Spring Boot配置文件详解

程序员文章站 2022-07-15 08:06:59

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一新建项目config-test

二编写pom.xml

<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/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
      <groupId>org.crazyit.cloud</groupId>
      <artifactId>config-test</artifactId>
      <version>0.0.1-SNAPSHOT</version>
      
      <dependencies>
            <dependency>
                  <groupId>org.springframework.boot</groupId>
                  <artifactId>spring-boot-starter-web</artifactId>
                  <version>1.5.7.RELEASE</version>
            </dependency>
            <dependency>
                  <groupId>org.springframework.boot</groupId>
                  <artifactId>spring-boot-devtools</artifactId>
                  <version>1.5.7.RELEASE</version>
            </dependency>           
      </dependencies>
      
</project>

三编写启动类

package org.crazyit.cloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class ConfigApp {

    public static void main(String[] args) {
        SpringApplication.run(ConfigApp.class, args);
    }

}

四配置文件的4个路径

访问优先级为1,2,3,4

五编写控制类

package org.crazyit.cloud;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class MyController {
    
    @Autowired
    private ApplicationContext ctx;

    @GetMapping("/prop")
    @ResponseBody
    public String getName() {
        System.out.println("hello world");
        return ctx.getEnvironment().getProperty("test.user.name");
    }
}

六测试

七新建一个配置文件abc.properties

test.user.name = crazyit

八新建MyconfigApp启动类

package org.crazyit.cloud;

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;

@SpringBootApplication
public class MyConfigApp {

    public static void main(String[] args) {
        new SpringApplicationBuilder(MyConfigApp.class).properties(
                "spring.config.location=classpath:/abc.properties").run(args);
    }
}

九启动并测试

十新建yml配置文件

test:
  user:
    name: angus

十一启动并测试

十二修改yml配置

spring:
  profiles: linux
test:
  user:
    name: angus
---
spring:
  profiles: windows
test:
  user:
    name: crazyit1

十三新建一个启动类

package org.crazyit.cloud;

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;

@SpringBootApplication
public class ProfileTest {

    public static void main(String[] args) {
        new SpringApplicationBuilder(MyConfigApp.class).properties(
                "spring.profiles.active=windows", "server.port=9999").run(args);
    }

}

十四测试