teleconference solutions

The first-level index of HBase is Rowkey, and we can only retrieve it through Rowkey. If we make some combination queries relative to the column columns of hbase, we need to use HBase's two-level indexing scheme for multi-condition queries. HBase Some solutions for building two-level indexes //------------------------------------------------------------------- The common two-level indexing scheme has the following types: 1.MapReduce Solution 2.ITH

After the Java project was packaged with EXE4J, the results of the other computer operations appearedJava.lang.UnsatisfiedLinkError:no in Java.library.path's error, just beginning to think that the jar package is not in the Classpath path, later found that Java.library.path and classpath are two different variables, the latter is the class path we know, and the jar package, which is related to the DLL, which specifies DLL file search path.In my project, with third-party jar packages and DLL file

solution advantages disadvantage Jacob powerful call the VBA interface directly, process The server must be: Windows system + install Office; server-side automation COM interface prone to dead processes causing server downtime Apache POI Excel operation is powerful; cross platform operation word is weak; You must write different code for DOC and docx two document formats; poor compatibility iText

Recently in the VS2008 using VC + + to two ArcGIS engine development, using a period of time will be found for some smart pointers, can not be intelligent hints that contain the properties, methods, etc. The most obvious point is that the declared smart pointer variable is not displayed according to the color of the variable (the default should be blue, now it is only black), because the visual assist parsing the current project produces a larger cache (I personally think its internal use of inc

.__version__The effect is as follows, you can know my OpenCV version is 3.4.0　　Second, Pycharm import cv2 Problem Solving methodPip installed OpenCV, but in the Pycharm import Cv2 still will error, this is why? I also Baidu for a while to find a solution, here Reference blog: 77686807 This blog is a good solution to my problem, but the blog method last feeling a bit redundant, only the first step to solve the problem.　　Workaround:　　To determine if the environment variable in the pycharm contains

I. Description of requirementsVMware by bridging the way can Sisu network, but the IP address of the virtual machine and physical network card in the same network segment, the Internet environment different virtual machine must follow the IP address is very troublesome, so it is best to use the host-only way to the Internet.Especially when doing architectural experiments, if you set up a dual Nic ... Often have a variety of problems, with host-only this way is much simpler, both in different net

Error messagepackage' libxml-2.0 ',requiredby' Ggobi ',notfound Cause of errorGgobi Lack of libxml dependencySolution Solutionssudo apt install libxml2sudo apt install Libxml2-dev(Note that there is a pit that, after running the first instruction, there will still be a lack of libxml2 dependencies, because many Linux distributions will be disassembled, and the parts of the development are split separately.) In our actual operation, there will be a lack of header files, static libraries, and s

note that the first path is., which means that Java looks for the relevant dynamic link library under the current path. So as long as we put together the dynamic link library and the. class file, there is no problem finding the dynamic link library. If the current directory is not included in the print, we can specify the current directory by modifying Ld_library_path.In addition, we can specify in the process of running:Java–djava.library.path= "/home/savedlib/" ExecutablefileUsing this method

Locations. For example:C:\> \path\to\vcvarsall.Bat x86_amd64c:\> Set LIB=c:\openssl- 1.0. 1f-64bit\lib;%libc:\> set Include=:\openssl-1.0 1f-64bit\include;%%c:\> pip Install cryptography Building Cryptography on LinuxCryptography should build very easily on Linux provided are a C compiler, headers for Python (if you ' re not using PYP y), and headers for the OpenSSL and Libffi libraries available on your system.For Debian and Ubuntu, the following command would ensure that the req

execution calls SendMail email? Man 5 crontab When viewing the Help manual, find this passage:In addition to LOGNAME, HOME, and SHELL, cron (8) would look at MAILTO if it had any reason to send mail as a result of Running commands in "this" crontab. If MAILTO is defined (and Non-empty), mail was sent to the user so named. If MAILTO is defined but empty (mailto= ""), no mail would be sent. Otherwise Mail is sent to the owner of the crontab. This option was useful if you decide on/bin/mail instea

existSolution:(1) Create a new virtual machine instead of creating a hard disk(2) SSH login host to find the location and directory of the XX-FLAT.VMDK files,(3) Create a new XXX.VMDK file in the same directory as the above file, the size is as large as the xx-flat.vmdk file,Use Ls-la to view the xx-flat.vmdk file size,Create a new disk file with Vmkfstools-c file size-a lsilogic XXX.VMDK(4) Add this disk file to the newly created virtual machine;(5) Overwrite the new XXX-FLAT.VMDK with the ori

