把指定文件,压缩到指定文件中

调用方式

ZipCompressor zc = new ZipCompressor("压缩后zip包文件名.zip");   
zc.compress(放入你要传入的文件名称(List<String>));  

压缩函数类:

package com.hdrs.aml.platform;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.List;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class ZipCompressor {
    static final int BUFFER = 8192;

    private File zipFile;

    public ZipCompressor(String pathName) {
        zipFile = new File(pathName);
    }

    public void compress(List<String> pathNames) {
        if (pathNames != null && pathNames.size() > 0) {

            ZipOutputStream out = null;
            try {
                FileOutputStream fileOutputStream = new FileOutputStream(zipFile);
                CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream, new CRC32());
                out = new ZipOutputStream(cos);
                String basedir = "";
                for (int i = 0; i < pathNames.size(); i++) {
                    String pathName = pathNames.get(i);
                    compress(new File(pathName), out, basedir);
                }
                out.close();
            } catch (Exception e) {
                throw new RuntimeException(e);
            }

        }
    }

    public void compress(String srcPathName) {
        File file = new File(srcPathName);
        if (!file.exists())
            throw new RuntimeException(srcPathName + "不存在!");
        try {
            FileOutputStream fileOutputStream = new FileOutputStream(zipFile);
            CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream, new CRC32());
            ZipOutputStream out = new ZipOutputStream(cos);
            String basedir = "";
            compress(file, out, basedir);
            out.close();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    private void compress(File file, ZipOutputStream out, String basedir) {
        /* 判断是目录还是文件 */
        if (file.isDirectory()) {
            System.out.println("压缩:" + basedir + file.getName());
            this.compressDirectory(file, out, basedir);
        } else {
            System.out.println("压缩:" + basedir + file.getName());
            this.compressFile(file, out, basedir);
        }
    }

    /** 压缩一个目录 */
    private void compressDirectory(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() + "/");
        }
    }

    /** 压缩一个文件 */
    private void compressFile(File file, ZipOutputStream out, String basedir) {
        if (!file.exists()) {
            return;
        }
        try {
            BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
            ZipEntry entry = new ZipEntry(basedir + file.getName());
            out.putNextEntry(entry);
            int count;
            byte data[] = new byte[BUFFER];
            while ((count = bis.read(data, 0, BUFFER)) != -1) {
                out.write(data, 0, count);
            }
            bis.close();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}

 

posted @ 2017-11-02 13:31  情似雨餘黏地絮  阅读(511)  评论(0编辑  收藏  举报