java识别pdf账单并且导入到数据库实现

首先，需要添加 Apache PDFBox 和 JDBC 相应的依赖，可以在 Maven 中添加以下依赖：

<dependencies>
    <dependency>
        <groupId>org.apache.pdfbox</groupId>
        <artifactId>pdfbox</artifactId>
        <version>2.0.23</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.23</version>
    </dependency>
</dependencies>

然后，可以编写以下 Java 代码实现：

import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.List;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.text.PDFTextStripper;
import org.apache.pdfbox.text.TextPosition;

public class PdfToDatabase {
    
    private static final String DB_URL = "jdbc:mysql://localhost:3306/mydatabase";
    private static final String DB_USER = "root";
    private static final String DB_PASSWORD = "password";
    
    private static final String INSERT_SQL = "INSERT INTO transactions (date, amount, type) VALUES (?, ?, ?)";
    
    public static void main(String[] args) {
        File file = new File("example.pdf");
        try (PDDocument document = PDDocument.load(file)) {
            PDFTextStripper stripper = new PDFTextStripper() {
                @Override
                protected void startPage(PDPage page) throws IOException {
                    // Start a new line for each page
                    writeLineSeparator();
                }
                
                @Override
                protected void writeString(String text, List<TextPosition> textPositions) throws IOException {
                    // Extract the transaction information from each line
                    // Here you can implement your own logic to extract the information correctly
                    String date = null;
                    String amount = null;
                    String type = null;
                    for (TextPosition textPosition : textPositions) {
                        String line = textPosition.getUnicode();
                        if (line.contains("Date")) {
                            date = line.substring(line.indexOf(":") + 1).trim();
                        }
                        if (line.contains("Amount")) {
                            amount = line.substring(line.indexOf(":") + 1).trim();
                        }
                        if (line.contains("Type")) {
                            type = line.substring(line.indexOf(":") + 1).trim();
                        }
                    }
                    // Insert the transaction into the database
                    if (date != null && amount != null && type != null) {
                        try (Connection connection = DriverManager.getConnection(DB_URL, DB_USER, DB_PASSWORD);
                             PreparedStatement statement = connection.prepareStatement(INSERT_SQL)) {
                            statement.setString(1, date);
                            statement.setString(2, amount);
                            statement.setString(3, type);
                            statement.executeUpdate();
                        } catch (SQLException e) {
                            e.printStackTrace();
                        }
                    }
                }
            };
            String text = stripper.getText(document);
            // Print the extracted text for debugging
            System.out.println(text);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

这段代码会读取指定的 PDF 文件，使用 PDFTextStripper 来解析文本内容，并根据账单格式提取出日期、金额和类型等信息。然后，将提取出来的信息插入到 MySQL 数据库中的 transactions 表中。

需要注意的是，此代码仅作为示例，实际应用中需要根据具体的账单格式进行相应的调整和优化。