類型	描述
PdfDocument Class	Represents a pdf document model.
PdfDocument. loadFromFile (string filename) Method	Loads a PDF document.
PdfTableExtractor Class	Represents the PDF table extractor.
PdfTable Class	Defines a PDF table.
PdfTableExtractor. extractTable (int pageIndex) Method	Extracts table from page.
PdfTable.getText(int rowIndex,int columnIndex) Method	Gets Text in cell.
FileWriter. write() Method	Saves extracted text in table to a .txt file.

二、環(huán)境配置

IntelliJ IDEA 2018(JDK 1.8.0)
PDF 測試文檔
PDF Jar包：Spire.PDF for Java Version: 4.10.2

Jar包的兩種導(dǎo)入方法：

1. 手動(dòng)導(dǎo)入

將jar包下載到本地，解壓。然后執(zhí)行如下步驟來手動(dòng)導(dǎo)入：

2. Maven倉庫下載導(dǎo)入

如果使用maven，需在pom.xml中配置maven路徑，指定依賴，如下：

<repositories>
    <repository>
        <id>com.e-iceblue</id>
        <url>https://repo.e-iceblue.cn/repository/maven-public/</url>
    </repository>
</repositories>
<dependencies>
    <dependency>
        <groupId>e-iceblue</groupId>
        <artifactId>spire.pdf</artifactId>
        <version>4.10.2</version>
    </dependency>
</dependencies>

三、讀取PDF中的表格

import com.spire.pdf.*;
import com.spire.pdf.utilities.PdfTable;
import com.spire.pdf.utilities.PdfTableExtractor;

import java.io.FileWriter;
import java.io.IOException;

public class ExtractTable {
    public static void main(String[] args)throws IOException {
        //加載PDF文檔
        PdfDocument pdf = new PdfDocument();
        pdf.loadFromFile("test.pdf");

        //創(chuàng)建StringBuilder類的實(shí)例
        StringBuilder builder = new StringBuilder();

        //抽取表格
        PdfTableExtractor extractor = new PdfTableExtractor(pdf);
        PdfTable[] tableLists ;
        for (int page = 0; page < pdf.getPages().getCount(); page++)
        {
            tableLists = extractor.extractTable(page);
            if (tableLists != null && tableLists.length > 0)
            {
                for (PdfTable table : tableLists)
                {
                    int row = table.getRowCount();
                    int column = table.getColumnCount();
                    for (int i = 0; i < row; i++)
                    {
                        for (int j = 0; j < column; j++)
                        {
                            String text = table.getText(i, j);
                            builder.append(text+" ");
                        }
                        builder.append("\r\n");
                    }
                }
            }
        }

        //將提取的表格內(nèi)容寫入txt文檔
        FileWriter fileWriter = new FileWriter("ExtractedTable.txt");
        fileWriter.write(builder.toString());
        fileWriter.flush();
        fileWriter.close();
    }
}

表格內(nèi)容讀取結(jié)果：