A brief analysis of SpringBoot and environment construction process

What is SpringBoot

Spring Boot is a new framework provided by the Pivotal team. It is designed to simplify the initial construction and development process of new Spring applications. The framework uses a specific way to configure it, so that developers no longer need to define boilerplate configurations.

SpringBoot Features

• Spring projects running independently
• Spring Boot can be run as a jar package. When running a Spring Boot project, we only need to run it through the Java -jar xx.jar class. Very convenient.
• Embed Servlet container
• Spring Boot can be built-in Tomcat so we don't need to deploy projects as war packages.
• Provide starter to simplify Maven configuration
• Using Spring or SpringMVC we need to add a large number of dependencies, and many of these dependencies are fixed. Here, Spring Boot can help us simplify Maven configuration through starter.
• Automatically configure Spring
• Quasi-production application monitoring
• Out of the box, no code generation, no XML configuration required.
• Provides production-ready features such as metrics, health checks and external configurations
  

Development steps

Create a Maven Project

• new Project--->Maven--->Maven Project
• Check Create a simple project, next

• Note: Spring Boot can be run as a jar package, so the packaging method here can be a jar
• Finsih
• Add the following folders and application.properties in resource

pom.xml file configuration

Add dependencies

 <?xml version="1.0" encoding="UTF-8"?><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.tl</groupId> <artifactId>springboot</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>springboot</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.9.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build></project>

• After the build is completed, the corresponding jar package has been added.
• Right-click on the project: Maven---->Update Project, refresh the project, the error disappears
• Create entry function under com.tl.app package

 package com.tl.app;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.EnableAutoConfiguration;import org.springframework.context.annotation.ComponentScan;@EnableAutoConfiguration@ComponentScan(basePackages={"com.tl"})public class Appstart { public static void main(String[] args){ SpringApplication.run(Appstart.class,args); }}

Create Controller

 package com.tl.app;import java.util.HashMap;import java.util.Map;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;@org.springframework.steretype.Controllerpublic class Controller { @RequestMapping("/index") @ResponseBody public Map<String,String> index(){ Map map = new HashMap<String,String>(); map.put("Wukong","is a monkey"); map.put("Lu Ban","is a hero"); return map; }}

Execute the entry function

Tomcat has been started, port 8080

Access Controller

Summarize

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