MongoDB学习笔记【4】-- MongoDB Java驱动使用

　　官方手册：http://docs.mongodb.org/ecosystem/tutorial/getting-started-with-java-driver/#getting-started-with-java-driver
　　
　　下载:



[iyunv@slayer mongo]# wget https://github.com/downloads/mongodb/mongo-java-driver/mongo-2.10.1.jar
　　导入jar路径:



[iyunv@slayer mongodb]# pwd
/root/demos/java/mongodb
[iyunv@slayer mongodb]# export CLASSPATH=/root/demos/java/mongodb/mongo-2.10.1.jar:${CLASSPATH}
　　test.java



import com.mongodb.MongoClient;
import com.mongodb.MongoException;
import com.mongodb.WriteConcern;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.BasicDBObject;
import com.mongodb.DBObject;
import com.mongodb.DBCursor;
import com.mongodb.ServerAddress;
import java.util.Arrays;
import java.util.Set;
import java.util.Iterator;
public class test {
public static void main(String[] args) {
try {
// connection
MongoClient mongoClient = new MongoClient( "localhost" );
DB db = mongoClient.getDB( "mydb" );
// read collectionNames
System.out.println("CollectionNames:");
Set colls = db.getCollectionNames();
for (String s : colls) {
System.out.println("\t" + s);
}
Iterator it = colls.iterator();
String collName = it.next();
// select a collection to use
DBCollection coll = db.getCollection(collName);
// set write concern
         mongoClient.setWriteConcern(WriteConcern.JOURNALED);
// insert a document
BasicDBObject doc = new BasicDBObject("name", "MongoDB").
append("type", "database").
append("count", 1).
append("info", new BasicDBObject("x", 203).append("y", 102));
coll.insert(doc);
// find document
DBObject myDoc = coll.findOne();
System.out.println("\nnew inserted document:\n" + myDoc);
} catch ( Exception ext) {
System.out.println("exception");
}
}
};
　　编译运行：



[iyunv@slayer mongodb]# javac test.java
[iyunv@slayer mongodb]# java test
CollectionNames:
fc
people
system.indexes
new inserted document:
{ "_id" : { "$oid" : "50cd3bede4b0f248ede01130"} , "name" : "MongoDB" , "type" : "database" , "count" : 1 , "info" : { "x" : 203 , "y" : 102}}
　　
　　MongoDB学习笔记【1】-- 安装启动
　　MongoDB学习笔记【2】-- 试用
　　MongoDB学习笔记【3】-- MongoDB C驱动使用
MongoDB学习笔记【4】-- MongoDB Java驱动使用