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Notes commonly used by spring MVC: An introduction. @Controller @Controller is responsible for registering a bean into the spring context, the Bean ID defaults to The class name starts with lowercase letters, and you can specify them as follows Method One: @Controller public class TestController {} Method Two: @Controller ("Tmpcontroller") public class TestController {} @RequestMapping 1. @RequestMapping the URL

MPEG-1: Is the first video and audio lossy compression standard developed by the MPEG organization. The video compression algorithm was defined in 1990. At the end of 1992, MPEG-1 was formally approved as an international standard. MPEG-1 is a video and audio compression format that is customized for CD-ROM media. A 70-minute CD-ROM transfer rate is approximately 1.4Mbps. The MPEG-1 uses the technique of block-mode motion compensation, discrete-string transform (DCT), quantization, and optimizes

Label:For DBAs, backing up and refreshing resumes is two of the most important tasks, and if a failure occurs and the backup is not available, then the importance of refreshing the resume appears, wow! Of course, backup is the most important thing for DBAs (not one), and in a conditional scenario, we should keep multiple full and log backups on multiple servers, and even some companies will require complete data to be retained on tape or over large storage to ensure that data can be recovered lo

forward increment lookup) Ctrl+alt + key class Ctrl+alt+↓ Copy the current row to the next row (replication incremented) Ctrl+alt+↑ Copy the current line to the previous row (copy incremented) Alt+shift + key class The following shortcut keys are commonly used in refactoring (note: The shortcut keys for general refactoring are Alt+shift + key classes) Alt+shift+r Rename (of course, F2 can have the same effect) Alt+shift+m Extraction Method (This is

SQL Server AlwaysOnZhong 445Survey report on port usagePart I: official documentation from MicrosoftMicrosoft Knowledge Base article 832017:service overview and network port requirements for WindowsFor our production environment SQL Server AlwaysOn FCI AG Hybrid deployment, based on Active Directory and cluster Service.The following information is referenced from KB 832017 and describes the related port requirements based on these two services:1. Active Directory (Local Security Authority)Activ

Summary:In many cases, MySQL will use a temporary table to summarize when it will be used to temporary tables what is a temporary table mysql is used to store some intermediate result sets of the table temporary table only when the current connection is visible when the connection is closed, MySQL automatically deletes the table and frees all the space. In many cases, MySQL uses temporary tables to summar

I. Checking the data filesNote: The bbed operation should be performed in the Shutdown database mode[[emailprotected] controlfile]$ DBV file=/u01/app/oracle/oradata/orcl/datafile/test_01.dbf blocksize= 8192dbverify:release 10.2.0.1.0-production on Fri Jan 23:05:01 2015Copyright (c) 1982, 2005, Oracle. All rights reserved. Dbverify-verification Starting:file =/u01/app/oracle/oradata/orcl/datafile/test_01.dbfblock CHECKING:DBA = 20974772 , Block Type = ktb-managed data blockdata header at

Tags: find content shu xxx Establish create file binary file soft connect account diskLinux Prophet: Linux history:I will not say more about this, in fact, is a very interesting story string, online to find a lot of.UNIX-like system directory structure:Ubuntu does not have the concept of a drive letter, there is only one root directory/, all files under it　　　Linux Directory /: root directory, only directory under the general root directory, under Linux there is only one root directory. E

Label: Company projects have been using MyBatis as a persistent layer framework, natural, dynamic SQL is also more written, the most common is to use the IF tag in query statements to dynamically change the filter conditions. One of the great features of MyBatis is its dynamic SQL, which eliminates the hassle of splicing SQL, which is common and uncommon in the development of your project, and you can now summarize this piece. 　If Choose (when,otherwise) Trim (Where,set) Fo

