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Development and operation environment: Shenzhou notebook K650D-G6D1 i5-6400 GTX950M Windows 10 professional Nginx or Apache Web server software MySQL 5.7. X database PHP7.1.0 PHPStrom 2017 PowerDesigner 16.5 Axure RP8 Prototype design drawing (recruitment application) Database table (recruitment application): recruitment application ...

Before the project, it ran well. As a result, after other related modules updated the code, the project startup reported an error 2019-12-06 08:55:13 [main] ERROR o.s.boot.SpringApplication - Application startup failed java.lang.NullPointerException: null at org.springframework.beans.factory.support.DefaultListableBeanFactory$FactoryAwareOr ...

I. prototype mode 1. What is prototype mode Clone The prototype pattern is a creation pattern. The word "prototype" indicates that there should be a template instance for the schema change. Users copy an object with consistent internal properties from the template object. This process is also called "cloning". The copied ins ...

The personal rank algorithm based on random walk evolved from Google's pageRank algorithm, which uses less, so to speak, less. As for the pageRank algorithm, I post a blog that I think is well written here pageRank algorithm reference 1. Introduction to personal rank algorithm: The data set is randomly divided into training set ...

The concept of friend What is friendship? Friend is a relationship in C + + Friendships occur between functions and classes or between classes The relationship of friends is single and cannot be transferred Usage of friends Declare friends in a class with the friend keyword A friend of a class can be another class or a concrete functio ...

I. introduce dependency <!-- xbean as<amq:connectionFactory /> -->     <dependency>         <groupId>org.apache.xbean</groupId>         <artifactId>xbean-spring</artifactId>         <version>3.16</version>     </dependency>     <dependency>         <groupId>org. ...

Runnable @FunctionalInterface public interface Runnable { /** * When an object implementing interface <code>Runnable</code> is used * to create a thread, starting the thread causes the object's * <code>run</code> method to be called in that separately executing * thread. * <p> * T ...

The starting process of nginx starts with the main() method of the nginx.c file, in which nginx performs operations such as parsing command line parameters, initializing module indexes, parsing configuration files, initializing modules, starting master, worker, and cache-related processes.This paper starts with the main () method and explains h ...

Title Description Given a string, please find out the length of the longest substring that does not contain duplicate characters. Type: "abcabcbb" Output: 3 Explanation: because the longest substring without repeating characters is "abc", its length is 3. Enter: "bbbbb" Output: 1 Explanation: b ...

This may be a problem that is easy to be ignored. First, we need to be clear:In MySQL, AND takes precedence over OR. That is to say, without the limitation of parentheses (), the AND statement is always executed first AND then the OR statement.For example: select * from table where condition1 and condition2 or condition3 Equivalent to select ...