本文实例为大家分享了java实现多个文件压缩的具体代码，供大家参考，具体内容如下

需要用到的ant.jar

package util;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import java.util.ArrayList;import java.util.Enumeration;import java.util.List;import java.util.zip.ZipEntry;import java.util.zip.ZipFile;import java.util.zip.ZipOutputStream;public class ZipTools { public static final String ZIP_FILENAME = ""; //需要解压缩的文件名 public static final String ZIP_DIR = ""; //需要压缩的文件夹 public static final String UN_ZIP_DIR = ""; //要解压的文件目录 public static final int BUFFER = 1024 ; //缓存大小 public static void zipFile(String baseDir,String fileName) throws Exception{ List fileList=getSubFiles(new File(baseDir)); ZipOutputStream zos=new ZipOutputStream(new FileOutputStream(fileName)); ZipEntry ze=null; byte[] buf=new byte[BUFFER]; int readLen=0; for(int i = 0; i <fileList.size(); i++) { File f=(File)fileList.get(i); ze=new ZipEntry(getAbsFileName(baseDir, f)); ze.setSize(f.length()); ze.setTime(f.lastModified()); zos.putNextEntry(ze); InputStream is=new BufferedInputStream(new FileInputStream(f)); while ((readLen=is.read(buf, 0, BUFFER))!=-1) { zos.write(buf, 0, readLen); } is.close(); } zos.close(); } private static String getAbsFileName(String baseDir, File realFileName){ File real=realFileName; File base=new File(baseDir); String ret=real.getName(); while (true) { real=real.getParentFile(); if(real==null) break; if(real.equals(base)) break; else ret=real.getName()+"/"+ret; } return ret; } private static List getSubFiles(File baseDir){ List ret=new ArrayList(); File[] tmp=baseDir.listFiles(); for (int i = 0; i <tmp.length; i++) { if(tmp[i].isFile()) ret.add(tmp[i]); if(tmp[i].isDirectory()) ret.addAll(getSubFiles(tmp[i])); } return ret; } public static void upZipFile() throws Exception{ ZipFile zfile=new ZipFile(ZIP_FILENAME); Enumeration zList=zfile.entries(); ZipEntry ze=null; byte[] buf=new byte[1024]; while(zList.hasMoreElements()){ ze=(ZipEntry)zList.nextElement(); if(ze.isDirectory()){ File f=new File(ZIP_DIR+ze.getName()); f.mkdir(); continue; } OutputStream os=new BufferedOutputStream(new FileOutputStream(getRealFileName(ZIP_DIR, ze.getName()))); InputStream is=new BufferedInputStream(zfile.getInputStream(ze)); int readLen=0; while ((readLen=is.read(buf, 0, 1024))!=-1) { os.write(buf, 0, readLen); } is.close(); os.close(); } zfile.close(); } public static File getRealFileName(String baseDir, String absFileName){ String[] dirs=absFileName.split("/"); File ret=new File(baseDir); if(dirs.length>1){ for (int i = 0; i < dirs.length-1;i++) { ret=new File(ret, dirs[i]); } if(!ret.exists()) ret.mkdirs(); ret=new File(ret, dirs[dirs.length-1]); return ret; } return ret; } public static void deleteDirFile(String path){ File file=new File(path); if(file.isDirectory()){ //如果是目录，先递归删除 String[] list=file.list(); for(int i=0;i<list.length;i++){ deleteDirFile(path+"\\"+list[i]); //先删除目录下的文件 } } file.delete(); }public static String newFolder(String dir){ java.io.File myFilePath=new java.io.File(dir); if(myFilePath.isDirectory()){}else{ myFilePath.mkdirs(); } return dir; }public static String getFileNames(String path){ File file = new File(path); // get file list where the path has File[] array = file.listFiles(); // 获得文件列表 String pdfNames=""; for(int i=0;i<array.length;i++){ if(array[i].isFile()){ if(array[i].getName().endsWith(".pdf")){ //获得pdf文件名称 pdfNames+=array[i].getName().substring(0,array[i].getName().length()-4)+","; } } } if(pdfNames.length()>0){ pdfNames.substring(0,pdfNames.length()-1); } return pdfNames; }public static void copyFile(String oldPath, String newPath) { try { int bytesum = 0; int byteread = 0; File oldfile = new File(oldPath); if (oldfile.exists()) { //文件存在时 InputStream inStream = new FileInputStream(oldPath); //读入原文件 FileOutputStream fs = new FileOutputStream(newPath); byte[] buffer = new byte[1444]; while ( (byteread = inStream.read(buffer)) != -1) { bytesum += byteread; //字节数文件大小 fs.write(buffer, 0, byteread); } inStream.close(); } } catch (Exception e) { System.out.println("copy file error!"); e.printStackTrace(); } }public static boolean fileExist(String fileNames,String pdfName){ boolean flag=false; if(!"".equals(fileNames)){ String[] nameArr=fileNames.split(","); for(int i=0;i<nameArr.length;i++){ if(pdfName.equals(nameArr[i])){ //如果文件名相同则执行拷贝操作(拷贝到zip目录准备打包) flag=true; break; } } } return flag; }public static void deleteFileAndDir(String path){ File file = new File(path); File[] array = file.listFiles(); for(int i=0;i<array.length;i++){ if(array[i].isFile()){ array[i].delete(); }else if(array[i].isDirectory()){ deleteDirFile(array[i].getPath()); } } }}

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