java 如何将多个文件打包成一个zip ?我可以得到需要下载的文件路径String[] path//这个已知就是如何将这
java 如何将多个文件打包成一个zip ?
我可以得到需要下载的文件路径
String[] path;//这个已知
就是如何将这些文件打包成一个zip供下载?
希望高手们写下详细代码.``
[解决办法]
用zipentry zipoutputstream把文件打包，根据自己的应用修改一下代码代码
- Java code
import java.util.List;import java.util.zip.*;import java.io.*;public class ZipCommand { private static int ziplevel = 7; private File sourceFile = null; private File zipFile = null; private ZipOutputStream jos = null; private ZipEntry sourEntry = null; private String zipfileName = null; private String sourceFileName = null; private static byte[] buf = new byte[1024]; public static void main(String[] s){ ZipCommand tz = new ZipCommand(); //System.out.println( tz.AddtoZip("E:/cis-2000/document/CPoPUserSManual_CPoP_User_s_Manual.doc")); } public String AddtoZip(List sourcefilelist){ if(sourcefilelist == null || sourcefilelist.size()<1){ return null; } sourceFile = new File(sourcefilelist.get(0).toString()); if(!sourceFile.isFile()){ return null; }else{ sourceFileName = sourceFile.getName(); this.setZipfileName(sourceFileName.substring(0,sourceFileName.lastIndexOf("."))+".zip"); try{ zipFile = new File(sourceFile.getParent(),this.getZipfileName()); if(zipFile.exists()){ int i = 1 ; while(true){ zipFile = new File(sourceFile.getParent(),this.getZipfileName().substring(0, getZipfileName().lastIndexOf(".zip")) + i + ".zip"); if(!zipFile.exists()) break ; i++ ; } } //System.out.println(zipFile.getPath()); if(zipFile.exists()){ zipFile.deleteOnExit(); } zipFile.createNewFile(); jos = new ZipOutputStream(new FileOutputStream(zipFile)); jos.setLevel(ziplevel); for(int i=0;i<sourcefilelist.size();i++){ Stzip(jos,new File(sourcefilelist.get(i).toString())); } jos.finish(); }catch(Exception e){ return null; } if(zipFile !=null) return zipFile.getPath(); else{ return null; } } } private void Stzip(ZipOutputStream jos, File file) throws IOException, FileNotFoundException { sourEntry= new ZipEntry(file.getName()); FileInputStream fin = new FileInputStream(file); BufferedInputStream in = new BufferedInputStream(fin); jos.putNextEntry(sourEntry); int len; while ((len = in.read(buf)) >= 0) jos.write(buf, 0, len); in.close(); jos.closeEntry(); } public File getSourceFile() { return sourceFile; } public void setSourceFile(File sourceFile) { this.sourceFile = sourceFile; } public String getZipfileName() { return zipfileName; } public void setZipfileName(String zipfileName) { this.zipfileName = zipfileName; } }
[解决办法]
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;
public class DirectoryZip {
public static void jar(String inputFileName, String outputFileName) throws Exception {
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outputFileName));
out.setEncoding("GBK"); // ###### 这句话是关键，指定输出的编码方式
File f = new File(inputFileName);
jar(out, f, "");
out.close();
}
private static void jar(ZipOutputStream out, File f, String base) throws Exception {
if (f.isDirectory()) {
File[] fl = f.listFiles();
base = base.length() == 0 ? "" : base + "/";
out.putNextEntry(new ZipEntry(base));
for (int i = 0; i < fl.length; i++) {
jar(out, fl[i], base + fl[i].getName());
}
} else {
out.putNextEntry(new ZipEntry(base));
FileInputStream in = new FileInputStream(f);
byte[] buffer = new byte[1024];
int n = in.read(buffer);
while (n != -1) {
out.write(buffer, 0, n);
n = in.read(buffer);
}
in.close();
}
}
public static void main(String[] args) {
try {
jar("D:\\temp\\1", "d://mytest.zip");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
[解决办法]
代码运行需要 ant.jar
- Java code
