Eclipse Tomcat Dynamic Web Project

package com.xu.utils; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.List; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; import jakarta.servlet.ServletOutputStream; import jakarta.servlet.http.HttpServletResponse; @SuppressWarnings(value = "all") public class FileUtils { /** * 1 多文件下载 * * @param response HttpServletResponse * @param files[] 待下载文件 * @param downloadfile 下载文件文件名+文件类型(a.zip) * @throws Exception * @date 2019年3月29日11:31:35 */ public void multFileDownload(HttpServletResponse response, String[] files, String downloadfile) throws Exception { response.setContentType("multipart/form-data");//1.设置文件ContentType类型，这样设置，会自动判断下载文件类型 response.setHeader("Content-Disposition", "attachment;fileName=" + downloadfile); ServletOutputStream out; FileInputStream instream = null; try { ZipOutputStream zipstream = new ZipOutputStream(response.getOutputStream()); for (String file : files) { if (!new File(file).exists()) { continue; } instream = new FileInputStream(file); ZipEntry entry = new ZipEntry(file); zipstream.putNextEntry(entry); byte[] buffer = new byte[1024]; int len = 0; while (len != -1) { len = instream.read(buffer); zipstream.write(buffer, 0, buffer.length); } instream.close(); zipstream.closeEntry(); zipstream.flush(); } zipstream.finish(); zipstream.close(); } catch (IOException e) { new RuntimeException(e.getMessage()); } } /** * 2 多文件下载 * * @param response HttpServletResponse * @param files[] 待下载文件 * @param downloadfile 下载文件 * @param path 待下载文件路径 * @param tempfile 待下载临时文件 * @throws Exception * @date 2019年3月29日11:31:35 */ public void multFileDownload(HttpServletResponse response, String[] files, String path, String downloadfile) throws Exception { response.setContentType("multipart/form-data");//1.设置文件ContentType类型，这样设置，会自动判断下载文件类型 response.setHeader("Content-Disposition", "attachment;fileName=" + downloadfile); ServletOutputStream out; FileInputStream instream = null; try { ZipOutputStream zipstream = new ZipOutputStream(response.getOutputStream()); for (String file : files) { if (!new File(path + file).exists()) { continue; } instream = new FileInputStream(path + file); ZipEntry entry = new ZipEntry(path + file); zipstream.putNextEntry(entry); byte[] buffer = new byte[1024]; int len = 0; while (len != -1) { len = instream.read(buffer); zipstream.write(buffer, 0, buffer.length); } instream.close(); zipstream.closeEntry(); zipstream.flush(); } zipstream.finish(); zipstream.close(); } catch (IOException e) { new RuntimeException(e.getMessage()); } } /** * 1 单文件下载 * * @param response HttpServletResponse * @param filepath 待下载文件路径 * @param downloadfile 下载文件 * @date 2019年3月29日11:31:35 */ public void singleFileDownload(HttpServletResponse response, String filepath, String downloadfile) { response.setContentType("multipart/form-data");//1.设置文件ContentType类型，这样设置，会自动判断下载文件类型 response.setHeader("Content-Disposition", "attachment;fileName=" + downloadfile); ServletOutputStream out; File file = new File(filepath); if (!file.exists()) { new RuntimeException("文件不存在"); } try { FileInputStream inputStream = new FileInputStream(file); out = response.getOutputStream(); byte[] buffer = new byte[1024]; int len = 0; while ((len = inputStream.read(buffer)) != -1) { out.write(buffer, 0, len); } inputStream.close(); out.flush(); out.close(); } catch (IOException e) { new RuntimeException(e.getMessage()); } } /** * 2 单文件下载 * * @param response HttpServletResponse * @param filepath 待下载文件路径 * @param filename 下载文件名称 * @param filetype 下载文件类型 * @date 2019年3月29日11:31:35 */ public void singleFileDownload(HttpServletResponse response, String filepath, String filename, String filetype) { response.setContentType("multipart/form-data");//1.设置文件ContentType类型，这样设置，会自动判断下载文件类型 response.setHeader("Content-Disposition", "attachment;fileName=" + filename + filetype); ServletOutputStream out; File file = new File(filepath); if (!file.exists()) { new RuntimeException("文件不存在"); } try { FileInputStream inputStream = new FileInputStream(file); out = response.getOutputStream(); byte[] buffer = new byte[1024]; int len = 0; while ((len = inputStream.read(buffer)) != -1) { out.write(buffer, 0, len); } inputStream.close(); out.flush(); out.close(); } catch (IOException e) { new RuntimeException(e.getMessage()); } } /** * 1 多文件 压缩成 ZIP * * @param files 文件名字 * @param path 文件路径 * @param loaclfilepath 临时文件全路径 * @date 2019年3月29日11:31:35 */ public void toZip(String[] files, String path, String loaclfilepath) throws Exception { FileInputStream instream = null; ZipOutputStream zipstream = new ZipOutputStream(new FileOutputStream(new File(loaclfilepath))); for (String file : files) { if (!new File(path + file).exists()) { continue; } instream = new FileInputStream(path + file); ZipEntry entry = new ZipEntry(path + file); zipstream.putNextEntry(entry); byte[] buffer = new byte[1024]; int len = 0; while ((len = instream.read(buffer)) != -1) { zipstream.write(buffer, 0, buffer.length); } zipstream.closeEntry(); zipstream.flush(); } zipstream.finish(); zipstream.close(); } /** * 2 多文件 压缩成 ZIP * * @param files 文件名字 * @param path 文件路径 * @param loaclfilepath 压缩文件全路径 * @date 2019年3月29日11:31:35 */ public void toZip(List<String> files, String path, String loaclfilepath) throws Exception { FileInputStream instream = null; ZipOutputStream zipstream = new ZipOutputStream(new FileOutputStream(new File(loaclfilepath))); for (String f