我有一些pdf文件,使用pdfbox我已将它们转换为文本并存储到文本文件中,现在从我要删除的文本文件
>超链接
>所有特殊字符
>空行
> PDF脚本的pdf文件
>“1)”,“2)”,“a)”,“子弹”等
我希望逐行获得有效的文本,如下所示：
We propose OntoGain, a method for ontology learning from multi-word concept terms extracted from plain text. OntoGain follows an ontology learning process dened by distinct processing layers. Building upon plain term extraction a con-cept hierarchy is formed by clustering the extracted concepts. The derived term taxonomy is then enriched with non-taxonomic relations. Several dierent state-of-the-art methods have been examined for implementing each layer. OntoGain is based upon multi-word term concepts, as multi-word or compound terms are vested with more solid and distinctive semantics than plain single word terms. We opted for a hierarchical clustering method and Formal Concept Analysis (FCA) algorithm for building the term taxonomy. Furthermore an association rule algorithm is applied for revealing non-taxonomic relations. A method which tries to carry out the most appropriate generalization level between a relation’s concepts is also implemented. To show proof of concept, a system prototype is implemented. The OntoGain allows transformation of the derived ontology into OWL using Jena Semantic Web Frame-work1. OntoGain is applied on two separate data sources a medical and computer corpus and its results are compared with similar results obtained by Text2Onto, a state-of-the-art-ontology learning method. The analysis of 11.5 CCD1.1 results indicates that OntoGain performs better than Text2Onto in terms of precision extracts more correct concepts while being more selective extracts fewer but more reasonable concepts.
我怎样才能做到这一点？
解决方法:
使用pdfbox,我们可以实现这个目标
示例：
public static void main(String args[]) {
PDFParser parser = null;
PDDocument pdDoc = null;
COSDocument cosDoc = null;
PDFTextStripper pdfStripper;
String parsedText;
String fileName = "E:\\Files\\Small Files\\PDF\\JDBC.pdf";
File file = new File(fileName);
try {
parser = new PDFParser(new FileInputStream(file));
parser.parse();
cosDoc = parser.getDocument();
pdfStripper = new PDFTextStripper();
pdDoc = new PDDocument(cosDoc);
parsedText = pdfStripper.getText(pdDoc);
System.out.println(parsedText.replaceAll("[^A-Za-z0-9. ]+", ""));
} catch (Exception e) {
e.printStackTrace();
try {
if (cosDoc != null)
cosDoc.close();
if (pdDoc != null)
pdDoc.close();
} catch (Exception e1) {
e1.printStackTrace();
}
}
}
标签：java,pdf,pdfbox 来源： https://codeday.me/bug/20190926/1820964.html
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