teleconference solutions

My error message here shows:org.apache.ibatis.binding.BindingException: Parameter ‘reqUsername‘ not found. Available parameters are [0, 1, param1, param2]Cause: When there is only one parameter, mapper can not use @param, but when there are multiple arguments, use @param.The original code: @Select("select * from tz_user where " + GlobalConfigure.USER_AUTH_SQL_SUFFIX) ListChange to: @Select("select * from tz_user where " + GlobalConfigure.USER_AUTH_SQL_SUFFIX) ListSuccessfully returne

We may use the output stream of the page when we are doing file upload or download, or filtering.For example, use in action:Response.reset ();Response.setcontenttype ("application/vnd.ms-excel");OutputStream OS = Response.getoutputstream ();Throw exception: Java.lang.IllegalStateExceptionCause Analysis:This is a out.write ("") in the servlet code generated by the Web container, which conflicts with the Response.getoutputstream () called in the JSP.That is, the servlet specification description,

value inside the map functionAppendix:How to work with multiple files, one map per file?For example, to compress (zipping) some files on a cluster, you can use the following methods: Using Hadoop streaming and user-written mapper scripts: Generate a file containing the full path of all files to be compressed on HDFs. Each map task obtains a path name as input. Create a mapper script that implements the following functions: Obtain a file name, copy the file locally, com

and practical explanationThe 13th chapter high concurrency Message queue idea13-1 high Concurrent Message Queuing-113-2 high Concurrent Message Queuing-213-3 high Concurrent Message Queuing-3The 14th chapter on the application of high concurrency split thinking14-1 high concurrency application split-114-2 high concurrency application split-2The 15th chapter on the application of high concurrency limit current thinking16th Chapter High concurrency Service downgrade and service fuse thinkingThe 1

Putty after a remote connection to the server, it often prompts "software caused connection abort" and often loses connectivity in a short period of time.The solution is as follows:First step : Set up the server1, modify the server/etc/ssh/sshd.config file, set the value of Logingracetime to 0,tcpkeepalive set to Yes2, service sshd restart restart sshd services.Step two : Set the putty left connection project to set "sending of NULL packets to keep session active", set to send a packet every few

: (84046924)-No Such process / close hostd The server is causing the. Description hostd process not kill to. (Cause to run the /etc/init.d/hostdstartorstop PS | grep hostd you'll see123456233 789789789 hostd456123358 789789789 hostd123 789789789 hostd123458985 789789789 hos TdIndicates that there is a hostd process in the run /ETC/INIT.D/HOSTD stopReview the process again ps|grephostd123456233 789789789hostd456123358789789789 hostd123789789789hostd123458985 789789789hostd ...

--only -upgrade bash--debian --apt-get Updateapt- -y install --only-upgrade bash Now execute the instrumentation command again:[~]#-i X=' () {(a) =>\ ' bash-c 'echo date'; cat echo datecat:echo:No such file or dir ectory# #同前面, Output date indicates successful repair # # » Reprint Retain Copyright: it chen Yi» "Bash Shellshock Final Solution"» This article link address: http://www.ipython.me/centos/bash-shellshock-solution.html» This article copyright take: BY-NC-SA agreeme

e325:attention file "******** " ******* Press ENTER or type command to continueThe reason is that in the VI or VIM operation before the use of VI or VIM operation of the file with an abnormal interruption, so in the current directory produced a. ****.swp file, this file using the LS command to view can not be found, use the ls-a command to see what is known as a hidden file.To remove the above warning, delete the fileLinux under VI or VIM operation found a swap file by the name causes a

(). Iterator (); It.hasnext ()) {Object ele = It.next (); Bb.remove (ele); Wrong}system.out.println ("success!");}}Cause: Iterator do traversal, HashMap is modified (Bb.remove (ele), size-1), Iterator (Object ele=it.next ()) will check HashMap size,size change, Throws an error concurrentmodificationexception.Workaround:1) Modify Hashtable while (It.hasnext ()) {Object ele = It.next () via iterator; It.remove (); }2) According to the actual program, you manually to the iterator tra

