Spring Boot 获取某接口所有实现类

绪论

在springboot项目中，为了方便，我们可能需要获取某一个接口下面的所有实现类，根据名称进行匹配使用。

正文

1、ServiceLocator.java

package com.yang.config;

import com.yang.workOrder.service.IRootService;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

import java.util.Map;

/**
 * explain：获取应用上下文并获取相应的接口实现类
 *
 * @author yang
 * @date 2021/1/5
 */
@Component
public class ServiceLocator implements ApplicationContextAware {

    /**
     * 用于保存接口实现类名及对应的类
     */
    private Map<String, IRootService> map;

    /**
     * 获取应用上下文并获取相应的接口实现类
     * @param applicationContext
     * @throws BeansException
     */
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        //根据接口类型返回相应的所有bean
        map = applicationContext.getBeansOfType(IRootService.class);
    }

    /**
     * 获取所有实现集合
     * @return
     */
    public Map<String, IRootService> getMap() {
        return map;
    }

    /**
     * 获取对应服务
     * @param key
     * @return
     */
    public IRootService getService(String key) {
        return map.get(key);
    }
}

2、IRootService.java

package com.yang.workOrder.service;

import com.alibaba.fastjson.JSONObject;
import com.yang.workOrder.entity.WorkOrder;

/**
 * explain：基础流程操作服务接口
 *
 * @author yang
 * @date 2021/1/5
 */
public interface IRootService {

    /**
     * 开始流程
     * @param workOrder
     * @return
     */
    boolean startProcess(WorkOrder workOrder);
}

3、RootA001ServiceImpl.java

package com.yang.workOrder.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.yang.workOrder.entity.WorkOrder;
import com.yang.workOrder.service.IRootService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

/**
 * explain：A_001流程审批实现类
 *
 * @author yang
 * @date 2021/1/5
 */
@Service("A_001")
public class RootA001ServiceImpl implements IRootService {

    private static final Logger LOGGER = LoggerFactory.getLogger(RootA001ServiceImpl.class);

    @Override
    public boolean startProcess(WorkOrder workOrder) {
        return false;
    }
}

4、RootA002ServiceImpl.java

package com.yang.workOrder.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.yang.workOrder.entity.WorkOrder;
import com.yang.workOrder.service.IRootService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

/**
 * explain：A_002流程审批实现类
 *
 * @author yang
 * @date 2021/1/5
 */
@Service("A_002")
public class RootA002ServiceImpl implements IRootService {

    private static final Logger LOGGER = LoggerFactory.getLogger(RootA002ServiceImpl.class);

    @Override
    public boolean startProcess(WorkOrder workOrder) {
        return false;
    }
}

结果

（若有什么错误，请留言指正，3Q）