mongodb find example java

The Java driver I used was version 2.13 Driven by: http://mongodb.github.io/mongo-java-driver/ The corresponding API address is: http://api.mongodb.org/java/2.13/ Design of MongoDB Database interface Packagestorm.db;Importjava.util.ArrayList;ImportCom.mongodb.DB;Importcom.mongodb.DBCollec

= % JAVA_OPTS %-server-XX: PermSize = 128 m-XX: MaxPermSize = 512 m. After this method is tried, the exception persists. After the PermSize is changed, restart tomcat and the exception persists. Method 2: orModify the catalina. sh/bat file: rem catalina.bat set JAVA_OPTS=-Xms64m -Xmx256m -XX:PermSize=128m -XX:MaxNewSize=256M -XX:MaxPermSize=256m #catalina.shJAVA_OPTS=-Xms64m-Xmx256m-XX:PermSize=128m-XX:MaxNewSize=256m-XX:MaxPerSize=256m Failed to restart tomcat Method 3:Add the following at the

This example for you to share the Java Operation MongoDB Fuzzy query and paging query for your reference, the specific contents are as follows Fuzzy query conditions:1. Perfect MatchPattern pattern = pattern.compile ("^name$", pattern.case_insensitive);2, right matchingPattern pattern = pattern.compile ("^.*name$", pattern.case_insensitive);3, left matchPattern

Reference Documentation:Http://blog.csdn.net/wangxiafghj/article/details/9014363geohash Algorithm principle and realization methodHttp://blog.charlee.li/geohash-intro/geohash: Using strings to search for nearby locationshttp://blog.sina.com.cn/s/blog_7c05385f0101eofb.html Find nearby points--geohash scenario discussionhttp://www.wubiao.info/372 Find nearby xxx spherical distance and Geohash scheme discussio

) {System.out.println (_doc.tojson ());}});Greater than or equal to->=Use the same as above, the symbol is $GTELess than-finditerableor finditerableIter1.foreach (New blockpublic void Apply (Document _doc) {System.out.println (_doc.tojson ());}});Less than or equal to-Use the same as above, the symbol is $lteand-andfinditerableor finditerableIter1.foreach (New blockpublic void Apply (Document _doc) {System.out.println (_doc.tojson ());}});or-or.listList.add (New Document ("name", "Zhang San"));L

": {"$oid": "52c62ed8e4b0f4de3dd10110"}, "ranking": 8} {"_id": {"$oid": "52c62ed8e4b0f4de3dd10111"}, "ranking": 9} Collection find ({"Ranking": 1}): {"_id": {"$oid": "52c62ed8e4b0f4de3dd10109"}, "ranking": 1} Collection find ({"ranking": [5-9)}): {"_id": {"$oid": "52c62ed8e4b0f4de3dd1010d"}, "ranking": 5} {"_id": {"$oid": "52c62ed8e4b0f4de3dd1010e"}, "ranking": 6} {"_id": {"$oid": "52c62ed8e4b0f4de3d

stages in the use of time. One is the translation stage, the other is the comparative stage. For example, I passed the parameter 2016-08-12 10:31:20, this time does not specify the timezone, if I want to express the Beijing time, then the corresponding is UTC 2:31:20. There's a problem here. MongoDB time is UTC time, I want to query the data before 10 point 31, and then I use the new date to specify the ti

Tags: pre on () rank compile double ASE ITER PAT supportMongoDB is a NoSQL database that stores something like a JSON object that supports some operations similar to a relational database. Here is the Java operation MongoDB. First, establish a connection (without using any framework, the connection is written by itself, while in this class write the method of closing the connection), the incoming IP address

Due to business needs, the company recently transferred part of the data to the MongoDB database. After deploying the MongoDB database with the corporate DBA, we started our Java Connection MongoDB practice Before you start, recommend two IDE tools to connect to your database 1.rockmongo-on-windows-v0.0.2 (only run su

PackageCom.xinsight.server;Importjava.net.UnknownHostException;ImportJava.util.HashMap;ImportCom.mongodb.BasicDBObject;ImportCom.mongodb.DB;Importcom.mongodb.DBCollection;ImportCom.mongodb.DBCursor;ImportCom.mongodb.Mongo;/*** Find all data in a column in MongoDB that contains a map collection*/ Public classFindmongodbmap {Private StaticMongo mg; Private StaticDB DB; Private Static intnum = 0; Public Stati

/ui.log2>1/data0/xxx/storm-0.9.5/bin/storm logviewer >/data0/xxx/storm-0.9.5/log/logviewer.log2>1 Start Nimbus, supervisor, UI, LogviewerExample Storm configuration file: Storm.zookeeper.servers: -"172.16.0.100" nimbus.host: "172.16.0.100" storm.local.dir: "/data0/xxx/ Storm-0.9.5/workdir " storm.messaging.netty.max_retries:30 storm.messaging.netty.min_wait_ms:100 storm.messaging.netty.max_wait_ms:1500 supervisor.slots.ports: -6700 -6701 -6702 -6703 supervisor.worker.start.timeout.se

for execution tools. The javac and javadoc tools that process source code use the initial class path instead of the expanded class path (for more information, see how to find classes in the following Javac and Javadoc ). How to find extension classes in Java starters An extension class is a class that extends the Java