Label:Bit: integer, value range [0,1,null], for accessing Boolean values Tinyint: integer, value range [0~256] smallint: integer, value range [ -215~215] int: integral type, range of values [ -231~231] Decimal: Exact numeric type, example: Decimal (8,4); Total 8 digits, 4 digits to the right of the decimal point Numeric: Similar to decimal SmallMoney: Currency type Money: Currency type FLOAT: Approximate numerical type Real: Approximate numerical type smalldatetime: Date and Time type, represent

Linux:The chattr command is very useful, and some of these functions are Linux kernel version to support, if the Linux kernel version is less than 2.2, then many features can not be implemented. The same-D check for errors in compressed files requires 2.5.19 or more cores to support. most of the Linux systems that run today are more than 2.6 cores. Modifying a property with the chattr command can improve the security of the system, but it is not suitable for all directories. The CHATTR command

+ Key ClassCtrl+alt+↓ Copy the current row to the next row (replication incremented)Ctrl+alt+↑ Copy the current line to the previous row (replication incremented)Alt+shift + Key ClassThe following shortcut keys are commonly used in refactoring (note: The shortcut keys for general refactoring are Alt+shift + key classes) Alt+shift+r Rename (of course, F2 can have the same effect)Alt+shift+m Extraction Method (This is one of the most common methods of

the 5 types of closures, and simply understand what closures are. It will be explained in detail later.The 1th kind of notationfunctionthis. r == 3.14159functionreturn This isvarnew Circle (1.0); alert (C.area ()); There is nothing special about this notation, just adding some attributes to the function.The 2nd kind of notationvar function varnew= 3.14159functionreturnthis . PI * R *returnvarnew1.0);The notation is to declare a variable and assign a function as a value to the variable.The 3rd

@Controller @Controller is responsible for registering a bean into the spring context, the Bean ID defaults toThe class name starts with lowercase letters, and you can specify them as followsMethod One:@Controllerpublic class TestController {}Method Two:@Controller ("Tmpcontroller")public class TestController {}@RequestMapping [email protected] is used to define the URL of the access, you can define an entire class@RequestMapping, or specify one for e

This article link: http://codingstandards.iteye.com/blog/1142358 (reproduced please specify the source) Description of UseCreate a static library. a file. It is often used when developing programs in C/D + +, but I rarely use AR commands on the command line alone, usually in makefile, and sometimes in shell scripts. For knowledge about library files, static libraries, dynamic libraries, and how to create and use Linux, see the related data "3", "about

If you're thinking about learning python, or you've just started learning,You might ask yourself, "What can I do with Python?" ”This is a tricky issue, because Python has a lot of uses.But as time goes on,I have found that Python can be used for a few three main things:Web DevelopmentData science – including machine learning, data analysis and data visualizationScript writingLet's take a look at it in turn.First, web developmentPython-based web framew

integer that is less than 0, indicating that the first request arrives when it is loaded-Springmvc-firstURL rule, stating:1.*.do, which indicates that a request with a. Do end enters the front controller2./, which means all requests go to the front controller--1.4 Writing pages and controllersA few important points:1.4.1 Controller Note To add, that is, controllers.1.4.2 Modelandview: Models and views. The view used to set the response, the model dat

extension Function: Calculates the overall standard deviation of the population of a list or database that satisfies a specified condition in a column. Grammar DSTDEVP (Database,field,criteria) The database makes up the range of cells in the list or the databases. A database is a list of related data that contains the behavior records of the related information and the column fields that contain the data. The first line of the list contains the flags for each column. field specifies the da

PHP regular expressions are used primarily for string pattern segmentation, matching, lookup, and substitution operations. Using regular expressions can be inefficient in some simple environments, so how to better use PHP regular expressions requires a comprehensive consideration. my PHP is getting started, is the origin of an article on the Internet, this article elaborated the PHP regular expression using the method, I think is a very good introdu

There are several differences between the function parameters of an array masterpiece and the argument of an array element. 1 when an array element is used as an argument, the type of the array element as the subscript variable is also the same as the type of the function parameter variable, as long as the type of the array and the types of the function's parameter variables are the same. Therefore, the parameter of a function is not required to be a