标签: ioexception

错误:未处理的异常类型IOException.

File imgLoc = new File("player.png");
BufferedImage img = ImageIO.read(imgLoc);

如何从文件位置获取bufferedImage？

我知道我在这里做了一些非常错误的事情,但我会坦白地说,我对java的了解非常薄弱.每当我调用dataIn.readLine()时,我都会收到此编译时错误

unreported exception java.io.IOException; must be caught or declared to be thrown

这是代码,我知道命名约定很糟糕,它几乎什么都不做.

import java.io.*; 
public class money {
    public static void main( String[]args ){
        String quarters; 
        String dimes; 
        String nickels; 
        String pennies; 
        int iquarters; 
        int idimes;
        int inickels; 
        int ipennies; 
        BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in)); 

        System.out.println( "Enter the number of quarters. " ); 
        quarters = dataIn.readLine(); 
        System.out.println( "Enter the number of dimes" ); 
        dimes = dataIn.readLine(); 
        System.out.println( "Enter the number of nickels" ); 
        nickels = dataIn.readLine(); 
        System.out.println( "Enter …

这是堆栈跟踪:

java.io.IOException: Resetting to invalid mark
    at java.io.BufferedInputStream.reset(BufferedInputStream.java:433)
    at org.tritonus.share.sampled.file.TAudioFileReader.getAudioInputStream(TAudioFileReader.java:324)
    at javazoom.spi.mpeg.sampled.file.MpegAudioFileReader.getAudioInputStream(Unknown Source)
    at javazoom.spi.mpeg.sampled.file.MpegAudioFileReader.getAudioInputStream(Unknown Source)
    at javax.sound.sampled.AudioSystem.getAudioInputStream(AudioSystem.java:1179)
    at javazoom.jlgui.basicplayer.BasicPlayer.initAudioInputStream(Unknown Source)
    at javazoom.jlgui.basicplayer.BasicPlayer.initAudioInputStream(Unknown Source)
    at javazoom.jlgui.basicplayer.BasicPlayer.open(Unknown Source)
    at BasicPlayerDemo.play(BasicPlayerDemo.java:49)
    at BasicPlayerDemo.main(BasicPlayerDemo.java:24)

似乎其他人也有这个问题:

• 点唱机:没声音？
• 在玩家状态更新上的堆栈跟踪

有什么理由吗？我正在尝试使用JavaZoom类创建一个简单的Java Swing音乐播放器.

当我运行我的android项目时,我的一个用于地理编码的类显示了一个io异常,比如服务不可用我找不到这里的错误,请有人帮我解决这个问题

我的课

String addressInput  = "Santa Clara";

geocoder = new Geocoder(Find_Tab_MainActivity.this);
    List<Address> address;

    address = geocoder.getFromLocationName(addressInput,5);
    if (address == null) {
        alert.showAlertDialog(Find_Tab_MainActivity.this, "Places Error",
                              "Sorry error occured.",
                              false);
    }
    else{
        Address location = address.get(0);
        latitude = location.getLatitude();
        longitude = location.getLongitude();

        System.out.println("radius:");
        nearPlaces = googlePlaces.Keywordsearch(latitude,longitude,radius+40000,"parking",type);

logcat的

   03-07 12:55:09.752: D/Your Location(3625): latitude:37.422005, longitude: -122.084095
    03-07 12:55:09.812: W/System.err(3625): java.io.IOException: Service not Available
    03-07 12:55:09.862: W/System.err(3625):     at android.location.Geocoder.getFromLocationName(Geocoder.java:178)
    03-07 12:55:09.872: W/System.err(3625):     at com.kodspider.parkon.Find_Tab_MainActivity$LoadPlaces.doInBackground(Find_Tab_MainActivity.java:174)
    03-07 12:55:09.872: W/System.err(3625):     at com.kodspider.parkon.Find_Tab_MainActivity$LoadPlaces.doInBackground(Find_Tab_MainActivity.java:1)
    03-07 12:55:09.872: W/System.err(3625):     at android.os.AsyncTask$2.call(AsyncTask.java:185)
    03-07 …

我收到此错误:

                FATAL EXCEPTION: main
        java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = game.Level)
        at android.os.Parcel.writeSerializable(Parcel.java)
        at android.os.Parcel.writeValue(Parcel.java)
        at android.os.Parcel.writeMapInternal(Parcel.java)
        at android.os.Bundle.writeToParcel(Bundle.java)
        at android.os.Parcel.writeBundle(Parcel.java)
        at android.content.Intent.writeToParcel(Intent.java)
        at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java)
        at android.app.Instrumentation.execStartActivity(Instrumentation.java)
        at android.app.Activity.startActivityForResult(Activity.java)
        at android.app.Activity.startActivityForResult(Activity.java)
        at android.app.Activity.startActivity(Activity.java)
        at android.app.Activity.startActivity(Activity.java)
        at menu.AreaAdapter$1.onClick(AreaAdapter.java:93)
        at android.view.View.performClick(View.java)
        at android.view.View$PerformClick.run(View.java)
        at android.os.Handler.handleCallback(Handler.java)
        at android.os.Handler.dispatchMessage(Handler.java)
        at android.os.Looper.loop(Looper.java)
        at android.app.ActivityThread.main(ActivityThread.java)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)
        at dalvik.system.NativeStart.main(Native Method)
        Caused by: java.io.NotSerializableException: menu.AreaActivity
        at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1364)
        at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
        at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:979)
        at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:368) …

