rar格式的壓縮包收費,java支持zip格式的壓縮和解壓java
import java.io.*; 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 ZipUtils { private static final int BUFFER_SIZE = 2 * 1024; /** * zip解壓 * @param srcFile zip源文件 * @param destDirPath 解壓後的目標文件夾 * @throws RuntimeException 解壓失敗會拋出運行時異常 */ public static void unZip(File srcFile, String destDirPath) throws RuntimeException { long start = System.currentTimeMillis(); // 判斷源文件是否存在 if (!srcFile.exists()) { throw new RuntimeException(srcFile.getPath() + "所指文件不存在"); } // 開始解壓 ZipFile zipFile = null; try { zipFile = new ZipFile(srcFile); Enumeration<?> entries = zipFile.entries(); while (entries.hasMoreElements()) { ZipEntry entry = (ZipEntry) entries.nextElement(); System.out.println("解壓" + entry.getName()); // 若是是文件夾,就建立個文件夾 if (entry.isDirectory()) { String dirPath = destDirPath + "/" + entry.getName(); File dir = new File(dirPath); dir.mkdirs(); } else { // 若是是文件,就先建立一個文件,而後用io流把內容copy過去 File targetFile = new File(destDirPath + "/" + entry.getName()); // 保證這個文件的父文件夾必需要存在 if(!targetFile.getParentFile().exists()){ targetFile.getParentFile().mkdirs(); } targetFile.createNewFile(); // 將壓縮文件內容寫入到這個文件中 InputStream is = zipFile.getInputStream(entry); FileOutputStream fos = new FileOutputStream(targetFile); int len; byte[] buf = new byte[BUFFER_SIZE]; while ((len = is.read(buf)) != -1) { fos.write(buf, 0, len); } // 關流順序,先打開的後關閉 fos.close(); is.close(); } } long end = System.currentTimeMillis(); System.out.println("解壓完成,耗時:" + (end - start) +" ms"); } catch (Exception e) { throw new RuntimeException("unzip error from ZipUtils", e); } finally { if(zipFile != null){ try { zipFile.close(); } catch (IOException e) { e.printStackTrace(); } } } } /** * 壓縮成ZIP 方法 * @param srcFiles 須要壓縮的文件列表 * @param out 壓縮文件輸出流 * @throws RuntimeException 壓縮失敗會拋出運行時異常 */ public static void toZip(List<File> srcFiles , OutputStream out)throws Exception { 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("壓縮完成,耗時:" + (end - start) +" ms"); } catch (Exception e) { throw new RuntimeException("zip error from ZipUtils",e); }finally{ if(zos != null){ try { zos.close(); } catch (Exception e) { e.printStackTrace(); } } } } }
import com.szfore.utils.ZipUtils; import java.io.File; import java.io.FileOutputStream; import java.io.OutputStream; import java.util.ArrayList; import java.util.List; public class TestZip { public static void main(String[] args) throws Exception{ //testToZip(); testUnzip(); } /** * 測試壓縮文件 */ public static void testToZip() throws Exception { File file1 = new File("c:\\1.txt"); File file2 = new File("c:\\2.txt"); List<File> files = new ArrayList<File>(); files.add(file1); files.add(file2); OutputStream out = new FileOutputStream("c:\\1.zip"); ZipUtils.toZip(files,out); } /** * 測試解壓文件 * @throws Exception */ public static void testUnzip() throws Exception{ File srcFile = new File("c:\\2.zip"); String destDirPath = "c:\\"; ZipUtils.unZip(srcFile,destDirPath); } }