登录
当前位置： 首页 > 知识库问答 >
问题：

是否可以通过消息驱动bean调用安全EJB的方法？

麻学博
2023-03-14

当用户登录时，我需要在数据库中插入一条消息（主机名，仅作为示例）。因为它只是一个文本消息，所以将EJB注入到客户机（Servlets、JSP、JSF或其他东西）是非常不必要的。

这里提到的策略很管用。当EJB被强制执行安全约束时，问题就会出现。在这种情况下，它抛出一个关于安全性的异常。

消息驱动bean如下所示。

@MessageDriven(mappedName = "jms/destination", activationConfig = {
    @ActivationConfigProperty(propertyName = "acknowledgeMode", propertyValue = "Auto-acknowledge"),
    @ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Queue")
})
public class UserStatusMessageBean implements MessageListener
{
    @Resource
    private MessageDrivenContext messageDrivenContext;
    @EJB
    private UserStatusBeanRemote userStatusBeanRemote;

    public UserStatusMessageBean() {}

    @Override
    public void onMessage(Message message)
    {
        TextMessage textMessage;

        try
        {
            if(message instanceof TextMessage)
            {
                textMessage = (TextMessage) message;
                userStatusBeanRemote.addHost(textMessage.getText());
                //This EJB method causes the exception as given below.
            }
            else
            {
                System.out.println("Message is of wrong type : " +message.getClass().getName());
            }
        }
        catch (JMSException e)
        {
            messageDrivenContext.setRollbackOnly();
            System.out.println(e);
        }
        catch (Throwable e)
        {
            System.out.println(e);
        }
    }
}

到目前为止,无状态EJB只有一个方法负责使用JPA标准API将消息插入数据库：

@Stateless
@DeclareRoles(value={"ROLE_ADMIN", "ROLE_USER"})
@RolesAllowed(value={"ROLE_ADMIN"})
public class UserStatusBean implements UserStatusBeanRemote
{
    @Override
    public void addHost(String hostName)
    {
         //Business logic to add the host name to the database.
    }
}

@WebFilter(filterName = "SecurityCheck", urlPatterns = {"/jass/*"})
public final class SecurityCheck implements Filter
{
    @Resource(mappedName="jms/destinationFactory")
    private ConnectionFactory connectionFactory;
    @Resource(mappedName="jms/destination")
    private Queue queue;
    @EJB
    private final UserBeanLocal userService=null;

    public SecurityCheck() {}

    private void sendJMSMessageToDestination(String message) throws JMSException
    {
        Connection connection = null;
        Session session = null;

        try
        {
            connection = connectionFactory.createConnection();
            session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            MessageProducer messageProducer = session.createProducer(queue);
            TextMessage textMessage = session.createTextMessage();
            textMessage.setText(message);
            messageProducer.send(textMessage);
        }
        finally
        {
            if(session!=null){session.close();}
            if(connection!=null){connection.close();}
        }
    }

    private void doBeforeProcessing(ServletRequest request, ServletResponse response) throws IOException, ServletException
    {
        HttpServletRequest httpServletRequest=(HttpServletRequest)request;
        httpServletRequest.login(httpServletRequest.getParameter("userName"), httpServletRequest.getParameter("password"));
    }

    private void doAfterProcessing(ServletRequest request, ServletResponse response) throws IOException, ServletException, JMSException
    {
        HttpServletRequest httpServletRequest=(HttpServletRequest)request;
        HttpServletResponse httpServletResponse=(HttpServletResponse)response;
        ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
        Map<String, Object> sessionMap = externalContext.getSessionMap();

        if(httpServletRequest.isUserInRole("ROLE_USER"))
        {
            sendJMSMessageToDestination(httpServletRequest.getLocalName());//Send a text message through a message-driven bean.
            String userName = httpServletRequest.getParameter("userName");
            UserTable userTable = userService.setLastLogin(userName);
            userTable.setPassword(null);
            sessionMap.put("userName", userTable!=null?userTable.getFirstName():"Unknown");
            sessionMap.put("user", userTable);

            httpServletResponse.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
            httpServletResponse.setHeader("Pragma", "no-cache");
            httpServletResponse.setDateHeader("Expires", 0);
            httpServletResponse.sendRedirect("../user_side/Home.jsf");
        }
        else if(httpServletRequest.isUserInRole("ROLE_ADMIN"))
        {
            sendJMSMessageToDestination(httpServletRequest.getLocalName());//Send a text message through a message-driven bean.

