场景：

• json大体格式一致，但是 ext_info 扩展字段对象，场景不同字段不同
• 根据某字段类型,不同值，对应不同实现的 Component，处理不同场景
• 这里根据 event，来做不同处理

{
    "data": {
        "event": "eventWoMan",
        "event_id": "123",
        "ext_info": {
            "dist_sex": "女",
            "dist_height": "162"
        },
        "target_name": "美女类型json"
    },
    "seq": 0
}


{
    "data": {
        "event": "eventWoMan",
        "event_id": "123",
        "ext_info": {
            "dist_name": "小树",
            "dist_age": "18"
        },
        "target_name": "帅哥类型json"
    },
    "seq": 0
}

接收类：

@lombok.Data
public class BusinessMsg<T> {

    private T data;
    private int seq;

}

import com.fasterxml.jackson.annotation.JsonProperty;

@lombok.Data
public class MsgData<T> {

    private String event;
    @JsonProperty("event_id")
    private String eventId;
    @JsonProperty("ext_info")
    private T extInfo;
    @JsonProperty("target_name")
    private String targetName;

}

import com.fasterxml.jackson.annotation.JsonProperty;
import lombok.Data;

@Data
public class ExtInfoMan {

    /**
     * 目标姓名
     */
    @JsonProperty("dist_name")
    private String distName;

    /**
     * 目标年龄
     */
    @JsonProperty("dist_age")
    private String distAge;


}

@Data
public class ExtInfoWoMan {


    /**
     * 目标性别
     */
    @JsonProperty("dist_sex")
    private String distSex;

    /**
     * 目标高度
     */
    @JsonProperty("dist_height")
    private String distHeight;

}

处理service：

public interface JsonTService {

    /**
     * 预处理消息
     * @param businessMsg
     */
     String handlerMsg(BusinessMsg<MsgData<JsonNode>> businessMsg);

}

@Service("eventMan")
public class JsonManServiceImpl implements JsonTService {

    @Resource
    private ObjectMapper objectMapper;

    @SneakyThrows
    @Override
    public String handlerMsg(BusinessMsg<MsgData<JsonNode>> businessMsg) {
        JsonNode extInfo = businessMsg.getData().getExtInfo();
        ExtInfoMan exitInfo = objectMapper.treeToValue(extInfo, ExtInfoMan.class);
        return exitInfo.toString();
    }
}

@Service("eventWoMan")
public class JsonWoManServiceImpl implements JsonTService {

    @Resource
    private ObjectMapper objectMapper;

    @SneakyThrows
    @Override
    public String handlerMsg(BusinessMsg<MsgData<JsonNode>> businessMsg) {
        JsonNode extInfo = businessMsg.getData().getExtInfo();
        ExtInfoWoMan extInfoWoMan = objectMapper.treeToValue(extInfo, ExtInfoWoMan.class);
        return extInfoWoMan.toString();
    }
}

策略处理

import com.service.JsonTService;
import org.springframework.stereotype.Service;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @author xiaoshu
 */
@Service
public class JsonStrategyContext {
    
    private final Map<String, JsonTService> orderStrategyMap = new ConcurrentHashMap<>();
 
    public JsonStrategyContext(Map<String, JsonTService> strategyMap) {
        this.orderStrategyMap.putAll(strategyMap);
    }
 
    public JsonTService getResource(String event){
        return orderStrategyMap.get(event);
    }
}

实际接口接收：

	@Resource
    private JsonStrategyContext jsonStrategyContext;

    @ApiOperation(value = "泛型处理，同格式json，扩展字段不一")
    @PostMapping("/revice")
    public String revice(@RequestBody BusinessMsg<MsgData<JsonNode>> businessMsg){
        String event = businessMsg.getData().getEvent();
        return jsonStrategyContext.getResource(event).handlerMsg(businessMsg);
    }