Spring / Spring Boot

framework

Enterprise Framework for Web Development with Java.

Getting Started

Create a new Spring Boot Project

Generate a new Spring project with Spring Initializr.

Create a new Spring Boot Project from the CLI

mkdir myapp && cd myapp
# generate new spring project from the command line
curl https://start.spring.io/starter.tgz \
         -d artifactId=myapp \
         -d name=myapp \
         -d 'description=App description' \
         -d dependencies=devtools,configuration-processor,web |
         tar -xzvf -

Application Configuration

Global configuration can be done in application.properties files or YAML files.

## change application port
server.port=8081
## debug configuration
debug=true
trace=true
# troubleshoot authentication
logging.level.springframework.security=debug
## misc
# enable actuator for all endpoints
management.endpoints.web.exposure.include=*

You can also override configurationo through environment variables. I.e LOGGING_LEVEL_COM_EXAMPLE_PACKAGE

ConfigurationProperties class

Allows to read in properties under the prefix into a class.

@ConfigurationProperties(prefix="mail")
class MyProperties {
    private String hostName;
    private int port;
    private String from;
}

Security

JWT io Library

• use parseClaimsJwt instead of parse. See source

Further Resources

• REST with Spring

Databases

MongoDB

Spring Data MongoDB Docs: https://docs.spring.io/spring-data/mongodb/docs/current/reference/html/#mongodb-template-query.criteria