            String userName = httpServletRequest.getParameter("userName");
            UserTable userTable = userService.setLastLogin(userName);
            userTable.setPassword(null);
            sessionMap.put("adminName", userTable!=null?userTable.getFirstName():"Unknown");
            sessionMap.put("user", userTable);

            httpServletResponse.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
            httpServletResponse.setHeader("Pragma", "no-cache");
            httpServletResponse.setDateHeader("Expires", 0);
            httpServletResponse.sendRedirect("../admin_side/Home.jsf");
        }
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
    {
        try
        {
            doBeforeProcessing(request, response);
        }
        catch (Exception e)
        {
            HttpServletResponse httpServletResponse=(HttpServletResponse)response;
            //FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, "Error", "Incorrect user name and/or password. Access denied."));
            httpServletResponse.sendRedirect("../utility/Login.jsf");
            return;
        }

        chain.doFilter(request, response);

        try
        {
            doAfterProcessing(request, response);
        }
        catch (JMSException ex)
        {
            Logger.getLogger(SecurityCheck.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    //The rest of this filter.
}

WARNING: EJB5184:A system exception occurred during an invocation on EJB UserStatusBean, method: public void ejb.message.UserStatusBean.addHost(java.lang.String)
WARNING: javax.ejb.AccessLocalException: Client not authorized for this invocation
    at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer.java:1895)
    at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:204)
    at com.sun.ejb.containers.EJBObjectInvocationHandlerDelegate.invoke(EJBObjectInvocationHandlerDelegate.java:79)
    at $Proxy366.addHost(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:239)
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:150)
    at com.sun.corba.ee.impl.presentation.rmi.codegen.CodegenStubBase.invoke(CodegenStubBase.java:226)
    at ejb.message.__UserStatusBeanRemote_Remote_DynamicStub.addHost(ejb/message/__UserStatusBeanRemote_Remote_DynamicStub.java)
    at ejb.message._UserStatusBeanRemote_Wrapper.addHost(ejb/message/_UserStatusBeanRemote_Wrapper.java)
    at bean.message.UserStatusMessageBean.onMessage(UserStatusMessageBean.java:37)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081)
    at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153)
    at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4695)
    at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:630)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582)
    at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:55)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369)
    at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4667)
    at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4655)
    at org.glassfish.ejb.mdb.MessageBeanContainer.deliverMessage(MessageBeanContainer.java:1219)
    at org.glassfish.ejb.mdb.MessageBeanListenerImpl.deliverMessage(MessageBeanListenerImpl.java:81)
    at com.sun.enterprise.connectors.inbound.MessageEndpointInvocationHandler.invoke(MessageEndpointInvocationHandler.java:171)
    at $Proxy406.onMessage(Unknown Source)
    at com.sun.messaging.jms.ra.OnMessageRunner.run(OnMessageRunner.java:283)
    at com.sun.enterprise.connectors.work.OneWork.doWork(OneWork.java:107)
    at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:497)
    at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:540)

