MongoDB之Java测试代码（DAO层）

MongoInit.java是数据库初始化及连接类

MongoUtils.java是对mongodb的各种操作方法

MongoInit.java

package com.wlwcloud.datatest;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.UnknownHostException;
import java.util.Properties;

import org.apache.log4j.Logger;

import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.Mongo;
import com.mongodb.MongoOptions;
import com.mongodb.ServerAddress;

/**
 * Mongo工具类:设计为单例模式，每当月份发生变化，数据库连接名称就会发生变化，这是业务规则 因MongoDB的Java驱动是线程安全的，对于一般的应用，只要一个Mongo实例即可，Mongo有个内置的连接池（池大小默认为10个）。
 * 对于有大量写和读的环境中，为了确保在一个Session中使用同一个DB时，我们可以用以下方式保证一致性： DB mdb =mongo.getDB('dbname'); mdb.requestStart(); // 业务代码 mdb.requestDone();
 * DB和DBCollection是绝对线程安全的
 * @author undoner
 */
public class MongoInit {
	/** DB监听端口号 */
	private static int DBPort = 27017;
	/** DB连接URL */
	private static String DBUrl = "localhost";
	/** 连接DB库名称 */
	private static String DBName = "wlwdb";
	static Logger log = Logger.getRootLogger();
	private static Mongo mongo;
	private static DBCollection coll;
	private static DB db;

	static {
		try {
			DBproperties();
			MongoOptions options = new MongoOptions();
			options.autoConnectRetry = true;
			options.connectionsPerHost = 1000;
			options.maxWaitTime = 5000;
			options.socketTimeout = 0;
			options.connectTimeout = 15000;
			options.threadsAllowedToBlockForConnectionMultiplier = 5000;
			// 事实上，Mongo实例代表了一个数据库连接池，即使在多线程的环境中，一个Mongo实例对我们来说已经足够了
			ServerAddress serverAddress = new ServerAddress(DBUrl, DBPort);
			mongo = new Mongo(serverAddress, options);
		} catch (UnknownHostException e) {
			log.info("get mongo instance failed");
		}
	}

	static void DBproperties() {
		// 读取配置文件config.properties中的属性值
		String myFilePath = MongoInit.class.getResource("/").getPath() + "MongoDBConfig.properties";
		Properties properties = new Properties();
		FileInputStream fileInputStream = null;
		try {
			   fileInputStream = new FileInputStream(myFilePath);
			   properties.load(fileInputStream);
			   DBPort = Integer.parseInt((String) properties.getProperty("DBPort"));
			   DBUrl = (String) properties.getProperty("DBUrl");
			   DBName = (String) properties.getProperty("DBName");
			  } catch (Exception e) {
			   e.printStackTrace();
			  } finally {
			   try {
			    fileInputStream.close();
			   } catch (IOException e) {
			    // TODO Auto-generated catch block
			    e.printStackTrace();
			   }
		}

	}

	public static DB getDB() {
		if (db == null) {
			db = mongo.getDB(DBName);
		}
		return db;
	}

	public static Mongo getMong() {
		return mongo;
	}

	public static DBCollection getColl(String collname) {
		return getDB().getCollection(collname);
	}

}

MongoUtils.java

package com.wlwcloud.datatest;

import java.net.UnknownHostException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.ketayao.ketacustom.entity.main.User;
import com.ketayao.utils.SecurityUtils;
import com.mongodb.AggregationOutput;
import com.mongodb.BasicDBList;
import com.mongodb.BasicDBObject;
import com.mongodb.BasicDBObjectBuilder;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.MapReduceCommand;
import com.mongodb.MapReduceOutput;
import com.mongodb.Mongo;
import com.mongodb.MongoException;
import com.mongodb.QueryBuilder;
import com.mongodb.WriteConcern;

public class MongoUtils {
	//DBCursor cursor = coll.find(condition).addOption(Bytes.QUERYOPTION_NOTIMEOUT);//设置游标不要超时  

    /**
     * 获取所有数据库实例
     */
    public void testGetDBS() {
        List<String> dbnames = MongoInit.getMong().getDatabaseNames();
        for (String dbname : dbnames) {
            System.out.println("dbname:" + dbname);
        }
    }  

    /**
     * 删除数据库
     */
    public void dropDatabase(String dbname) {
        MongoInit.getMong().dropDatabase(dbname);
    }  

