java中mongo数据库中所有集合的列表 [英] List of all collections in mongo database in java

问题描述

如何获取数据库中所有集合的列表?

how can I get a list of all the collections in the database?

• 数据库 - mongodb;
• 语言 - java;
• ide - 日食；

推荐答案

获取集合列表每个数据库都有零个或多个集合.您可以从数据库中检索它们的列表(并打印出其中的任何内容):

Getting A List Of Collections Each database has zero or more collections. You can retrieve a list of them from the db (and print out any that are there) :

Set<String> colls = db.getCollectionNames();

for (String s : colls) {
System.out.println(s);
}

编辑:正如@Andrew 的回答所建议的，更新的 Java 客户端使用这个:

Edit : As suggested in @Andrew's answer, updated java client uses this :

/**
 * Gets the names of all the collections in this database.
 *
 * @return an iterable containing all the names of all the collections in this database
 */
MongoIterable<String> listCollectionNames();

并根据文档类型获取可迭代集合:

and getting the iterable collection based on the document type :

/**
 * Finds all the collections in this database.
 *
 * @param resultClass the class to decode each document into
 * @param <TResult>   the target document type of the iterable.
 * @return the list collections iterable interface
 * @mongodb.driver.manual reference/command/listCollections listCollections
 */
<TResult> ListCollectionsIterable<TResult> listCollections(Class<TResult> resultClass);

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