INFO:   javax.ejb.EJBAccessException
    at ejb.message._UserStatusBeanRemote_Wrapper.addHost(ejb/message/_UserStatusBeanRemote_Wrapper.java)
    at bean.message.UserStatusMessageBean.onMessage(UserStatusMessageBean.java:37)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081)
    at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153)
    at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4695)
    at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:630)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582)
    at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:55)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369)
    at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4667)
    at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4655)
    at org.glassfish.ejb.mdb.MessageBeanContainer.deliverMessage(MessageBeanContainer.java:1219)
    at org.glassfish.ejb.mdb.MessageBeanListenerImpl.deliverMessage(MessageBeanListenerImpl.java:81)
    at com.sun.enterprise.connectors.inbound.MessageEndpointInvocationHandler.invoke(MessageEndpointInvocationHandler.java:171)
    at $Proxy406.onMessage(Unknown Source)
    at com.sun.messaging.jms.ra.OnMessageRunner.run(OnMessageRunner.java:283)
    at com.sun.enterprise.connectors.work.OneWork.doWork(OneWork.java:107)
    at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:497)
    at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:540)
Caused by: java.rmi.AccessException: CORBA NO_PERMISSION 9998 Maybe; nested exception is: 
    org.omg.CORBA.NO_PERMISSION:   vmcid: 0x2000  minor code: 1806 completed: Maybe
    at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.mapSystemException(Util.java:264)
    at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.wrapException(Util.java:695)
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:249)
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:150)
    at com.sun.corba.ee.impl.presentation.rmi.codegen.CodegenStubBase.invoke(CodegenStubBase.java:226)
    at ejb.message.__UserStatusBeanRemote_Remote_DynamicStub.addHost(ejb/message/__UserStatusBeanRemote_Remote_DynamicStub.java)
    ... 30 more
Caused by: org.omg.CORBA.NO_PERMISSION:   vmcid: 0x2000  minor code: 1806 completed: Maybe
Caused by: javax.ejb.AccessLocalException: Client not authorized for this invocation
    at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer.java:1895)
    at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:204)
    at com.sun.ejb.containers.EJBObjectInvocationHandlerDelegate.invoke(EJBObjectInvocationHandlerDelegate.java:79)
    at $Proxy366.addHost(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:239)
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:150)
    at com.sun.corba.ee.impl.presentation.rmi.codegen.CodegenStubBase.invoke(CodegenStubBase.java:226)
    at ejb.message.__UserStatusBeanRemote_Remote_DynamicStub.addHost(ejb/message/__UserStatusBeanRemote_Remote_DynamicStub.java)
    at ejb.message._UserStatusBeanRemote_Wrapper.addHost(ejb/message/_UserStatusBeanRemote_Wrapper.java)
    at bean.message.UserStatusMessageBean.onMessage(UserStatusMessageBean.java:37)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081)
    at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153)
    at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4695)
    at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:630)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582)
    at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:55)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369)
    at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4667)
    at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4655)
    at org.glassfish.ejb.mdb.MessageBeanContainer.deliverMessage(MessageBeanContainer.java:1219)
    at org.glassfish.ejb.mdb.MessageBeanListenerImpl.deliverMessage(MessageBeanListenerImpl.java:81)
    at com.sun.enterprise.connectors.inbound.MessageEndpointInvocationHandler.invoke(MessageEndpointInvocationHandler.java:171)
    at $Proxy406.onMessage(Unknown Source)
    at com.sun.messaging.jms.ra.OnMessageRunner.run(OnMessageRunner.java:283)
    at com.sun.enterprise.connectors.work.OneWork.doWork(OneWork.java:107)
    at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:497)
    at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:540)

是否可以通过消息驱动的bean调用这样的方法？

我用的是GlassFish 4.0。

共有1个答案

昝存
2023-03-14

您可以对MDB使用@runas注释。

EJB规范规定：

Bean提供程序可以使用RunAs元数据注释，或者Bean提供程序或应用程序汇编程序可以使用run-as部署描述符元素为部署描述符中的企业Bean定义run-as标识。run-as标识应用于企业bean作为一个整体，即应用于企业bean的业务、主接口和组件接口、无接口视图和/或web服务endpoint的所有方法；消息驱动bean的消息侦听器方法；和企业bean的超时回调方法；以及它们可能反过来调用的bean的所有内部方法。

在这种情况下，调用方主体传播并不重要。谁调用了该方法以及标识是否被传播并不相关，将使用run-as标识，并将进一步传播该标识。

不过，必须正确设置run-as标识。基本上，如果使用默认主体到角色映射，则需要创建一个用户，例如runasadmin，并为他分配role_admin角色。然后用@runas（“runasadmin”）注释MDB。

