springboot 控制台程序读取配置文件（原创）

首先新建一个springboot项目，此处省略。

1.新建一个application.properties

person.name=kevin
person.age=6
person.sex=male

2.新建一个类，自动读取对应字段的值

有两种方式，

第一种

package cn.wq;import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;@Configuration
@EnableConfigurationProperties
@PropertySource("classpath:application.properties")
public class Person2Properties {@Value("${person.name}")private String name;@Value("${person.age}")private String age;@Value("${person.sex}")private String sex;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAge() {return age;}public void setAge(String age) {this.age = age;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}
}

第二种

package cn.wq;import org.springframework.boot.context.properties.ConfigurationProperties;@ConfigurationProperties(prefix = "person") /*如果使用prefix，则属性名中不能使用@Value来注解,但是必须在spring启动时，添加注解 @EnableConfigurationProperties(PersonProperties.class)*/
public class PersonProperties {private String name;private String age;private String sex;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAge() {return age;}public void setAge(String age) {this.age = age;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}
}

3.启动主程序：

package cn.wq;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Configuration;@Configuration
@EnableConfigurationProperties(PersonProperties.class)
@SpringBootApplication
public class Application2  implements CommandLineRunner {public static void main(String[] args){SpringApplication.run(Application2.class,args);}@AutowiredPersonProperties personProperties;@AutowiredPerson2Properties person2Properties;@Overridepublic void run(String... args) {System.out.println("程序实际上的入口在这里。");System.out.println("name:"+personProperties.getName());System.out.println("age:"+personProperties.getAge());System.out.println("sex:"+personProperties.getSex());System.out.println("2-name:"+person2Properties.getName());System.out.println("2-age:"+person2Properties.getAge());System.out.println("2-sex:"+person2Properties.getSex());}
}

4.运行，输出结果：

  .   ____          _            __ _ _/\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \\\/  ___)| |_)| | | | | || (_| |  ) ) ) )'  |____| .__|_| |_|_| |_\__, | / / / /=========|_|==============|___/=/_/_/_/:: Spring Boot ::        (v2.1.0.RELEASE)2019-06-19 20:20:50.348  INFO 18344 --- [           main] cn.wq.Application2                    : Starting Application2 on cnki5213 with PID 18344 (C:\AppConsoleSpringBoot\target\classes started by Administrator in C:\AppConsoleSpringBoot)
2019-06-19 20:20:50.354  INFO 18344 --- [           main] cn.wq.Application2                    : No active profile set, falling back to default profiles: default
2019-06-19 20:20:51.303  INFO 18344 --- [           main] cn.wq.Application2                    : Started Application2 in 1.564 seconds (JVM running for 3.74)
程序实际上的入口在这里。
name:kevin
age:6
sex:male
2-name:kevin
2-age:6
2-sex:maleProcess finished with exit code 0