我正在制作一个客户端更新程序&在尝试解压缩文件时,我的cmd中出现错误。
它应该做的是:
错误:
Exists in Directory!
file unzip : C:\Users\Ryan T\Desktop\Rezzion Updater\.rezzion.cache\rezzion.cache
java.io.FileNotFoundException: .rezzion.cache\rezzion.cache\Data (The system cannot find the path specified)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.FileOutputStream.<init>(Unknown Source)
at rezzion.UnZip.unZipIt(UnZip.java:54)
at rezzion.Downloader.<init>(Downloader.java:68)
at rezzion.Downloader.main(Downloader.java:78)
file unzip : C:\Users\Ryan T\Desktop\Rezzion Updater\.rezzion.cache\rezzion.cache\Data
项目文件夹的图片:
我的Downloader.java(主类):
package rezzion;
import java.awt.FlowLayout;
public class Downloader extends JFrame {
private static final long serialVersionUID = 1L;
private static boolean exists = (new File(System.getProperty("user.home") + ".rezzion.cache")).exists();
private static boolean existsinDir = (new File("rezzion.cache.zip")).exists();
private static String site = "https://dl.dropboxusercontent.com/s/yoh4d17gfgnv2od/rezzion.cache.zip?dl=1&token_hash=AAE1qdxL_-2y_arb8MBnk8AHSsuhLH1-lwSiGVc0ayQKXA";
private static String filename = "rezzion.cache.zip";
private static final String INPUT_ZIP_FILE = "rezzion.cache.zip";
private static final String OUTPUT_FOLDER = ".rezzion.cache";
private final int BUFFER = 1024;
public Downloader() {
JFrame frm = new JFrame();
JProgressBar current = new JProgressBar(0, 100);
current.setBounds(35, 68, 326, 30);
current.setValue(0);
current.setStringPainted(true);
frm.setVisible(true);
frm.getContentPane().setLayout(null);
frm.setSize(400, 200);
frm.setDefaultCloseOperation(EXIT_ON_CLOSE);
if (!exists) {
if (!existsinDir) {
frm.getContentPane().add(current);
try {
URL url = new URL(site);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
int filesize = connection.getContentLength();
float totalDataRead = 0;
java.io.BufferedInputStream in = new java.io.BufferedInputStream(connection.getInputStream());
java.io.FileOutputStream fos = new java.io.FileOutputStream(filename);
java.io.BufferedOutputStream bout = new BufferedOutputStream(fos, BUFFER);
byte[] data = new byte[BUFFER];
int i = 0;
while ((i = in.read(data, 0, BUFFER)) >= 0) {
totalDataRead = totalDataRead + i;
bout.write(data, 0, i);
float Percent = (totalDataRead * 100) / filesize;
current.setValue((int) Percent);
if (current.getValue() == 99) {
current.setValue(100);
}
}
bout.close();
in.close();
} catch (Exception e) {
javax.swing.JOptionPane.showConfirmDialog((java.awt.Component) null, e.getMessage(), "Error", javax.swing.JOptionPane.DEFAULT_OPTION);
}
} else {
System.out.println("Exists in Directory!");
UnZip unZip = new UnZip();
unZip.unZipIt(INPUT_ZIP_FILE, OUTPUT_FOLDER);
//TODO: Exists in Directory
}
} else {
System.out.println("Exists in User.Home!");
//TODO: Exists in User.Home
}
}
public static final void main(String[] args) throws Exception {
new Downloader();
}
/**
*
*/
public static void unzipComplete() {
//TODO
System.out.println("unzip Complete!");
}
}
我的UnZip.java(自我解释):
package rezzion;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
public class UnZip {
List<String> fileList;
private static final String OUTPUT_FOLDER = ".rezzion.cache";
public void unZipIt(String zipFile, String outputFolder) {
byte[] buffer = new byte[1024];
try {
// create output directory is not exists
File folder = new File(System.getProperty("user.home")
+ OUTPUT_FOLDER);
if (!folder.exists()) {
folder.mkdir();
}
// get the zip file content
ZipInputStream zis = new ZipInputStream(
new FileInputStream(zipFile));
// get the zipped file list entry
ZipEntry ze = zis.getNextEntry();
while (ze != null) {
String fileName = ze.getName();
File newFile = new File(outputFolder + File.separator
+ fileName);
System.out.println("file unzip : " + newFile.getAbsoluteFile());
// create all non exists folders
// else you will hit FileNotFoundException for compressed folder
new File(newFile.getParent()).mkdirs();
FileOutputStream fos = new FileOutputStream(newFile);
int len;
while ((len = zis.read(buffer)) > 0) {
fos.write(buffer, 0, len);
}
fos.close();
ze = zis.getNextEntry();
}
zis.closeEntry();
zis.close();
System.out.println("Done");
Downloader.unzipComplete();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
很抱歉这篇文章格式不佳,但是如果有人可以提供帮助我已经阅读了这个错误了一点&amp;仔细看看它告诉我的是什么,尝试合并课程&amp;没运气。感谢那些愿意指出一些事情的人,即使它显而易见。我很想念它。
答案 0 :(得分:1)
由于这显然是一个桌面应用程序,答案对我来说似乎很明显。对于部署Java桌面应用程序,最好的选择通常是安装应用程序。使用Java Web Start。 JWS适用于Windows,OS X&amp; * nix中。
JWS提供了许多吸引人的功能,包括但不限于启动画面,桌面集成,文件关联,自动更新(包括延迟下载和程序化控制更新),本地分区和&amp;按平台,体系结构或语言环境下载的其他资源,运行时环境的配置(最低J2SE版本,运行时选项,RAM等),使用扩展轻松管理公共资源..
..有没有办法让我保持这个?
没有。
DownloadServiceListener
。