标签: ioexception

当我打开文件以解压缩其内容时，出现以下异常。当我在 Windows 资源管理器中选择文件或将鼠标悬停在显示工具提示的文件上时，就会发生这种情况。

System.IO.IOException was unhandled
  Message=The process cannot access the file 'D:\Documents\AutoUnZip\Zips\MVCContrib.Extras.release.zip' because it is being used by another process.
  Source=mscorlib
  StackTrace:
       at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
       at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
       at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
       at System.IO.File.OpenRead(String path)
       at AutoUnzip.SelectFolderForm.w_Changed(Object sender, FileSystemEventArgs e) in D:\Projects\WindowsForms\AutoUnzip\AutoUnzip\SelectFolderForm.cs:line 37
       at System.IO.FileSystemWatcher.OnCreated(FileSystemEventArgs e)
       at System.IO.FileSystemWatcher.NotifyFileSystemEventArgs(Int32 action, String name)
       at …

private void myFunction(String userName){
    String fileName = this.generateFile(userName);
    String[] command = new String[4];
    command[0] = "cmd";
    command[1] = "/C";
    command[2] = "dir";
    command[3] = "7za a "+ userName+".7z  "+ fileName +" -p"+this.password;
    try {  
        Process p = Runtime.getRuntime().exec(command);
        BufferedReader stdInput = new BufferedReader(new
        InputStreamReader(p.getInputStream()));

        BufferedReader stdError = new BufferedReader(new
        InputStreamReader(p.getErrorStream()));

        while ((s = stdError.readLine()) != null) {
        System.out.println(s);
        }

        ProcessBuilder proc = new ProcessBuilder(command[3]);
        proc.start();
    } catch(Exception e) {  
        System.out.println(e.toString());  
        e.printStackTrace();  
    }  
}

我尝试了两种在JAVA中运行命令行的方式。他们都没有工作。谁能告诉我我做错了什么。我尝试了 3 个小时但没有成功:(

我不断收到此错误 File Not Found …

当尝试解析网站的 html 页面时，它会因错误而崩溃：

java.io.IOException：标记已失效。

我的部分代码：

String xml = xxxxxx;
try {
    Document document = Jsoup.connect(xml).maxBodySize(1024*1024*10)
            .timeout(0).ignoreContentType(true)
            .parser(Parser.xmlParser()).get();

    Elements elements = document.body().select("td.hotv_text:eq(0)");

    for (Element element : elements) {
        Element element1 = element.select("a[href].hotv_text").first();
        hashMap.put(element.text(), element1.attr("abs:href"));
    }
} catch (HttpStatusException ex) {
    Log.i("GyWueInetSvc", "Exception while JSoup connect:" + xml +" cause:"+ ex.getMessage());
} catch (IOException e) {
    e.printStackTrace();
    throw new RuntimeException("Socket timeout: " + e.getMessage(), e);
}

我要解析的网站大小约为 2MB。当我调试代码时，我看到在 java 包ConstrainableInputStream.java方法中：

public void reset() throws IOException {
    super.reset();remaining = maxSize - …

我试图引用计算机上的某个位置,但是Java告诉我语法错误.

这条线是否正确？

文件newlyUploadedFile = new File("D:\\"+ fileName);

问题是文件被正确上传到我希望它去的位置,但是我得到了错误:

java.io.IOException:文件名,目录名或卷标语法不正确

我正在尝试在程序中加载.csv文件但由于某种原因,它无法找到该文件.我应该在哪里放置文件？

安慰

我试图连接到服务器,而不是以Json格式接收一些数据.这是我的java代码:

HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet("https://my.server.com/validate/" + data);
request.setHeader("Accept", "application/json");
request.setHeader("X-AuthToken","my authorisation code");
HttpResponse response = client.execute(request);

我也有

<permission android:name="android.permission.INTERNET"></permission>

作为manifest.xml中的manifest(不是application)的子代

当我尝试在浏览器中打开网址时,我得到了正确的页面但我没有得到任何数据,因为它错过了身份验证.我也有很好的联系.

