java 读excel xlsx

Posted 2020-07-21 donaldlee

http://bbs.csdn.net/topics/380257685

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Element;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// 解压Book1.xlsx
		ZipFile xlsxFile;
		try {
			xlsxFile = new ZipFile(new File("c:\\1.xlsx"));
			DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

			// 先读取sharedStrings.xml这个文件备用
			ZipEntry sharedStringXML = xlsxFile.getEntry("xl/sharedStrings.xml");
			InputStream sharedStringXMLIS = xlsxFile
					.getInputStream(sharedStringXML);
			Document sharedString;
			sharedString = dbf.newDocumentBuilder().parse(sharedStringXMLIS);
			NodeList str = sharedString.getElementsByTagName("t");
			String sharedStrings[] = new String[str.getLength()];
			for (int n = 0; n < str.getLength(); n++) {
				Element element = (Element) str.item(n);
				sharedStrings[n] = element.getTextContent();
			}
			// 找到解压文件夹里的workbook.xml,此文件中包含了这张工作表中有几个sheet
			ZipEntry workbookXML = xlsxFile.getEntry("xl/workbook.xml");
			InputStream workbookXMLIS = xlsxFile.getInputStream(workbookXML);
			Document doc = dbf.newDocumentBuilder().parse(workbookXMLIS);
			// 获取一共有几个sheet
			NodeList nl = doc.getElementsByTagName("sheet");

			for (int i = 0; i < nl.getLength(); i++) {
				Element element = (Element) nl.item(i);// 将node转化为element，用来得到每个节点的属性
				System.out.println(element.getAttribute("name"));// 输出sheet节点的name属性的值
				// 接着就要到解压文件夹里找到对应的name值的xml文件，比如在workbook.xml中有<sheet name="Sheet1"
				// sheetId="1" r:id="rId1" /> 节点
				// 那么就可以在解压文件夹里的xl/worksheets下找到sheet1.xml,这个xml文件夹里就是包含的表格的内容
				ZipEntry sheetXML = xlsxFile.getEntry("xl/worksheets/"
						+ element.getAttribute("name").toLowerCase() + ".xml");
				InputStream sheetXMLIS = xlsxFile.getInputStream(sheetXML);
				Document sheetdoc = dbf.newDocumentBuilder().parse(sheetXMLIS);
				NodeList rowdata = sheetdoc.getElementsByTagName("row");
				for (int j = 0; j < rowdata.getLength(); j++) {
					// 得到每个行
					// 行的格式：
					/*
					 * <row r="1" spans="1:3">r表示第一行,spans表示有几列 <c r="A1"
					 * t="s">//r表示该列的列表
					 * ，t="s"个人认为是表示这个单元格的内容可以在sharedStrings.xml这个文件里找到，对应的节点
					 * 下标就是v节点的值，即0，若没有t属性，则v的值就是该单元格的内容 <v>0</v> </c> <c r="B1"
					 * t="s"> <v>1</v> </c> <c r="C1" t="s"> <v>2</v> </c> </row>
					 */
					Element row = (Element) rowdata.item(j);
					// 根据行得到每个行中的列
					NodeList columndata = row.getElementsByTagName("c");
					for (int k = 0; k < columndata.getLength(); k++) {
						Element column = (Element) columndata.item(k);
						NodeList values = column.getElementsByTagName("v");
						Element value = (Element) values.item(0);
						if (column.getAttribute("t") != null
								& column.getAttribute("t").equals("s")) {
							// 如果是共享字符串则在sharedstring.xml里查找该列的值

							System.out.print(sharedStrings[Integer.parseInt(value.getTextContent())] + " ");
						} else {
							if (value != null) {
								System.out.print(value.getTextContent() + " ");
							}else {
								System.out.println("j : " + j + "   k : " + k + "  null");
							}
						}
					}
					System.out.println();
				}
			}
		} catch (ZipException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SAXException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}

}