小编sta*_*ion的帖子

我想使用Python在Windows环境中自动执行桌面活动.怎么做？一些例子也会有所帮助.

通过桌面活动,我指的是诸如控制鼠标和键盘,访问活动窗口属性,双击桌面上的图标,最小化和最大化窗口,通过键盘将数据输入到输入弹出窗口等操作.

在我的代码中使portletRequest会话无效后,我收到以下异常

Aug 27, 2013 7:07:13 AM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: Servlet.service() for servlet xyzapplication Servlet threw exception java.lang.IllegalStateException: getAttribute: Session already invalidated
    at org.apache.catalina.session.StandardSession.getAttribute(StandardSession.java:1165)
    at org.apache.catalina.session.StandardSessionFacade.getAttribute(StandardSessionFacade.java:122)
    at com.liferay.portal.servlet.SharedSessionWrapper.getAttribute(SharedSessionWrapper.java:75)
    at com.liferay.portlet.PortletSessionImpl.getAttribute(PortletSessionImpl.java:55)
    at org.springframework.web.portlet.context.PortletRequestAttributes.updateAccessedSessionAttributes(PortletRequestAttributes.java:256)
    at org.springframework.web.context.request.AbstractRequestAttributes.requestCompleted(AbstractRequestAttributes.java:48)
    at org.springframework.web.portlet.FrameworkPortlet.processRequest(FrameworkPortlet.java:552)
    at org.springframework.web.portlet.FrameworkPortlet.processAction(FrameworkPortlet.java:460)
    at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:70)
    at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:48)
    at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:111)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:72)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:73)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
    at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:593)
    at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:530)
    at com.liferay.portlet.InvokerPortletImpl.invoke(InvokerPortletImpl.java:534)
    at com.liferay.portlet.InvokerPortletImpl.invokeAction(InvokerPortletImpl.java:579)
    at com.liferay.portlet.InvokerPortletImpl.processAction(InvokerPortletImpl.java:294)
    at com.liferay.portal.action.LayoutAction.processPortletRequest(LayoutAction.java:944)
    at com.liferay.portal.action.LayoutAction.processLayout(LayoutAction.java:688)
    at com.liferay.portal.action.LayoutAction.execute(LayoutAction.java:249)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
    at …

UML图可以用于建模数据库设计和类设计,但ER图应该专门用于数据库问题.你如何选择一个图形表示而不是另一个？

我正在研究一个项目,其中我需要比较两个图像.任何人都可以帮我一个方法来做到这一点.通过图像的方式是一个软件的截图.我想检查两个图像是否相同,包括图像中显示的数字和字母(软件的屏幕截图).

我正在使用springs源工具套件。我在weblogic.xml文件中遇到错误-

cvc-complex-type.2.4.a: Invalid content was found starting with element 'prefer-   
application-packages'. One of '{"http://www.bea.com/ns/weblogic/weblogic-web-app":retain-
original-url, "http://www.bea.com/ns/weblogic/weblogic-web-app":show-archived-real-path-
enabled, "http://www.bea.com/ns/weblogic/weblogic-web-app":require-admin-traffic,    
"http://www.bea.com/ns/weblogic/weblogic-web-app":access-logging-disabled}' is expected.
enter code here

我的weblogic.xml看起来像这样

<?xml version="1.0"?>
<weblogic-web-app xmlns="http://www.bea.com/ns/weblogic/weblogic-web-app"     
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://www.bea.com/ns/weblogic/weblogic-web-app   
http://www.bea.com/ns/weblogic/weblogic-web-app/1.0/weblogic-web-app.xsd">
<jsp-descriptor>
    <keepgenerated>true</keepgenerated>
    <page-check-seconds>60</page-check-seconds>
    <precompile>true</precompile>
    <precompile-continue>true</precompile-continue>
</jsp-descriptor>
<container-descriptor>
    <optimistic-serialization>true</optimistic-serialization>
    <prefer-application-packages>
        <package-name>antlr.*</package-name>
        <package-name>javax.persistence.*</package-name>
        <package-name>org.apache.commons.*</package-name>  
    </prefer-application-packages>
    <show-archived-real-path-enabled>true</show-archived-real-path-enabled>
</container-descriptor>

