Hello,
MongoDB is cross platform,document based,NoSQL database.I am using mongodb 3.0.3.If u search for mongodb java driver,you will get the following link http://mongodb.github.io/mongo-java-driver/ as search result.
This page is the download page for mongodb java driver.You have to select the Operating System and version for the driver.While writing this blog the driver was having 2 versions 3.0.1 and 2.13.1.I used 3.0.1.
Here is the simple java code.
I used eclipse IDE and configured it for mongodb java driver by adding driver as external jar file.
When I execute the code it gets melt down.
It shows following error.
It is because of jar file that I was using.When I opened it using archive manager there was no class file for Decoder.Even there was no folder codecs inside org/bson.
The solution is to download source code of driver and build it to get jar.
I downloaded it from https://github.com/mongodb/mongo-java-driver/releases.
Then extract it and change directory to the extracted location and type ./gradlew.
MongoDB is cross platform,document based,NoSQL database.I am using mongodb 3.0.3.If u search for mongodb java driver,you will get the following link http://mongodb.github.io/mongo-java-driver/ as search result.
This page is the download page for mongodb java driver.You have to select the Operating System and version for the driver.While writing this blog the driver was having 2 versions 3.0.1 and 2.13.1.I used 3.0.1.
Here is the simple java code.
import com.mongodb.MongoClient;
public class mongoCon {
public static void main(String[] args)
{
MongoClient c1=new MongoClient("localhost",27017);
List<String> dbs=c1.getDatabaseNames();
for(String db: dbs)
{
System.out.println(db);
}
}
}
I used eclipse IDE and configured it for mongodb java driver by adding driver as external jar file.
When I execute the code it gets melt down.
It shows following error.
Exception in thread "main" java.lang.NoClassDefFoundError: org/bson/codecs/Decoder
at mongo_java.mongoCon.main(mongoCon.java:12)
Caused by: java.lang.ClassNotFoundException: org.bson.codecs.Decoder
It is because of jar file that I was using.When I opened it using archive manager there was no class file for Decoder.Even there was no folder codecs inside org/bson.
The solution is to download source code of driver and build it to get jar.
I downloaded it from https://github.com/mongodb/mongo-java-driver/releases.
Then extract it and change directory to the extracted location and type ./gradlew.
tar -xf mongo-java-driver-r3.0.1.tar.gz
cd mongo-java-driver-r3.0.1
./gradlew jar
It will build the project and will show "BUILD SUCCESSFUL" if everything is ok. If your network requires proxy setting just change "./gradlew jar" to
./gradlew -Dhttps.proxyHost=192.168.4.254 -Dhttps.proxyPort=3128 jar
After this,you can get the jar file in mongo-java-driver directory of mongo-java-driver-r3.0.1.
Just add this jar file as the external jar for your eclipse project and it will work.
great
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