Table of Contents
Springboot failed to start specified profiles
Everything has accidents
Compare other projects
springboot Profiles, configuration files Loading priority
Case code
Home Java javaTutorial How to solve the problem of startup failure of specified profiles in springboot

How to solve the problem of startup failure of specified profiles in springboot

May 11, 2023 pm 06:46 PM
springboot profiles

    Springboot failed to start specified profiles

    Normally, the jar package that starts springboot can be read through –spring.profiles.active=dev. application-dev.yml configuration file information, start it

    Everything has accidents

    This startup is very strange. Entering this startup environment parameter still has no effect,

    How to solve the problem of startup failure of specified profiles in springboot

    It’s so scary, it’s so unexpected!

    Instead of reading application-dev.yml, it reads the default application.yml file

    However, using the startup parameters of jvm: java -jar -Dspring.profiles.active=dev, it can be started, which proves that the dev configuration file is valid

    Compare other projects

    Entrance of application Class discovery:

    public static void main(String[] args){
    	SpringApplication.run(Application.class,args);
    }
    Copy after login

    When calling the run method, no args were passed in!

    Read the source code and find out, pass in the startup parameters, then parse the incoming parameters, and set the properties

    Note:

    Be careful, the startup code needs to pass in the startup parameters!!! Only then can the startup parameters be entered to take effect at startup

    springboot Profiles, configuration files Loading priority

    SpringBoot allows us to have multiple configuration files, and then dynamically load the corresponding configuration file based on conditions when the project starts.

    There are now three configurations, one default configuration file (application.properties: because it is the name specified by SpringBoot, so it is called the default configuration file), and two specified environment configuration files (application-prod.properties and application-dev .properties: related to the corresponding environment, so they are called designated environment configuration files)

    application-dev.properties
    Copy after login

    Simulation development configuration information

    person.name=ZhangSan
    person.age=18
    Copy after login

    application-prod.properties

    Simulate production configuration information

    person.name=LiSi
    person.age=19
    Copy after login

    application.properties

    Just specify the port number of a service and the configuration file that needs to be loaded when the project starts, SpringBoot will Automatically match application-{spring.profiles.active}.properties, and then find the application-dev.properties configuration file

    server.port=8080
    spring.profiles.active=dev #我们可以指定SpringBoot在启动时加载那个对应的配置文件
    Copy after login

    Case code

    Create a case Person class and let it When instantiated, read information from the configuration file, read the rule: person.{property name}, create a new instance of Person, and add it to the IOC container.

    Create a get request and return our Person instance. Let’s see if the perosn attribute value can load the corresponding configuration file according to the spring.profiles.active attribute we specified in the application.properties configuration file. Person Is the value in the instance the expected value?

    @ConfigurationProperties(prefix = "person") //初始化的时候从配置文件中读取person.{属性名}的信息赋值给当前对象
    @Data
    public class Person {
        private String name;
        private Integer age;
    }
     
     
     
    @Configuration //配置文件信息,将Person实例注入到IOC容器中
    public class MyConfig {
     
        @Bean
        public Person person() {
            return new Person();
        }
     
    }
    Copy after login

    @RestController //Create a get request and return our Person instance. Let’s see if the perosn attribute value can be specified in the spring configuration file according to the application.properties configuration file. The .profiles.active attribute loads the corresponding configuration file. Is the value in the Person instance the expected value?

    @RequestMapping("/user")
    public class PersonController {
     
        @Autowired
        private Person person;
     
        @GetMapping
        public Person getPerson() {
            return person;
        }
    }
    Copy after login

    When the project is run, visit http://localhost:8080/user and the result is returned:

    {"name":"ZhangSan","age":18}

    Change the value of spring.profiles.active in application.properties to prod and request access to http: //localhost:8080/user, return result:

    {"name":"LiSi","age":19}

    In addition, if we have already installed the project Packaged into a jar, you can specify the value of spring.profiles.active by assigning values ​​to parameters from the command line when starting the SpringBoot project

    java -jar .\web-02-0.0.1-SNAPSHOT.jar --spring.profiles.active=dev
    Copy after login

    Another more practical one is that SpringBoot loads application.properties and The path and priority of application.yaml (seen from the official SpringBoot documentation: https://docs.spring.io/spring-boot/docs/current/reference/html/features.html#features.external-config. application-json), loading priority:

    • application.properties and application.yaml

      under /config/{first-level subdirectory} under the directory where the jar package is located
    • application.properties and application.yaml under /config in the directory where the jar package is located

    • application.properties and application.properties under the directory where the jar package is located application.yaml

    • application.properties and application.yaml in /config under classpath

    • application.properties and application.yaml under classpath

    The scenario is: Our project has been running for a long time, and the configuration file needs to be modified due to emergencies. But we don’t dare to modify the old configuration files at will. At this time, we can put our new coordination files in a high-priority place.

    The above is the detailed content of How to solve the problem of startup failure of specified profiles in springboot. For more information, please follow other related articles on the PHP Chinese website!

    Statement of this Website
    The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

    Hot AI Tools

    Undresser.AI Undress

    Undresser.AI Undress

    AI-powered app for creating realistic nude photos

    AI Clothes Remover

    AI Clothes Remover

    Online AI tool for removing clothes from photos.

    Undress AI Tool

    Undress AI Tool

    Undress images for free

    Clothoff.io

    Clothoff.io

    AI clothes remover

    AI Hentai Generator

    AI Hentai Generator

    Generate AI Hentai for free.