</weblogic-web-app>

错误显示在标签的开头。

我在Eclipse中安装了Lombok插件.很多天以来它一直运作良好.突然之间,我经常在我的Eclipse中获得一个弹出窗口,其中包含以下详细信息:

An error has occurred. See error log for more details.
lombok/launch/PatchFixesHider$PatchFixes


An internal error occurred during: "Requesting Java AST from selection".
lombok/launch/PatchFixesHider$PatchFixes

Eclipse错误日志包含:

!ENTRY org.eclipse.ui.workbench 4 2 2016-08-29 13:18:38.631
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.ui.workbench".
!STACK 0
java.lang.LinkageError: lombok/launch/PatchFixesHider$PatchFixes
    at org.eclipse.jdt.internal.ui.search.OccurrencesFinder.addUsage(OccurrencesFinder.java)
    at org.eclipse.jdt.internal.ui.search.OccurrencesFinder.visit(OccurrencesFinder.java:158)
    at org.eclipse.jdt.core.dom.QualifiedName.accept0(QualifiedName.java:168)
    at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2711)
    at org.eclipse.jdt.core.dom.ASTNode.acceptChild(ASTNode.java:2759)
    at org.eclipse.jdt.core.dom.PackageDeclaration.accept0(PackageDeclaration.java:225)
    at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2711)
    at org.eclipse.jdt.core.dom.ASTNode.acceptChild(ASTNode.java:2759)

Eclipse版本:

Eclipse Java EE IDE for Web Developers.

Version: Neon Release (4.6.0)
Build id: 20160613-1800

这个弹出窗口频繁发生,非常烦人.有谁知道解决这个问题的解决方案？

我有一个与mongo db集成的java应用程序.我碰巧有3个mongo db主机(都有相同的端口),并且必须使用除我的应用程序使用的db之外的单独数据库进行身份验证.例如:"admin"是身份验证数据库名称,"contenttest"是我的应用程序要连接的db.我也有凭据(用户名和密码).我尝试使用以下uri进行连接,但它在spring boot应用程序中无效.

application.properties

spring.data.mongodb.authentication-database=admin
spring.data.mongodb.uri = mongodb://content_rw:<secret password>@a.mongo.db:27017,b.mongo.db:27017,c.mongo.db:27017/contenttest?wtimeoutMS=300&connectTimeoutMS=500&socketTimeoutMS=200

我收到错误,说明以下错误日志的身份验证失败.

com.mongodb.MongoSecurityException: Exception authenticating MongoCredential{mechanism=null, userName='content_rw', source='contenttest', password=<hidden>, mechanismProperties={}}
    at com.mongodb.connection.SaslAuthenticator.wrapInMongoSecurityException(SaslAuthenticator.java:157) ~[mongodb-driver-core-3.4.3.jar!/:na]
    at com.mongodb.connection.SaslAuthenticator.access$200(SaslAuthenticator.java:37) ~[mongodb-driver-core-3.4.3.jar!/:na]
    at com.mongodb.connection.SaslAuthenticator$1.run(SaslAuthenticator.java:66) ~[mongodb-driver-core-3.4.3.jar!/:na]
    at com.mongodb.connection.SaslAuthenticator$1.run(SaslAuthenticator.java:44) ~[mongodb-driver-core-3.4.3.jar!/:na]
    at com.mongodb.connection.SaslAuthenticator.doAsSubject(SaslAuthenticator.java:162) ~[mongodb-driver-core-3.4.3.jar!/:na]
    at com.mongodb.connection.SaslAuthenticator.authenticate(SaslAuthenticator.java:44) ~[mongodb-driver-core-3.4.3.jar!/:na]
    at com.mongodb.connection.DefaultAuthenticator.authenticate(DefaultAuthenticator.java:32) ~[mongodb-driver-core-3.4.3.jar!/:na]
    at com.mongodb.connection.InternalStreamConnectionInitializer.authenticateAll(InternalStreamConnectionInitializer.java:109) ~[mongodb-driver-core-3.4.3.jar!/:na]
    at com.mongodb.connection.InternalStreamConnectionInitializer.initialize(InternalStreamConnectionInitializer.java:46) ~[mongodb-driver-core-3.4.3.jar!/:na]
    at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:116) ~[mongodb-driver-core-3.4.3.jar!/:na]
    at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:113) ~[mongodb-driver-core-3.4.3.jar!/:na]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_151]
Caused by: com.mongodb.MongoCommandException: Command failed with error 18: 'Authentication failed.' on server a.mongo.db:27017. The full response is { "ok" : 0.0, "code" : 18, "errmsg" …

