今天在给新写的BLOG增加 sitemap.xml, 在其中会用到查询 文章的编号和时间字段。因为如果直接用 Entity.object.all() 的话，性能很差，没必要在读取站点map的时候，也把内容读出来，我只需要ID，时间，以及拼凑出来的URL而已

Date: 2020-07-06 View: 1520

以前在java中对map进行排序通常会自己单独定义一个方法出来处理，特别是根据 value  进行排序更是麻烦一些，但在java 8 总似乎可以用简单一点的方法处理了，直接用测试代码, 在本文最后也记录以前传统方式的排序方法.

Date: 2016-08-16 View: 1520

Map 这个在java 程序中最常见的类型，通常使用的是其具体的实现 hashmap 来定义数据。但存储在hashmap里面的数据，经常会根据需要，进行排序处理，在这里总结了两种方法来排序，如果以后发现其他的，继续增加1. 根据 map 的 key 值来排序 ( 利用treemap 特性实现 )2. 根据 map 的 value 值来排序( 利用 list 特性实现 )

Date: 2012-11-21 View: 1520

Spring MVC find location using IP Address (jQuery + Google Map)

In this tutorial, we show you how to find a location using an IP address, with the following technologies :

Date: 2019-08-17 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, you can use Map.containsKey() to check if a key exists in a Map.

Date: 2019-08-17 View: 1520

In Java, you can use System.getenv() to return a Map with all the environment variables.

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

Date: 2019-08-17 View: 1520

Forget about JUnit assertEquals(), to test a Map, uses the more expressive IsMapContaining class from hamcrest-library.jar

Date: 2019-08-17 View: 1520

Few Java examples to convert a Map to a List

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

A Java 8 example to display all the ZoneId and its OffSet hours and minutes.

Date: 2019-08-17 View: 1520

Java multi threads example to show you how to use Semaphore and Mutex to limit the number of threads to access resources.

Date: 2019-08-11 View: 1520