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1, Installing Nginx under Centos Reference documents If the machine installs Nginx for the first time, you need to set the software package warehouse of Nginx before installing Nginx, and then install and update Nginx through the warehouse Install some pre required configurations yum install yum-utils Set the yum warehouse in / etc / ...

HelloSpring 1. Create spring-02-hellospring 2. Add Hello entity class public class Hello { private String str; public String getStr() { return str; } public void setStr(String str) { this.str = str; } @Override public String toString() { return "Hello{" + "str='" + str + ...

Handler parsing in Android Understanding Handler 1. What is a Handler Handler is a very important component of android messaging processing mechanism. It is often used by working threads to update UI threads and deliver messages, so as to realize the communication between threads. 2. Why use Handle Multithreading is often involved in our ...

Exception Basic concepts In the Java language, abnormal conditions occurring in program execution are called "exceptions". (syntax and logic errors in the development process are not exceptions) Abnormal events during execution can be divided into two categories: Error: a serious problem that the Java virtual machine cannot solve. ...

It should have been updated yesterday, but when using the browser to access the web port of the server's RabbitMQ, chrome shows that it is not a private link and does not allow you to log in to the Edge. Baidu has found many problems and still can't solve them. The reason is that the server doesn't install SSL certificate and uses ip directly t ...

1, Introduction to HashMap HashMap is one of our commonly used collection frameworks. The underlying implementation is array + linked list + red black tree. The elements are out of order, that is, the storage order is not necessarily in the order of addition. Synchronization is not supported, that is, the thread is unsafe. 2, Key parameters o ...

Chapter IV object oriented programming 1 object oriented and process oriented Both of them are a kind of thought, and object-oriented is relative to process oriented. Process oriented emphasizes the functional behavior, taking the function as the smallest object and considering how to do it. Object oriented, encapsulating functions into obje ...

Students who participate in the blue bridge cup can pay attention to the blogger. The blogger is also preparing the Blue Bridge Cup and can brush questions with the blogger's blog. Blue Bridge Cup My AcWing The title and pictures are from the counseling class of group ab of Blue Bridge Cup C + + enumeration Enumeration, as the name su ...

SpringBoot-21-Mybatis multiple data sources As we mentioned earlier, there are two ways to generate Mybatis Code: Mybatis Genenrator Mybatis code generation Mybtais Plus MyBatisPlus code generation The JdbcTemplate and spring boot data operation databases were also introduced earlier JdbcTemplate multi data source configuration Spring ...

catalogue 1, Basic thread usage 1. Two ways to create threads 2. Thread application case 1 - inherit thread class 3. Thread application case - Implementation of Runnable interface 4. Thread application case - multithreaded execution 5. How do threads understand 2, The difference between inheriting thread and implementing Runnable 1. Cod ...