SpringBoot document notes

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链接： https://github.com/DFX339/SpringBootDocumentNotes.git

Create a example

pom.xml

Controller:

The defferent between @RestController  and  @Controller:

@Controller  could return jsp、html or   (add @ResponseBody to return json)json

@RestController just could return json.

@RestController  = @Controller +@ResponseBody

@EnableAutoConfiguration: aim to tell springboot how to configure spring.

Main method: to auto starting spring,auto starting the tomcat web server.

When you see that your demo is successful.

@SpringBootApplication on you main class.

Locate you  main class above other clasese package.

@SpringBootApplication = @EnableAutoConfiguration +@ComponentScan

Main class demo  with use the @SpringBootApplication

@Configuration: load one class

@Import : load one special class

@ComponentScan: load all spring conponent.

@Configuration to configure xml

@Configuration :Recommend this annotations

@EnableAutoConfiguration ： use this could auto configuration

@EnableAutoConfiguration ： to Ingnore some class

@ComponentScan ： find  you beans

@Autowired： inject object by constructor.

Structrue codes to use @ComponentScan:

@Repository:always use to annotation the Dao

Default configure file name. application.properties

@SpringBootApplication = @EnableAutoConfiguration + @Configuration + @ComponentScan

Use @EnableAutoConfiguration @Configuration @Import to annotation main class instead of @SpringBootApplication   demo.

@Import : point at some specific classes.

@Component: point at all class.

Springboot-devtools: A powerrful dependency!

Disable to cache in default.

If some files be modified ,the springboot- devtool will restart this program auto.

Restart detailed analysis: springboot worked with two classloaders.

Restart logs: you can figure out it by configuring in application.properties.

spring.devtools.restart.log-condition-evaluation-delta=false

Eclude some files ,project would not to restart when they are changed

Springboot devtool default to start,you can stop it by modifying the System param.

Trigger a brower refresh. (auto)

Use the configure file name definitied by self. Composed with –spring.config.name=Xxxxxx

Use specific configuration

@EnableConfigurationProperties：all class be annotated by @ConfigurationProperties

Use @Valitaded  anotations to validate attributes

Ouput the log fiiles

Springboot support tomcat/jetty ,the default port is 8080

Springboot servlet

Use springboot servlet

Configure springboot servlet in application.properties

Demo in springboot servlet

Modify the port in tomcat

Connect to mysql database；

Tomcat connect pool

Entity Class use @Entity annotations

JOOQ: java object orentied query

Springboot user redis

Connect redis

Springboot provides lots of databases,sql or nosql ,all of those will have XXXTemplate instance to operate.

Springboot cache use demo:

JMS: java message service

JMS-ActionMq:use demo:

JMS send meassages:

RabbitMQ

Send mesages:

Receive messages:

Use restTemplate by RestTemplateBuilder

Use webClient by WebClientBuilder

Springboot use quartz scheduler

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