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OpeningWhen reading the open source code framework, I often go to the application scenario of Proxy dynamic Proxy and take the time to study it.Analyze the calling process with the help of Proxy demo and decompile dynamic Proxy code.With the help of the source code of Proxy dynamic Proxy class, the generation process of dynamic class is analyze ...

Constructor and prototype object 1. Constructor Constructor: the constructor is mainly used to create an object and assign initial values to the members of the object. function Person(name, age) { this.name = name; this.age = age; } var p1 = new Person('Zhang San', 18); var p2 = new Person('Li Si', 19); console.log(p1.name); // Outp ...

This article will summarize the time series prediction methods, introduce all methods in categories and provide corresponding python code examples. The following is the list of methods to be introduced in this article:1. Time series prediction using smoothing techniqueexponential smoothing Holt winters method2. Univariate time series prediction ...

As the Secretary of the League branch and the monitor, there are too many materials and data in the whole class. Although office software can solve many data processing problems, learning the major of programming itself should reflect the level of the major. In addition, it is necessary to count which students in the class buy which books and u ...

Mybatis learning - dynamic SQL What is dynamic SQL Dynamic SQL is to generate different SQL statements according to different conditions Dynamic SQL is similar to JSTL or any text processor based on XML like languages. In previous versions of MyBatis, it took time to understand a large number of elements. With the powerful expression base ...

For Java developers, no one dares to underestimate the importance of Spring Boot. Now when you go out for an interview, no matter how small a company or project, you have to talk about Spring Boot and micro services. If you can't chew it down, you may miss the big factory. If you are proficient in the principle and implementation of Spring Boo ...

I What is reflection Reflection is a dynamic mechanism in java, which allows us to determine the instantiation of objects and the call of methods during the running of programs, Property operation, etc. The flexibility of the program is greatly improved, but it also brings more resource overhead and lower cost Operation efficiency. ...

The file upload of Spring MVC framework is based on the Commons fileUpload component, which is further encapsulated, which simplifies the code implementation of file upload and eliminates the programming differences of different upload components. MultipartResolver interface It is very easy to upload files in Spring MVC. It provides dire ...

1, Overview of design patterns 1.1 introduction to design mode Design pattern is the useful experience that programmers have summed up in the face of similar software engineering design problems. Pattern is not code, but the general knowledge of a certain kind of problems With solutions, design patterns represent best practices. These so ...

catalogue 1, Three paradigms of database 1. First paradigm (ensure that each column remains atomic) 2. Second normal form (ensure that every column in the table is related to the primary key) 3. The third paradigm (ensure that each column is directly related to the primary key column, not indirectly) 2, Tablespace 1. Relationship with c ...