    /**
     * 查询所有表名
     */
    public void getAllCollections() {
        Set<String> colls = MongoInit.getDB().getCollectionNames();
        for (String s : colls) {
            System.out.println("Collections:"+s);
        }
    }  

    /**
     * 删除一个表
     */
    public void dropCollection(String collection) {
        MongoInit.getColl(collection).drop();
    }  

    /**
     * 添加一条记录
     */  

    public void addData(String dbCollection,String dataID,String dataTime,String dataContent,String dataStatus) {
        DBCollection coll = MongoInit.getColl(dbCollection);
        BasicDBObject doc = new BasicDBObject();
        doc.put("id", dataID);
        doc.put("time", dataTime);
        doc.put("data", dataContent);
        doc.put("status", dataStatus);
        coll.insert(doc);
        // 设定write concern，以便操作失败时得到提示
        coll.setWriteConcern(WriteConcern.SAFE);
        findOne(dbCollection);
    }  

    /**
     * 创建索引
     */
    public void createIndex(String collection) {
        MongoInit.getColl(collection).createIndex(new BasicDBObject("index_id", 1));
    }  

    /**
     * 获取索引信息
     */
    public void getIndexInfo(String dbCollection) {
        List<DBObject> list = MongoInit.getColl(dbCollection).getIndexInfo();
        for (DBObject o : list) {
            System.out.println(o);
        }
    }  

    /**
     * 添加多条记录
     */
    public void addMultiData() {
        for (int i = 0; i < 100; i++) {
            MongoInit.getColl("wujintao").insert(
                    new BasicDBObject().append("i", i));
        }  

        List<DBObject> docs = new ArrayList<DBObject>();
        for (int i = 0; i < 50; i++) {
            docs.add(new BasicDBObject().append("i", i));
        }
        MongoInit.getColl("wujintao").insert(docs);
        // 设定write concern，以便操作失败时得到提示
        MongoInit.getColl("wujintao").setWriteConcern(WriteConcern.SAFE);
    }  

    /**
     * 查找第一条记录
     */
    public void findOne(String dbCollection) {
        DBObject myDoc = MongoInit.getColl(dbCollection).findOne();
        System.out.println(myDoc);
    }  

    /**
     * 获取表中所有记录条数
     */
    public void count(String dbCollection) {
        System.out.println(MongoInit.getColl(dbCollection).getCount());
        System.out.println(MongoInit.getColl(dbCollection).count());
    }  

    /**
     * 获取查询结果集的记录数
     */
    public void getCount(String dbCollection,String dataID) {
        DBObject query = new BasicDBObject("id", dataID);
        long count = MongoInit.getColl(dbCollection).count(query);
        System.out.println(count);
    }  

    /**
     * 查询所有结果
     */
    public void getAllDocuments(String dbCollection) {
        DBCursor cursor = MongoInit.getColl(dbCollection).find();
        try {
            while (cursor.hasNext()) {
                System.out.println(cursor.next());
            }
        } finally {
            cursor.close();
        }
    }  

    /**
     * 按照一个条件查询
     */
    public void queryByConditionOne() {
        BasicDBObject query = new BasicDBObject();
        query.put("name", "MongoDB");
        DBCursor cursor = MongoInit.getColl("wujintao").find(query);  

        try {
            while (cursor.hasNext()) {
                System.out.println(cursor.next());
            }
        } finally {
            cursor.close();
        }
    }
    public List<SensorData> queryById(String id) {
    	User user = SecurityUtils.getLoginUser();
        BasicDBObject query = new BasicDBObject();
        System.out.print(id);
        query.put("id", id);
        String table="table_";
        DBCursor cursor = MongoInit.getColl("table_"+user.getUsername()).find(query);
        List<DBObject> list=cursor.toArray();
        System.out.println(list.size());
        System.out.println("dao.."+list.toString());
        List<SensorData> sensordata=new ArrayList<SensorData>();
        for(int i=1;i<list.size();i++)
        {
        	String sid=(String)list.get(i).get("id");
        	String stime=(String)list.get(i).get("time");
        	String sdata=(String)list.get(i).get("data");
        	String status=(String)list.get(i).get("status");
        	String sstatus;
        	if(status.equals("0"))sstatus="正常";
        	else if(status.equals("1")) sstatus="删除";
        	else sstatus="未知状态";
            SensorData a=new SensorData(sid,stime,sdata,sstatus);
        //System.out.print(a.getData()+a.getId()+a.getStatus()+a.getTime());
        sensordata.add(a);
        }
        return sensordata;
       /* try {
            while (cursor.hasNext()) {
                System.out.println(cursor.next());
            }
        } finally {
            cursor.close();
        } */
    }  

