钉钉向程序写数据缓存实例

好的，下面是一个简单的钉钉程序中写数据缓存的示例：

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.dingtalk.open.client.api.model.corp.CorpUserDetail;
import com.dingtalk.open.client.api.model.corp.CorpUserDetailList;
import com.dingtalk.open.client.api.service.corp.CorpUserService;
import com.dingtalk.open.client.common.SdkInitException;
import com.dingtalk.open.client.common.ServiceException;
import com.dingtalk.open.client.common.ServiceRuntimeException;
import com.dingtalk.open.client.service.ServiceFactory;
import com.dingtalk.open.client.service.corp.CorpUserService;
import com.dingtalk.open.client.service.corp.impl.CorpUserServiceImpl;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class DataCache {

    private static final String CACHE_KEY = "corp_user_detail";

    private static CorpUserService corpUserService = null;

    private static Map<String, Object> cacheMap = new HashMap<>();

    static {
        try {
            ServiceFactory serviceFactory = ServiceFactory.getInstance();
            corpUserService = serviceFactory.getOpenService(CorpUserService.class);
        } catch (SdkInitException e) {
            e.printStackTrace();
        }
    }

    public static CorpUserDetailList getCorpUserDetailList(String corpId, Long departmentId) {

        String cacheKey = CACHE_KEY + "_" + corpId + "_" + departmentId;
        if (cacheMap.containsKey(cacheKey)) {
            return (CorpUserDetailList) cacheMap.get(cacheKey);
        }

        CorpUserDetailList corpUserDetailList = new CorpUserDetailList();
        try {
            int offset = 0;
            int size = 100;
            while (true) {
                CorpUserDetailList response = corpUserService.getCorpUserList(corpId, departmentId, offset, size, null);
                if (response == null || response.getUserlist() == null || response.getUserlist().isEmpty()) {
                    break;
                }
                corpUserDetailList.getUserlist().addAll(response.getUserlist());
                offset += size;
            }
        } catch (ServiceException e) {
            throw new ServiceRuntimeException(e);
        }

        cacheMap.put(cacheKey, corpUserDetailList);
        return corpUserDetailList;
    }

    public static void clearCache() {
        cacheMap.clear();
    }
}

这是一个缓存企业微信用户信息的示例，使用了一个静态变量 `cacheMap` 存储缓存数据，缓存的 key 为 `CACHE_KEY + "_" + corpId + "_" + departmentId`，其中 `corpId` 和 `departmentId` 分别为企业微信的企业 ID 和部门 ID，`CACHE_KEY` 为缓存 key 的前缀。

`getCorpUserDetailList` 方法用于获取企业微信用户信息列表，如果缓存中已经存在相应的数据，则直接返回缓存数据，否则调用钉钉开放平台提供的接口获取数据，并将数据存入缓存中。

`clearCache` 方法用于清空缓存中的数据。

注意：此示例仅供参考，具体实现需要根据实际需求进行调整。