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Java xlstransformer如何轉(zhuǎn)換

小樊
82
2024-10-25 00:15:53
欄目: 編程語言

XLSTransformer 是 Apache POI 庫中的一個類,用于將 XML 文檔轉(zhuǎn)換為 Excel 工作表。以下是一個簡單的示例,演示如何使用 XLSTransformer 將 XML 數(shù)據(jù)轉(zhuǎn)換為 Excel 文件:

  1. 首先,確保已將 Apache POI 庫添加到項目中。如果使用 Maven,可以在 pom.xml 文件中添加以下依賴:
<dependencies>
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi</artifactId>
        <version>5.1.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi-ooxml</artifactId>
        <version>5.1.0</version>
    </dependency>
</dependencies>
  1. 創(chuàng)建一個簡單的 XML 文件,例如 data.xml
<?xml version="1.0" encoding="UTF-8"?>
<data>
    <row>
        <cell>Name</cell>
        <cell>Age</cell>
    </row>
    <row>
        <cell>John Doe</cell>
        <cell>30</cell>
    </row>
    <row>
        <cell>Jane Smith</cell>
        <cell>28</cell>
    </row>
</data>
  1. 使用以下 Java 代碼將 XML 數(shù)據(jù)轉(zhuǎn)換為 Excel 文件:
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class XLSTransformerExample {
    public static void main(String[] args) throws IOException {
        FileInputStream xmlFile = new FileInputStream("data.xml");
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
        Document doc = dBuilder.parse(xmlFile);
        doc.getDocumentElement().normalize();

        NodeList rowList = doc.getElementsByTagName("row");

        Workbook workbook = new XSSFWorkbook();
        Sheet sheet = workbook.createSheet("XML to Excel");

        for (int i = 0; i < rowList.getLength(); i++) {
            Node rowNode = rowList.item(i);
            Row row = sheet.createRow(i);

            NodeList cellList = rowNode.getChildNodes();
            for (int j = 0; j < cellList.getLength(); j++) {
                Node cellNode = cellList.item(j);
                Cell cell = row.createCell(j);

                if (cellNode.getNodeType() == Node.ELEMENT_NODE) {
                    String cellValue = cellNode.getTextContent();
                    cell.setCellValue(cellValue);
                }
            }
        }

        FileOutputStream fileOut = new FileOutputStream("output.xlsx");
        workbook.write(fileOut);
        fileOut.close();
        workbook.close();
        xmlFile.close();

        System.out.println("Excel file with XML data has been generated!");
    }
}

運行此代碼后,將在當(dāng)前目錄下生成一個名為 output.xlsx 的 Excel 文件,其中包含從 XML 文件中提取的數(shù)據(jù)。注意,這個示例僅適用于簡單的 XML 數(shù)據(jù),對于更復(fù)雜的數(shù)據(jù)結(jié)構(gòu),您可能需要對代碼進行相應(yīng)的調(diào)整。

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