all domains

Use reflection to get the variable name of the class, give you an examplepublic class MyTools {public static void Setallcomponentsname (Object f) {Gets all domains in the corresponding class of the F objectfield[] fields = F.getclass ().

When we are developing projects, we typically use AJAX to request data, but there are cross-domain issues when using AJAX.Why is there a cross-domain problem?Cross-domain problems arise from the same-origin JavaScript policy, which means that access

First, the configuration httpd support PHP1?HTTPD's master configuration file:/usr/local/apache/conf/httd.conf1. After we have installed the httpd, there will be a prompt set ServerName, we enter the above configuration file, the # number in front

What is to be saved is also preserved. In general, we just need to save the logical data. Data that you do not need to save can be marked with the keyword transient. Here is an example: Import java.io.*; public class serial implements

Introduction Cross-Domain is a question that I often ask in everyday interviews, the word's frequency is not low in the front-end world, mainly because of security restrictions (homology policy, that is, JavaScript or cookies can only access the

Database optimization includes the following three parts, database optimization, database table optimization, program operation optimization. This article is part II Optimizing ①: Designing standardized tables to eliminate data redundancy

1, three ways to ensure thread safety: A, do not access shared variables across threads b, make the shared variable final type C, add the operation of the shared variable to the synchronization 2, it is easier to design a class as thread-safe at

Optimizing ①: Designing standardized tables to eliminate data redundancy Database paradigm is a database design method that ensures the structure of database is reasonable, satisfies various query needs and avoids abnormal database operation. The

First normal form (1NF) No duplicate columns (atomicity) The first normal form (1NF) means that each column of a database table is an indivisible basic data item. All domains should be atomic, that is, each column of the database table is an

In the Java java.policy This file, the definition of some information, such as Grant, is to authorize certain files, similar to liscense files, This file takes a sandbox pattern, encapsulates a number of allowable ranges, enhances security, For the

JAVA7 Security mechanisms and the use of self-signed certificates Created on 2013-11-13 Updated on 2014-5-8 Java to enhance security, up to 1.7.45 has added several security features, meta-inf/manifest in the jar package. MF files are used to

Migrating Exchange 2003 to Exchange 2007 Exchange 2007 has been published for some time, and the new version adds a lot of practical new features, such as Exchange 2007 with encrypted messaging, support for push mail to mobile devices, and more.

1. Environment configuration The Silverlight version of this article is SILVERLIGHT3, and the specific configuration process can refer to: http://www.cnblogs.com/psunny/archive/2009/08/31/1556976.html or HTTP ://www.cnblogs.com/wheeloffate/archive/2

First paradigm:The so-called First paradigm (1NF) refers to a specification requirement for domain additions in a relational model, where all domains should be atomic, that is, each column of a database table is an indivisible atomic data item, not

2018-02-04 23:03:28I. Relational data ModelThe basic data structure of the relational model is only one: Table (relation). in the relational data model, the relationships of entities and entities in the real world are expressed in tables , while

What is a paradigmWhen designing the relational database, we should design a reasonable relational database to conform to different specifications, and the different norm requirements are called different paradigms, and the higher the paradigm is,

First, the basic concept1 Relationship ModelTable : The concept of mathematical relationships is closely related, and the relational database is a collection of tables. A row in the table represents a link between a series of values.Properties : The

1 Tools for extracting textFile content: Less and catFile interception: Head and tailExtract by column: CutExtract by keyword: grep1.2 File ViewFile View command:Cat,tac,revCat [OPTION] ... [FILE] ...-E: Display line terminator $-N: Numbering each

awk: report generator, formatted output of text content, i.e. custom output text, displayed on the terminal.AWK has multiple Versions: New awk (Nawk), GNU awk (gawk)Linux uses Gawk,gawk as a mode scan and processing language.Gawk is also a

The first paradigm (1NF) is the so-called First paradigm (1NF), which refers to a specification requirement for domain additions in a relational model, where all domains should be atomic, that is, the database tableEach column is an indivisible