java 读取xlsx

（1）导入maven

<!-- 读取excel文件 -->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>3.9</version>
</dependency>

（2）代码

public static void main(String[] args) {
    // 解压Book1.xlsx
    ZipFile xlsxFile;
    try {
        xlsxFile = new ZipFile(new File("/Users/chengtao/downloads/教练入职时间.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:);
                        }
                    }
                }
                nameAndEntryTimeMap.put(name_Key, time_value);
                System.out.println();
            }
            System.out.println(nameAndEntryTimeMap);
        }
    } 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();
    }

}