ＭongoDB之使用案例(項目總結)

時間  2019-11-13
標籤 mongodb 使用 案例 項目 總結 欄目 MongoDB 简体版
原文   原文鏈接

項目中使用了mongodb來存儲熱點文章的url和一些信息java

１.maven座標

<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-lang3</artifactId>
			<version>3.3.2</version>
		</dependency>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-collections4</artifactId>
			<version>4.0</version>
		</dependency>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-collections4</artifactId>
			<version>4.0</version>
		</dependency>
		<dependency>
			<groupId>org.apache.httpcomponents</groupId>
			<artifactId>httpclient</artifactId>
			<version>4.3</version>
		</dependency>
		<dependency>
			<groupId>commons-io</groupId>
			<artifactId>commons-io</artifactId>
			<version>2.4</version>
		</dependency>
		<dependency>
			<groupId>commons-fileupload</groupId>
			<artifactId>commons-fileupload</artifactId>
			<version>1.3.1</version>
		</dependency>
		<dependency>
			<groupId>commons-codec</groupId>
			<artifactId>commons-codec</artifactId>
			<version>1.10</version>
		</dependency>
		<dependency>
			<groupId>commons-logging</groupId>
			<artifactId>commons-logging</artifactId>
			<version>1.1.3</version>
		</dependency>
		<dependency>
			<groupId>commons-beanutils</groupId>
			<artifactId>commons-beanutils</artifactId>
			<version>1.9.2</version>
		</dependency>
<!-- mongodb -->
<dependency>
	<groupId>org.springframework.data</groupId>
	<artifactId>spring-data-mongodb</artifactId>
	<version>1.7.2.RELEASE</version>
<dependency>

 

Spring配置spring

<!-- mongoDB -->
	<bean id="mongoClientURI" class="com.mongodb.MongoClientURI">
		<constructor-arg value="${mongodb.uri}" />
	</bean>
	<bean id="mongoDbFactory" class="org.springframework.data.mongodb.core.SimpleMongoDbFactory">
		<constructor-arg ref="mongoClientURI" />
	</bean>
	<mongo:mapping-converter id="converter" />
	<bean id="mongo" class="org.springframework.data.mongodb.core.MongoTemplate">
		<constructor-arg ref="mongoDbFactory" />
		<constructor-arg ref="converter" />
	</bean>

 

mongodb操做字符mongodb

/** 
 * MongoDB keywords for various query operations 
 * 
 */  
public class QueryOperators {  
    public static final String OR = "$or";  
    public static final String AND = "$and";  
  
    public static final String GT = "$gt";  
    public static final String GTE = "$gte";  
    public static final String LT = "$lt";  
    public static final String LTE = "$lte";  
  
    public static final String NE = "$ne";  
    public static final String IN = "$in";  
    public static final String NIN = "$nin";  
    public static final String MOD = "$mod";  
    public static final String ALL = "$all";  
    public static final String SIZE = "$size";  
    public static final String EXISTS = "$exists";  
    public static final String ELEM_MATCH = "$elemMatch";  
  
    // (to be implemented in QueryBuilder)  
    public static final String WHERE = "$where";  
    public static final String NOR = "$nor";  
    public static final String TYPE = "$type";  
    public static final String NOT = "$not";  
  
    // geo operators  
    public static final String WITHIN = "$within";  
    public static final String NEAR = "$near";  
    public static final String NEAR_SPHERE = "$nearSphere";  
    public static final String BOX = "$box";  
    public static final String CENTER = "$center";  
    public static final String POLYGON = "$polygon";  
    public static final String CENTER_SPHERE = "$centerSphere";  
    // (to be implemented in QueryBuilder)  
    public static final String MAX_DISTANCE = "$maxDistance";  
    public static final String UNIQUE_DOCS = "$uniqueDocs";  
  
