Spring @Bean标注在有参方法上
@Bean标注在有参方法上可以获取参数的Bean,若为List集合 则获取继承或实现该类的所有已注入的Bean,验证如下
Person.java
public interface Person {
/**
* 信息
* @return String
*/
String inf();
}
Student.java
public class Student implements Person {
private String work;
public Student(String work){
this.work=this.getClass().getName()+":"+work;
}
@Override
public String inf() {
return this.work;
}
}
Worker.java
public class Worker implements Person {
private String work;
public Worker(String work){
this.work=this.getClass().getName()+":"+work;
}
@Override
public String inf() {
return this.work;
}
}
AnimalAutoConfiguration
@Configuration
public class AnimalAutoConfiguration {
@Bean
public Student getUser(){
return new Student("学生");
}
@Bean
public Worker getWorker(){
return new Worker("上班族");
}
/**
* 此处将把所有实现Persion接口的类的Bean注入list集合中
*/
@Bean
public List<Person> getAnimals(List<Person> list){
return list;
}
}
Test.java
@RestController
public class Test {
@Autowired
private Student student;
@Autowired
private Worker worker;
@Autowired
private List<Person> animals;
@GetMapping(value = "/get/info")
public void test(){
System.out.println("student--->"+student.inf());;
System.out.println("worker--->"+worker.inf());;
for (Person person:animals) {
System.out.println("animals--->"+person.inf());;
}
}
}
注:getway网关中使用该方式将所有全局过滤器集合作为参数(单个实现类也需要注入,才能获取到集合)