ZipUtils.java

package message.utils;

import org.apache.commons.io.IOUtils;
import org.apache.tools.zip.ZipOutputStream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.*;
import java.util.Enumeration;

/**
 * 解压缩zip包.
 * 
 * @author sunhao(sunhao.java@gmail.com)
 * @version V1.0
 * @createTime 2012-5-3 上午11:51:41
 */
public class ZipUtils {
	private static final Logger logger = LoggerFactory.getLogger(ZipUtils.class);

    /**
     * 私有化构造器
     */
    private ZipUtils(){}

	/**
	 * 解压zip文件
	 * 
     * @param zipFilePath 需要解压的文件,绝对路径
     * @param zipPath     解压存储路径，相对路径
     * @return
     * @throws Exception
     */
	public static boolean unZip(String zipFilePath, String zipPath) throws Exception {
		if(StringUtils.isEmpty(zipFilePath) || StringUtils.isEmpty(zipPath)){
			logger.error("this two params is requried!");
			return false;
		}
		
		//目标目录是否存在，存在不做任何动作，不存在则新建
		File destFile = new File(zipPath);
		if(!destFile.exists()) {
			FileUtils.createFolder(destFile);
		}
		
		File srcZipFile = new File(zipFilePath);			//源zip文件
		if(!srcZipFile.getName().endsWith(".zip")){
			logger.warn("this is not a zip file named '{}'", zipFilePath);
			return false;
		}
		
		//zip文件
		java.util.zip.ZipFile zipFile = new java.util.zip.ZipFile(srcZipFile);
		//zip文件包含的文件实体
		java.util.zip.ZipEntry entry = null;
		Enumeration<?> e = zipFile.entries();
		//遍历每一个zip包含的文件
		while(e.hasMoreElements()){
			entry = (java.util.zip.ZipEntry) e.nextElement();
			if(entry.isDirectory()){
				//是文件夹
				File file = new File(zipPath + entry.getName());
				file.mkdir();
			} else {
				//是文件
				InputStream is = zipFile.getInputStream(entry);		//得到当前文件的文件流
				File eFile = new File(zipPath + entry.getName());
				FileOutputStream fos = new FileOutputStream(eFile);		//输出流
				int b;
				while((b = is.read()) != -1){			//未读到最后
					fos.write(b);						//将读取到的写入到文件中
				}
				is.close();
				fos.close();
			}
		}
		zipFile.close();

		return true;
	}
	
	/**
	 * 压缩
	 * 
     * @param zipFileName 打包后文件的名称,绝对路径
     * @param filePath    需要打包的文件夹或者文件的路径,绝对路径
     * @param pathName    打包到pathName文件夹下,文件夹名称
     * @throws Exception
     */
    public static void zip(String zipFileName, String filePath, String pathName) throws Exception {
    	if(StringUtils.isEmpty(zipFileName) || StringUtils.isEmpty(filePath)){
			logger.error("this two params is requried!");
			return;
		}
    	
    	OutputStream out = null;
        BufferedOutputStream bos = null;
        ZipOutputStream zos = null;

        File f = new File(zipFileName);
        out = new FileOutputStream(f);
        bos = new BufferedOutputStream(out);
        zos = new ZipOutputStream(bos);
        zos.setEncoding("UTF-8");

        if (StringUtils.isNotBlank(pathName)) {
            pathName = pathName + File.separator;
        } else {
            pathName = f.getName().substring(0, f.getName().length() - 4);
        }

        doZip(zos, filePath, pathName);

        zos.flush();
        zos.close();
        bos.flush();
        bos.close();
        out.flush();
        out.close();
    }
    
    private static void doZip(ZipOutputStream zos, String filePath, String pathName) throws IOException {
    	File file2zip = new File(filePath);
        if (file2zip.isFile()) {
            zos.putNextEntry(new org.apache.tools.zip.ZipEntry(pathName + file2zip.getName()));
            IOUtils.copy(new FileInputStream(file2zip.getAbsolutePath()), zos);
            zos.closeEntry();
        } else {
            File[] files = file2zip.listFiles();
            if (files != null) {
                for (File f : files) {
                    if (f.isDirectory()) {
                        doZip(zos, f.getAbsolutePath(), pathName + f.getName() + File.separator);
                    } else {
                        zos.putNextEntry(new org.apache.tools.zip.ZipEntry(pathName + File.separator + f.getName()));
                        IOUtils.copy(new FileInputStream(f.getAbsolutePath()), zos);
                        zos.closeEntry();
                    }
                }
            }
        }
    }
}