在java中尝试使用资源和返回语句 [英] Try-with-resources and return statements in java

问题描述

我想知道在 try-with-resources 块中放置 return 语句是否会阻止资源自动关闭。

I'm wondering if putting a return statement inside a try-with-resources block prevents the resource to be automatically closed.

try(Connection conn = ...) {
    return conn.createStatement().execute("...");
}

如果我写这样的话， Connection 被关闭？在Oracle文档中，声明：

If I write something like this will the Connection be closed? In the Oracle documentation it is stated that:

try-with-resources语句确保在语句结束时关闭每个资源。

The try-with-resources statement ensures that each resource is closed at the end of the statement.

如果由于返回语句而从未到达语句的结尾会发生什么？

What happens if the end of the statement is never reached because of a return statement?

推荐答案

基于 Oracle的教程，[资源]将被关闭，无论try语句是正常完成还是突然完成。它从异常中定义突然。

Based on Oracle's tutorial, "[the resource] will be closed regardless of whether the try statement completes normally or abruptly". It defines abruptly as from an exception.

返回尝试是突然完成的示例，由 JLS定义14.1 。

Returning inside the try is an example of abrupt completion, as defined by JLS 14.1.

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