相关注解

bean声明

  • @componentScan
  • @bean
  • @compent
  • @service
  • @controller
  • @configuration

bean组入：

@Autowired和@Qualifier
image.png
@Resource()

属性注入

  • @Autowired
  • @Value
  • @PropertySource
  • @ConfigurationProperty

属性组入示例

普通属性注入

  1. @Data
  2. public class Dog {
  4.     private String name;
  6.     private Integer age;
  7. }
  9. @ConfigurationProperties(prefix = "person")
  10. @Component
  11. @Data
  12. public class Person {
  13.     private String name;
  14.     private Integer age;
  15.     private Boolean boss;
  16.     private Date birth;
  17.     private String[] jobs;
  18.     private List<String> lists;
  19.     private Map<String, String> maps;
  20.     private Dog dog;
  21. }

application.yml文件

  1. person:
  2.   name: name
  3.   age: 14
  4.   boss: false
  5.   birth:  2014/2/23
  6.   jobs: 12,23,34,545
  7.   lists:
  8.     - list
  9.     - set
  10.     - map
  11.   maps: [key1:value,key2:value,keg4:value]
  12.   dog:
  13.     name: x考古
  14.     age: 22

@ConfigurationProperties 使用相同前缀的配置属性 @Component 声明为bean，支持注入 若使用@EnableConfigurationProperties, 自动对使用@ConfigurationProperties的类声明bean

使用指定配置文件注入

  1. @Component
  2. @ConfigurationProperties(prefix = "school")
  3. //加载指定配置文件，不支持yml文件读取
  4. @PropertySource("classpath:person_info.properties")
  5. @Data
  6. public class School {
  8.     private String age;
  10.     private String name;
  11. }

person_info.properties文件

  1. school.name=test
  2. school.age=44

@PropertySource 读取指定配置文件属性，不支持yml文件读取

静态属性注入

  1. @Component
  2. @ConfigurationProperties(prefix = "school2")
  3. //加载指定配置文件，不支持yml文件读取
  4. @PropertySource("classpath:person_info.properties")
  5. public class School2 {
  7.     private static String age;
  9.     private static String name;
  11.     /**
  12.      * 支持静态属性注入，set方法设置为非静态
  13.      *
  14.      * @param age
  15.      */
  16.     public void setAge(String age) {
  17.         School2.age = age;
  18.     }
  20.     public void setName(String name) {
  21.         School2.name = name;
  22.     }
  24.     public static String getName() {
  25.         return name;
  26.     }
  28.     public static String getAge() {
  29.         return age;
  30.     }
  31. }
  34. @Component
  35. public class Person_static {
  36.     public static Integer age;
  38.     /**
  39.      * 非static方法，支持静态属性注入
  40.      *
  41.      * @param age
  42.      */
  43.     @Value("${person.age}")
  44.     public void setAge(Integer age) {
  45.         Person_static.age = age;
  46.     }
  48.     public static Integer getAge() {
  49.         return age;
  50.     }
  52. }

person_info.properties文件

  1. school2.name=test2
  2. school2.age=442

静态属性注入，把set方法设置为非静态即可