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Es 6 some features

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youtube tutorial: https://www.youtube.com/watch?v=IEf1KAcK6A8 1 let and scope, 2 const, 3 array function 4 default value 5 Object iteral ext...

CLEAN CODE

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This post use language vietnames is, the future is will introduce english version. The clean code for java also application for the others. ...

Check Status object

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 1 check Null and Undefined And primative datatype if(object){ // object is not null, undefined, 0, '', false.  but it can empty({})...

JPA find and getReference

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JPA find() & getReference() in javax.persistence.EntityManager * find (): always call select from DB   Use for select one entity from DB...

Spring hibernate Lifecycle

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Persistence Context has two implemnet is JPA EntityManage and Hiberbate Session Example use Session of hiberate  has exist github you can vi...

Collection Java

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Knowledge of collection in java Interface Iterator interface Collection interface List Interface    Queue Interface    Deque Interface    Se...

Compare List Java

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For immutableuse equallist we simple use list.equal list it return true if content same. (compare index)  //case true  List<Integer> l...

Java Copy

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 1 Copy Object in java Use = for immutable class ex: Integer , String or Wrapper classes Object   Use Contructor has paramater copy, ObjectA...

DateFormat String format

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Parse LocalDateTime to String to pattern  year :                      yyyy || 2021 month of year:       M / MMM / MMMM || 06 / Jun / June da...

Hibernate Notice

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  1)  CRUD có thể sử dung find Compositekey hoặc findBy compositeket + column in composite   2) CRUD findBy column And column  3 Not LazyLoa...

Java notice

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  1 Enum quang trọng thứ tự trong khai báo  nó sẽ quy định ra get ra cái gì  2) Sort      3 Rounding value in java 3.1 Rounding value number...

Oauth 2.0

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Preface Khái niệm   Oauth và ApIs Scope and consent (phạm vi và sự đồng ý) Oauth Actor Oauth Tokens   Front Back Channel Giả Xác thực Với Oa...

se11

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Preface Oracle đã released java 11 trong tháng 9-2018, chỉ sau 6 tháng sau khi version 10 ra mắt. Java 11 là long-term support (LST) release...

Spring core

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 Preface Knowledge about this part: Spring code: Spring – IoC Containers Spring – Inversion of Control vs Dependency Injection Spring 5 – Be...

jwt with spring

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 Preface Understanding Spring Security Architecture     How To Keep Authenticaion (Client vs server, API)     Session Management     JWT (th...

vocabulary

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potentia: tiềm năng whatever kind of: bất cứ loại + capacity (noun) : sức chứa subtaning: duy trì. capacity for sustaining: khả năng duy trì...

Web Notice

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Forward (Chuyển tiếp) & Redirect (điều hướng) Forward : When request of brower send to Servlet, it can forward request to a page other o...

internationalization i18n

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 i18n mean i to n has 18 number character Use: Config messageSource in file config   1) Use jstl  Pom:  <dependency>             <g...

Spring Security Notice

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 1) The order of the antMatchers() Note that the order of the antMatchers()  elements is significant – the more specific rules need to come ...

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