发布于 2016-07-11 09:27:59 | 147 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Java设计模式，程序狗速度看过来！

Java程序设计语言

java 是一种可以撰写跨平台应用软件的面向对象的程序设计语言，是由Sun Microsystems公司于1995年5月推出的Java程序设计语言和Java平台（即JavaEE(j2ee), JavaME(j2me), JavaSE(j2se)）的总称。

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使用java基础类写的一个简单的zip压缩解压工具类，实现了指定目录压缩到和该目录同名的zip文件和将zip文件解压到指定的目录的功能

使用java基础类写的一个简单的zip压缩解压工具类

package sun.net.helper;

import java.io.*;
import java.util.logging.Logger;
import java.util.zip.*;

public class ZipUtil {
    private final static Logger logger = Logger.getLogger(ZipUtil.class.getName());
    private static final int BUFFER = 1024*10;

    /**
     * 将指定目录压缩到和该目录同名的zip文件，自定义压缩路径
     * @param sourceFilePath  目标文件路径
     * @param zipFilePath     指定zip文件路径
     * @return
     */
    public static boolean zip(String sourceFilePath,String zipFilePath){
        boolean result=false;
        File source=new File(sourceFilePath);
        if(!source.exists()){
            logger.info(sourceFilePath+" doesn't exist.");
            return result;
        }
        if(!source.isDirectory()){
            logger.info(sourceFilePath+" is not a directory.");
            return result;
        }
        File zipFile=new File(zipFilePath+"/"+source.getName()+".zip");
        if(zipFile.exists()){
            logger.info(zipFile.getName()+" is already exist.");
            return result;
        }else{
            if(!zipFile.getParentFile().exists()){
                if(!zipFile.getParentFile().mkdirs()){
                    logger.info("cann't create file "+zipFile.getName());
                    return result;
                }
            }
        }
        logger.info("creating zip file...");
        FileOutputStream dest=null;
        ZipOutputStream out =null;
        try {
            dest = new FileOutputStream(zipFile);
            CheckedOutputStream checksum = new CheckedOutputStream(dest, new Adler32());
            out=new ZipOutputStream(new BufferedOutputStream(checksum));
            out.setMethod(ZipOutputStream.DEFLATED);
            compress(source,out,source.getName());
            result=true;
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }finally {
            if (out != null) {
                try {
                    out.closeEntry();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                try {
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        if(result){
            logger.info("done.");
        }else{
            logger.info("fail.");
        }
        return result;
    }
    private static void compress(File file,ZipOutputStream out,String mainFileName) {
        if(file.isFile()){
            FileInputStream fi= null;
            BufferedInputStream origin=null;
            try {
                fi = new FileInputStream(file);
                origin=new BufferedInputStream(fi, BUFFER);
                int index=file.getAbsolutePath().indexOf(mainFileName);
                String entryName=file.getAbsolutePath().substring(index);
                System.out.println(entryName);
                ZipEntry entry = new ZipEntry(entryName);
                out.putNextEntry(entry);
                byte[] data = new byte[BUFFER];
                int count;
                while((count = origin.read(data, 0, BUFFER)) != -1) {
                    out.write(data, 0, count);
                }
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                if (origin != null) {
                    try {
                        origin.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        }else if (file.isDirectory()){
            File[] fs=file.listFiles();
            if(fs!=null&&fs.length>0){
                for(File f:fs){
                    compress(f,out,mainFileName);
                }
            }
        }
    }

    /**
     * 将zip文件解压到指定的目录，该zip文件必须是使用该类的zip方法压缩的文件
     * @param zipFile
     * @param destPath
     * @return
     */
    public static boolean unzip(File zipFile,String destPath){
        boolean result=false;
        if(!zipFile.exists()){
            logger.info(zipFile.getName()+" doesn't exist.");
            return result;
        }
        File target=new File(destPath);
        if(!target.exists()){
            if(!target.mkdirs()){
                logger.info("cann't create file "+target.getName());
                return result;
            }
        }
        String mainFileName=zipFile.getName().replace(".zip","");
        File targetFile=new File(destPath+"/"+mainFileName);
        if(targetFile.exists()){
            logger.info(targetFile.getName()+" already exist.");
            return result;
        }
        ZipInputStream zis =null;
        logger.info("start unzip file ...");
        try {
            FileInputStream fis= new FileInputStream(zipFile);
            CheckedInputStream checksum = new CheckedInputStream(fis, new Adler32());
            zis = new ZipInputStream(new BufferedInputStream(checksum));
            ZipEntry entry;
            while((entry = zis.getNextEntry()) != null) {
                int count;
                byte data[] = new byte[BUFFER];
                String entryName=entry.getName();
                int index=entryName.indexOf(mainFileName);
                String newEntryName=destPath+"/"+entryName.substring(index);
                System.out.println(newEntryName);
                File temp=new File(newEntryName).getParentFile();
                if(!temp.exists()){
                    if(!temp.mkdirs()){
                        throw new RuntimeException("create file "+temp.getName() +" fail");
                    }
                }
                FileOutputStream fos = new FileOutputStream(newEntryName);
                BufferedOutputStream dest = new BufferedOutputStream(fos,BUFFER);
                while ((count = zis.read(data, 0, BUFFER)) != -1) {
                    dest.write(data, 0, count);
                }
                dest.flush();
                dest.close();
            }
            result=true;
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if (zis != null) {
                try {
                    zis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        if(result){
            logger.info("done.");
        }else{
            logger.info("fail.");
        }
        return result;
    }
    public static void main(String[] args) throws IOException {
        //ZipUtil.zip("D:/apache-tomcat-7.0.30", "d:/temp");
        File zipFile=new File("D:/temp/apache-tomcat-7.0.30.zip");
        ZipUtil.unzip(zipFile,"d:/temp") ;
    }
}

package com.lanp;