springboot项目中通过applicationContext.getBeansOfType(class)获取某一接口的所有实现类，并通过枚举完成策略模式，替代if/else,使代码更加优雅易于扩展
下面是项目demo结构，如图
ApiEnum枚举制定接口信息
public enum ApiEnum {
API_01("api01.xml","接口01"),
API_02("api02.xml","接口02");
private String value;
private String desc;
public String getValue() {
return value;
public String getDesc() {
return desc;
ApiEnum(String value, String desc) {
this.value = value;
this.desc = desc;
ApiFactory 获取接口实现bean,并存储到 ConcurrentHashMap，通过枚举获取对应的实现bean
@Component
public class ApiFactory {
@Autowired
ApplicationContext applicationContext;
Map<String, ApiService> beans = new ConcurrentHashMap<>();
@Bean("operations")
public Map<String, ApiService> operations() {
Map<String, ApiService> map = applicationContext.getBeansOfType(ApiService.class);
for (ApiService api : map.values()) {
beans.put(api.op().getValue(), api);
return beans;
public ApiService getApi(ApiEnum apiEnum) {
return beans.get(apiEnum.getValue());
定义接口ApiService
public interface ApiService {
ApiEnum op();
Object invoke(Object obj);
接口实现 TestApiService01、TestApiService02
@Service
public class TestApiService01 implements ApiService {
@Override
public ApiEnum op() {
return ApiEnum.API_01;
@Override
public Object invoke(Object obj) {
return "执行api接口01";
@Service
public class TestApiService02 implements ApiService {
@Override
public ApiEnum op() {
return ApiEnum.API_02;
@Override
public Object invoke(Object obj) {
return "执行api接口02";
定义controller
@RestController
public class TestApiController {
@Autowired
ApiFactory factory;
@RequestMapping("/")
public String index() {
Object invoke = factory.getApi(ApiEnum.API_02).invoke(null);
return (String) invoke;
最后启动项目，访问127.0.0.1:8080测试即可看到对应接口返回
@SpringBootApplication
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