我一直试图解决这个问题几个小时,但我仍然在client.execute(请求)的行中获得IOException

java.net.UnknownHostException: my.server.com

有任何想法吗？:) 谢谢!

我的文件系统上有以下现有的目录结构(使用ext4的Ubuntu 12.04桌面):

/
    home/
        myuser/
            .myapp/
                logs/
                    myapp.log
                data/
                lib/

...以及以下Java代码:

try {
    // If no such file exists, create it and write zero (0) to it.
    if(!myFile.exists()) {
        System.out.println("myFile is: " + myFile.getAbsolutePath());
        myFile.createNewFile();
        myFileWriter.write("0"); // Configured to write to myFile
    }
} catch(IOException ioExc) {
    logger.error(ExceptionUtils.getStackTrace(ioExc));
    throw new RuntimeException(ioExc);
}

......抛出以下异常:

myFile is: /home/myuser/.myapp/data/replay/Loader-0-replay.log
java.lang.RuntimeException: java.io.IOException: No such file or directory
    at net.myuser.myapp.tools.myapp.Loader.<init>(Loader.java:69)
    at net.myuser.myapp.tools.myapp.MyAppTool.loadWords(MyAppTool.java:125)
    at net.myuser.myapp.tools.myapp.MyAppTool.run(MyAppTool.java:65)
    at net.myuser.myapp.tools.myapp.MyAppTool.main(MyAppTool.java:41)
Caused by: java.io.IOException: No such file or …

我试图将输入流图像写入OutputStream以在浏览器中显示图像,这是代码:

try
{
    InputStream input = Filer.readImage("images/test.jpg");
    byte[] buffer = new byte[1024];
    int bytesRead;
    while ((bytesRead = input.read(buffer)) != -1)
    {
        responseBody.write(buffer, 0, bytesRead);
    }
}
catch(IOException e)
{
    System.out.println(e);
}

readImage:

public static InputStream readImage(String file) throws IOException {
    try (InputStream input = new FileInputStream(file)) {

        return input;
    }
}

但写作时我收到错误:

java.io.IOException: Stream Closed

有任何想法吗？

任何人都可以告诉我为什么这个程序不起作用.你应该创建一个汇总双值的文件.当我运行程序时,它会读取文件但不显示总和.

import java.util.*;
import java.io.*;
public class TheGradesArrays
{
public static void main(String [] args)
{
    Scanner scan = new Scanner (System.in);
    Scanner infile=null;
    boolean isValid;
    String name;
    do
    {
        isValid=true;
        System.out.print("Enter the name of the file: ");
        name=scan.nextLine();
        try
        {       
            infile = new Scanner (new FileInputStream (name+".txt"));
        }
        catch(IOException fe)
        {
            System.out.println("The name is not valid! Renter the name."+fe);
            fe.printStackTrace();
            isValid=false;

        }
    }while(! isValid );

    double sum=0,grade;
    while(infile.hasNextDouble());
    {
        grade=infile.nextDouble();
        sum+=grade;
    }

    System.out.print("The Sum = "+sum);

}
}

Java将不会让我createNewFile,因为我想创建不存在,对此,文件咄,这就是为什么我要创建它.这是我的代码片段.

System.out.println("Please input the path of the install directory.");

System.out.print(">");
installLocation = input.nextLine();

File spreadsheet = new File (installLocation + "diatracker.csv");
File settingsFile = new File (installLocation + "settings.txt");


if ( spreadsheet.exists() )
{
    if ( isValidFile ( spreadsheet.toString() ) )
    {
        //do nothing
    }
    else
    {
        spreadsheet.delete();
        spreadsheet.createNewFile();
    }
}
else
{
    spreadsheet.createNewFile();
}

这是我的错误.

请输入安装目录的路径.

C:\ Users \用户DigiDuncan \桌面\ DiaTracker \

Exception in thread "main" java.io.IOException: The system cannot find the path specified
    at java.io.WinNTFileSystem.createFileExclusively(Native Method) …