CentOS7 installation configuration mongodb3.2

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 ...

Posted by Collin on Mon, 20 Jul 2020 18:21:42 +0200

java annotations are easy to use

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 ...

Posted by gotit on Mon, 20 Jul 2020 16:23:01 +0200

Kids learn Java (6): encapsulation

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 ...

Posted by Japher on Sun, 19 Jul 2020 17:48:11 +0200

Several methods to find the maximum and minimum values in an integer array

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 ...

Posted by gmp on Sun, 19 Jul 2020 16:30:03 +0200

SpringBoot implements multiple data source configuration

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 ...

Posted by AtomicRax on Mon, 20 Jul 2020 18:01:36 +0200