 *            属性名称
	 *            
	 * @param propertyValue
	 *            属性值
	 */
	public static void invokeSetterMethod(Object object, String propertyName, Object propertyValue) {
		Class<?> setterMethodClass = propertyValue.getClass();
		invokeSetterMethod(object, propertyName, propertyValue, setterMethodClass);
	}

	
	/**
	 * 调用Setter方法
	 * 
	 * @param object
	 *            对象
	 *            
	 * @param propertyName
	 *            属性名称
	 *            
	 * @param propertyValue
	 *            属性值
	 *            
	 * @param setterMethodClass
	 *            参数类型
	 */
	public static void invokeSetterMethod(Object object, String propertyName, Object propertyValue, Class<?> setterMethodClass) {
		String setterMethodName = "set" + StringUtils.capitalize(propertyName);
		try {
			Method setterMethod = object.getClass().getMethod(setterMethodName, setterMethodClass);
			setterMethod.invoke(object, propertyValue);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

　　Sturs2拦截

public class LogInterceptor extends AbstractInterceptor {

	private static final long serialVersionUID = 276741467699160227L;

	@Resource(name = "logServiceImpl")
	private LogService logService;
	@Resource(name = "adminServiceImpl")
	private AdminService adminService;

	@Override
	public String intercept(ActionInvocation invocation) throws Exception {
		String result = invocation.invoke();
		
		Object action = invocation.getAction();
		String actionClass = action.getClass().getName();
		String actionMethod = invocation.getProxy().getMethod();
		
		if (action instanceof BaseAdminAction) {
			if (!StringUtils.equals(result, BaseAdminAction.ERROR)) {
				List<LogConfig> allLogConfigList = LogConfigUtil.getAllLogConfigList();
				if (allLogConfigList != null) {
					for (LogConfig logConfig : allLogConfigList) {
						if (StringUtils.equals(logConfig.getActionClass(), actionClass) && StringUtils.equals(logConfig.getActionMethod(), actionMethod)) {
							BaseAdminAction baseAdminAction = (BaseAdminAction) action;
							HttpServletRequest request= ServletActionContext.getRequest();
							
							String logInfo = baseAdminAction.getLogInfo();
							String operator = adminService.getLoginAdmin().getUsername();
							if(operator == null) {
								operator = "未知";
							}
							String ip = request.getRemoteAddr();
							String operation = logConfig.getOperation();
							
							Log log = new Log();
							log.setOperation(operation);
							log.setOperator(operator);
							log.setActionClass(actionClass);
							log.setActionMethod(actionMethod);
							log.setIp(ip);
							log.setInfo(logInfo);
							logService.save(log);
							break;
						}
					}
				}
			}
		}
		return null;
	}

或者

public class MemberVerifyInterceptor extends MethodFilterInterceptor {

	private static final long serialVersionUID = -86246303854807787L;
	
	@Override
	public String doIntercept(ActionInvocation actionInvocation) throws Exception {
		String loginMemberId = (String) actionInvocation.getInvocationContext().getSession().get(Member.MEMBER_ID_SESSION_NAME);
		if (loginMemberId == null) {
			HttpServletRequest request = ServletActionContext.getRequest();
			String loginRedirectUrl = request.getServletPath();
			String queryString = request.getQueryString();
			if (StringUtils.isNotEmpty(queryString)) {
				loginRedirectUrl += "?" + queryString;
			}
			
			OgnlValueStack ognlValueStack = (OgnlValueStack)request.getAttribute("struts.valueStack");
			ognlValueStack.set("loginRedirectUrl", loginRedirectUrl);
			return "login";
		}
		return actionInvocation.invoke();
	}

　　

　　Spring拦截

@Component("adminSecurityListener")
public class AdminSecurityListener implements ApplicationListener {

	@Resource(name = "adminServiceImpl")
	private AdminService adminService;

	public void onApplicationEvent(ApplicationEvent applicationEvent) {
		// 登录成功：记录登录IP、清除登录失败次数
		if (applicationEvent instanceof AuthenticationSuccessEvent) {
			AuthenticationSuccessEvent authenticationSuccessEvent = (AuthenticationSuccessEvent) applicationEvent;
			Authentication authentication = (Authentication) authenticationSuccessEvent.getSource();
			String loginIp = ((WebAuthenticationDetails)authentication.getDetails()).getRemoteAddress();
			Admin admin = (Admin) authentication.getPrincipal();
			admin.setLoginIp(loginIp);
			admin.setLoginDate(new Date());
			Setting setting = SettingUtil.getSetting();
			if (setting.getIsLoginFailureLock() == false) {
				return;
			}
			admin.setLoginFailureCount(0);
			adminService.update(admin);
		}

		// 登录失败：增加登录失败次数
		if (applicationEvent instanceof AuthenticationFailureBadCredentialsEvent) {
			AuthenticationFailureBadCredentialsEvent authenticationFailureBadCredentialsEvent = (AuthenticationFailureBadCredentialsEvent) applicationEvent;
			Authentication authentication = (Authentication) authenticationFailureBadCredentialsEvent.getSource();
			String loginUsername = authentication.getName();
			Setting setting = SettingUtil.getSetting();
			if (setting.getIsLoginFailureLock() == false) {
				return;
			}
			Admin admin = adminService.getAdminByUsername(loginUsername);
			if (admin != null) {
				int loginFailureCount = admin.getLoginFailureCount() + 1;
				if (loginFailureCount >= setting.getLoginFailureLockCount()) {
					admin.setIsAccountLocked(true);
					admin.setLockedDate(new Date());
				}
				admin.setLoginFailureCount(loginFailureCount);
				adminService.update(admin);
			}
		}
	}

}

　　上述只是框架中的一小部分功能，总结它们的特点是:

　　 struts2 适合会员是否登录、请求参数等处理 多与前台打交道

　　spring   需要操作数据库，并且不用返回给用户消息，逻辑处理情景下用

      hibernate 操作实体类（表）时的场景用，其与spring拦截相似，hibernate还有给表自动命名的策略