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Authentication and Authorization authentication The main thing to do to certify in the program is to find out who the visitor is and has he registered with our system? Is he a user in our system? If so, is this user blacklisted by us? This is what certification does. For example: To enter a scenic spot, you have to buy a ticket first. If y ...

servlet Before understanding the process of dispatcher servlet, we should first understand the technology of servlet. In a narrow sense, servlet is just an interface. In a broad sense, it is a specification. In traditional Java Web projects, the doGet and doPost methods are rewritten by inheriting HttpServlet (realizing the service interface ...

Catalogue of series articles Tip: you can add the directories of all articles in the series here. You need to add the directories manually For example, the first chapter is the use of pandas, an introduction to Python machine learning Tip: after writing the article, the directory can be generated automatically. For how to generate it, pleas ...

1. Introduction During the development of the company's projects, we often encounter the following scenarios: 1. When we call a third-party interface or method, we don't need to wait for the method to return to execute other logic. At this time, if the response time is too long, it will greatly affect the execution efficiency of the progra ...

1. This article comes from Silicon Valley and is not suitable for beginners. 2. Come back with a certain foundation. Part I 1, Understanding part 1. Introduction to spring security Let's put it this way. It's a very boastful security framework. It mainly does two things: Authentication and Authorization 2. History Its history, you can sea ...

Java loop structure - for, while and do...while    Sequential program statements can only be executed once. Recommended distributed architecture Source address      If you want to perform the same operation multiple times, you need to use a loop structure. There are three main loop structures in Java: while   loopdo&he ...

Java objects and classes Java as an object-oriented language. The following basic concepts are supported: polymorphicinheritencapsulationabstractclassobjectexamplemethodheavy load In this section, we focus on the concepts of objects and classes. Recommended distributed architecture Source address source   Object: an object is an instance of ...

preface Requirement description Use sharding JDBC to complete the horizontal division of the order table, and quickly experience the use method of sharding JDBC through the development of quick start program. Create two tables manually, t_order_1 and t_order_2. These two tables are the tables after splitting the order table. Insert d ...

The previous blogs have studied the principles and practical tips of SpringBoot. The next few blogs, I would like to call it the integration of all layers of SpringBoot to deal with the complete development task, nothing more than the integration of database and persistence layer and the customized integration of Spring MVC. Today's Blog will i ...

1, Introduce the history of log development jdk1.3 System.out.println("") tracing It can only be used for debugging when writing code. After online deployment, it is difficult to locate the problem and find the problem. System.out.println("") will only print logs on the console. After the logs are overstocked, the historica ...