spring boot 读取配置文件

四种读取properties文件的方式

通过@ConfigurationProperties方式

```java 读取配置文件 import lombok.Getter; import lombok.Setter; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.stereotype.Component;

@Component @ConfigurationProperties(prefix = "bill") public class BillActivitiConfig {

@Getter
@Setter
private static RoleId roleId;

@Getter
@Setter
private static Email email;

@Getter
@Setter
public static class RoleId {
    private String cal;
    private String convert;
    private String push;
}

@Getter
@Setter
public static class Email {
    private String receiver;
    private String cc;
}

}

```properties application-dev.properties
# bill
# 这里注意java文件中属性名是驼峰大小写，写到配置文件应该使用 ‘-’ 分割的全小写
bill.role-id.cal=21
bill.role-id.convert=22
bill.role-id.push=23
#notify email
bill.email.receiver=[e-mail]
bill.email.cc=[e-mail]

ConfigurationProperties 注解需要添加依赖

```xml pom.xml

org.springframework.boot spring-boot-configuration-processor true ```