我试图从SD卡读取XML文件.路径很好,但它说:

java.io.FileNotFoundException:/file:/mnt/sdcard/Reginfo/output/data.xml(没有这样的文件或目录)

以下是我尝试阅读此文件的方法:

FileInputStream file = new FileInputStream(new File("file://"
                    + Environment.getExternalStorageDirectory()
                    + "/RegInfo/output/data.xml"));

我可以sdCard/RegInfo/output在文件资源管理器中的文件夹中看到此文件.

我试图打开一个使用python存在的文件,如果我在命令行中使用gedit打开它,则打开完美.

但是,我收到以下错误消息:

andreas@ubuntu:~/Desktop/Thesis/Codes/ModifiedFiles$ python vis.py -f myoutputcsv.csv
Matplotlib version 1.3.1
Traceback (most recent call last):
  File "vis.py", line 1082, in <module>
    reliability_table = ReliabilityTable(reliability_table_file)
  File "vis.py", line 112, in __init__
    self.read(filename)
  File "vis.py", line 139, in read
    self.data = genfromtxt(filename, delimiter=',',comments='#', dtype=float)
  File "/usr/lib/python2.7/dist-packages/numpy/lib/npyio.py", line 1344, in genfromtxt
    fhd = iter(np.lib._datasource.open(fname, 'rbU'))
  File "/usr/lib/python2.7/dist-packages/numpy/lib/_datasource.py", line 147, in open
    return ds.open(path, mode)
  File "/usr/lib/python2.7/dist-packages/numpy/lib/_datasource.py", line 496, in open
    raise IOError("%s not found." % path)
IOError: ~/Desktop/Thesis/Codes/ModifiedFiles/reliability_table_2.csv not found.

你知道我可能做错了什么吗？我对python的经验很少,我找不到文件在命令行打开但不使用python的原因.

我发现有时在IO操作中会抛出常见的IOException.我可以使用Marshal.GetHRForException(异常e)方法(在这里找到)来确定特定的错误代码.之后,我想使用我的应用程序特定的错误代码重新抛出异常,以便向用户提供一些错误的提示.但我无法找到IOException的可能HResult值列表.

我坚持的另一件事是,对于不同的HResult代码,根本原因可能是相同的 - 例如,0x8007052E和0x80070569 - 都对应于Logon failure: unknown user name or bad password.

我试图搜索类似"IOException HResult values"之类的东西,但是没有什么特别的用于映射IOException HResult与人类可读的错误(像这样或这样).

我也在这里看到了一个非常相似的问题,但仍然没有解决方案.

那么,有关IOException HResults值的文档在哪里？

class Demo
{
    public static void main(String args[]) throws java.io.IOException
    {
        try(FileInputStream fin = new FileInputStream("Demo.txt"))
        {
            //This block is executed successfully
        }

        System.out.println("Will it be executed if error occurs in try clause");
    }
}

假设代码中的代码try block执行成功,有些代码exception发生try with resource clause,这意味着auto closing文件中发生了异常.

将如何处理该异常try with resource clause？

我想问的是,该异常会被抛到JVM并且会突然终止我的程序并且该println语句不会被执行吗？

我可以捕获该异常,以便还可以执行剩余的程序吗？

我正在使用springboot应用程序。当应用程序部署在外部tomcat服务器上时，我经常遇到以下异常。但是，当我通过springboot的内部tomcat在本地测试应用程序时，它根本不会显示此错误。

org.apache.catalina.connector.ClientAbortException: java.io.IOException: Connection reset by peer
    at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:321)
    at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:284)
    at org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputStream.java:118)
    at org.springframework.security.web.util.OnCommittedResponseWrapper$SaveContextServletOutputStream.flush(OnCommittedResponseWrapper.java:513)
    at com.fasterxml.jackson.core.json.UTF8JsonGenerator.flush(UTF8JsonGenerator.java:1048)
    at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:953)
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:285)
    at org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:100)
    at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:231)
    at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:174)
    at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:81)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:132)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at com.asn.framework.security.CustomAuthenticationTokenFilter.successfulAuthentication(CustomAuthenticationTokenFilter.java:163)
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at com.asn.framework.core.CorsConfigurationFilter.doFilter(CorsConfigurationFilter.java:35)
    at …