  
    // meta query operators (to be implemented in QueryBuilder)  
    public static final String RETURN_KEY = "$returnKey";  
    public static final String MAX_SCAN = "$maxScan";  
    public static final String ORDER_BY = "$orderby";  
    public static final String EXPLAIN =  "$explain";  
    public static final String SNAPSHOT = "$snapshot";  
    public static final String MIN = "$min";  
    public static final String MAX = "$max";  
    public static final String SHOW_DISK_LOC = "$showDiskLoc";  
    public static final String HINT = "$hint";  
    public static final String COMMENT = "$comment";  
}

２. MongoDao.java　公用mongodb類可繼承

import java.lang.reflect.Field;

import javax.annotation.Resource;

import org.apache.commons.beanutils.BeanUtils;
import org.springframework.data.mongodb.core.MongoOperations;

import com.mongodb.BasicDBObject;
import com.mongodb.DBObject;

public abstract class MongoDao {
    private static final String ID_COLLECTION = "id_generator";

    @Resource
    protected MongoOperations mongo;

    public Long nextId(String collectionName) {
        DBObject obj =
                mongo.getCollection(ID_COLLECTION).findAndModify(new BasicDBObject("coll", collectionName), null, null,
                        false, new BasicDBObject("$inc", new BasicDBObject("id", 1L)), true, true);
        return (Long) obj.get("id");
    }

    public static <T> T toEntity(DBObject dbo, Class<T> entityClazz) {
        if (dbo == null) {
            return null;
        }

        T entity = null;
        try {
            entity = entityClazz.newInstance();

            Field[] fields = entityClazz.getDeclaredFields();
            for (Field field : fields) {
                String fn = field.getName();
                Object fv = dbo.get(fn);
                if (fv != null) {
                    BeanUtils.setProperty(entity, fn, fv);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return entity;
    }
    
    public static DBObject buildFields(String... fieldNames) {
        DBObject fields = new BasicDBObject();
        for (String fn : fieldNames) {
            fields.put(fn, 1);
        }
        return fields;
    }
}

3.HotArticleDao.java　

public interface HotArticleDao {
    
    void insert(HotArticle hotArticle);
    
    void update(HotArticle hotArticle);
    
    public void updateByUrlMd5(HotArticle hotArticle);
    
    List<HotArticle> findListByParam(Date beginTime, Date endTime,Integer siteId,Integer sourceId,String url,Pagination page);
    
    Long findCount(Date beginTime, Date endTime,Integer siteId,Integer sourceId,String url);
    
    void deleteAllBefore(Date time);
}

4.HotArticleDaoImpl　mongdb具體操做

@Repository
public class HotArticleDaoImpl extends MongoDao implements HotArticleDao {
    
    protected static final String COLLECTION = "sp_hotarticle";
    
    //保存
    @Override
    public void insert(HotArticle hotArticle) {
        hotArticle.setArtId(nextId(COLLECTION));
        mongo.insert(hotArticle,COLLECTION);
    }
    
    //根據id更新
    @Override
    public void update(HotArticle hotArticle) {

        DBObject query = new BasicDBObject("artId", hotArticle.getArtId());

        DBObject o = new BasicDBObject();
        mongo.getConverter().write(hotArticle, o);

        mongo.getCollection(COLLECTION).update(query, new BasicDBObject("$set", o));
      //有則更新，沒有則插入
      //mongo.getCollection(COLLECTION).update(query, new BasicDBObject("$set", o),true,true);
        
    }
    
    //更具url md5更新
    @Override
    public void updateByUrlMd5(HotArticle hotArticle) {

        DBObject query = new BasicDBObject("urlMd5", hotArticle.getUrlMd5());

        DBObject o = new BasicDBObject();
        mongo.getConverter().write(hotArticle, o);

        mongo.getCollection(COLLECTION).update(query, new BasicDBObject("$set", o));
        
    }
    
    //分頁查詢，帶條件
    @Override
    public List<HotArticle> findListByParam(Date beginTime, Date endTime,Integer siteId,Integer sourceId,String url,Pagination page){
        
        endTime=DateUtils.addDays(endTime, 1);
        
