mongoDB批量插入文档时，运行下面代码，用MongoVUE查看数据库，mongo库中只存在一个文档？不应该是20个吗？
import java.net.UnknownHostException;
import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.Mongo;
public class HelloMongoDB {
private static Mongo mg;
private static DB db;
private static DBCollection col;
public static void main(String[] args) throws UnknownHostException {
HelloMongoDB hello = new HelloMongoDB();
if (mg == null) {
mg = new Mongo("127.0.0.1", 27017);
}
if (db == null) {
db = mg.getDB("Studing");
}
if (col == null) {
col = db.getCollection("test");
}
hello.InsertDocument(col);
}
public void InsertDocument(DBCollection col) {
for (int i = 0; i < 10; i++) {
BasicDBObject docu = new BasicDBObject();
docu.put("type", "super");
docu.put("price", i + 10);
col.insert(docu);
}
for (int i = 0; i < 10; i++) {
BasicDBObject docu = new BasicDBObject();
docu.put("type", "tang");
docu.put("price", i + 10);
col.insert(docu);
}
}
}