    /**
     * AND多条件查询,区间查询
     */
    public void queryMulti() {
        BasicDBObject query = new BasicDBObject();
        // 查询j不等于3,k大于10的结果集
        query.put("j", new BasicDBObject("$ne", 3));
        query.put("k", new BasicDBObject("$gt", 10));
        DBCursor cursor = MongoInit.getColl("wujintao").find(query);
        try {
            while (cursor.hasNext()) {
                System.out.println(cursor.next());
            }
        } finally {
            cursor.close();
        }
    }  

    /**
     * 区间查询
     * select * from table where i >50
     */
    public void queryMulti2() {
        BasicDBObject query = new BasicDBObject();
        query = new BasicDBObject();
        query.put("i", new BasicDBObject("$gt", 50)); // e.g. find all where i >
        DBCursor cursor = MongoInit.getColl("wujintao").find(query);
        try {
            while (cursor.hasNext()) {
                System.out.println(cursor.next());
            }
        } finally {
            cursor.close();
        }
    }  

    /**
     * 区间查询
     * select * from table where 20 < i <= 30
        //比较符
        //"$gt"： 大于
        //"$gte"：大于等于
        //"$lt"： 小于
        //"$lte"：小于等于
        //"$in"： 包含
     */
    public void queryMulti3() {
        BasicDBObject query = new BasicDBObject();
        query = new BasicDBObject();  

        query.put("i", new BasicDBObject("$gt", 20).append("$lte", 30));
        DBCursor cursor = MongoInit.getColl("wujintao").find(query);
        try {
            while (cursor.hasNext()) {
                System.out.println(cursor.next());
            }
        } finally {
            cursor.close();
        }
    }  

    /**
     * 组合in和and select * from test_Table where (a=5 or b=6) and (c=5 or d = 6)
     */
    public void queryMulti4() {
        BasicDBObject query11 = new BasicDBObject();
        query11.put("a", 1);
        BasicDBObject query12 = new BasicDBObject();
        query12.put("b", 2);
        List<BasicDBObject> orQueryList1 = new ArrayList<BasicDBObject>();
        orQueryList1.add(query11);
        orQueryList1.add(query12);
        BasicDBObject orQuery1 = new BasicDBObject("$or", orQueryList1);  

        BasicDBObject query21 = new BasicDBObject();
        query21.put("c", 5);
        BasicDBObject query22 = new BasicDBObject();
        query22.put("d", 6);
        List<BasicDBObject> orQueryList2 = new ArrayList<BasicDBObject>();
        orQueryList2.add(query21);
        orQueryList2.add(query22);
        BasicDBObject orQuery2 = new BasicDBObject("$or", orQueryList2);  

        List<BasicDBObject> orQueryCombinationList = new ArrayList<BasicDBObject>();
        orQueryCombinationList.add(orQuery1);
        orQueryCombinationList.add(orQuery2);  

        BasicDBObject finalQuery = new BasicDBObject("$and",
                orQueryCombinationList);
        DBCursor cursor = MongoInit.getColl("wujintao").find(finalQuery);
    }  

    /**
     * IN查询
     * if i need to query name in (a,b); just use { name : { $in : ['a', 'b'] } }
     * select * from things where name='a' or name='b'
     * @param coll
     */
    public void queryIn() {
        BasicDBList values = new BasicDBList();
        values.add("a");
        values.add("b");
        BasicDBObject in = new BasicDBObject("$in", values);
        DBCursor cursor = MongoInit.getColl("wujintao").find(
                new BasicDBObject("name", in));
        try {
            while (cursor.hasNext()) {
                System.out.println(cursor.next());
            }
        } finally {
            cursor.close();
        }
    }  

