initialized: Data is formatted for the request message. such as converting a string into a formatted number or a formatted date.
Data validation: Verify the validity of the data (length, format, etc.), and verify that the results are stored in Bindingresult or error.
(5) when the Handler (Controller) executes, returns a Modelandview object to Dispatcherservlet;(6) According to the returned Modelandview, select a suitable viewresolver(must be a viewresolver already registered in the spr
Serialization principles from Hadoop Writable serialization framework to java
After the previous module, the analysis content comes to the Hadoop IO-related module. The module of the IO system is a relatively large module, In the Hadoop Common io, it consists of two major sub-modules, one is a serialization Module Based on the Writable interface, and the other is a decompression module. Therefore, we plan t
features of spring, such as Message,messagechannel,messagehandler.Data access/integarationThe Data access/integration layer contains the JDBC/ORM/OXM/JMS and transaction modules. SPRING-JDBC, provides a JDBC abstraction layer. SPRING-TX, supports programmatic and declarative transaction management classes. Spring-orm, provides a collection of popular object-relational mapping APIs, such as Jpa,jdo,hibernate. SPRING-OXM provides an abstraction layer to support the implementation of object/xml ma
Spring Frame 4 Major principle:
Lightweight and minimal intrusive development with Pojo
POJO (Plain ordinary Java object) Simple Java objects, actually is the ordinary JavaBeans, is to avoid and EJB confusion created by the abbreviation.2. Reduced coupling through control reversal IOC, dependency Injection di, and interface-based programming3. Declarative programming through AOP (facet-oriented) and default conventions4. Use AOP and template programming to reduce pattern code.Sprin
Principles of the tratc (TrafficControl) FrameworkRecently, my work is more or less related to Linux throttling. Since I learned about TC a few years ago and understood its principles more or less, I have never touched it any more, because I do not like TC command lines, it is too cumbersome, iptables command lines are also cumbersome, but more intuitive than TC command lines, while TC command lines are too
My application to the press last week was finally approved and the publishing contract was finalized. Spring 2: Principles and Practices of the Lightweight J2EE development framework is a book that explains spring design principles, I wrote several members of easyjf. Half completed in the early stage, and there is still one month before the submission time. Durin
Python crawler (6) Principles of Scrapy framework, pythonscrapyScrapy framework
About Scrapy
Scrapy is an application framework written with pure Python to crawl website data and extract structural data. It is widely used.
With the strength of the Framework, users can eas
This article describes the basic principles of the Struts 1.1 framework, as well as the installation of Struts 1.1 and a simple example.
1. Origin of struts
Struts is part of the Apache Jakarta project. The goal of this project is to provide an open-source framework for the establishment of Java Web applications. Currently, the general version is 1.1, but 1.2 als
Here's a summary of the general principles of an Android network framework:
HTTP Network Request principle
Learned the "computer network" should all know that HTTP is an application layer protocol, it realizes the reliable data transmission through TCP, can guarantee the integrity and correctness, and TCP for the advantages of data transmission control can also be reflected in HTTP, make HTTP data transmi
=NewOrg.springframework.security.userdetails.User (User.getloginname (), User.getpassword (),true,true,true,true, Authslist. ToArray (Newgrantedauthority[authslist.size ()]); returnUserdetail; } @Required Public voidSetusermanager (Usermanager usermanager) { This. Usermanager =Usermanager; }}Finally, to say the question of the name, I authentication and authority these two words more offensive, two reasons, one is because they are too uncommon, two is because they look too much like, clearly on
It took a while to read through 650) this.width=650; "src=" Https://img3.doubanio.com/lpic/s28378000.jpg "width=" 312 "height=" 426 "alt=" S28378000.jpg "/>1. The evolution of application architecture in Chapter I.It mainly introduces 4 application architectures, which is basically a rigorous mode of enterprise scene.It is important to understand the design principles of SOA. The content of service governance can be used as the theoretical reserve of
the man class for(Method method:methods) {if(Method.isannotationpresent (Description.class) {//For each method to determine whether it exists description annotation System.out.println ("Method:" +method.getname () + "() has Description annotation!"); System.out.println (Method.getannotation (Description.class). Desc ());//The DESC field for printed annotations is winter} by defaultif(Method.isannotationpresent (Override).class)) System.out.println ("Method:" +method.getname () + "has Override a
implementations, which are stronger than JDK, and need to introduce package Asm.jar and Cglib.jar. Facets driven with ASPECTJ injection facets and @aspectj annotations are actually implemented by dynamic proxies.(6). AOP Usage Scenarios:Authentication permission CheckCaching CacheContext Passing content deliveryError handling Errors HandlingLazy Loading Delay loadingDebugging commissioningLogging, tracing, profiling and monitoring logging, tracking, optimization, calibrationPerformance optimiza
PreviousArticle, We introduced the basic principles of the MVC Framework, and pointed out that there are a large number of if... Else problems. Today we will introduce the Struts framework to solve this problem.
First, let's take a look at the rough sequence diagram:
Actionservlet is a central controller responsible for URL or distribution in the collec
Access to files on disk, you must consolidate and move files into memory according to certain rules, and then access this file. The order in which the pages of the files to be accessed are arranged intoRadix tree. Assuming that the file is small and there is no memory writeback and access to the entire file, the logically linear organization of this file page is in memoryhas been transformed into a tree-like arrangement--radix tree (which is very important). But the actual mmap always with dirty
Path for Linux Device Driver engineers-basic principles and framework of network device drivers
K-Style
Reprinted please indicate from Hengyang Normal College 08 electric 2 K-Style http://blog.csdn.net/ayangke,QQ:843308498 mailbox: yangkeemail@qq.com
1. Linux network subsystem
At the top of the Linux network subsystem is the system call interface layer. It provides a socket Method for applications provided
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