When you use Word to edit a document, you will inexplicably encounter an error that probably means: "Mocrosoft Office Word encounters a problem that needs to be closed." ” Whether you select Restore my work and restart Mocrosoft Office Word, see the following figure! You can only turn word off, but you can't start Word normally. This is enough to show that word has encountered a fatal problem, how to solve it? Of course, the workaround provided in this article refers to the method that

is called. NET project, you also need to set its target platform properties exactly the same as the platform on which the unmanaged DLL is running. The unmanaged DLLs that are typically left behind are x86 based, so that the unmanaged DLLs are invoked. NET project, set its target platform property to "X86". You can find this setting according to the project-> properties-> build-> target platform: 2, unable to load DLL, could not find the specified module The run called unmanaged.

Desktop icons have three solutions for the Blue bottom, Method one, right click on the desktop, select "Arrange Icons" to make sure that "lock Web items on the desktop" is not checked Method Two, 1. Right click on "My Computer", select Properties 2. Switch to the "Advanced" tab, click on the performance of the "Settings" button, as shown in the following figure 3. Switch to the "Visual effects" tab, pull down the right s

XP system various missing "search" feature solutions Click the Start menu in the lower left corner, click Run, type%systemroot%inf in the Open Run dialog box, enter Navigate to the "Srchasst.inf" file in the Open folder window Insert the System installation CD, right-click the "Srchasst.inf" file, and click the "Install" item Workaround for the "search" feature error Type the cmd command in the start → Run dial

Three solutions for WIN8 system networks are always limited Method One: 1, in the lower right corner of the computer right click on the wireless network icon, in the pop-up menu select Open Network and Sharing Center 2, into the Network Sharing Center, click to open the "connection" to the right of the WLAN 3, into the WLAN status page, show no Internet access rights, click on the Open page of the properties button below 4,

If you forget the MySQL root password, you can reset it in the following ways: 1. Kill off the MySQL process in the system; 2. Use the following command to start MySQL, to do not check the permissions of the way to start; Mysqld_safe-skip-grant-tables 3. Then use the null password method to log in to MySQL with root user; Mysql-u Root 4. Change the password of root user; mysql> Update Mysql.user Set Password=password (' New password ') where user= ' root '; mysql> flush Privileges; Mys

Warm tip: You can press the CTRL+F key to open the search function, quickly locate the problem you want to solve. 　　1. Mobile phone is not connected to the assistant, how to do? A: Connectivity issues are currently known issues, because the Millet assistant to connect the mobile phone using millet unique MDB, do not need to open the USB debugging mode, the problem involved is very complex, the development team is fully resolved. There are currently the following temporary

Method One: Modify the local or wireless connection DNS server for 8.8.8.8 and 8.8.4.4 1, right click on the lower right corner of the network connection icon "Open Network and Sharing Center"-Click the connection you are using; 2, click "Properties"-"Network"-"Internet Protocol version 4"-"Properties"; 3, select the General tab-Select Use the following DNS server address, enter 8.8.8.8 and 8.8.4.4, and finalize. Method Two: Reboot the system 1, in the WIN7 system click Start-run-inp

into PE and blue screen, in the end what is the reason? Don't worry, here are two more common blue screen solutions: One: The hardware errors shown by c000007b should be related to the compatibility mode of your hard drive interface. You just need to go into the BIOS set up the compatibility mode of the hard drive interface should be able to solve the problem should be changed to SATA mode you might as well try it, just set the BIOS should be OK Err

XP system open Web site tips Service Unavailable Solutions Specifically as follows: Restart the Web site's IIS, and then restore access to the Web site 1, restart the IIS method (1) as shown in the following figure, the IIS restart can be implemented by entering IISReset in the start-〉 operation; (2) as shown in the following illustration, you can restart IIS by opening IIS and then right-clicking-〉 All Tasks-〉 IIS;