import java.io.*;import java.util.Enumeration;import org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipFile;import org.apache.tools.zip.ZipOutputStream;public class ZipUtil { /** * 压缩。 * * @param src * 源文件或者目录 * @param dest * 压缩文件路径 * @throws IOException */ public static void zip(String src, String dest) throws IOException { ZipOutputStream out = null; try { File outFile = new File(dest); out = new ZipOutputStream(outFile); File fileOrDirectory = new File(src); if (fileOrDirectory.isFile()) { zipFileOrDirectory(out, fileOrDirectory, ""); } else { File[] entries = fileOrDirectory.listFiles(); for (int i = 0; i < entries.length; i++) { // 递归压缩，更新curPaths zipFileOrDirectory(out, entries[i], ""); } } } catch (IOException ex) { ex.printStackTrace(); } finally { if (out != null) { try { out.close(); } catch (IOException ex) { } } } } /** * 递归压缩文件或目录 * * @param out * 压缩输出流对象 * @param fileOrDirectory * 要压缩的文件或目录对象 * @param curPath * 当前压缩条目的路径，用于指定条目名称的前缀 * @throws IOException */ private static void zipFileOrDirectory(ZipOutputStream out, File fileOrDirectory, String curPath) throws IOException { FileInputStream in = null; try { if (!fileOrDirectory.isDirectory()) { // 压缩文件 byte[] buffer = new byte[4096]; int bytes_read; in = new FileInputStream(fileOrDirectory); ZipEntry entry = new ZipEntry(curPath + fileOrDirectory.getName()); out.putNextEntry(entry); while ((bytes_read = in.read(buffer)) != -1) { out.write(buffer, 0, bytes_read); } out.closeEntry(); } else { // 压缩目录 File[] entries = fileOrDirectory.listFiles(); for (int i = 0; i < entries.length; i++) { // 递归压缩，更新curPaths zipFileOrDirectory(out, entries[i], curPath + fileOrDirectory.getName() + "/"); } } } catch (IOException ex) { ex.printStackTrace(); throw ex; } finally { if (in != null) { try { in.close(); } catch (IOException ex) { } } } } /** * 解压缩。 * * @param zipFileName * 源文件 * @param outputDirectory * 解压缩后文件存放的目录 * @throws IOException */ public static void unzip(String zipFileName, String outputDirectory) throws IOException { ZipFile zipFile = null; try { zipFile = new ZipFile(zipFileName); Enumeration e = zipFile.getEntries(); ZipEntry zipEntry = null; File dest = new File(outputDirectory); dest.mkdirs(); while (e.hasMoreElements()) { zipEntry = (ZipEntry) e.nextElement(); String entryName = zipEntry.getName(); InputStream in = null; FileOutputStream out = null; try { if (zipEntry.isDirectory()) { String name = zipEntry.getName(); name = name.substring(0, name.length() - 1); File f = new File(outputDirectory + File.separator + name); f.mkdirs(); } else { int index = entryName.lastIndexOf("\\"); if (index != -1) { File df = new File(outputDirectory + File.separator + entryName.substring(0, index)); df.mkdirs(); } index = entryName.lastIndexOf("/"); if (index != -1) { File df = new File(outputDirectory + File.separator + entryName.substring(0, index)); df.mkdirs(); } File f = new File(outputDirectory + File.separator + zipEntry.getName()); // f.createNewFile(); in = zipFile.getInputStream(zipEntry); out = new FileOutputStream(f); int c; byte[] by = new byte[1024]; while ((c = in.read(by)) != -1) { out.write(by, 0, c); } out.flush(); } } catch (IOException ex) { ex.printStackTrace(); throw new IOException("解压失败：" + ex.toString()); } finally { if (in != null) { try { in.close(); } catch (IOException ex) { } } if (out != null) { try { out.close(); } catch (IOException ex) { } } } } } catch (IOException ex) { ex.printStackTrace(); throw new IOException("解压失败：" + ex.toString()); } finally { if (zipFile != null) { try { zipFile.close(); } catch (IOException ex) { } } } } public static void main(String[] args) { try { ZipUtil.zip("C:\\0115080120081024","d:\\0115080120081027.zip"); //ZipUtil.unzip("D:\\a\\010108012008-8-25.zip", "d:\\a\\tmp"); } catch (Exception e) { e.printStackTrace(); } }}
[解决办法]
不管如何做,如果用JDK 的zip压缩,中文问题早晚会碰到,如果碰到了,到apache上面下在他的zip包用就可以了,这个不是单独的一个zip,是和别的打包在一起的,哪一个忘了
找到以后删除多余的,最终也就70kb左右,支持zip,tar,gzip