mongodb java

获取client 默认连接本地

MongoClient mongoClient = new MongoClient();

查看源码：
this(defaultHost(), defaultPort());

获取DB

MongoDatabase db = mongoClient.getDatabase("pcs");

连接collection 操作

插入

db.getCollection("product").insertOne(                new Document("topProductTypeId", 1).append("topProductTypeName","跟团游").append("subProductTypeId",0));更新
UpdateResult result= db.getCollection("product").updateMany(new Document("dates.departDate", "2015-11-5"), new Document("$set", new Document("dates.$.price",999)));
查询
FindIterable<Document> iterable=db.getCollection("product").find(new Document("dates.price",new Document("$gt",9995)));
iterable.forEach(new Block<Document>() {    @Override    public void apply(final Document document) {        System.out.println(document);    }});