mongoDb基本java运用

test.sql

/*Drop Collections if exist */
db.menu.drop();

/* Initial Menu */
db.menu.insert({'name':'Roles','age':'12', 'url':'/account/getRoleList.do', 'group':'Account Managment','sequence':'01-01'});
db.menu.insert({'name':'Users','age':'22', 'url':'/account/getAccountList.do', 'group':'Account Managment','sequence':'01-02'});
db.menu.insert({'name':'Message Sending', 'age':'33','url':'/message/showSendMessage.do', 'group':'Messaging','sequence':'02-01'});
db.menu.insert({'name':'Message List', 'age':'15','url':'/message/messageList.do', 'group':'Messaging','sequence':'02-02'});

MongoDbTest

package com.cpkf.dao.mongo;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;

import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.Mongo;
import com.mongodb.MongoException;

public class MongoDbTest {
	public static void test(){
		Mongo mongo = null;
		DB db = null;
		InputStream is = null;
		BufferedReader br = null;
		StringBuffer sb = new StringBuffer();
		String temp = "";
		DBCursor dbCursor = null;
		try {
			//创建数据库连接
			mongo = new Mongo("localhost",27017);
			db = mongo.getDB("test");
			
			//添加用户并验证用户权限
			char[] pwd = {'r','o','o','t'};
			db.addUser("root",pwd);
			boolean flag = db.authenticate("root", pwd);
			System.out.println(flag);
			System.out.println("==================");
			
			//初始化数据库
//			is = MongoDbTest.class.getResourceAsStream("/conf/test.sql");
//			br = new BufferedReader(new InputStreamReader(is,"utf-8"));
//			while((temp = br.readLine()) != null){
//				sb.append(temp);
//			}
//			db.eval(sb.toString());
			
			//查看数据库列表
			for(String s : mongo.getDatabaseNames()){
				System.out.println(s);
			}
			System.out.println("==================");
			
			//删除数据库
			mongo.dropDatabase("admin");
			
			//查看当前库下数据集列表
			Set<String> collections = db.getCollectionNames();
			for(String coll : collections){
				System.out.println(coll);
			}
			System.out.println("==================");
			
			//得到一个数据集的索引列表
			DBCollection menuCollection = db.getCollection("menu");
			List<DBObject> indexList = menuCollection.getIndexInfo();
			for(DBObject object : indexList){
				System.out.println(object);
			}
			System.out.println("==================");
			
			//查询数据集第一条记录
			DBObject firstDbObject = menuCollection.findOne();
			System.out.println(firstDbObject);
			System.out.println("==================");
			
			//查询数据集所有记录
			List<DBObject> menuList = menuCollection.find().toArray();
			for(DBObject o : menuList){
				System.out.println(o);
			}
			System.out.println("==================");
			//以游标的形式
			dbCursor = menuCollection.find();
			while(dbCursor.hasNext()){
				System.out.println(dbCursor.next());
			}
			System.out.println("==================");
			
			//查询数据量
			System.out.println(menuCollection.find().count());
			System.out.println(menuCollection.find(new BasicDBObject("name","Roles")).count());
			System.out.println("==================");
			
			//带条件查询
			BasicDBObject bo = new BasicDBObject();
			bo.put("name", "Roles");
			dbCursor = menuCollection.find(bo);
			while(dbCursor.hasNext()){
				System.out.println(dbCursor.next());
			}
			System.out.println("==================");
			
			//分页查询-skip-跳过几条数据-limit-限制几条数据
			dbCursor = menuCollection.find().skip(2).limit(2);
			while(dbCursor.hasNext()){
				System.out.println(dbCursor.next());
			}
			System.out.println("==================");
			
			//比较查询"$gt"： 大于 "$gte"：大于等于 "$lt"： 小于 "$lte"：小于等于 "$in"： 包含 (支持数字比较，不支持字符串比较)
			BasicDBObject basicDBObject = new BasicDBObject();
			basicDBObject.put("age", new BasicDBObject("$gt",20).append("$lt", 30));
			dbCursor = menuCollection.find(basicDBObject);
			while(dbCursor.hasNext()){
				System.out.println(dbCursor.next());
			}
			System.out.println("==================");
			
			//插入数据
			List<DBObject> list = new ArrayList<DBObject>();
			for(int i = 0;i < 40;i ++){
				BasicDBObject dbs = new BasicDBObject();
				dbs.put("name", "hj" + i);
				dbs.put("age", i);
				BasicDBObject info = new BasicDBObject();
				info.put("x", i);
				info.put("y", i + 1);
				dbs.put("info", info);
				list.add(dbs);
			}
			//创建数据集，该语句重复执行抛出异常
//			db.createCollection("infoList",list.get(0));
			DBCollection infoCollection = db.getCollection("infoList");
//			infoCollection.insert(list);
			dbCursor = infoCollection.find();
			while(dbCursor.hasNext()){
				System.out.println(dbCursor.next());
			}
			System.out.println("==================");
			
			//正则表达式匹配查询CASE_INSENSITIVE-不区分大小写的匹配
			Pattern pattern = Pattern.compile("us",Pattern.CASE_INSENSITIVE);
			BasicDBObject pattDB = new BasicDBObject("name",pattern);
			dbCursor = menuCollection.find(pattDB);
			while(dbCursor.hasNext()){
				System.out.println(dbCursor.next());
			}
			System.out.println("==================");
		} catch (UnknownHostException e) {
			e.printStackTrace();
		} catch (MongoException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	public static void main(String[] args) {
		MongoDbTest.test();
	}
}