Using the command line, enter Exec=env ubuntu_menuproxy=0 or create a shortcut to eclipse, ECLIPSE.DESKTP content as followsType=application Name=eclipse Comment=eclipse Integrated Development environment Icon=/usr/share/app-install/icons/eclipse.png Exec=env ubuntu_menuproxy= Eclipse (the path to eclipse) Also note that there is a space between the equals sign and the eclipse path.UBUNTU14 Eclipse Luna cannot display menus, solutions

Q1:wine QQ ProblemWe are using the depth of wine QQ (in fact, by crossover this software indirectly installed win software, I think the middle should be added a layer similar to the vmworkstation of the virtual layer bar), interface because it is a compatibility software problem will make us look very friendly (after all, is the Windows software), but generally after running a minute or two will automatically error and then quit ... I don't say much, the problem is finished!!!A1:sudo chmod $HOME

Create a new text, name Localization (must be the name), file name: Localization.txt, Content format: KEY, language name 1, language name 2 ...,Place the Localization.txt in the resources root, and then create a new Uilabel to add script Uilocalize to the Uilabel object (ngui->attach->localization Script),Fill in the key,Run, you will find that the default will always display English, so you need to start the game before the beginning, that is, the first time the initialization, set the language

Solutions for QT programs not being able to input Chinese in LinuxA netizen asked me how to enter Chinese in the QT application of Linux, I didn't think it was a problem at first, but I tried it on the back. Not only QT-made applications, even QT creator are not supported. After reading some information, understand the QT application methods, here to share with you.Write a bash script that reads as follows:#!/bin/shcd Yourbinarydirectoryexport Qt_im_m

Recently, using Hibernate to do the project encountered a problem: When using Detachedcriteria dynamic query, query conditions exist multiple or.Restrictions.or () is usually used, but what if the number of or is not determined?Solution: Use Org.hibernate.criterion.CriterionThe code is as follows:Detachedcriteria criteria =null= restrictions.in ("id", "");//First query condition for (int i = 1; i ) { criterion = restrictions.or (criterion, restrictions.in ("id", ""));//n+ query condition}if (c

do not want to adjust, download a copy of the IDEA14 shortcut key document to save on the desktop, compared with Eclipse, shortcut features can be found.Refresh in 8.eclipse, cleanup restart is replaced with file->invalidate catch/restart in idea. Encounter various packages and other obvious compilation of different issues, you can clean up Maven fame (that is, the above 4 of the problem), re-click on this is OK.10. More commonly used shortcut, CTRL + N query class, and then through the project

Java.util.concurrent.threadpoolexecutor$worker.run (Threadpoolexecutor.java:615) at Java.lang.Thread.run (Thread.java:744) January02, 2014 2:38:27 pm org.apache.catalina.startup.HostConfig deploydirectoryThe reason for the error is that eofexception indicates that the input process has unexpectedly reached the end of the file or the signal at the end of the stream, resulting in a failure to obtain data from the session. This is due to a number of active sessions being persisted (shown as tempor

"Billsave"; }}In Test.controller.billsave.BillSaveController, use: PackageTest.controller.billsave;ImportOrg.springframework.stereotype.Controller;Importorg.springframework.web.bind.annotation.RequestMapping;/*** Created by Liuch on 5/27/15.*/@Controller ("Realbillsave" )@RequestMapping ("/billsave_test") Public classBillsavecontroller {@RequestMapping ("/test") PublicString Test () {return"Test"; }}The above two controllers, as long as a name can be guaranteed, but the best of two are used.

perform the acquisition lock_2 when, or threadb continue to perform the acquisition Lock_1 when , Lock_2/lock_1 were possessed by each other,* 4.THREADA/THREADB thread blocking, causing a deadlock phenomenon**/class Deadlocker {int field_1;Private Objectlock_1 =newint[1];int field_2;Private Objectlock_2 =newint[1];Public void method1 (int value) {synchronized (lock_1) {Try {Thread. Sleep (100);} catch (Interruptedexception e) {E.printstacktrace ();}System. out. println (" current thread:" +