本文介绍了java.nio.file.AccessDeniedException:从系统路径检索图像时的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我一直在按如下方式存储图像
I have been storing the image as follows
if(imgString != null )
{
BufferedImage image = null;
byte[] imageByte;
BASE64Decoder decoder = new BASE64Decoder();
imageByte = decoder.decodeBuffer(imgString);
ByteArrayInputStream bis = new ByteArrayInputStream(imageByte);
image = ImageIO.read(bis);
bis.close();
String realPath = request.getSession().getServletContext().getRealPath("/resources/images/"+studentDetails.getFirstname()+".png");
File outputfile = new File(realPath);
ImageIO.write(image, "png", outputfile);
studentDetails.setStuImg(outputfile.toString());
}
并尝试按以下方式从该位置获取图像
and trying to get the image from that location as follows
if(imagePath != null)
{
byte[] bytes = Files.readAllBytes(Paths.get(imagePath)); // getting exception here
encodedFile = Base64.getEncoder().encodeToString(bytes);
}
请看一下我的stackTrace
please look at my stackTrace
java.nio.file.AccessDeniedException:
at sun.nio.fs.WindowsException.translateToIOException(Unknown Source)
at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
at sun.nio.fs.WindowsFileSystemProvider.newByteChannel(Unknown Source)
at java.nio.file.Files.newByteChannel(Unknown Source)
at java.nio.file.Files.newByteChannel(Unknown Source)
at java.nio.file.Files.readAllBytes(Unknown Source)
at com.rasvek.cms.controller.StudentController.getStudentAdmissionByAdmissionId(StudentController.java:510)
at com.rasvek.cms.controller.StudentController$$FastClassBySpringCGLIB$$cb2af793.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:738)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:52)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:52)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673)
at com.rasvek.cms.controller.StudentController$$EnhancerBySpringCGLIB$$537bb5b8.getStudentAdmissionByAdmissionId(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
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:967)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
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:622)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
我将如何避免这种异常情况，或者我错过了任何事情.
how would I avoid this exception or did I miss any thing .
在某些帖子中，我读到我们需要释放该位置(如果该位置先前已使用过).
in some post I have read that we need to release that location, if that location had used previously.
如果是这种情况，我应该怎么做以及在哪里做?.
if that is the case how and where should i do so ?.
请帮助我.谢谢！.
推荐答案
我尝试了类似的操作，但似乎可行.下面是我的工作代码.
I tried the similar thing and it seems to be working. Below is my working code.
public static void main(String args[]) throws IOException {
BufferedImage bi2 =
new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB);
String realPath = "/Users/xxx/Downloads/image002.png";
File outputfile = new File(realPath);
ImageIO.write(bi2, "png", outputfile);
Path filePath = Paths.get("/Users/xxx/Downloads/image002.png");
byte[] bytes = Files.readAllBytes(filePath);
String encodedFile = Base64.getEncoder().encodeToString(bytes);
System.out.println(encodedFile);
}
它给了我类似
您似乎正在使用Windows，因此可以尝试以下操作，
It seems like you are using windows, so you can try the following,
- 尝试从计算机上的其他位置创建和读取文件.
- 尝试在类似 的路径中使用转义字符\
- Try creating and reading file from some other location on your machine.
- Try escape character \ in the path like
这可能会有所帮助.
- 在Windows资源管理器中打开文件位置，然后检查文件权限.
这可能会有所帮助.
这篇关于java.nio.file.AccessDeniedException:从系统路径检索图像时的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！