PDF Guru是一个通用型PDF文件处理工具，包含PDF合并、拆分、旋转、水印、加密、转换等20多项常用功能，完全开源，个人免费使用，界面简洁，简单易用。
Tess4J是对Tesseract OCR API.的Java JNA 封装。使java能够通过调用Tess4J的API来使用Tesseract OCR。 支持的格式：TIFF,JPEG,GIF,PNG,BMP,JPEG,and PDF 基本API的演示
用于测试jenkins
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