    /**
     * 或查询
     * select * from table where name  = '12' or title = 'p'
     * @param coll
     */
    public void queryOr() {
        QueryBuilder query = new QueryBuilder();
        query.or(new BasicDBObject("name", 12), new BasicDBObject("title", "p"));
        DBCursor cursor = MongoInit.getColl("wujintao").find(query.get()).addSpecial("$returnKey", "");
        try {
            while (cursor.hasNext()) {
                System.out.println(cursor.next());
            }
        } finally {
            cursor.close();
        }
    }  

    public void customQueryField() throws UnknownHostException{
        Mongo mongo = new Mongo("localhost", 27017);
        DB db = mongo.getDB("zhongsou_ad");
        BasicDBObjectBuilder bulder = new BasicDBObjectBuilder();
        bulder.add("times",1);
        bulder.add("aid",1);
        DBCursor cusor =  db.getCollection("ad_union_ad_c_1").find(new BasicDBObject(),bulder.get());
        for (DBObject dbObject : cusor) {
            System.out.println(dbObject);
        }
    }  

    public void mapReduce() throws UnknownHostException{
        Mongo mongo = new Mongo("localhost", 27017);
        DB db = mongo.getDB("zhongsou_ad");
        /***
         *  book1 = {name : "Understanding JAVA", pages : 100}
         *  book2 = {name : "Understanding JSON", pages : 200}
         *  db.books.save(book1)
         *  db.books.save(book2)
         *  book = {name : "Understanding XML", pages : 300}
         *  db.books.save(book)
         *  book = {name : "Understanding Web Services", pages : 400}
         *  db.books.save(book)
         *  book = {name : "Understanding Axis2", pages : 150}
         *  db.books.save(book)
         *
        var map = function() {
            var category;
            if ( this.pages >= 250 )
                category = 'Big Books';
            else
                category = "Small Books";
            emit(category, {name: this.name});
        };
        var reduce = function(key, values) {
            var sum = 0;
            values.forEach(function(doc) {
                sum += 1;
            });
            return {books: sum};
        };
        var count  = db.books.mapReduce(map, reduce, {out: "book_results"});
         */
        try {  

            DBCollection books = db.getCollection("books");  

            BasicDBObject book = new BasicDBObject();
            book.put("name", "Understanding JAVA");
            book.put("pages", 100);
            books.insert(book);  

            book = new BasicDBObject();
            book.put("name", "Understanding JSON");
            book.put("pages", 200);
            books.insert(book);  

            book = new BasicDBObject();
            book.put("name", "Understanding XML");
            book.put("pages", 300);
            books.insert(book);  

            book = new BasicDBObject();
            book.put("name", "Understanding Web Services");
            book.put("pages", 400);
            books.insert(book);  

            book = new BasicDBObject();
            book.put("name", "Understanding Axis2");
            book.put("pages", 150);
            books.insert(book);  

            String map = "function() { "+
                      "var category; " +
                      "if ( this.pages >= 250 ) "+
                      "category = 'Big Books'; " +
                      "else " +
                      "category = 'Small Books'; "+
                      "emit(category, {name: this.name});}";  

            String reduce = "function(key, values) { " +
                                     "var sum = 0; " +
                                     "values.forEach(function(doc) { " +
                                     "sum += 1; "+
                                     "}); " +
                                     "return {books: sum};} ";  

            MapReduceCommand cmd = new MapReduceCommand(books, map, reduce,
              null, MapReduceCommand.OutputType.INLINE, null);  

            MapReduceOutput out = books.mapReduce(cmd);  

            for (DBObject o : out.results()) {
             System.out.println(o.toString());
            }
           } catch (Exception e) {
             e.printStackTrace();
           }
    }  

    public void GroupByManyField() throws UnknownHostException{
        //此方法没有运行成功
        Mongo mongo = new Mongo("localhost", 27017);
        DB db = mongo.getDB("libary");
        DBCollection books = db.getCollection("books");
        BasicDBObject groupKeys = new BasicDBObject();
        groupKeys.put("total", new BasicDBObject("$sum","pages"));  

        BasicDBObject condition = new BasicDBObject();
        condition.append("pages", new BasicDBObject().put("$gt", 0));  

        String reduce = "function(key, values) { " +
                "var sum = 0; " +
                "values.forEach(function(doc) { " +
                "sum += 1; "+
                "}); " +
                "return {books: sum};} ";
        /**
         BasicDBList basicDBList = (BasicDBList)db.getCollection("mongodb中集合编码或者编码")
                   .group(DBObject key,   --分组字段，即group by的字段
                DBObject cond,        --查询中where条件
                DBObject initial,     --初始化各字段的值
                String reduce,        --每个分组都需要执行的Function
                String finial         --终结Funciton对结果进行最终的处理
         */
        DBObject obj = books.group(groupKeys, condition,  new BasicDBObject(), reduce);
        System.out.println(obj);  

