mongodb基本的增删改查

一、基本的增删改查：

1、pom:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.wtyy</groupId>
	<artifactId>mongodbdemo</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.4.1.RELEASE</version>
	</parent>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>


		<dependency>
			<groupId>org.mongodb</groupId>
			<artifactId>mongodb-driver</artifactId>
			<version>3.4.1</version>
		</dependency>
		<dependency>
			<groupId>org.mongodb</groupId>
			<artifactId>bson</artifactId>
			<version>3.4.1</version>
		</dependency>
	
	</dependencies>

</project>

2、application.properties配置文件：

server.port = 8080
server.context-path = /wechat

3、连接util：这里可以连接多个服务，以逗号分隔，如：

String adressList = "localhost:27017,xxx.xxx.xx:port";

package com.wtyy.util;


import java.net.UnknownHostException;
import java.util.ArrayList;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.mongodb.DB;
import com.mongodb.MongoClient;
import com.mongodb.ReadPreference;
import com.mongodb.ServerAddress;
import com.mongodb.WriteConcern;

/**
 * mongodb管理器，提供DB对象。
 */
public class MongodbManager {


	private static final Logger LOGGER = LoggerFactory.getLogger("mongodbManager");
	
	private static MongoClient client;
	
	private static String dbnameTL = "wechatdb";

	static {
		String adressList =  "localhost:27017";

		try {
			 
				String[] addresses = adressList.split(",");
				ArrayList<ServerAddress> serverAddressList = new ArrayList<ServerAddress>();
				for(int j=0; j < addresses.length; j++){
					String[] address = addresses[j].split(":");
					ServerAddress mongoAddress = new ServerAddress(address[0], Integer.parseInt(address[1]));
					serverAddressList.add(mongoAddress);
				}
				client = new MongoClient(serverAddressList);
				client.setReadPreference(ReadPreference.primaryPreferred());
				LOGGER.info("读写分离未启动");
				
			
			client.setWriteConcern(WriteConcern.SAFE);
			LOGGER.info("写入安全模式启动");
		} catch (Exception e) {
			LOGGER.error(e.getMessage(), e);
		}
	}
	
	
	public static final DB DB_TL = client.getDB(dbnameTL);
}

4、dto:


package com.wtyy.dto;

import java.io.Serializable;

 
public class WechatGroup implements Serializable{

	/**
	 * 
	 */
	private static final long serialVersionUID = 3439169789270606886L;

	private String groupId;
	
	private String groupName;

	
	@Override
	public String toString() {
		return "WechatGroup [groupId=" + groupId + ", groupName=" + groupName
				+ "]";
	}
	
}

5、dao:


package com.wtyy.dao;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.bson.Document;
import org.springframework.stereotype.Repository;

import com.mongodb.BasicDBObject;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.wtyy.dto.WechatGroup;
import com.wtyy.util.MongodbManager;

@Repository("wechatDao")
public class WechatDao {
	
	private String collection = "wechat";
	
	//添加群
	public void addGroup(WechatGroup wechatGroup){
		DBCollection dbCollection = MongodbManager.DB_TL.getCollection(collection);

		DBObject documents = new BasicDBObject();
		documents.put("groupId", wechatGroup.getGroupId());
		documents.put("groupName", wechatGroup.getGroupName());
		dbCollection.insert(documents );
	}
	
	//通过群名称获取群id
	public String getWechatGroupIdByName(String wechatGroupName){
		String name = null;
		try{
			DBCollection dbCollection = MongodbManager.DB_TL.getCollection(collection);
			BasicDBObject cond = new BasicDBObject();
			cond.put("groupName", wechatGroupName);
			DBCursor dbCursor = dbCollection.find(cond);
			while(dbCursor.hasNext()){
				Map map = (Map)dbCursor.next();
				return (String) map.get("groupId");
			}
			return name;
		}catch (Exception e) {
			// TODO: handle exception
		}
		return name;
		
	}

	/**
	 * 查询所有
	 */
	public List<WechatGroup> getAll() {
		List<WechatGroup> list = new ArrayList<>();
		try{
			DBCollection dbCollection = MongodbManager.DB_TL.getCollection(collection);
			BasicDBObject cond = new BasicDBObject();
			DBCursor dbCursor = dbCollection.find(cond);
			
			while(dbCursor.hasNext()){
				Map map = (Map)dbCursor.next();
				WechatGroup wechatGroup = new WechatGroup();
				wechatGroup.setGroupId((String) map.get("groupId"));
				wechatGroup.setGroupName((String) map.get("groupName"));
				list.add(wechatGroup);
				
			}
			return list;
		}catch (Exception e) {
			// TODO: handle exception
		}
		return list;
	}
	
	
	/**
	 * 修改
	 */
	public void updateNameById(WechatGroup wechatGroup){
		List<WechatGroup> list = new ArrayList<>();
		try{
			DBCollection dbCollection = MongodbManager.DB_TL.getCollection(collection);
			//查询条件
			BasicDBObject query = new BasicDBObject();  
            query.put("groupId", wechatGroup.getGroupId());  
			
		    BasicDBObject updateObj = new BasicDBObject();  
		    BasicDBObject newDocument = new BasicDBObject();  
            newDocument.put("groupName", wechatGroup.getGroupName());  
            updateObj.put("$set", newDocument);  
            dbCollection.update(query, updateObj);
		}catch (Exception e) {
			// TODO: handle exception
		}
		
	}
	
	/**
	 * 删除
	 */
	public void deleteById(String groupId){
		try{
			DBCollection dbCollection = MongodbManager.DB_TL.getCollection(collection);
			//查询条件
			BasicDBObject query = new BasicDBObject();  
            query.put("groupId", groupId);  
			
            dbCollection.remove(query);
		}catch (Exception e) {
			// TODO: handle exception
		}
	}

}

6、测试：


package com.wtyy.test;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.wtyy.dao.WechatDao;
import com.wtyy.dto.WechatGroup;

@RestController
@RequestMapping("/test")
public class Test {
	@Autowired
	private WechatDao wechatDao;
	
	@RequestMapping("/add")
	public void add(String groupId,String groupName){
		WechatGroup group = new WechatGroup();
		group.setGroupId(groupId);
		group.setGroupName(groupName);
		wechatDao.addGroup(group);
	}

	@RequestMapping("/get")
	public String get(String groupName){
		return wechatDao.getWechatGroupIdByName(groupName);
	}
	

	@RequestMapping("/getAll")
	public List<WechatGroup> getAll(){
		return wechatDao.getAll();
	}
	
	@RequestMapping("/update")
	public void update(WechatGroup wechatGroup ){
		wechatDao.updateNameById(wechatGroup);
	}
	
	
	@RequestMapping("/delete")
	public void delete( String groupId){
		wechatDao.deleteById(groupId);
	}
}

二、

mongodb基本的增删改查

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