Chapter 1 spring basics and chapter 1 spring Basics

Chapter 1 spring basics and chapter 1 spring Basics

Since the company developed and used spring boot, it began to learn spring boot. This series is mainly based on spring boot practices.

1.1 set up the spring environment and configure maven as follows:

<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. antsoldier. chapter01 </groupId> <artifactId> springBoot </artifactId> <version> 0.0.1-SNAPSHOT </version> <properties> <org. springframework-version> 4.1.5.RELEASE </org. springframework-version> </properties> <dependencies> <dependency> <groupId> org. springframework </groupId> <artifactId> spring-context </artifactId> <version >$ {org. springframework-version }</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId> org. apache. maven. plugins </groupId> <artifactId> maven-compiler-plugin </artifactId> <version> 2.3.1 </version> <configuration> <source> 1.7 </source> <target> 1.7 </target> <span> View Code
 
 
 
(2) Use @ Service to introduce the spring container object class to the container, and @ Autowired automatically injects the object.
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(3) Main configuration class
@ Configuration // indicates that this is a main Configuration class.
@ ComponentScan ("com. antsoldier. service") // indicates the package to be scanned by spring.
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(4) run the program
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1.4 spring 4.x does not recommend using configuration files for configuration, but also Java configuration.
Java Configuration is implemented through @ Configuration and @ Bean:
@ Configuration declares that the current class is a Configuration class, which is equivalent to a Spring Configuration XML
@ Bean annotation in the method, declare that the return value of the current method is a bean
A simple example is as follows:
Java configuration class:
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Test main class
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1.5 spring AOP example
@ Aspect declare a plane
@ After @ Before @ Around defines advice. You can directly use the interception rule (cut point) as a parameter.
@ After @ Before @ Around: the interception rule of the parameter is point)
Modify the pom file to add a new dependency
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Compile the classes intercepted by the usage rules
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Write cut plane
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Write the main configuration class
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Main execution Method
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Aspect programming reference: http://www.cnblogs.com/xrq730/p/4919025.html