我正在使用带有 Mockito 框架的 spring-boot 测试来测试我的应用程序。存储库类之一 EntityManager 作为参考。

我的班级如下所示。

    @Repository
    @Transactional
    @Slf4j
    public class SomeRepositoryService {

        @PersistenceContext
        private EntityManager entityManager;

        public List<Run> findBySearchCriteria(String searchCriteria,Integer 
 offset,Integer limit,Integer userId) {
        //code 
       }
    }

测试类看起来像：

@RunWith(SpringRunner.class)
@SpringBootTest
public class RunRepositoryServiceTests {

    @MockBean
    EntityManager entityManager; 


    @Autowired
    private RunRepositoryService runRepositoryService;

    @Test
    public void testFindBySearchCriteria() {
//code to test
    }
}

当我运行这个时，我得到

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.jpa.repository.support.DefaultJpaContext]: Constructor threw exception; nested exception is java.lang.NullPointerException

    Caused by: java.lang.NullPointerException: null
        at org.springframework.data.jpa.repository.support.DefaultJpaContext.<init>(DefaultJpaContext.java:53) ~[spring-data-jpa-2.0.9.RELEASE.jar:2.0.9.RELEASE]

谁能让我知道如何测试或解决这个问题？

我使用Python的的paramiko包来连接到远程Unix机器.我写了这段代码:

import paramiko
import sys
import os
import os.path
passwd = "XXX"
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect("173.15.13.28", "root", password=passwd)
stdin, stdout, stderr = ssh.exec_command('ls')
x = stdout.readlines()
print x
for line in x:
   print line
ssh.close()

执行后我收到此错误:

   Traceback (most recent call last):
    File "<pyshell#9>", line 1, in <module>
      ssh.connect("173.15.13.28", "root", password="--------")
    File "C:\Python27\lib\site-packages\paramiko\client.py", line 282, in connect
      for (family, socktype, proto, canonname, sockaddr) in socket.getaddrinfo(hostname, port,socket.AF_UNSPEC, socket.SOCK_STREAM):
    gaierror: [Errno 10109] getaddrinfo failed

我不知道问题是什么.

我正在将一个excel(xls)文件上传到s3,然后另一个应用程序应该从s3下载该文件并使用Apache POI阅读器进行解析.读者接受inputstream类型作为输入,但要正确解析它所期望的excel PushbackInputStream.我从s3下载的文件中获得的输入流是类型的S3ObjectInputStream.我如何转换S3ObjectInputStream为PushbackInputStream？

我尝试直接传递S3ObjectInputStream(因为这是一个inputStream)PushbackInputStream,但它导致以下异常:

org.springframework.batch.item.ItemStreamException: Failed to initialize the reader
    at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.open(AbstractItemCountingItemStreamItemReader.java:147)
    at org.springframework.batch.item.support.CompositeItemStream.open(CompositeItemStream.java:96)
.....
.....
Caused by: java.lang.IllegalStateException: InputStream MUST either support mark/reset, or be wrapped as a PushbackInputStream
at org.springframework.batch.item.excel.poi.PoiItemReader.openExcelFile(PoiItemReader.java:82)
.....

我尝试将S3ObjectInputStream转换为PushbackInputStream,但它导致了classcastexception.

java.lang.ClassCastException: com.amazonaws.services.s3.model.S3ObjectInputStream cannot be cast to java.io.PushbackInputStream

任何人都知道解决方案