Spring boot — Argument and Profile

Argument:

• optional argument

java -jar xxx.jar --arg1=abc

• non optional argument

java -jar xxx.jar abc def

• system properties

java -jar -D abc=def xxx.jar --arg1=abc

prepare: application.properties

optional1=xxxx

code : Using

• annotation Value(“${optional1}”) to get optional argument
  (need pre-define in application.properties)
• System.getProperty(“systemProperty1”) //get -DsystemProperty1=$value

package com.anson.demo.controllers;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.HashMap;
@RestController
public class HelloWorldController {
   @Value("${optional1}")
   String optional1;
   @GetMapping("/test")
   public Object test(){
      HashMap<String, String > a = new HashMap<>();
      a.put("optional1", optional1);
      a.put("systemProperty1", System.getProperty("systemProperty1"));
      return a;
   }
   
}

run

java -jar  -DsystemProperty1=vvvv build/libs/demo-0.0.1-SNAPSHOT.jar --optional1=bbb

will get in api

{ 
  "optional1": "bbb",
  "systemProperty1": "vvvv"
}

using ApplicationArguments to get arguments (no need predefine)

@Resource
ApplicationArguments applicationArguments;
@GetMapping("/test")
public Object test(){
   HashMap<String, String > a = new HashMap<>();
   //option1
   a.put("optional1", optional1);
   a.put("systemProperty1", System.getProperty("systemProperty1"));
   a.put("applicationArguments.getNonOptionArgs", applicationArguments.getNonOptionArgs().toString());
   a.put("applicationArguments.getOptionNames", applicationArguments.getOptionNames().toString());
   applicationArguments.getOptionNames().forEach(name -> {
      a.put("applicationArguments.getSourceArgs:"+name, applicationArguments.getOptionValues(name).toString());
   });
   a.put("applicationArguments.getSourceArgs", applicationArguments.getSourceArgs().toString());
   return a;
}

Profile:

create

application.properties (common setting)

spring.profiles.active=dev  //default 
optional1=aaaaa

application-dev.properties

optional2=dev

application-prod.properties

optional2=prod

code

@Value("${optional1}")
String optional1; //get value from application.properties
//get value from application-$active.properties
@Value("${optional2}")
String optional2;

run

java -jar  build/libs/demo-0.0.1-SNAPSHOT.jar --spring.profiles.active=prod