java导出excel java操作文件、文件夹 java制作zip,
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java导出excel java操作文件、文件夹 java制作zip,
- /**
- * 导出老师信息
- */
- public static boolean exportTeach(String filePath, String teachName,
- String grade, String classes, String subject) {
- // 第一步,创建一个webbook,对应一个Excel文件
- HSSFWorkbook wb = new HSSFWorkbook();
- // 第二步,在webbook中添加一个sheet,对应Excel文件中的sheet
- HSSFSheet sheet = wb.createSheet("老师信息");
- // 第三步,在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short
- HSSFRow row = sheet.createRow((int) 0);
- HSSFCell cell = row.createCell(0);
- for (int s = 0; s < 4; s++) {
- cell = row.createCell(s);
- if (s == 0) {
- cell.setCellValue("老师名字");
- } else if (s == 1) {
- cell.setCellValue("年级");
- } else if (s == 2) {
- cell.setCellValue("班级");
- } else if (s == 3) {
- cell.setCellValue("科目");
- }
- }
- // 第五步,写入实体数据 实际应用中这些数据从数据库得到,
- row = sheet.createRow(1);
- for (int j = 0; j < 4; j++) {
- cell = row.createCell(j);
- if (j == 0) {
- cell.setCellValue(teachName);
- } else if (j == 1) {
- cell.setCellValue(grade);
- } else if (j == 2) {
- cell.setCellValue(classes);
- } else if (j == 3) {
- cell.setCellValue(subject);
- }
- }
- // 第六步,将文件存到指定位置
- try {
- if (createDir(filePath + "/teach")) {
- FileOutputStream fout = new FileOutputStream(filePath
- + "/teach/teach.xls");
- wb.write(fout);
- fout.close();
- return true;
- } else {
- return false;
- }
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * @see 导出备课题目信息
- * @param filePath 文件路径
- * @param problemList 备课题目信息
- */
- public static boolean exportTopic(String filePath, List<Problem> problemList) {
- // 第一步,创建一个webbook,对应一个Excel文件
- HSSFWorkbook wb = new HSSFWorkbook();
- // 第二步,在webbook中添加一个sheet,对应Excel文件中的sheet
- HSSFSheet sheet = wb.createSheet("备课题目信息");
- // 第三步,在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short
- HSSFRow row = sheet.createRow((int) 0);
- HSSFCell cell = row.createCell(0);
- for (int s = 0; s < 6; s++) {
- cell = row.createCell(s);
- if (s == 0) {
- cell.setCellValue("题目内容");
- } else if (s == 1) {
- cell.setCellValue("答案");
- } else if (s == 2) {
- cell.setCellValue("所属科目");
- } else if (s == 3) {
- cell.setCellValue("知识点");
- } else if (s == 4) {
- cell.setCellValue("所属章");
- } else if (s == 5) {
- cell.setCellValue("所属节");
- }
- }
- // 第五步,写入实体数据 实际应用中这些数据从数据库得到,
- if (problemList != null & problemList.size() > 0) {
- int s = 0;
- for (int i = 0; i < problemList.size(); i++) {
- Problem problem = (Problem) problemList.get(i);
- row = sheet.createRow(++s);
- for (int j = 0; j <= 5; j++) {
- cell = row.createCell(j);
- if (j == 0) {
- cell.setCellValue(problem.getContent());
- } else if (j == 1) {
- cell.setCellValue(problem.getAnswer());
- } else if (j == 2) {
- cell.setCellValue(problem.getSubjects().getName());
- } else if (j == 3) {
- cell.setCellValue(problem.getKnowledgePoints()
- .getKnowledgeContent());
- } else if (j == 4) {
- cell.setCellValue(problem.getKnowledgePoints()
- .getRemark2());
- } else if (j == 5) {
- cell.setCellValue(problem.getKnowledgePoints()
- .getRemark3());
- }
- }
- }
- }
- // 第六步,将文件存到指定位置
- try {
- if (createDir(filePath + "/problem")) {
- FileOutputStream fout = new FileOutputStream(filePath
- + "/problem/problem.xls");
