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When we use spring, we generally know that transactions are rolled back when they encounter an exception. Do you not know that spring's transaction defaults only to the exception that occurs when execution occurs: runtimeexception, assuming a method

The app is the app domain, and everything in the domain can be accessed through a global function.Mainframe is the main frame and can be accessed basically with global functions.Mainframe is a number of view and document (possibly unpaired) in

1. What is a regular expression? Basically, a regular expression is a pattern used to describe a certain number of texts. RegEx represents regular express. This article uses to represent a specific regular expression. A piece of text is the most

The previous article discussed the advantages of exceptions, the nature of exceptions, and the mechanism of exceptions.Here we will discuss pre-defined exception classes in FCL, custom exception classes, correct usage exceptions (throws, captures,

I think it is the most direct way to look at MSDN by myself. Other people's introductions are full of chews? The IO completion port provides an efficient thread model for processing multiple asynchronous IO requests in a multi-processor system. When

  --------------------------------------This article mainly includes the following content:1. essential differences between Debug and Release compilation methods2. under which circumstances will the Release version go wrong?3. How to "debug" Release

In the previous article to introduce a JavaScript jquery ajax summary, and then introduce JavaScript jquery and Ajax relationship, interested friends to study together Simple summary: 1, JS is a front-end language. 2, Ajax is a technology, it

PHP Error capture processing Exception Exceptions are used to change the normal flow script if an error is specifiedWhat is an exceptionIn PHP 5 comes a new object-oriented way to handle errors.Exception handling is the execution code used to

The study of PHP regular expressions is a very powerful tool. we may use it anywhere... Regular expressions are a very powerful tool. we may use them anywhere...I have worked hard on regular expressions, but I still forget it after a long time...Let'

Principles and experiments of Oracle foreign key index creation In the project, we require that all tables with a primary-child relationship use foreign key constraints to ensure the correct relationship between the primary and child tables. We do

We recommend that you install the firebug and yslow plug-ins in Firefox to facilitate debugging. Golden rule for Web Application Performance Optimization: First optimize the front-end performance, because this is the cost of 80% or more of the end

This article describes how to use the Headless mode on standard Java (Java SE, also known as J2SE) platforms. The headless mode is the system configuration when the display, keyboard, or mouse is missing. It sounds incredible, but in fact you can

Objective:Six months ago to the regular expression of interest, found a lot of information on the Internet, read a lot of tutorials, and finally in the use of a regular expression tool Regexbuddy to find his tutorial written very well, can be said

SQL Server system databases are important, and they should not be modified most of the time. The only exception is the model database and the tempdb database. The model database allows deployment changes to any newly created database, such as a

Guo JiaEmail: [Email protected]Blog: http://blog.csdn.net/allenwellsGithub:https://github.com/allenwellFunctions of a security managerA security manager is a class that allows a program to implement a security policy that checks the access rights of

As we all know, exceptions in Java provide a consistent mechanism for identifying and responding to error situations, and effective exception handling can make programs more robust and easy to debug. An exception is a powerful debugging tool that

There are three sources for Database Design: (1) You can design databases from existing data, such as excel tables. In this mode, you need to consider the normalization of data, (2) design a new database, which needs to build a complete database

DB2 index optimization can make the index more efficient and more reasonable. The following describes the DB2 index optimization policies in detail, hoping to give you a deeper understanding of DB2 index optimization. DB2 index optimization: An

Source: PChome Introduction All Account Policy Group Policy settings can be applied at the domain level. The default value is provided in the default Domain Controller Built in the Account Policy, account lock policy, and Kerberos policy. Remember,

Content in the preface:1. what is the C + + object model? 　　　　1. The part of the language that directly supports object-oriented programming2. The underlying implementation mechanism for various support2. The complete virtual functions of C + +