Java实现zip文件压缩:单个文件、文件夹以及文件和文件夹的压缩

// 测试
ZipUtil.zipFiles(new File("D:/abc"), new File("a123.zip"));

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
public class ZipUtil {
    /**
     * 压缩文件
     *
     * @param srcfile
     */
    public static void zipFiles(File srcfile, File targetFile) {
        ZipOutputStream out = null;
        try {
            out = new ZipOutputStream(new FileOutputStream(targetFile));
            if (srcfile.isFile()) {
                zipFile(srcfile, out, "");
            } else {
                File[] list = srcfile.listFiles();
                for (int i = 0; i < list.length; i++) {
                    compress(list[i], out, "");
                }
            }
            System.out.println("压缩完毕");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (out != null)
                    out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    /**
     * 压缩文件夹里的文件
     * 起初不知道是文件还是文件夹--- 统一调用该方法
     *
     * @param file
     * @param out
     * @param basedir
     */
    private static void compress(File file, ZipOutputStream out, String basedir) {
        /* 判断是目录还是文件 */
        if (file.isDirectory()) {
            zipDirectory(file, out, basedir);
        } else {
            zipFile(file, out, basedir);
        }
    }
    /**
     * 压缩单个文件
     *
     * @param srcfile
     */
    public static void zipFile(File srcfile, ZipOutputStream out, String basedir) {
        if (!srcfile.exists())
            return;
        byte[] buf = new byte[1024];
        FileInputStream in = null;
        try {
            int len;
            in = new FileInputStream(srcfile);
            out.putNextEntry(new ZipEntry(basedir + srcfile.getName()));
            while ((len = in.read(buf)) > 0) {
                out.write(buf, 0, len);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (out != null)
                    out.closeEntry();
                if (in != null)
                    in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    /**
     * 压缩文件夹
     *
     * @param dir
     * @param out
     * @param basedir
     */
    public static void zipDirectory(File dir, ZipOutputStream out, String basedir) {
        if (!dir.exists())
            return;
        File[] files = dir.listFiles();
        for (int i = 0; i < files.length; i++) {
            /* 递归 */
            compress(files[i], out, basedir + dir.getName() + "/");
        }
    }
}