config.properties
#second

#Tue Feb 13 09:49:22 CST 2018

url=bbbb

pw=qqqqq

driver=odbc

id=fgy

============================

package java_20180213_api_misc;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.util.Properties;

public class PropertiesDemo {

    public static void main(String[] args) throws Exception {

        Properties p1=new Properties();

        //这个文件放在项目的根目录下，或者写明路径，才能找到

        p1.load(new FileInputStream("WebContent\\config.properties"));

        p1.forEach((n,v)->System.out.println(n+"="+v));

//        System.out.println(p1.getProperty("id"));

        p1.setProperty("pw", "qqqqq");

        p1.store(new FileOutputStream("WebContent\\config.properties"), "second");

//        Properties sp=System.getProperties();

//        sp.forEach((n,v)->System.out.println(n+"="+v));

    }

}

package java_20180213_api_misc;

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.Enumeration;

import java.util.zip.Deflater;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import java.util.zip.ZipInputStream;

import java.util.zip.ZipOutputStream;

public class ZipDemo {

    public static void main(String[] args) throws Exception {

//        createZip();

//        unzip();

//        list();

        list2();

    }

//    private static void createZip() throws Exception{

//        try(ZipOutputStream zps=new ZipOutputStream(new FileOutputStream("WebContent\\txt\\aa.zip"))){

//            zps.setLevel(Deflater.BEST_COMPRESSION);

//            ZipEntry ze1=new ZipEntry("f2.txt");

//            zps.putNextEntry(ze1);

//            BufferedInputStream bis=new BufferedInputStream(new FileInputStream("WebContent\\txt\\f2.txt"));

//            byte[] buffer=new byte[1024];

//            int len=-1;

//            while ((len=bis.read(buffer, 0, buffer.length))!=-1) {

//                zps.write(buffer, 0, len);

//            }

//            bis.close();

//

//            ZipEntry ze2=new ZipEntry("f4.txt");

//            zps.putNextEntry(ze2);

//            BufferedInputStream bis1=new BufferedInputStream(new FileInputStream("WebContent\\txt\\f3.txt"));

//            byte[] buffer1=new byte[1024];

//            int len1=-1;

//            while ((len1=bis1.read(buffer1, 0, buffer1.length))!=-1) {

//                zps.write(buffer1, 0, len1);

//            }

//            bis1.close();

//        }

//    }

//    private static void unzip() throws Exception{

//        try(ZipInputStream zis=new ZipInputStream(new FileInputStream("WebContent\\txt\\aa.zip"))){

//            ZipEntry entry=null;

//            while ((entry=zis.getNextEntry())!=null) {

//                String name=entry.getName();

//                String dir="txt"+File.separator+name;

//                File file=new File(dir);

//                if (!file.getParentFile().exists()) {

//                    file.getParentFile().mkdirs();

//                }

//                file.createNewFile();

//                BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(file));

//                byte[] buffer=new byte[1024];

//                int len=-1;

//                while ((len=zis.read(buffer, 0, buffer.length))!=-1) {

//                    bos.write(buffer, 0, len);;

//                }

//                bos.close();

//            }

//        }

//    }

//    private static void list() throws Exception{

//        ZipFile zf=new ZipFile("WebContent\\txt\\aa.zip");

//        Enumeration<? extends ZipEntry> e=zf.entries();

//        while (e.hasMoreElements()) {

//            ZipEntry ze=e.nextElement();

//            System.out.println(ze.getName());

//        }

//    }

    private static void list2() throws Exception{

        ZipFile zf=new ZipFile("WebContent\\txt\\aa.zip");

        zf.stream().forEach(entry->System.out.println(entry.getName()));

    }

}