mongodb基本的增删改查

ゝ一世哀愁。 2022-02-16 12:53 481阅读 0赞

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);
    	}
    }

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二、

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