一、定义接口

package com.interotc.handler;

/**
 * @author lenovo
 */
public interface IStrategy {
    <T> T execute(T parameter) throws Throwable;
}

二、定义工厂类

package com.interotc.handler;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class StrategyFactory {
    private static final Map<Integer, IStrategy> HANDLERS = new ConcurrentHashMap<>();

    public static IStrategy getInstance(Integer index) {
        return HANDLERS.get(index);
    }

    public static void register(Integer index, IStrategy tokenRequest) {
        HANDLERS.put(index, tokenRequest);
    }
}

三、实现接口的处理类[组件]

package com.interotc.handler;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.interotc.config.CodeEnum;
import com.interotc.config.CustomConfig;
import com.interotc.exception.EcException;
import com.interotc.utils.ConvertUtil;
import com.interotc.utils.CsipWebClient;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.ProceedingJoinPoint;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.util.TreeMap;

import static com.interotc.config.CustomConstants.*;

@Slf4j
@Component
public class TokenProceedHandler implements IStrategy, InitializingBean {
    @Override
    public <T> T execute(T parameter) throws Throwable {
        //todo
        return null;
    }
    @Override
    public void afterPropertiesSet() {
        StrategyFactory.register(I_TOKEN_PROCEED, this);
    }
}

四、调用

JSONObject res = StrategyFactory.getInstance(I_TOKEN_REQUEST).execute(parameter);