java使用poi对excel文件的加密解密_encryptioninfo-CSDN博客
1、首先pom文件引入poi包，如下：
<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.example</groupId> <artifactId>poi</artifactId> <version>1.0-SNAPSHOT</version><dependencies> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>4.1.0</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>4.1.0</version> </dependency></dependencies> </project>2、具体加解密代码如下
import java.io.*;import java.security.GeneralSecurityException; import org.apache.poi.hssf.record.crypto.Biff8EncryptionKey;import org.apache.poi.hssf.usermodel.HSSFCell;import org.apache.poi.hssf.usermodel.HSSFRow;import org.apache.poi.hssf.usermodel.HSSFSheet;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.openxml4j.exceptions.InvalidFormatException;import org.apache.poi.openxml4j.opc.OPCPackage;import org.apache.poi.openxml4j.opc.PackageAccess;import org.apache.poi.poifs.crypt.*;import org.apache.poi.poifs.filesystem.POIFSFileSystem;import org.apache.poi.ss.usermodel.Row;import org.apache.poi.ss.usermodel.Sheet;import org.apache.poi.ss.usermodel.Workbook;import org.apache.poi.util.LittleEndianInput;import org.apache.poi.xssf.usermodel.XSSFWorkbook; public class ExcelUtil { public static void main(String[] args) throws Exception { encryptExcl("G:\\学生.xls", "123456");//加密// encryptExcl("G:\\学生2.xlsx", "test");//加密// decryptExcel_xlsx("G:\\学生2.xlsx", "test");//解密xlsx// decryptExcel_xls("G:\\学生.xls", "123456");//解密xls } /** *解密xls * @param FILE 文件名 * @param password 密码 */ public static void decryptExcel_xls(String FILE, String password){ try{ POIFSFileSystem pfs = new POIFSFileSystem(new FileInputStream(FILE)); //解密，这个密码不是指保护工作表和工作博密码，而是打开文件密码 Biff8EncryptionKey.setCurrentUserPassword(password); HSSFWorkbook wb = new HSSFWorkbook(pfs); //读取测试 HSSFSheet sheet = wb.getSheetAt(0); HSSFRow row = sheet.getRow(0); HSSFCell cell = row.getCell(0); System.out.println(cell.getStringCellValue()); wb.close(); }catch(Exception e){ e.printStackTrace(); }finally { } } /** * 解密xlsx * @param FILE 文件名 * @param password 密码 * @throws Exception */ public static void decryptExcel_xlsx(String FILE, String password) throws Exception{ Workbook wb = null; FileInputStream in = null; try { in = new FileInputStream(FILE); POIFSFileSystem poifsFileSystem = new POIFSFileSystem(in); EncryptionInfo encInfo = new EncryptionInfo(poifsFileSystem); Decryptor decryptor = Decryptor.getInstance(encInfo); decryptor.verifyPassword(password); wb = new XSSFWorkbook(decryptor.getDataStream(poifsFileSystem)); } catch (Exception e) { e.printStackTrace(); }finally { in.close(); } System.out.println("================================="); System.out.println("Number of Sheets:" + wb.getNumberOfSheets()); System.out.println("Sheet1's name:" + wb.getSheetName(0)); System.out.println(); } /** * 加密Excl * @param FILE * @param password * @throws IOException * @throws InvalidFormatException * @throws GeneralSecurityException */ public static void encryptExcl(String FILE, String password) throws IOException, InvalidFormatException, GeneralSecurityException { if (FILE.toLowerCase().endsWith("xlsx")) { System.out.println("=====加密 xlsx===="+FILE); // 设置密 码 保 护 · POIFSFileSystem fs = new POIFSFileSystem(); EncryptionInfo info = new EncryptionInfo(EncryptionMode.standard); Encryptor enc = info.getEncryptor(); //设置密码 enc.confirmPassword(password); //加密文件 OPCPackage opc = OPCPackage.open(new File(FILE), PackageAccess.READ_WRITE); OutputStream os = enc.getDataStream(fs); opc.save(os); opc.close(); // 这一步特别注意，导出之前一定要先关闭加密文件流，不然导出文件会损坏而无法打开 os.close(); //把加密后的文件写回到流 FileOutputStream fos = new FileOutputStream(FILE); fs.writeFilesystem(fos); fos.close(); } else { System.out.println("=====加密 xls===="+FILE); POIFSFileSystem poif = new POIFSFileSystem(new FileInputStream(FILE)); HSSFWorkbook wb = new HSSFWorkbook(poif); // 设置密 码 保 护 · Biff8EncryptionKey.setCurrentUserPassword(password); wb.writeProtectWorkbook(Biff8EncryptionKey.getCurrentUserPassword(), "管理员"); wb.unwriteProtectWorkbook(); // 写入excel文件 FileOutputStream fileOut = new FileOutputStream(FILE); wb.write(fileOut); fileOut.close(); } System.out.println("over"); } }原网址: 访问
创建于: 2024-04-17 09:49:18
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