测试的环境：Spring Boot2 + Maven +lombok
准备需要用到的基础类：
public class People { private String name; private String address; private String phone; }
准备默认的配置文件application.properties，内容如下
people.default.name=zs people.default.address=ccc people.default.phone=122122
准备自定义配置文件people.properties，内容如下
people.default.name=test-zs people.default.address=test-address people.default.phone=111111
准备测试类
@RestController public class PeopleController { @Autowired private People people; @RequestMapping("/test1") public void test1(){ System.out.println(people); } }
第一种情况：读取默认配置文件中的自定义属性（如application.properties）
1、直接在指定类读取文件属性
@Data //@Setter @ToString @Configuration @ConfigurationProperties(prefix = "people.default") public class People { private String name; private String address; private String phone; }
注意：类用到了lombok的注解（@Data）或者使用@Setter注解。所以有getter/setter。如果没有使用注解，则需要setter方法才能读取成功。
2、配合@Vaule读取文件属性
@Configuration public class PeopleConfigrution { @Value("${people.default.name}") private String name; @Value("${people.default.address}") private String address; @Value("${people.default.phone}") private String phone; @Bean public People initPeople(){ People people=new People(); people.setName(name); people.setPhone(phone); people.setAddress(address); return people; } }
3、使用Environment读取
@Configuration public class PeopleConfigrution { @Autowired private Environment environment; @Bean public People initPeople(){ People people=new People(); people.setName(environment.getProperty("people.default.name")); people.setPhone(environment.getProperty("people.default.phone")); people.setAddress(environment.getProperty("people.default.address")); return people; } }
第二种情况：读取自定义文件中的属性(如people.properties)
需指定读取文件的位置,可使用@PropertySource注解指定，如
@Data //@Setter @ToString @Configuration @PropertySource("classpath:people.properties") //指定读取文件位置，可与读取默认文件第一种方式相比。 @ConfigurationProperties(prefix = "people.default") public class People { private String name; private String address; private String phone; }
以上列举的不是全部方式，加载文件的方式还有其他方式，这篇只是列举常用的方式。
原文：https://www.cnblogs.com/luweiweicode/p/14811820.html