//方式2:使用mongodb api来操作mongodb数据库。mongoClient是spring-mongo.xml里面配的对象
String host = mongoClient.getAddress().getHost().toString();
DB db = mongoClient.getDB("invest");
//获取到一个叫做"stock_quotation"的集合,相当于关系型数据库中的"表"
DBCollection stockQuotationColl = db.getCollection("stock_quotation");
//find方法查询所有的数据并返回一个游标对象.意思其实就是多少行的数据,每一个游标就是一行
DBCursor cursor = stockQuotationColl.find();
while(cursor.hasNext()) {
System.out.println(cursor.next());
}
//获取表stock_quotation的数据总条数
int sum = cursor.count();
System.out.println("sum==="+sum);
//只查询第一条数据
DBObject oneStock_quotation = stockQuotationColl.findOne();
System.out.println("oneStock_quotation:" + oneStock_quotation);
//条件查询id=50a1ed9965f413fa025166db
DBObject sq01 = stockQuotationColl.findOne(new BasicDBObject("_id",new ObjectId("5b03d024182fbb21a03955e4")));
System.out.println("sq01:" + sq01);
//条件查询stockno=600000 ,trading_day=2008-04-25 00:00:00.000+08:00
DBObject sq02 = stockQuotationColl.findOne(new BasicDBObject("stockno","600000"));
System.out.println("sq02:" + sq02);
//获得所有collection
Set<String> collectionNames = db.getCollectionNames();
for(String name:collectionNames) {
System.out.println("collectionName:"+name);
}
System.out.println("host============" + host);
使用mongodb api来操作mongodb数据库
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转载自my.oschina.net/hfq/blog/1817507
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