prompt:
Recommended direct use tess4j, tess4j is a package tesseract, and easier to use
First introduced dependence
<!-- https://mvnrepository.com/artifact/org.bytedeco.javacpp-presets/tesseract -->
<dependency>
<groupId>org.bytedeco.javacpp-presets</groupId>
<artifactId>tesseract</artifactId>
<version>4.0.0-1.4.4</version>
</dependency>
Then you still have to download the installation file
https://sourceforge.net/projects/tesseract-ocr-alt/files/
If not open, then you go abroad download, download finished and then brought back. Or find domestic Mirror
For peace of mind, all the checkboxes
Administrator cmd to open the test
Command empty page !! errors should be images that are too low dpi resolution and
For example, I try to identify 
will not do
Enough to change a map
Although the recognition rate is not very good
But it shows that the code is no problem