java壓縮zip方法

import java.io.*;
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;

        /**
         * 壓縮成ZIP 方法1
         * @param srcDir 壓縮文件夾路徑
         * @param out    壓縮文件輸出流
         * @param KeepDirStructure  是否保留原來的目錄結構,true:保留目錄結構;
         *                          false:所有文件跑到壓縮包根目錄下(注意：不保留目錄結構可能會出現同名文件,會壓縮失敗)
         * @throws RuntimeException 壓縮失敗會拋出運行時異常
         */

    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();
        } catch (Exception e) {
            throw new RuntimeException("zip error from ZipUtils", e);
        } finally {
            if (zos != null) {
                try {
                    zos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

        /**
         * 壓縮成ZIP 方法2
         * @param srcFiles 需要壓縮的文件列表
         * @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 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("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 (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }


        /**
         * 遞歸壓縮方法
         * @param sourceFile 源文件
         * @param zos        zip輸出流
         * @param name       壓縮后的名稱
         * @param KeepDirStructure  是否保留原來的目錄結構,true:保留目錄結構;
         *                          false:所有文件跑到壓縮包根目錄下(注意：不保留目錄結構可能會出現同名文件,會壓縮失敗)
         * @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輸出流中添加一個zip實體，構造器中name為zip實體的文件的名字
            zos.putNextEntry(new ZipEntry(name));
            // copy文件到zip輸出流中
            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) {
                // 需要保留原來的文件結構時,需要對空文件夾進行處理
                if (KeepDirStructure) {
                    // 空文件夾的處理
                    zos.putNextEntry(new ZipEntry(name + "/"));
                    // 沒有文件，不需要文件的copy
                    zos.closeEntry();

                }

            } else {
                for (File file : listFiles) {
                    // 判斷是否需要保留原來的文件結構
                    if (KeepDirStructure) {
                        // 注意：file.getName()前面需要帶上父文件夾的名字加一斜杠,
                        // 不然最后壓縮包中就不能保留原來的文件結構,即：所有文件都跑到壓縮包根目錄下了
                        compress(file, zos, name + "/" + file.getName(), KeepDirStructure);
                    } else {
                        compress(file, zos, file.getName(), KeepDirStructure);
                    }

                }
            }
        }
    }

    public static void main(String[] args) throws Exception {
        /** 測試壓縮方法1  */
        FileOutputStream fos1 = new FileOutputStream(new File("c:/mytest01.zip"));
        ZipUtils.toZip("D:/log", fos1, true);

        /** 測試壓縮方法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);
    }

// 通過url壓縮

public File zipAttachFile(String filePathDir, List<String> urlFileList, String memberId) throws Exception {
    File zipFileDir = new File(filePathDir);
    if (!zipFileDir.exists()) {
        zipFileDir.mkdir();
    }
    List<File> fileList = new ArrayList<>();
    for (String fileUrl : urlFileList) {
        if (StringUtil.isBlank(fileUrl)) {
            continue;
        }
        int lastIndexOf = fileUrl.lastIndexOf("/");
        String fileName = fileUrl.substring(lastIndexOf + 1);
        File file = new File(filePathDir + fileName);
        URL url = new URL(fileUrl);
        FileUtils.copyURLToFile(url, file);
        fileList.add(file);
    }
    String filePath = filePathDir + transToTrilateralMemberId(memberId) + ".zip";
    File zipFile = new File(filePath);
    byte[] buf = new byte[1024];
    try {
        // ZipOutputStream類：完成文件或文件夾的壓縮
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFile));
        for (File file : fileList) {
            FileInputStream in = new FileInputStream(file);
            out.putNextEntry(new ZipEntry(file.getName()));
            int len;
            while ((len = in.read(buf)) > 0) {
                out.write(buf, 0, len);
            }
            out.closeEntry();
            in.close();
        }
        out.close();
    } catch (Exception e) {
        log.error("文件壓縮失敗" + e);
    }
    return zipFile;
}

// 刪除文件和目錄

public void deleteFileAndDir(String filePathDir) {
    Path path = Paths.get(filePathDir);
    try {
        Files.walkFileTree(path,
                new SimpleFileVisitor<Path>() {
                    // 先去遍歷刪除文件
                    @Override
                    public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                        Files.delete(file);
                        return FileVisitResult.CONTINUE;
                    }
                    // 再去遍歷刪除目錄
                    @Override
                    public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
                        Files.delete(dir);
                        return FileVisitResult.CONTINUE;
                    }
                }
        );
    } catch (Exception e) {
        log.error("刪除文件和文件夾失敗，路徑={}", filePathDir);
    }
}

}