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Spring MVC interceptor 01 and spring MVC blocker 01 Spring MVC InterceptionRole: identity verification and permission check to prevent unauthorized access.Scenario: In a bbs system, users cannot post or delete comments without logon;A blog system cannot post a blog without logon, add a category, or delete a blog. Spring MVC interception implementation is divided into two steps(1) Compile the interceptor cl

1.head Information1. You can set the title of the page. 2. You can notify the browser to interpret the HTML page using the specified code table. 3. Keywords-- -The contents of the It's a nice day today ...the contents of the block label HTML tag function: Used to describe the structure of a Web page.If you want to manipulate the style of the data: manipulate the properties of the label. What would you like to eat tonight? 01.html Learning

Raspberry Pi-01-start, Raspberry Pi-01-start What is Raspberry Pi? You don't know? I went to Baidu, an interesting hardware. Online shopping of a batch of accessories, finally arrived, 16 gb sd card, Raspberry Pi, Raspberry Pi box, heat sink (2 pieces of pure copper), dubang line (said to be useful in the future) I. Assemble hardware Assemble Raspberry Pi. The Assembly is completed in 5 minutes. Ii. Inst

Exception-note-01,-note-01 1. Use try-catch to catch a single exception If an exception occurs, the program will be terminated immediately. We have to handle the exception: 1): This method is not processed, but declared and thrown, which is handled by the caller of this method (throws) 2): Use the try-catch statement block in the method to handle exceptions- Use try-catch to catch a single exception: Syntax

Search and sorting 01, linear search, time complexity, algorithm, 01 linear search Linear search is definitely a linear query of an element in a set or array. This article includes: Understanding linear search through code Time Complexity What is an algorithm? Understanding linear search through code What is "linear "? Let's try it out in the Code. First, we need a set or array. How can we g

01. Static factory method substitution constructor, 01 ConstructorConsider replacing the constructor with a static factory Method The reason for using the static factory method to replace the constructor is as follows: Consider the following program: Random random = new Random();BigInteger integer = BigInteger.probablePrime(3, random); The meaning of this Code is to return a BigInteger object that is likely

A simple small example to achieve the current time, the JS code is as follows:function getdate () {var date = new Date ();var mon = date.getmonth () + 1; GetMonth () returns 0-11, plus 1 is required.if (Mon Mon = "0" + mon;}var day = Date.getdate (); GETDATE () returns 1-31, no additional 1 is requiredif (day Day = ' 0 ' + day;}document.getElementById ("Acc_time"). Value = Date.getfullyear () + "-" + Mon + "-" + day;}Here is the HTML code:OnChange () and onkeyup () Two events are intended to all

Title Address: http://acm.nyist.net/JudgeOnline/problem.php?pid=1 DescriptionThis title is titled Practiced hand, please calculate the value of a+b inputEnter two numbers, A, bOutputThe value of the output a+bSample input2 3Sample output5 C language version:#include int main (){int A, B;scanf ("%d%d", a,b);printf ("%d\n", a+b);}C + + version:#include using namespace Std;int main (){int A, B;cin>>a>>b;cout}01-Language Primer -

JDK source code analysis collection 01 overall framework, jdk source code 01 overall A collection class is a tool class provided by java, mainly including List, Set, Map, and vector. All collection-related classes are located in java. util. The overall framework of the Collection class is shown in: Description of the overall framework: The top-level interfaces in the Collection framework are Iterator, Coll

Reflection recognition _ 01 _ reflection construction method and recognition _ 01 Reflection Structure Package ReflectionConstructor; Import java. lang. reflect. Constructor; /*** Call the String constructor to convert the StringBuffer class to the String class.*/Public class ReflectionConstructor {Public static void main (String [] args) throws Exception {// Original conversionStringBuffer sb = new Stri

Spring4 declarative transaction -- 01 annotation method, spring4 -- 01 1. Introduce the tx namespace in the spring configuration file xmlns:tx="http://www.springframework.org/schema/tx" 2. Configure the Transaction Manager 3. Enable transaction Annotation 4. Add @ Transactional above the corresponding business code method to indicate that this method is managed by transactions. // Spring declarative trans

Python Study Notes 01-basics, python Study Notes 01 --I. interpreted language Python is an interpreted language, which means: L The compiled code can be run without compiling connections, saving debugging time L python interpreters are well implemented in most systems, so the compiled code can run in any system. However, this also means: L interpretation execution efficiency is relatively low, so the progra

01-common operations on strings in python, 01-python strings (1) find Check whether str is included in myStr. If yes, the initial index value is returned. Otherwise,-1 is returned. In [1]: myStr = "hello world tairan and tairanCity."In [2]: str = "tairan"In [3]: myStr.find(str)Out[3]: 12In [7]: str = "helo"In [8]: myStr.find(str)Out[8]: -1 (2) index Search for indexes. In [9]: myStr = "hello world tairan an

Elasticserach learning notes-01 basics, elasticserach-01 ElasticSearch has several core concepts that help us throughout our learning process. Near real-time (NRT)Elasticsearch is a near real-time search platform. This means that there is only a small time difference (usually 1 second) from when you create an index for a document to when the document can be retrieved ). Cluster)A cluster is a collection of

QT learning notes-01, learning notes-01 This is my note for studying Qt, and it should not be too careful. The first thing is HelloWorld, So, create an Apllication program and select Qt Widgets Application. (In my tutorial, select Qt Gui application, and create the QT desktop program) 1 #include "mainwindow.h" 2 #include After clicking the Green Arrow, the interface is displayed. Is it a success ?! //-

[Development] 01. Database authorization and connection, 01 database authorization A WeiPHP framework application (called A) is built on Sina SAES. It implements A wall function and wants to display the wall content through A front-end web page, rather than through the WeiPHP framework. In this case, you need to authorize the database of the WeiPHP framework application to the web site application (called

Network start --- multithreading --- NSThread-01-Basic use (understanding) (2), ------ nsthread-01- 1 # import "HMViewController. h "2 3 @ interface HMViewController () 4 5 @ end 6 7 @ implementation HMViewController 8 9-(void) viewDidLoad10 {11 [super viewDidLoad]; 12 // Do any additional setup after loading the view, typically from a nib.13} 14 15 // download operation, 16-(void) download :( NSString *) u

01. (Latest Version) Environment configuration of Baidu map, 01. Reprinted please mark: http://blog.csdn.net/u012637501/article/details/45588377 I. Eclipse Engineering Environment Configuration 1. Download SDK and apply for Key See http://developer.baidu.com/map/index.php? Title = androidsdk/guide/key. Note that there is no exception in executing the keytool command. In the JDK bin folder, you can add the a

uiview, responsible for monitoring the internal events of UIView, responsible for handling uiview and user interaction; Uiviewcontroller has a UIView attribute inside it, which is the UIView object that it manages: @property (nonatomic, retain) UIView *view;2, Ibaction Iboutlet Ib:interface Builder interface setup; Ibaction: Requires action, such as a button click; Iboutlet: The attribute needs to be obtained and modified; You can establish a connection with story

the J and temp variables are used to store the current subscript and its corresponding value. So the role of temp is that we can find out where the insertion is, what the value should be inserted, and the meaning of J's existence is to determine where the position is. So, we're going to compare the previous one to temp in the while loop with the value of the descending j, and if that's the case, then I'm going to move backwards, knowing that it's not moving (while the condition of the while loo