Programmer Think

1. Download Dependent Packages yum -y install wget 2. Create a file directory mkdir -p /app/install mkdir–p /app/data/mongodb mkdir–p /app/log/mongodb 3. Download mongodb cd /app/install wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.2.16.tgz tar zxvf mongodb-linux-x86_64-3.2.16 ...

java annotations are easy to use Annotations have been used throughout the development process, and today I finally want to look at the implementation of annotations.Drive directly // Custom Notes // Annotation has been implemented here // Note that comments are only valid in the form of reflection calls @Retention(va ...

Object oriented has three characteristics: Encapsulation, Inheritance and Polymorphism. This section covers encapsulation. Procedure 1 class Woman { private String name; private int age; private Man husband; public void setName(String name) { this.name = name; } public String getName() { return ...

In integer arrays, we need to get the maximum and minimum values of array elements from them: Method 1: Sort using Array first, then from the sorted array, the first element is the smallest and the last element is the largest.   public static int FindMaxNumber(params int[] stringValue) { Array.Sort(stringV ...

Spring boot for multi data source configuration springBoot implements the configuration of multiple data sources application.properties Configure two data sources in spring.datasource.primary.url=jdbc:mysql://localhost:3306/test1 spring.datasource.primary.username=root spring.datasource.primary.password=root spring.datasource.primary.driv ...