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1. Basic concepts of Spring MVC 1.1 On Three-tier Architecture and MVC 1.1.1 Three-tier Architecture The development of server-side programs, generally based on two forms, a C/S architecture program, a B/S architecture program. The use of Java language is basically the development of B/S architect ...

  pom.xml <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.woniu</groupId> <artifactId>bkee ...

Warehouse Address: spring-boot-learningWelcome to star and fork, give some encouragement to the author Preface Mybatis was difficult to use initially, requiring various configuration files, entity classes, Dao layer mapping associations, and a large number of other configurations. mybatis-spring-boot-starter is Spring Boot+ Mybatis, which can b ...

Questions: In one-to-many, when we have a user, it has 100 accounts. When inquiring the user, the account information under the user is when to use and when to query again. When querying an account, the user information of the account should be queried again as the account is queried. What is lazy loading Delayed loading Queries are initiated o ...

Common Network Request Patterns in Android HttpUrlConnection 1.get request 2.post request 3. Download Web Video/Music/Pictures to SD Card I. Concept: 1.http: Hypertext Transfer Protocol (client and server), Application Layer Protocol 2.html: Hypertext Markup Language 3.xml: Extensible Markup LanguageI ...

Build a session sharing module based on spring session. Here, a redis-based cluster (Redis-5.0.3 version) is designed as a POM component, which is directly configured as dependency in the pom.xml file in order to meet the need of sharing sessions among the subsystems of the entire Internet of Things platform and facilitate the use of each subsy ...

Preface This blog mainly solves the dynamic generation of word (docx format) in java background, and converts word into pdf and adds watermarking. Reflection The requirement of the project is to export pdf with watermarking. The form style is still a bit complicated. It was considered that itextpdf was used to generate pdf based on html, but ...

This blog is the tenth to introduce Drawable. Unlike previous blogs, this blog introduces two Drawables at a time. The reason for this is that both Drawables use shape tags in xml. There's a little bit in common. (Shapes are specified by the root label shape) Let's take a look at shape Drawable first. Still the old rule, first look at the sh ...

Introduction to basic concepts Namespace XML namespaces provide a way to avoid element naming conflicts. For example, there is a student named Lin Xiaoming in School A and a student named Lin Xiaoming in School B. How can we identify these two students with the same name? Namespace will come in handy at this time. A and B can then be cons ...

1. Prepare the environment (JDK and Hadoop) $ tar -zxf hadoop-2.5.2.tar.gz -C /opt/app/ // Uninstall java from Linux, install jdk1.8, hive only supports version 1.7 or above $ rpm -qa|grep java $ rpm -e --nodeps java Various documents 2. Environment Configuration Configure your environment with etc/hadoop/hadoop-env.sh in ...