[12c] learn how to install Oracle Enterprise Manager Cloud Control 12c in detail

1 software environment Oracle Linux 6.9 Oracle Enterprise Manager Cloud Control 12.1.0.4 Oracle 11.2.0.3 2 software preparation 1) Download EM database template https://www.oracle.com/enterprise-manager/downloads/cloud-control-downloads.html 2) Download Oracle Enterprise Manager Cloud Control 12.1.0.4 https://www.oracle.com/enterprise- ...

Posted by jtravis on Wed, 27 May 2020 04:52:51 -0700

Design and implementation of self defined persistent layer framework

Traditional jdbc Code: package com; import java.sql.*; /** * @author liuyj * @Title: JdbcTest * @create 2020-05-27 17:31 * @ProjectName algorithm-Exercise * @Description: TODO */ public class JdbcTest { public static void main(String[] args) { Connection connection=null; PreparedStatement preparedStatement=null; ...

Posted by mraiur on Wed, 27 May 2020 04:46:12 -0700

What are the principles behind Java generics?

Yunqi information:[ Click to see more industry information]Here you can find the first-hand cloud information of different industries. What are you waiting for? Come on! The main content of this section is the application of generics in java. Through this section, you can better understand generics and what is the concept of generics type erasu ...

Posted by ravi.kinjarapu on Wed, 27 May 2020 01:53:39 -0700

What is layered jar in Spring Boot 2.3

background In our actual production containerization deployment process, we often encounter the situation that the Docker image is large and the deployment and release are slow There are three main factors that affect the image size of docker: The size of the underlying mirror. Try to choose Apache as the basic image to reduce the built-in sof ...

Posted by mattr on Wed, 27 May 2020 01:43:37 -0700

Linux system CentOS 6.9 x64 configures jdk and MySQL 8.0 environment and grants MySQL remote access

Blogger server version and installed jdk and mysql versions: System: CentOS 6.9 jdk: jdk1.8_221 MySQL: mysql8.0.20 Relevant files needed in the configuration process (click to download from Baidu cloud): jdk: jdk-8u221-linux-x64.tar.gz (extraction code: kkp7) mysql: mysql-8.0.20-1.el6.x86_64.rpm-bundle.tar (extraction code: 0pvh) Softwar ...

Posted by daydreamer on Tue, 26 May 2020 23:56:40 -0700

@The RequestBody parameter has been read. Why?

I don't know if you check the user's allergy. If you don't check, the user belongs to some attack scripts, then our service will be forced! So we first need to read the user's data through the filter for safety verification, which involves an action, that is, we need to read the user's data in the filter for verification, and then release it af ...

Posted by wilorichie on Tue, 26 May 2020 19:27:13 -0700

Looking at this interesting example, you know multithreaded synchronization in seconds

Catalog Write before Case of movie tickets Example of a single thread From single threaded to multithreaded Examples of problematic multithreading Thread synchronization issues Example of ensuring thread synchronization Write at the end Write before Write down the technical concepts in the form of words, clarify the logic and deepen the ...

Posted by lavender on Tue, 26 May 2020 19:09:11 -0700

MyBatis code generator - based on Maven plug-in

MBG is the official code generator of MyBatis. MBG can automatically generate entity classes, Mapper interfaces and corresponding XML files, which can reduce the workload of developers to a certain extent. This paper introduces how to use MBG Maven plug-in. 1, In pom files, dependency packages and plug-ins are introduced. <dependency ...

Posted by WormTongue on Tue, 26 May 2020 10:01:20 -0700

Java creates SmartArt graphics in PPT and reads text in SmartArt graphics

1, Overview and environmental preparation SmartArt graphics can express the logical relationship between content and viewpoint through different layout and combination of text and graphics, which can quickly and effectively convey the intention and information of designers. This visual representation of graphic expression is commonly used in PP ...

Posted by FezEvils on Tue, 26 May 2020 09:18:31 -0700

Learn a design pattern every day: the synthesis pattern of structural pattern

1, Basic concepts The composition pattern belongs to the structural pattern of objects, sometimes called "part whole" pattern. The composition pattern organizes objects into a tree structure, which can be used to describe the relationship between the whole and the part. The composition mode enables the client to treat simple elements ...

Posted by dukeu03 on Tue, 26 May 2020 04:14:02 -0700