        DBObject query =
                new BasicDBObject("createdTime",
                        new BasicDBObject(QueryOperators.GTE, beginTime).append(QueryOperators.LTE,endTime));
        
        if (sourceId != null && sourceId !=0) {
            query.put("sourceId", sourceId);
           
        }
        
        if (siteId != null && siteId !=0) {
            query.put("siteId", siteId);
            
        }
        
        if (StringUtils.isNotBlank(url)) {
            query.put("url", Pattern.compile("^.*" + url + ".*$", Pattern.CASE_INSENSITIVE));
            
        }
        
        DBObject fields =
                buildFields("artId","siteId","hotSourceId","sourceUrl","newId", "url", "urlMd5","createdTime","status");
       
        DBCursor cursor =
                mongo.getCollection(COLLECTION).find(query, fields).skip(page.getStartItem())
                .limit(page.getPageSize()).sort(new BasicDBObject("createdTime",-1));
   
        
        List<HotArticle> result = new LinkedList<HotArticle>();
        while (cursor.hasNext()) {
            DBObject o = cursor.next();
            result.add(toEntity(o, HotArticle.class));
        }
        
        
        return result;
    }

  
    //刪除一個時間點之前的數據
    @Override
    public void deleteAllBefore(Date time) {
       DBObject query =
                new BasicDBObject("createdTime",
                        new BasicDBObject(QueryOperators.LT, time));
       mongo.getCollection(COLLECTION).remove(query);
    
    }

　　　//統計
    @Override
    public Long findCount(Date beginTime, Date endTime, Integer siteId, Integer sourceId, String url) {
        endTime=DateUtils.addDays(endTime, 1);
        
        DBObject query =
                new BasicDBObject("createdTime",
                        new BasicDBObject(QueryOperators.GTE, beginTime).append(QueryOperators.LTE,
                                endTime));
        
        if (sourceId != null) {
            query.put("sourceId", sourceId);
        }
        
        if (siteId != null && siteId !=0) {
            query.put("siteId", siteId);
        }
        
        if (StringUtils.isNotBlank(url)) {
            query.put("url", Pattern.compile("^.*" + url + ".*$", Pattern.CASE_INSENSITIVE));
        }
        
        Long count = mongo.getCollection(COLLECTION).count(query);
        return count;
    }

}

５.HotArticle.java　實體類

public class HotArticle implements Serializable {

    private static final long serialVersionUID = -312854320019484371L;
    
    private Long     artId;   // mongdb自增id
    private Integer siteId;  // 網站id
    private Integer hotSourceId;// 熱點二級內容源id
    private String  sourceUrl;  
    private Long    newId;   // 在sp_content表中id
    private String  url;    // 熱點文章url
    private String  urlMd5; // url md5
    private Date     createdTime; // 建立時間
    private Integer  status;  //０，未抓取，１，已抓取
    
    
    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public Date getCreatedTime() {
        return createdTime;
    }

    public void setCreatedTime(Date createdTime) {
        this.createdTime = createdTime;
    }

    public String getUrlMd5() {
        return urlMd5;
    }

    public void setUrlMd5(String urlMd5) {
        this.urlMd5 = urlMd5;
    }

    public Long getNewId() {
        return newId;
    }

    public void setNewId(Long newId) {
        this.newId = newId;
    }

    public Long getArtId() {
        return artId;
    }

    public void setArtId(Long artId) {
        this.artId = artId;
    }


    public Integer getSiteId() {
        return siteId;
    }

    public void setSiteId(Integer siteId) {
        this.siteId = siteId;
    }

    public Integer getStatus() {
        return status;
    }

    public void setStatus(Integer status) {
        this.status = status;
    }

    public String getSourceUrl() {
        return sourceUrl;
    }

    public void setSourceUrl(String sourceUrl) {
        this.sourceUrl = sourceUrl;
    }

    public Integer getHotSourceId() {
        return hotSourceId;
    }

    public void setHotSourceId(Integer hotSourceId) {
        this.hotSourceId = hotSourceId;
    }

}
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