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在 Spring Data JPA 文档中它说关于流:
A Stream potentially wraps underlying data store specific resources and must therefore be closed after usage. You can either manually close the Stream using the close() method or by using a Java 7 try-with-resources block.
如果我使用 forEach、计数或其他终端操作处理流，它应该已经关闭(并且不会再次重用)并且我不必在额外的尝试中包装流-resources-block(假设我的 block 没有抛出任何异常)，还是我错了？
最佳答案
Java APIs描述这个主题如下:
Streams have a
BaseStream.close()method and implementAutoCloseable, but nearly all stream instances do not actually need to be closed after use. Generally, only streams whose source is an IO channel (such as those returned byFiles.lines(Path, Charset))will require closing. Most streams are backed by collections, arrays, or generating functions, which require no special resource management. (If a stream does require closing, it can be declared as a resource in a try-with-resources statement.)
另请注意 Files.lines(Path, Charset)) 的 API :
The returned stream encapsulates a
Reader.If timely disposal of file system resources is required, the try-with-resources construct should be used to ensure that the stream'sclosemethod is invoked after the stream operations are completed.
底线是:如果流对应的资源在正常情况下需要在使用后关闭(如 IO)，请在 try-with-resources 语句中使用它。
关于java - 我是否必须在 try-with-resources-block 中关闭已终止的流式查询结果？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37659872/