java hashMap缓存简单实现

直接上代码，干货:

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

/**
 * map缓存
 * @author ming
 *
 * @param <K>
 * @param <V>
 */
public class MapDataCache {

    private static Map<String, Object> cacheMap;  

    public static Object getCache(String key, Object defaultValue) {
        Object obj = getCacheMap().get(key);
        return obj==null?defaultValue:obj;
    }  

    public static void putCache(String key, Object value) {
        getCacheMap().put(key, value);
    }  

    public static void removeCache(String key) {
        getCacheMap().remove(key);
    }  

    public static Map<String, Object> getCacheMap() {
        if (cacheMap==null){
            cacheMap = new HashMap<String, Object>();
        }
        return cacheMap;
    }  }