Programmer Group

1 Preface Hi, everyone, this is senior Dan Cheng. Today, I'd like to introduce you to a python web project (currently demo, under development.) Parking lot management system based on big data analysis (currently demo, under development.) You can use it for graduation design 2 system effect 3 Preface The current project is a park ...

#1, Basic use 1.mybatis-config.xml template <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.jianan.mapper.xxx"> </mapper> 2. Top level elements The real power of MyBatis lies in its st ...

1.mybatis-config.xml template <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> </configuration> 2. properties Use example These properties can be set in the child elements of the propertie ...

catalogue Programming transaction control related objects Three objects of programming transaction control   Declarative transaction control based on XML Implementation of declarative transaction control Configuring declarative transaction control using annotations Programming transaction control related objects Three objects of pr ...

preface Powerful functions in nginx, such as rewrite and proxy_pass is inseparable from his matching rules. Understand nginx and learn advanced nginx usage. You must know all kinds of matching priorities and matching syntax 1, nginx location 1. Syntax rules and priorities location [=|~|~*|!~|!~*|^~] /uri/ { ... } = ...

High Availability HA (High Availability) is one of the factors that must be considered in the architecture design of distributed systems. It usually refers to reducing the time when the system cannot provide services through design. Assuming that the system can always provide services, we say that the availability of the system is 100%. If the ...

What is Bridge mode concept The definition of bridging pattern is as follows: * * separate abstraction from implementation so that they can change independently** This concept is very abstract, which means to separate the abstract part from the implementation part, so as to reduce the coupling between the abstract part and the implementation ...

Spring Security has enabled CSRF defense by default. What is CSRF CSRF is a browser cross site forged request. Hackers can induce users to perform some unexpected behaviors, which allows attackers to partially bypass the homologous strategy. For example, after the user logs in to system A, the user can modify his mailbox, and then the browse ...

Let's start with two concepts: process and thread            Process: a running program, which is an independent unit of the system for resource allocation and call. Each process has its own memory space and system resources.          Thread: a single sequent ...

2.7.11 script security and set set command: can be used to customize the shell environment $- variable h: hashall, after the option is turned on, the Shell will hash the path where the command is located to avoid querying every time. Turn off the H option through set +h i: Interactive comments, including this option, indicates that the curre ...