New file |
| | |
| | | package com.whyc.dto; |
| | | import java.io.File; |
| | | import java.io.FileInputStream; |
| | | import java.io.FileOutputStream; |
| | | import java.io.IOException; |
| | | import java.io.OutputStream; |
| | | import java.util.ArrayList; |
| | | import java.util.List; |
| | | import java.util.zip.ZipEntry; |
| | | import java.util.zip.ZipOutputStream; |
| | | |
| | | |
| | | public class ZipUtils { |
| | | |
| | | private static final int BUFFER_SIZE = 2 * 1024; |
| | | |
| | | /** |
| | | * 压缩成ZIP 方法1 |
| | | * @param srcDir 压缩文件夹路径 |
| | | * @param out 压缩文件输出流 |
| | | * @param KeepDirStructure 是否保留原来的目录结构,true:保留目录结构; |
| | | * false:所有文件跑到压缩包根目录下(注意:不保留目录结构可能会出现同名文件,会压缩失败) |
| | | * @throws RuntimeException 压缩失败会抛出运行时异常 |
| | | */ |
| | | public static void toZip(String srcDir, OutputStream out, boolean KeepDirStructure) |
| | | throws RuntimeException{ |
| | | |
| | | //long start = System.currentTimeMillis(); |
| | | ZipOutputStream zos = null ; |
| | | try { |
| | | zos = new ZipOutputStream(out); |
| | | File sourceFile = new File(srcDir); |
| | | compress(sourceFile,zos,sourceFile.getName(),KeepDirStructure); |
| | | //long end = System.currentTimeMillis(); |
| | | //System.out.println("压缩完成,耗时:" + (end - start) +" ms"); |
| | | } catch (Exception e) { |
| | | throw new RuntimeException("zip error from ZipUtils",e); |
| | | }finally{ |
| | | if(zos != null){ |
| | | try { |
| | | zos.close(); |
| | | } catch (IOException e) { |
| | | e.printStackTrace(); |
| | | } |
| | | } |
| | | } |
| | | |
| | | } |
| | | |
| | | /** |
| | | * 压缩成ZIP 方法2 |
| | | * @param srcFiles 需要压缩的文件列表 |
| | | * @param out 压缩文件输出流 |
| | | * @throws RuntimeException 压缩失败会抛出运行时异常 |
| | | */ |
| | | public static void toZip(List<File> srcFiles , OutputStream out)throws RuntimeException { |
| | | long start = System.currentTimeMillis(); |
| | | ZipOutputStream zos = null ; |
| | | try { |
| | | zos = new ZipOutputStream(out); |
| | | for (File srcFile : srcFiles) { |
| | | byte[] buf = new byte[BUFFER_SIZE]; |
| | | zos.putNextEntry(new ZipEntry(srcFile.getName())); |
| | | int len; |
| | | FileInputStream in = new FileInputStream(srcFile); |
| | | while ((len = in.read(buf)) != -1){ |
| | | zos.write(buf, 0, len); |
| | | } |
| | | zos.closeEntry(); |
| | | in.close(); |
| | | } |
| | | long end = System.currentTimeMillis(); |
| | | System.out.println("压缩完成,耗时:" + (end - start) +" ms"); |
| | | } catch (Exception e) { |
| | | throw new RuntimeException("zip error from ZipUtils",e); |
| | | }finally{ |
| | | if(zos != null){ |
| | | try { |
| | | zos.close(); |
| | | } catch (IOException e) { |
| | | e.printStackTrace(); |
| | | } |
| | | } |
| | | } |
| | | } |
| | | |
| | | |
| | | /** |
| | | * 递归压缩方法 |
| | | * @param sourceFile 源文件 |
| | | * @param zos zip输出流 |
| | | * @param name 压缩后的名称 |
| | | * @param KeepDirStructure 是否保留原来的目录结构,true:保留目录结构; |
| | | * false:所有文件跑到压缩包根目录下(注意:不保留目录结构可能会出现同名文件,会压缩失败) |
| | | * @throws Exception |
| | | */ |
| | | private static void compress(File sourceFile, ZipOutputStream zos, String name, |
| | | boolean KeepDirStructure) throws Exception{ |
| | | byte[] buf = new byte[BUFFER_SIZE]; |
| | | if(sourceFile.isFile()){ |
| | | // 向zip输出流中添加一个zip实体,构造器中name为zip实体的文件的名字 |
| | | zos.putNextEntry(new ZipEntry(name)); |
| | | // copy文件到zip输出流中 |
| | | int len; |
| | | FileInputStream in = new FileInputStream(sourceFile); |
| | | while ((len = in.read(buf)) != -1){ |
| | | zos.write(buf, 0, len); |
| | | } |
| | | // Complete the entry |
| | | zos.closeEntry(); |
| | | in.close(); |
| | | } else { |
| | | File[] listFiles = sourceFile.listFiles(); |
| | | if(listFiles == null || listFiles.length == 0){ |
| | | // 需要保留原来的文件结构时,需要对空文件夹进行处理 |
| | | if(KeepDirStructure){ |
| | | // 空文件夹的处理 |
| | | zos.putNextEntry(new ZipEntry(name + "/")); |
| | | // 没有文件,不需要文件的copy |
| | | zos.closeEntry(); |
| | | } |
| | | |
| | | }else { |
| | | for (File file : listFiles) { |
| | | // 判断是否需要保留原来的文件结构 |
| | | if (KeepDirStructure) { |
| | | // 注意:file.getName()前面需要带上父文件夹的名字加一斜杠, |
| | | // 不然最后压缩包中就不能保留原来的文件结构,即:所有文件都跑到压缩包根目录下了 |
| | | compress(file, zos, name + "/" + file.getName(),KeepDirStructure); |
| | | } else { |
| | | compress(file, zos, file.getName(),KeepDirStructure); |
| | | } |
| | | |
| | | } |
| | | } |
| | | } |
| | | } |
| | | |
| | | public static void main(String[] args) throws Exception { |
| | | /** 测试压缩方法1 */ |
| | | FileOutputStream fos1 = new FileOutputStream(new File("D:\\IDEAWorkSpace\\CadDrawManager\\target\\face.zip")); |
| | | ZipUtils.toZip("D:\\IDEAWorkSpace\\CadDrawManager\\target\\face", fos1,true); |
| | | |
| | | /** 测试压缩方法2 */ |
| | | /*List<File> fileList = new ArrayList<>(); |
| | | fileList.add(new File("D:/Java/jdk1.7.0_45_64bit/bin/jar.exe")); |
| | | fileList.add(new File("D:/Java/jdk1.7.0_45_64bit/bin/java.exe")); |
| | | FileOutputStream fos2 = new FileOutputStream(new File("c:/mytest02.zip")); |
| | | ZipUtils.toZip(fileList, fos2);*/ |
| | | } |
| | | } |