Java实现一个简单的缓存方法

public class EntityCache {    private Object datas;    private long timeOut;    private long lastRefeshTime;  public EntityCache(Object datas, long timeOut, long lastRefeshTime) {    this.datas = datas;    this.timeOut = timeOut;    this.lastRefeshTime = lastRefeshTime;  }  public Object getDatas() {    return datas;  }  public void setDatas(Object datas) {    this.datas = datas;  }  public long getTimeOut() {    return timeOut;  }  public void setTimeOut(long timeOut) {    this.timeOut = timeOut;  }  public long getLastRefeshTime() {    return lastRefeshTime;  }  public void setLastRefeshTime(long lastRefeshTime) {    this.lastRefeshTime = lastRefeshTime;  }}