最近在做项目的时候，遇到一个问题，需要在内存中对从不同地方收集起来的 Properties 文件做处理，在处理之后，要合并成一个 单独的 Properties 并输出为 inputStream ,做后续的处理。如果单纯从 properties文件转换成 inputStream 应该是比较容易的事。在内存中处理合并properties 也比较简单，但 从Properties 对象转换成 inputStream 我硬是冤枉了两个小时。很郁闷，不过最后还是找到了方法，其重点就是 通过outputStream 作为中转来实现，参考了网上的一个 inputStream 与 outputStream 与 String 对象之间相互转换的代码，一起写在里面.

Date: 2013-10-31 View: 1520

In this article, we will show you how to loop a List and a Map with the new Java 8 forEach statement.

Date: 2019-08-17 View: 1520

In Java 8, you can use Files.lines to read file as Stream.

Date: 2019-08-17 View: 1520

In this article, we will show you a few ways to join a Java Array.

Date: 2019-08-17 View: 1520

In this tutorial, we will show you few Java 8 examples to demonstrate the use of Streams filter(), collect(), findAny() and orElse()

Date: 2019-08-17 View: 1520

Few Java examples to show you how to filter a Map with Java 8 stream API.

Date: 2019-08-17 View: 1520

Few Java 8 examples to show you how to convert a List of objects into a Map, and how to handle the duplicated keys.

Date: 2019-08-17 View: 1520

In this article, we will show you how to use Java 8 Stream Collectors to group by, count, sum and sort a List.

Date: 2019-08-17 View: 1520

In Java 8, Stream cannot be reused, once it is consumed or used, the stream will be closed.

Date: 2019-08-17 View: 1520

In Java 8, you can either use Arrays.stream or Stream.of to convert an Array into a Stream.

Date: 2019-08-17 View: 1520

In Java 8, Stream can hold different data types, for examples:

Date: 2019-08-17 View: 1520

Review a Stream containing null values.

Date: 2019-08-17 View: 1520

A Java 8 example to show you how to convert a Stream to a List via Collectors.toList

Date: 2019-08-17 View: 1520

Java 8 How to sort a Map

Java 8 Stream examples to sort a Map, by keys or by values.

Date: 2019-08-17 View: 1520

In Java 8, stream().map() lets you convert an object to something else. Review the following examples :

Date: 2019-08-11 View: 1520