Java 使用特定接口注入所有bean的列表
我有一个类(Java 使用特定接口注入所有bean的列表,java,spring,dependency-injection,Java,Spring,Dependency Injection,我有一个类(@Componentbean),看起来像这样: @Component public class EntityCleaner { @Autowired private List<Cleaner> cleaners; public void clean(Entity entity) { for (Cleaner cleaner: cleaners) { cleaner.clean(entity);
@Component
bean),看起来像这样:
@Component
public class EntityCleaner {
@Autowired
private List<Cleaner> cleaners;
public void clean(Entity entity) {
for (Cleaner cleaner: cleaners) {
cleaner.clean(entity);
}
}
}
@Configuration
public class MyConfiguration {
@Bean
public List<Cleaner> businessEntityCleaner() {
List<Cleaner> cleaners = new ArrayList<>();
cleaners.add(new Cleaner1());
cleaners.add(new Cleaner2());
cleaners.add(new Cleaner3());
// ... More cleaners here
return cleaners;
}
}
@组件
公共类实体清理器{
@自动连线
私人名单清洁工;
公共无效清除(实体){
用于(清洁剂:清洁剂){
清洁剂。清洁剂(实体);
}
}
}
Cleaner是一个接口,我有几个Cleaner,我希望它们都能运行(不介意顺序)。今天我做了这样的事情:
@Component
public class EntityCleaner {
@Autowired
private List<Cleaner> cleaners;
public void clean(Entity entity) {
for (Cleaner cleaner: cleaners) {
cleaner.clean(entity);
}
}
}
@Configuration
public class MyConfiguration {
@Bean
public List<Cleaner> businessEntityCleaner() {
List<Cleaner> cleaners = new ArrayList<>();
cleaners.add(new Cleaner1());
cleaners.add(new Cleaner2());
cleaners.add(new Cleaner3());
// ... More cleaners here
return cleaners;
}
}
@配置
公共类MyConfiguration{
@豆子
公共列表businessEntityCleaner(){
List cleaners=new ArrayList();
添加(新的Cleaner1());
添加(新的Cleaner2());
添加(新的Cleaner3());
//……这里有更多的清洁工
返回清洁器;
}
}
有没有一种不在配置中定义特殊方法的方法来构造此列表?就在spring自动神奇地找到了所有这些类,实现了
清理器接口,创建列表并将其注入EntityCleaner
?Javadoc of@Autowired
说:
对于集合或映射依赖项类型,容器
自动关联与声明的值类型匹配的所有bean
因此,您可以执行以下操作:
@Component
public class SomeComponent {
interface SomeInterface {
}
@Component
static class Impl1 implements SomeInterface {
}
@Component
static class Impl2 implements SomeInterface {
}
@Autowired
private List<SomeInterface> listOfImpls;
}
@组件
公共类组件{
接口接口{
}
@组成部分
静态类Impl1实现了SomeInterface{
}
@组成部分
静态类Impl2实现了SomeInterface{
}
@自动连线
私有列表;
}