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生活如麻 发表于 2016-12-2 07:28:27

java 集成mongo

　　记录一下Eclipse集成 Mongo
　　1、pom.xml中增加依赖
　　<!--  mongo -->
  <dependency>
   <groupId>org.mongodb</groupId>
   <artifactId>mongo-java-driver</artifactId>
   <version>2.12.4</version>
  </dependency>
　　2、代码：

package com.iflytek.mongotest.dao;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.commons.lang.math.NumberUtils;
import org.bson.BSONObject;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.stereotype.Component;
import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.MongoClient;
import com.mongodb.MongoClientOptions;
import com.mongodb.ServerAddress;
import com.mongodb.util.JSON;
@Component
public class MongoDao implements InitializingBean {
/**
* 集合名称
*/
private MongoClient mongoClient;
String dbName;
String collectionName;
@Override
public void afterPropertiesSet() throws Exception {
dbName = Cfg.get("sendsong.mongo.db");
collectionName = Cfg.get("sendsong.mongo.collection");
int connections = NumberUtils.toInt(
Cfg.get("sendsong.mongo.connections"), 20);
int timeout = NumberUtils.toInt(Cfg.get("sendsong.mongo.connections"),
3000);
int waitNumber = NumberUtils.toInt(
Cfg.get("sendsong.mongo.waitNumber"), 100);
int maxwait = NumberUtils
.toInt(Cfg.get("sendsong.mongo.maxwait"), 5000);
MongoClientOptions.Builder build = new MongoClientOptions.Builder();
build.connectionsPerHost(connections);
build.connectTimeout(timeout);
build.threadsAllowedToBlockForConnectionMultiplier(waitNumber);
build.maxWaitTime(maxwait);
MongoClientOptions options = build.build();
String url = Cfg.get("sendsong.mongo.url");
List<ServerAddress> addresses = new ArrayList<ServerAddress>();
String[] addressStr = url.split(",");
for (String str : addressStr) {
String[] re = str.split(":");
ServerAddress address = new ServerAddress(re,
Integer.parseInt(re));
addresses.add(address);
}
mongoClient = new MongoClient(addresses, options);
}
/**
* 插入集合
* @param branchId
* @param sendsongId
*/
public void insertSendsong(String branchId, long sendsongId) {
DB db = mongoClient.getDB(dbName);
DBCollection collection = db.getCollection(collectionName);
DBObject object = new BasicDBObject();
object.put("sendsongid", sendsongId);
object.put("branchid", branchId);
object.put("status", SendSongStatus.ADD_TASK_SUCCESS);
object.put("createtime", System.currentTimeMillis());
collection.insert(object);
}
/**
* 查询所有集合
* @param brachid
* @param sendsongId
*/
public void querSendsong(String brachid, long sendsongId) {
DB db = mongoClient.getDB(dbName);
DBCollection collection = db.getCollection("sendsonginfo");
DBCursor cur = collection.find();
while (cur.hasNext()) {
System.out.println(cur.next());
}
System.out.println(cur.count());
System.out.println(cur.getCursorId());
System.out.println(JSON.serialize(cur));
}
/**
* 查询单个集合
* @param brachid
* @param sendsongId
*/
public void querySingle(String brachid, long sendsongId) {
DB db = mongoClient.getDB(dbName);
DBCollection collection = db.getCollection("sendsonginfo");
Map<String,Object> map=new HashMap<String, Object>();
map.put("sendsongid", 100);
map.put("createtime", 1432L);
DBCursor cur = collection.find(new BasicDBObject(map));
while (cur.hasNext()) {
System.out.println(cur.next());
}
}
/**
* 根据条件删除集合中的元素
* @param brachid
* @param sendsongId
*/
public void delCollect() {
DB db = mongoClient.getDB(dbName);
DBCollection collection = db.getCollection("sendsonginfo");
Map<String,Object> map=new HashMap<String, Object>();
map.put("sendsongid", 100);
map.put("createtime", 1432L);
collection.remove(new BasicDBObject(map));
//collection.drop(); 删除集合里所有的元素
}

//更新集合
public void updateCollect()
{
DB db = mongoClient.getDB(dbName);
DBCollection collection = db.getCollection("sendsonginfo");
Map<String,Object> map=new HashMap<String, Object>();
map.put("sendsongid", 100);
map.put("createtime", 1431L);
Map<String,Object> map1=new HashMap<String, Object>();
map.put("sendsongid", 100);
map.put("createtime", 1432L);
//upsert when true, inserts a document if no document matches the update query criteriatrue:如果数据库里没有，则插入一条
//multi when true, updates all documents in the collection that match the update query criteria,true: 更新所有的记录false:只更新第一条
collection.update(new BasicDBObject(map1), new BasicDBObject(map),true,false);
}


}

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