Java 将文件打包为zip压缩包下载

1、添加依赖

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<dependency>        <groupId>org.apache.ant</groupId>        <artifactId>ant</artifactId>        <version>1.10.5</version>    </dependency>

　　

2、编写工具类

　　

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package com.crtw.util;     import org.apache.tools.zip.ZipEntry; import org.apache.tools.zip.ZipOutputStream;   import java.io.*;   /**  * 生成压缩文件 （zip，rar 格式）  */ public class CompressUtil {       /**      * @param sourcePath   要压缩的文件路径      * @param suffix 生成的格式后最（zip、rar）      */     public static void generateFile(String sourcePath, String suffix) throws Exception {           File file = new File(sourcePath);         // 压缩文件的路径不存在         if (!file.exists()) {             throw new Exception("路径 " + sourcePath + " 不存在文件，无法进行压缩...");         }         // 用于存放压缩文件的文件夹         String generateFile = file.getParent() + File.separator +"CompressFile";         File compress = new File(generateFile);         // 如果文件夹不存在，进行创建         if( !compress.exists() ){             compress.mkdirs();         }         // 目的压缩文件         String generateFileName = compress.getAbsolutePath() + File.separator + "AAA" + file.getName() + "." + suffix;           // 输入流 表示从一个源读取数据         // 输出流 表示向一个目标写入数据           // 输出流         FileOutputStream outputStream = new FileOutputStream(generateFileName);           // 压缩输出流         ZipOutputStream zipOutputStream = new ZipOutputStream(new BufferedOutputStream(outputStream));           generateFile(zipOutputStream,file,"");           System.out.println("源文件位置：" + file.getAbsolutePath() + "，目的压缩文件生成位置：" + generateFileName);         // 关闭 输出流         zipOutputStream.close();     }       /**      * @param out  输出流      * @param file 目标文件      * @param dir  文件夹      * @throws Exception      */     private static void generateFile(ZipOutputStream out, File file, String dir) throws Exception {           // 当前的是文件夹，则进行一步处理         if (file.isDirectory()) {             //得到文件列表信息             File[] files = file.listFiles();               //将文件夹添加到下一级打包目录             out.putNextEntry(new ZipEntry(dir + "/"));               dir = dir.length() == 0 ? "" : dir + "/";               //循环将文件夹中的文件打包             for (int i = 0; i < files.length; i++) {                 generateFile(out, files[i], dir + files[i].getName());             }           } else { // 当前是文件               // 输入流             FileInputStream inputStream = new FileInputStream(file);             // 标记要打包的条目             out.putNextEntry(new ZipEntry(dir));             // 进行写操作             int len = 0;             byte[] bytes = new byte[1024];             while ((len = inputStream.read(bytes)) > 0) {                 out.write(bytes, 0, len);             }             // 关闭输入流             inputStream.close();         }       }       /**      * 递归压缩文件      * @param output ZipOutputStream 对象流      * @param file 压缩的目标文件流      * @param childPath 条目目录      */     private static void zip(ZipOutputStream output,File file,String childPath){         FileInputStream input = null;         try {             // 文件为目录             if (file.isDirectory()) {                 // 得到当前目录里面的文件列表                 File list[] = file.listFiles();                 childPath = childPath + (childPath.length() == 0 ? "" : "/")                         + file.getName();                 // 循环递归压缩每个文件                 for (File f : list) {                     zip(output, f, childPath);                 }             } else {                 // 压缩文件                 childPath = (childPath.length() == 0 ? "" : childPath + "/")                         + file.getName();                 output.putNextEntry(new ZipEntry(childPath));                 input = new FileInputStream(file);                 int readLen = 0;                 byte[] buffer = new byte[1024 * 8];                 while ((readLen = input.read(buffer, 0, 1024 * 8)) != -1) {                     output.write(buffer, 0, readLen);                 }             }         } catch (Exception ex) {             ex.printStackTrace();         } finally {             // 关闭流             if (input != null) {                 try {                     input.close();                 } catch (IOException ex) {                     ex.printStackTrace();                 }             }         }       }       /**      * 压缩文件（文件夹）      * @param path 目标文件流      * @param format zip 格式 | rar 格式      * @throws Exception      */     public static String zipFile(File path,String format) throws Exception {         String generatePath = "";         if( path.isDirectory() ){             generatePath = path.getParent().endsWith("/") == false ? path.getParent() + File.separator + path.getName() + "." + format: path.getParent() + path.getName() + "." + format;         }else {             generatePath = path.getParent().endsWith("/") == false ? path.getParent() + File.separator : path.getParent();             generatePath += path.getName().substring(0,path.getName().lastIndexOf(".")) + "." + format;         }         // 输出流         FileOutputStream outputStream = new FileOutputStream( generatePath );         // 压缩输出流         ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(outputStream));         zip(out, path,"");         out.flush();         out.close();           return generatePath;     }     //测试     public static void main(String[] args) {         String path = "F:\\Develop\\项目\\crawler";         String format = "zip";         try {             System.out.println(zipFile(new File(path),format));         } catch (Exception e) {             e.printStackTrace();             System.out.println(e.getMessage());         }       }   }

　　3、响应为下载

　　

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//压缩         String zipFile = CompressUtil.zipFile(new File(rootPath), "zip");          response.setContentType("APPLICATION/OCTET-STREAM");              response.setHeader("Content-Disposition","attachment; filename=company.zip");             try {             //ZipOutputStream out = new ZipOutputStream(response.getOutputStream());                 OutputStream out = response.getOutputStream();                 File ftp = ResourceUtils.getFile(zipFile);                 InputStream in = new FileInputStream(ftp);                               // 循环取出流中的数据                 byte[] b = new byte[100];                 int len;                 while ((len = in.read(b)) !=-1) {                       out.write(b, 0, len);                     }                   in.close();                   out.close();             } catch (Exception e) {                 e.printStackTrace();             }