        AggregationOutput ouput = books.aggregate(new BasicDBObject("$group",groupKeys));
        System.out.println(ouput.getCommandResult());
        System.out.println(books.find(new BasicDBObject("$group",groupKeys)));
    }     

    /**
     * 分页查询
     */
    public void pageQuery() {
        DBCursor cursor = MongoInit.getColl("wujintao").find().skip(0)
                .limit(10);
        while (cursor.hasNext()) {
            System.out.println(cursor.next());
        }
    }  

    /**
     * 模糊查询
     */
    public void likeQuery() {
        Pattern john = Pattern.compile("joh?n");
        BasicDBObject query = new BasicDBObject("name", john);  

        // finds all people with "name" matching /joh?n/i
        DBCursor cursor = MongoInit.getColl("wujintao").find(query);
    }  

    /**
     * 条件删除
     */
    public void delete(String dbCollection,String dataID) {
        BasicDBObject query = new BasicDBObject();
        query.put("id", dataID);
        // 找到并且删除，并返回删除的对象
        DBObject removeObj = MongoInit.getColl(dbCollection).findAndRemove(query);
        System.out.println(removeObj);
    }  

    /**
     * 更新
     */
    public void update() {
        BasicDBObject query = new BasicDBObject();
        query.put("name", "liu");
        DBObject stuFound = MongoInit.getColl("wujintao").findOne(query);
        stuFound.put("name", stuFound.get("name") + "update_1");
        MongoInit.getColl("wujintao").update(query, stuFound);
    }  

    public void testGpsData() {
    	try {
			//13862082455:117.13172:029.77659:131.2580
    		Date d = new Date();
			SimpleDateFormat  sdf =new SimpleDateFormat("yyyy-MM-dd HH:mm:ss SSS");
			String dateNowStr = sdf.format(d);
			System.out.println(dateNowStr);

    		DBCollection coll = MongoInit.getColl("table_admin");
            BasicDBObject doc = new BasicDBObject();
            doc.put("id", "12345678");
            doc.put("time", dateNowStr);
            doc.put("data", "117.13172:029.77659:131.2580");
            doc.put("status", "0");
            coll.insert(doc);
            // 设定write concern，以便操作失败时得到提示
            coll.setWriteConcern(WriteConcern.SAFE);  

			BasicDBObject dsort = new BasicDBObject();
			dsort.put("time", -1);

			BasicDBObject searchDevice = new BasicDBObject();
			searchDevice.put("id", "12345678");
			DBCursor cursor = coll.find(searchDevice).sort(dsort);		

			List<DBObject> list = cursor.toArray();
			//ArrayList<SensorData> listSensorData=new ArrayList<SensorData>(list.size());

			ObjectMapper mapper = new ObjectMapper();
			String jsonfromList = null;
			try {
				//list转json
				jsonfromList = mapper.writeValueAsString(list);
			} catch (JsonProcessingException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
	        //System.out.println(jsonfromList);
//			for(int i=0;i<list.size();i++)
//			{
//				System.out.println((String) list.get(i).get("time"));
			//}

			//System.out.println(list.size()+","+listSensorData);//list的长度
//		    System.out.println(cursor.count());//计算结果的数量，类似于(mysql count()函数),不受limit的影响

//			while (cursor.hasNext()) {
//				System.out.println(cursor.next());
//			}
			System.out.println("The Search Query has Executed!");
		} catch (MongoException e) {
			e.printStackTrace();
		}
    }  

    public static void main(String[] args) {
    	String dbname="wlwdb";
    	String dbCollection="table_admin";
    	String dbCollection1="15257102317";
    	String dataID="12345678";
		MongoUtils tb=new MongoUtils();
		tb.testGetDBS();//查询所有数据库
		tb.getAllCollections();//查询所有表
//
//		tb.findOne(dbCollection);//查找第一条记录
		tb.testGpsData();
		tb.getAllDocuments(dbCollection);//获取制定表明的所有数据
		//tb.dropDatabase(dbname);//删除指定数据库
		//tb.delete(dbCollection,dataID);//删除制定表明和设备ID的数据
		//tb.dropCollection(dbCollection);// 删除一个表

		//tb.createIndex(dbCollection1);//创建索引
		//tb.getIndexInfo(dbCollection1);//获得表中所有索引
	}
}

MongoDBConfig.properties

#端口设置
DBPort=27017
#URL
DBUrl=localhost
#URL
DBName=wlwdb