- wb.write(fout);
- fout.close();
- return true;
- } else {
- return false;
- }
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * @see 创建文件夹
- */
- public static boolean createDir(String destDirName) {
- File dir = new File(destDirName);
- if (dir.exists()) {
- System.out.println("创建目录" + destDirName + "失败,已经存在!!");
- }
- if (!destDirName.endsWith(File.separator)) {
- destDirName = destDirName + File.separator;
- }
- // 创建单个目录
- if (dir.mkdirs()) {
- System.out.println("创建成功");
- return true;
- } else {
- System.out.println("创建失败!!");
- return false;
- }
- }
- /**
- * 删除某个文件夹下的所有文件夹和文件
- *
- * @param delpath
- * String
- * @throws FileNotFoundException
- * @throws IOException
- * @return boolean
- */
- public static boolean deletefile(String delpath) throws Exception {
- try {
- File file = new File(delpath);
- // 当且仅当此抽象路径名表示的文件存在且 是一个目录时,返回 true
- if (!file.isDirectory()) {
- file.delete();
- } else if (file.isDirectory()) {
- String[] filelist = file.list();
- for (int i = 0; i < filelist.length; i++) {
- File delfile = new File(delpath + "\\" + filelist[i]);
- if (!delfile.isDirectory()) {
- delfile.delete();
- System.out
- .println(delfile.getAbsolutePath() + "删除文件成功");
- } else if (delfile.isDirectory()) {
- deletefile(delpath + "\\" + filelist[i]);
- }
- }
- System.out.println(file.getAbsolutePath() + "删除成功");
- file.delete();
- }
- } catch (FileNotFoundException e) {
- System.out.println("deletefile() Exception:" + e.getMessage());
- }
- return true;
- }
- /**
- * 创建ZIP文件
- *
- * @param sourcePath
- * 文件或文件夹路径
- * @param zipPath
- * 生成的zip文件存在路径(包括文件名)
- */
- public static void createZip(String sourcePath, String zipPath) {
- FileOutputStream fos = null;
- ZipOutputStream zos = null;
- try {
- fos = new FileOutputStream(zipPath);
- zos = new ZipOutputStream(fos);
- writeZip(new File(sourcePath), "", zos);
- } catch (FileNotFoundException e) {
- System.out.println(("创建ZIP文件失败"));
- } finally {
- try {
- if (zos != null) {
- zos.close();
- }
- } catch (IOException e) {
- System.out.println(("创建ZIP文件失败"));
- }
- }
- }
- /**
- * 创建zip压缩包
- *
- * @param file
- * @param parentPath
- * @param zos
- */
- private static void writeZip(File file, String parentPath,
- ZipOutputStream zos) {
- zos.setEncoding("gbk");
- if (file.exists()) {
- if (file.isDirectory()) {// 处理文件夹
- parentPath += file.getName() + File.separator;
- File[] files = file.listFiles();
- for (File f : files) {
- zos.setEncoding("gbk");
- writeZip(f, parentPath, zos);
- }
- } else {
- FileInputStream fis = null;
- DataInputStream dis = null;
- try {
- fis = new FileInputStream(file);
- dis = new DataInputStream(new BufferedInputStream(fis));
- ZipEntry ze = new ZipEntry(parentPath + file.getName());
- zos.putNextEntry(ze);
- zos.setEncoding("gbk");
- byte[] content = new byte[1024];
- int len;
- while ((len = fis.read(content)) != -1) {
- zos.write(content, 0, len);
- zos.flush();
- }
- } catch (FileNotFoundException e) {
- System.out.println(("创建ZIP文件失败"));
- } catch (IOException e) {
- System.out.println(("创建ZIP文件失败"));
- } finally {
- try {
- if (dis != null) {
- dis.close();
- }
- } catch (IOException e) {
- System.out.println(("创建ZIP文件失败"));
- }
- }
- }
- }
- }
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