 类似资料：
  • JBoss消息驱动Bean，未调用onMessage

    在一个无状态bean中，我正在查找队列，这是正确的，并且发送没有抛出异常： 但不调用消息驱动bean的onMessage方法。 我错过了什么？ 我的消息驱动bean有以下代码：

  • 消息驱动bean是否需要激活规范？

    [警告]:由于激活规范不可用，因此无法激活消息驱动bean的消息endpoint。在激活规范可用之前，消息endpoint将不会接收消息。 MDB必须有激活规范吗？我希望它只是被激活，而不需要添加进一步的配置到服务器。

  • 在Glassfish中不调用消息驱动Bean onMessage（）

    我对JMS编码是新手。我试图从独立的java客户端创建消息，该客户端创建并将消息发送到队列，消息驱动bean用于进一步处理消息。 我使用的是Glassfish应用服务器（3.1）。并设置从独立java客户机创建消息的所有内容。 下面是我的代码：客户端 消息驱动bean： 问题是:没有被调用。我错过什么了吗？请帮帮我.

  • TomEE MDB消息驱动Bean

    是否可以在MDB（消息驱动Bean）中为“目的地”动态分配运行时值？ 我还尝试了ejb-jar.xml方法，但是“activation-config-property-name”=“destination”的值被理解为队列的文字物理名称。因此我无法对资源进行JNDI查找。 从属性读取和分配目标或使用-d参数传递值的正确方法是什么？

  • 注入消息驱动Bean

    在企业应用程序中，我试图使用netBeans 8.1将MessageDriven beans注入Web应用程序（到REST服务）。我在IDE中没有得到任何警告，但是，在部署时，我得到以下错误： 严重：加载应用程序时出现异常：CDI部署失败：Weld-001408:未满足类型StatisticsBean的依赖关系，其限定符@Default在注入点[BackedAnnotatedField]@Inje

  • 消息驱动的 Bean（Message Driven Beans）

    消息驱动Bean是一种企业bean，当EJB容器从队列或主题接收消息时由EJB容器调用。 消息驱动的bean是一个无状态bean，用于异步执行任务。 为了演示消息驱动bean的使用，我们将使用EJB-persistence章节，我们需要执行以下任务 - Step 1 - 在数据库中创建表（请参阅EJB-Persistence章节）。 Step 2 - 创建与表对应的实体类（请参阅EJB-Persi

相关问答

注入消息驱动BeanSpring是否以线程安全的方式发布bean？是否可以通过调用方法来添加数组元素？消息驱动Bean读取两次相同的消息是否可以通过Firebase Cloud Messaging(FCM)向离线用户发送消息？

相关文章

查找是否通过tcp传递了消息是否可以将Go的缓冲通道用作线程安全队列？Kafa consumer 是否可以消费指定分区消息？是否可以获取有关Golang中调用方函数的信息？是否可以用Java编写设备驱动程序？

相关阅读

RabbitMQ是如何收发消息的？RocketMQ 不丢失消息的方式消息队列 RabbitMQ的介绍及安装我的秋招安全之路：度小满-信息安全工程师-oc美团信息安全部凉面

相关工具

DB2的Ruby语言驱动通用信息系统框架Intel显卡的Linux驱动程序文件安全卫士Alsa声卡驱动 for Linux

相关文档

安卓应用安全指南PHP 安全基础Python 安全编程iOS Security 安全 WikiiOS 安全攻防
快捷导航： 新手教程 算法原理 架构设计 Java进阶 数据库进阶 大厂专栏 面试经验 编程笔记 编程问答 所有专题 文档资料 工具软件 电子书籍 小牛导航
在线工具： 房贷计算器 个税计算器 Linux命令查询 Json格式化 正则表达式 颜色转换 AES加解密 SHA1加密 MD5加密 毒鸡汤 字数统计 随机密码生成 进制转换 Base64编解码 励志句子
Copyright © 2019-2024 小牛知识库@xnip.cn. All Rights Reserved.