使用PDFBox操作PDF 1.6版本时会出现错误: (1)pdfbox0.7.3 java.lang.NullPointerException at org.pdfbox.pdmodel.PDPageNode.getCount(PDPageNode.java:116) at org.pdfbox.pdmodel.PDDocument.getNumberOfPages(PDDocument.java:772) (2)pdfbox0.8 org.apache.pdfbox.exceptions.
1 State of the art 3 1.1 What is search? 4 Categorizing information 5 ■ Using a detailed search screen 5 Using a user-friendly search box 7 ■ Mixing search strategies 7 Choosing a strategy: the first step on a long road 8 1.2 Pitfalls of search engi