python challenge challenge6之java解

yorknong

challeng5 是使用Python的pickle模块，对对象进行持久化管理。java和python的对象持久化算法不同，没法代替。
python解法在http://lampeter123.iteye.com/blog/398535
里面介绍的比较详细，偶就不说了
但是这个java解法是不能得得到答案的
java zip解压时没法把每个文件里面的comments读取出来，都是null
而python可以读出来


import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.methods.GetMethod;
public class Challenge6Zip {
private final static int BUFFER = 1024;
private final static String destPath = "D:\\temp";
public static void main(String[] args) {
//downloadZipfile();
extractZipFile();
//readFile();
//readZipComments();
}
private static void readZipComments() {

}
private static void readFile() {
String number = "90052";
for(int i=0; i<910;i++){
try {
FileInputStream fis = new FileInputStream(new File(destPath+"\\"+number + ".txt"));
String line;
BufferedReader reader = new BufferedReader(new InputStreamReader(fis));
line = reader.readLine();
StringBuilder builder = new StringBuilder();
while(line!=null){
builder.append(line);
line = reader.readLine();
}
String fileStr = builder.toString();
if(fileStr.indexOf("Next nothing")!=-1){
String[] strArr = builder.toString().split(" ");
number = strArr[strArr.length-1];
System.out.println("number =" + number);
}else{
System.out.println(fileStr);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

}
// java解包，没发现comments
private static void extractZipFile() {
try {
FileInputStream fis = new FileInputStream(new File("D:\\temp\\channel.zip"));
ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
ZipEntry entry;
while((entry = zis.getNextEntry())!= null){
System.out.println("entry name = " + entry.getName());
System.out.println("entry comments = " + entry.getComment());
File zipFile = new File(destPath + "\\"+ entry.getName());
if(entry.isDirectory()){
if(!zipFile.exists())
zipFile.mkdirs();
}else{
FileOutputStream entryFos = new FileOutputStream(zipFile);
int len;
byte[] b = new byte[BUFFER];
while((len = zis.read(b))!=-1){
entryFos.write(b, 0, len);
}
System.out.println("not Dir entry comments = " + entry.getComment());
zis.closeEntry();
entryFos.close();
}
}
fis.close();
zis.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private static void downloadZipfile() {
HttpClient client = new HttpClient();
GetMethod get = new GetMethod(
"http://www.pythonchallenge.com/pc/def/channel.zip");
try {
client.executeMethod(get);
InputStream in = get.getResponseBodyAsStream();
FileOutputStream out = new FileOutputStream(new File("D:\\temp\\channel.zip"));
byte[] b = new byte[BUFFER];
int len = 0;
while((len=in.read(b))!=-1){
out.write(b, 0, len);
}
in.close();
out.close();
} catch (HttpException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally{
get.releaseConnection();
}
System.out.println("success!");
}
}