    Hot Article

    R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
    2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
    Repo: How To Revive Teammates
    4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
    Hello Kitty Island Adventure: How To Get Giant Seeds
    3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

    Hot Tools

    Notepad++7.3.1

    Notepad++7.3.1

    Easy-to-use and free code editor

    SublimeText3 Chinese version

    SublimeText3 Chinese version

    Chinese version, very easy to use

    Zend Studio 13.0.1

    Zend Studio 13.0.1

    Powerful PHP integrated development environment

    Dreamweaver CS6

    Dreamweaver CS6

    Visual web development tools

    SublimeText3 Mac version

    SublimeText3 Mac version

    God-level code editing software (SublimeText3)

    How Springboot integrates Jasypt to implement configuration file encryption How Springboot integrates Jasypt to implement configuration file encryption Jun 01, 2023 am 08:55 AM

    Introduction to Jasypt Jasypt is a java library that allows a developer to add basic encryption functionality to his/her project with minimal effort and does not require a deep understanding of how encryption works. High security for one-way and two-way encryption. , standards-based encryption technology. Encrypt passwords, text, numbers, binaries... Suitable for integration into Spring-based applications, open API, for use with any JCE provider... Add the following dependency: com.github.ulisesbocchiojasypt-spring-boot-starter2. 1.1Jasypt benefits protect our system security. Even if the code is leaked, the data source can be guaranteed.

    How to use Redis to implement distributed locks in SpringBoot How to use Redis to implement distributed locks in SpringBoot Jun 03, 2023 am 08:16 AM

    1. Redis implements distributed lock principle and why distributed locks are needed. Before talking about distributed locks, it is necessary to explain why distributed locks are needed. The opposite of distributed locks is stand-alone locks. When we write multi-threaded programs, we avoid data problems caused by operating a shared variable at the same time. We usually use a lock to mutually exclude the shared variables to ensure the correctness of the shared variables. Its scope of use is in the same process. If there are multiple processes that need to operate a shared resource at the same time, how can they be mutually exclusive? Today's business applications are usually microservice architecture, which also means that one application will deploy multiple processes. If multiple processes need to modify the same row of records in MySQL, in order to avoid dirty data caused by out-of-order operations, distribution needs to be introduced at this time. The style is locked. Want to achieve points

    How SpringBoot integrates Redisson to implement delay queue How SpringBoot integrates Redisson to implement delay queue May 30, 2023 pm 02:40 PM

    Usage scenario 1. The order was placed successfully but the payment was not made within 30 minutes. The payment timed out and the order was automatically canceled. 2. The order was signed and no evaluation was conducted for 7 days after signing. If the order times out and is not evaluated, the system defaults to a positive rating. 3. The order is placed successfully. If the merchant does not receive the order for 5 minutes, the order is cancelled. 4. The delivery times out, and push SMS reminder... For scenarios with long delays and low real-time performance, we can Use task scheduling to perform regular polling processing. For example: xxl-job Today we will pick

    How to solve the problem that springboot cannot access the file after reading it into a jar package How to solve the problem that springboot cannot access the file after reading it into a jar package Jun 03, 2023 pm 04:38 PM

    Springboot reads the file, but cannot access the latest development after packaging it into a jar package. There is a situation where springboot cannot read the file after packaging it into a jar package. The reason is that after packaging, the virtual path of the file is invalid and can only be accessed through the stream. Read. The file is under resources publicvoidtest(){Listnames=newArrayList();InputStreamReaderread=null;try{ClassPathResourceresource=newClassPathResource("name.txt");Input

    Comparison and difference analysis between SpringBoot and SpringMVC Comparison and difference analysis between SpringBoot and SpringMVC Dec 29, 2023 am 11:02 AM

    SpringBoot and SpringMVC are both commonly used frameworks in Java development, but there are some obvious differences between them. This article will explore the features and uses of these two frameworks and compare their differences. First, let's learn about SpringBoot. SpringBoot was developed by the Pivotal team to simplify the creation and deployment of applications based on the Spring framework. It provides a fast, lightweight way to build stand-alone, executable

    How SpringBoot customizes Redis to implement cache serialization How SpringBoot customizes Redis to implement cache serialization Jun 03, 2023 am 11:32 AM

    1. Customize RedisTemplate1.1, RedisAPI default serialization mechanism. The API-based Redis cache implementation uses the RedisTemplate template for data caching operations. Here, open the RedisTemplate class and view the source code information of the class. publicclassRedisTemplateextendsRedisAccessorimplementsRedisOperations, BeanClassLoaderAware{//Declare key, Various serialization methods of value, the initial value is empty @NullableprivateRedisSe

    How to implement Springboot+Mybatis-plus without using SQL statements to add multiple tables How to implement Springboot+Mybatis-plus without using SQL statements to add multiple tables Jun 02, 2023 am 11:07 AM

    When Springboot+Mybatis-plus does not use SQL statements to perform multi-table adding operations, the problems I encountered are decomposed by simulating thinking in the test environment: Create a BrandDTO object with parameters to simulate passing parameters to the background. We all know that it is extremely difficult to perform multi-table operations in Mybatis-plus. If you do not use tools such as Mybatis-plus-join, you can only configure the corresponding Mapper.xml file and configure The smelly and long ResultMap, and then write the corresponding sql statement. Although this method seems cumbersome, it is highly flexible and allows us to

    How to get the value in application.yml in springboot How to get the value in application.yml in springboot Jun 03, 2023 pm 06:43 PM

    In projects, some configuration information is often needed. This information may have different configurations in the test environment and the production environment, and may need to be modified later based on actual business conditions. We cannot hard-code these configurations in the code. It is best to write them in the configuration file. For example, you can write this information in the application.yml file. So, how to get or use this address in the code? There are 2 methods. Method 1: We can get the value corresponding to the key in the configuration file (application.yml) through the ${key} annotated with @Value. This method is suitable for situations where there are relatively few microservices. Method 2: In actual projects, When business is complicated, logic

    See all articles