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New feature of JDK8: date time related API Problems with old version date time API: 1. Poor design: in java.tilogjava Sq| has date classes in its packages, java.util.Date Contains both date and time, and java.sql.Date Only. Contains the date. In addition, the classes used for formatting and pars ...

AOP introduction Using the object-oriented method can organize the code well, and also can realize code reuse in the way of inheritance. However, there will always be some duplicate code in the project, and it is not convenient to use inheritance methods to reuse and manage them, such as general log printing, transaction processing and security ...

Summary of WebService learning (2) -- using JDK to develop webservice 1, Development means of WebService When using Java to develop web services, you can use the following two development methods 1. Development with JDK (version 1.6 and above) 2. Develop with CXF framework (in work) 2, Using JDK to develop WebService 2.1 develop WebService s ...

1 General Visitor pattern is a behavior pattern, which is not commonly used. It can separate the algorithmic logic acting on the object from the object itself. 2 visitor mode When we need to operate on a group of similar types of objects, we can maintain the operation logic within each object separately, but this violates the principle of singl ...

brief introduction java is remarkable in the world with its object-oriented nature and has developed vigorously.During the development of the language, in order to make the java language more concise and convenient to use, JDK is also constantly improving. Today, this article introduces the local variable type var introduced in JDK10. Why do we ...

Series of Java Concurrent Programming Articles Java Concurrent Programming Actual 01 Bug Source for Concurrent ProgrammingJava Concurrent Programming Practice 02 How Java Solves Visibility and Orderliness ProblemsJava Concurrent Programming Actual 03 Mutual Exclusion Lock Solves Atomic Problems premise In the final example of the third article, ...

Catalog What is ELKB Building ELKB system Problems to be noticed during construction What is ELKB ELKB is a popular solution for log system, which is composed by a set of components. This set of components are ElasticSearch, LogStash, Kibana and FileBeat. The functions of each component are as follows: Elastic search (es): Based on Apa ...

The framework is to leave the complex to itself, the simple to coden, as simple as writing hello world When developing Spring AOP programs in the early years, aop was configured with xml files (now xml is not popular, annotation @ EnableAspectJAutoProxy is popular), and then framework parsing, For example: How is this configuration resolved, ...

1. First configure the jdk Choose Preferences---- Find the location of your own jdk 2. Configure Tomcat window-----preferences------- Find your own tomcat location 3. Right click the project, build path -------- > configure build path   4. Import log4j-1.2.14.jar Right click log4j-1.2.14.jar file build path ----- > add to build p ...

Iterator interface, translated into Chinese is iterator The concept of iterator is generally explained as follows: There are many collections in java. There are various internal storage methods and different ways to get them. Can there be a general way to get them? This is similar to for loop traversal, General method of obtaining: before takin ...