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This article mainly explains "what is lucene". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is lucene".

Luke is a third-party tool for Lucene search engines that facilitates development and diagnostics. It accesses the index of existing Lucene and allows you to display and modify and debug. Luke is the earliest provided by google, and it is very convenient to view the direct index of lucene. Before that, if you want to see all the contents of the index of your generated lucene, you need to write a lot of code to operate. What's more, maybe you just want to simply look at the total amount of data generated by the index, and you have to write a piece of code to count it. The emergence of luke is for the viewing and debugging of lucene. Provides a good interface operation tool, the index generated by lucene and solr can be very convenient to query and debug, not only that luke also provides a good plug-in mechanism, users can customize some functions to install and use, very flexible.

Using luke tools, you can not only view the index directly, but also add, delete, modify, and optimize the index, and you can also use different word splitters to test the word segmentation of specific fields, and so on, which is very similar to the functions provided by the management page of solr, but the focus of the two is not in the same place.

The use of the luke tool is also very simple. After downloading luke, put it directly under a drive letter, and then you can find the root path of the drive letter where the luke tool is located in the cmd window. You can start it with java-jar luke.jar. Some luke tools can be started by double-clicking directly, and you can try both ways when you use it. After starting, click the Browser button to find your index path point OK, and you can display the contents of your index. However, you have to pay attention to the version when using luke. Generally speaking, luke is backward compatible, but if you have a 4.x lucene index, then you can use the 3.x luke tool to check it. This is not possible, but vice versa.

Thank you for your reading, the above is the content of "what is lucene", after the study of this article, I believe you have a deeper understanding of what lucene is, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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