摘要：package com.x.mongodb;import java.net.UnknownHostException;import java.util.Collection;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Map.Entry;import java.util.Set;import org.bson.types.BasicBSONList;import org.bson.types.ObjectId;import com.mongodb.BasicDB 阅读全文