Oracle + Mybatis implements bulk insertion, update and deletion of sample code

Preface Mybatis is a data persistence framework commonly used in web Engineering development. Through this framework, it is very easy for us to add, delete and check the database. When database connection commits transactions, it consumes a lot of resources. If more updated data are inserted and only one data is submitted per transaction, it w ...

Posted on Sat, 11 May 2019 01:52:03 -0400 by earthlingzed

Java Development Notes Numeric Packing Type

The method originated from optimizing the code structure, but its significance is not limited to this. Because of the method definition, the programming language is more like a tool to solve practical problems, rather than just a calculator that can only be used for addition, subtraction, multiplication and division. In the development of mathe ...

Posted on Sat, 11 May 2019 00:42:57 -0400 by hiprakhar

Other knowledge points of jQuery

API prop() and attr() prop() Method used to change impact DOM Dynamic state of elements, not change HTML Attribute. For example: disabled,checked val() Set or return the values of form elements (input, select, textarea) width() and height() Setting or getting the width and height of the matching element returns number (without units), while $(s ...

Posted on Fri, 10 May 2019 23:12:21 -0400 by believer

[c++] Template Summary

Template: Template is used to adapt to generic programming. Generic programming is to write type-independent code, and it is a means of code reuse. Template is the basis of generic programming. template function 1. concept Template functions represent a family of functions, which are not related to the class's idea, and are ...

Posted on Fri, 10 May 2019 20:51:38 -0400 by bltesar

Function definition and use in java

1. Definition of function What is a function? Functions are a small piece of independent code defined in a class with specific functions, also known as methods. Function format: The name of the modifier return value type function (parameter type parameter 1, parameter type parameter 2,...){ Function execution code; Retur ...

Posted on Fri, 10 May 2019 17:21:34 -0400 by cdm2

Java Value Passing and Reference Passing, Array Passing

Many programming languages have two ways to pass parameters to methods -- by value and by reference.   Unlike other languages, Java does not allow programmers to choose whether to pass parameters by value or by reference. Variables of the basic type (byte--short--int--long--float--double--boolean--char) are always passed by value. As far as o ...

Posted on Fri, 10 May 2019 16:01:14 -0400 by Alffallen

[JavaScript] 5 tips to better write conditional statements for JavaScript(ES6)

When using JavaScript, we often need to deal with many conditional statements. Here are five tips to help you write better / clearer conditional statements. 1. Use Array.includes to handle multiple conditions Let's look at the following examples: // condition function test(fruit) { if (fruit == 'apple' || fruit == 'strawberr ...

Posted on Fri, 10 May 2019 13:50:31 -0400 by regoch

Re-entrant locks and non-re-entrant locks

Re-entrant locks in a broad sense refer to locks that can be called repeatedly and recursively. After using locks outside, they can still be used inside, and deadlocks do not occur (provided they are the same object or class). Such locks are called re-entrant locks. Re-lockable: ReentrantLock and synchronized are re-entrant locks. Here is an ...

Posted on Fri, 10 May 2019 09:40:48 -0400 by iNFERiON

How is thread usage in Android different from that in Java?

Catalog Threads in Java How to Create Threads in Java Thread synchronization in Java (lock, wait,notify,notifyall) Synchronization and atomic operation of guaranteeing access to member variables in Java How to Terminate Threads in Java Threads in Android Communication between threads Handler,Looper,MessageQueue ThreadLo ...

Posted on Fri, 10 May 2019 07:04:39 -0400 by idontkno

Java dynamic proxy, this is enough

This article needs to use Java's reflection knowledge. If you have a partner who is not clear about reflection, you can step here first. Java Advancement-Reflection. Programming ideas come from life, and "agent" is very common in life. For example, when we buy something, we usually don't buy it directly from the factory, ...

Posted on Fri, 10 May 2019 06:06:39 -0400 by SumitGupta