測試的環境:Spring Boot2 + Maven +lombok
準備需要用到的基礎類:
public class People {
private String name;
private String address;
private String phone;
}
準備預設的配置檔案application.properties,內容如下
people.default.name=zs
people.default.address=ccc
people.default.phone=122122
準備自定義配置檔案people.properties,內容如下
people.default.name=test-zs
people.default.address=test-address
people.default.phone=111111
準備測試類
@RestController
public class PeopleController {
@Autowired
private People people;
@RequestMapping("/test1")
public void test1(){
System.out.println(people);
}
}
第一種情況:讀取預設配置檔案中的自定義屬性(如application.properties)
1、直接在指定類讀取檔案屬性
@Data
//@Setter
@ToString
@Configuration
@ConfigurationProperties(prefix = "people.default")
public class People {
private String name;
private String address;
private String phone;
}
測試結果:
注意:類用到了lombok的註解(@Data)或者使用@Setter註解。所以有getter/setter。如果沒有使用註解,則需要setter方法才能讀取成功。
2、配合@Vaule讀取檔案屬性
@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;
}
}
測試結果:
3、使用Environment讀取
@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;
}
}
測試結果:
第二種情況:讀取自定義檔案中的屬性(如people.properties)
需指定讀取檔案的位置,可使用@PropertySource
註解指定,如
@Data
//@Setter
@ToString
@Configuration
@PropertySource("classpath:people.properties") //指定讀取檔案位置,可與讀取預設檔案第一種方式相比。
@ConfigurationProperties(prefix = "people.default")
public class People {
private String name;
private String address;
private String phone;
}
測試結果:
以上列舉的不是全部方式,載入檔案的方式還有其他方式,這篇只是列舉常用的方式。