/**
* MongoDB Operation class
* @author Mr.Li
* @date 2022-12-05
*/
public class MongoDbHelper {
@Autowired
private MongoTemplate mongoTemplate;
/**
* Save Individual Objects
*
* @param t
* @param <T>
* @return
*/
public <T> T save(T t) {
return mongoTemplate.insert(t);
}
/**
* Store the object to the specified collectionName
* @param objectToSave
* @param collectionName
* @param <T>
* @return
*/
public <T> T save(T objectToSave, String collectionName){
return mongoTemplate.insert(objectToSave,collectionName);
}
/**
* Batch save track data
*
* @param list
* @param collectionName
* @return
*/
public <T> Collection<T> batchSave(Collection<T> list, String collectionName) {
return mongoTemplate.insert(list,collectionName);
}
/**
* Query Data
*
* @param query
* @param tClass
* @param <T>
* @return
*/
public <T> List<T> find(Query query, Class<T> tClass) {
return mongoTemplate.find(query, tClass);
}
/**
* Collection specified by query data
*
* @param query
* @param tClass
* @param <T>
* @return
*/
public <T> List<T> find(Query query, Class<T> tClass, String collectionName) {
return mongoTemplate.find(query, tClass,collectionName);
}
/**
* Pagination query
* @param query query criteria
* @param pageNum Current Page
* @param pageSize Number of entries per page
* @param sortField Sorted Field
* @param sortType 1:asc;0:desc
* @param tClass to class
* @param collectionName collection name
* @param <T>
* @return
*/
public <T> MongoPage findByPage(Query query,int pageNum,int pageSize,String sortField,int sortType, Class<T> tClass, String collectionName) {
int count = (int) mongoTemplate.count(query, tClass, collectionName);
if(sortType==1){
query.with(Sort.by(Sort.Order.asc(sortField)));
}else {
query.with(Sort.by(Sort.Order.desc(sortField)));
}
//Set starting number
query.skip((pageNum - 1) * pageSize);
//Set the number of queries
query.limit(pageSize);
//Query the current page data set
List<T> taskList = mongoTemplate.find(query, tClass,collectionName);
int size=count % pageSize == 0 ? count / pageSize : count / pageSize + 1;
MongoPage page=new MongoPage();
page.setTotal(count);
page.setSize(size);
page.setData(taskList);
return page;
}
/**
* 查询前几条数据
* @param query
* @param limitNum 前几条
* @param sortField 排序字段
* @param sortType 0:倒序；1:正序
* @param tClass
* @param collectionName
* @param <T>
* @return
*/
public <T> List<T> findTop(Query query,Integer limitNum,String sortField,int sortType, Class<T> tClass, String collectionName){
if(sortType==1){
query.with(Sort.by(Sort.Order.asc(sortField)));
}else {
query.with(Sort.by(Sort.Order.desc(sortField)));
}
query.limit(limitNum);
return mongoTemplate.find(query, tClass,collectionName);
}
/**
* 查询一条数据
* @param query
* @param sortField
* @param sortType
* @param tClass
* @param collectionName
* @param <T>
* @return
*/
public <T> List<T> findOne(Query query,String sortField,int sortType, Class<T> tClass, String collectionName){
if(sortType==1){
query.with(Sort.by(Sort.Order.asc(sortField)));
}else {
query.with(Sort.by(Sort.Order.desc(sortField)));
}
//Set the number of queries
query.limit(1);
//Query the current page data set
List<T> taskList = mongoTemplate.find(query, tClass,collectionName);
return taskList;
}
/**
* Query All
*
* @param tClass
* @param <T>
* @return
*/
public <T> List<T> findAll(Class<T> tClass) {
return mongoTemplate.findAll(tClass);
}
/**
* Query all specified collections
*
* @param tClass
* @param collectionName
* @param <T>
* @return
*/
public <T> List<T> findAll(Class<T> tClass,String collectionName) {
return mongoTemplate.findAll(tClass,collectionName);
}
/**
* create collection
* @param collName
* @param indexList
* @return
*/
public boolean createCollection(String collName, List<Map<String,Integer>> indexList){
try {
if (mongoTemplate.collectionExists(collName)) {
return true;
}
//Index collection to be created
List<IndexModel> indexModels = new ArrayList<>();
for (Map<String, Integer> indexMap : indexList) {
BasicDBObject index = new BasicDBObject();
for (String key : indexMap.keySet()) {
index.put(key, indexMap.get(key));
}
indexModels.add(new IndexModel(index));
}
mongoTemplate.createCollection(collName).createIndexes(indexModels);
return true;
}catch (Exception e){
return false;
}
}
/**
* Update the first result set returned by the query
* @param query
* @param update
* @param collectionName
* @return
*/
public boolean updateFirst(Query query, Update update, String collectionName){
try {
mongoTemplate.updateFirst(query, update, collectionName);
return true;
}catch (Exception e){
return false;
}
}
/**
* Update all returned result sets
* @param query
* @param update
* @param collectionName
* @return
*/
public boolean updateMulti(Query query, Update update, String collectionName){
try {
mongoTemplate.updateMulti(query, update, collectionName);
return true;
}catch (Exception e){
return false;
}
}
/**
* If the update object does not exist, add it
* @param query
* @param update
* @param tClass
* @param <T>
* @param collectionName
* @return
*/
public <T> boolean upsert(Query query, Update update, Class<T> tClass,String collectionName){
try {
mongoTemplate.upsert(query, update, tClass,collectionName);
return true;
}catch (Exception e){
return false;
}
}
/**
* 存在则更新不存在则创建
* @param query
* @param update
* @param collectionName
* @return
*/
public boolean upsert(Query query, Update update, String collectionName){
try {
mongoTemplate.upsert(query, update,collectionName);
return true;
}catch (Exception e){
return false;
}
}
/**
* 汇总查询
* @param aggregation
* @param tClass
* @param collectionName
* @param <T>
* @return
*/
public <T> List<T> groupQuery(Aggregation aggregation,Class<T> tClass,String collectionName){
AggregationResults<T> maps = mongoTemplate.aggregate(aggregation, collectionName, tClass);
return maps.getMappedResults();
}
/**
* 查总条数
* @param query
* @param collectionName
* @return
*/
public long queryCount(Query query, String collectionName){
return mongoTemplate.count(query, collectionName);
}
}
3.分页实体类MongoPage
java复制代码
/**
* MongoDB paged query returns result set
* @author Mr.Li
* @date 2023-01-11
*/
@Data
public class MongoPage {
/**
* Total number of data
*/
private Integer total;
/**
* Page count
*/
private Integer size;
/**
* Data result set per page
*/
private Object data;
}