By Santhanam L. The PdfDocument is the main class in PDFOne Java. It represents a PDF document and allows you to create, read, and enhance PDF documents. It offers numerous methods for you to render PDF elements such as text, images, shapes, forms, watermarks, and annotations on to documents. Apr 28, 2017 There are several ways to read a plain text file in Java e.g. You can use FileReader, BufferedReader or Scanner to read a text file. Every utility provides something special e.g. BufferedReader provides buffering of data for fast reading, and Scanner provides parsing ability. It is not difficult to read PDF files in Java using libraries that are readily available. Reading PDF files allows you to write Java programs that can process the text in those files. One option for reading PDF files is the free, open-source PDFBox library available from Apache. IText pdf is the most convenient library with its latest version supporting HTML to Pdf, Image to Pdf as well as QR codes. The only drawback of the iText pdf library is that it is complex to work with it.
- PDFBox Tutorial
How to Read PDF File in Java Gather Needed Libraries. Download the Java JDK from Sun's website. Write the Code to Read PDFs. Right-click on the 'src' folder of your 'PrintPDF' project. Suppress Log4j Startup Error Message. Create a configuration file to suppress the Java logging system log4j.
- PDFBox Useful Resources
- Selected Reading
In the previous chapter, we have seen how to add text to an existing PDF document. In this chapter, we will discuss how to read text from an existing PDF document.
Extracting Text from an Existing PDF Document
Extracting text is one of the main features of the PDF box library. You can extract text using the getText() method of the PDFTextStripper class. This class extracts all the text from the given PDF document.
Following are the steps to extract text from an existing PDF document.
Step 1: Loading an Existing PDF Document
Load an existing PDF document using the static method load() of the PDDocument class. This method accepts a file object as a parameter, since this is a static method you can invoke it using class name as shown below.
Step 2: Instantiate the PDFTextStripper Class
The PDFTextStripper class provides methods to retrieve text from a PDF document therefore, instantiate this class as shown below.
Step 3: Retrieving the Text
You can read/retrieve the contents of a page from the PDF document using the getText() method of the PDFTextStripper class. To this method you need to pass the document object as a parameter. This method retrieves the text in a given document and returns it in the form of a String object.
Step 4: Closing the Document
Finally, close the document using the close() method of the PDDocument class as shown below.
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Example
Suppose, we have a PDF document with some text in it as shown below.
This example demonstrates how to read text from the above mentioned PDF document. Here, we will create a Java program and load a PDF document named new.pdf, which is saved in the path C:/PdfBox_Examples/. Save this code in a file with name ReadingText.java.
Compile and execute the saved Java file from the command prompt using the following commands.
Upon execution, the above program retrieves the text from the given PDF document and displays it as shown below.
- PDFBox Tutorial
- PDFBox Useful Resources
Read Pdf In Java
- Selected Reading
In the previous chapter, we have seen how to add text to an existing PDF document. In this chapter, we will discuss how to read text from an existing PDF document.
Extracting Text from an Existing PDF Document
Extracting text is one of the main features of the PDF box library. You can extract text using the getText() method of the PDFTextStripper class. This class extracts all the text from the given PDF document.
Following are the steps to extract text from an existing PDF document.
Step 1: Loading an Existing PDF Document
Read Pdf File In Java Using Pdfbox
Load an existing PDF document using the static method load() of the PDDocument class. This method accepts a file object as a parameter, since this is a static method you can invoke it using class name as shown below.
Step 2: Instantiate the PDFTextStripper Class
The PDFTextStripper class provides methods to retrieve text from a PDF document therefore, instantiate this class as shown below.
Step 3: Retrieving the Text
You can read/retrieve the contents of a page from the PDF document using the getText() method of the PDFTextStripper class. To this method you need to pass the document object as a parameter. This method retrieves the text in a given document and returns it in the form of a String object.
Step 4: Closing the Document
Finally, close the document using the close() method of the PDDocument class as shown below.
Example
Suppose, we have a PDF document with some text in it as shown below.
This example demonstrates how to read text from the above mentioned PDF document. Here, we will create a Java program and load a PDF document named new.pdf, which is saved in the path C:/PdfBox_Examples/. Save this code in a file with name ReadingText.java.
Compile and execute the saved Java file from the command prompt using the following commands.
Upon execution, the above program retrieves the text from the given PDF document and displays it as shown below.
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