的請求頭:我需要保存一些圖片,我該如何修復ByteArrayInputStream到FileInputStream?
Accept:*/*
Accept-Encoding:gzip, deflate
Accept-Language:zh-CN,zh;q=0.8,en-US;q=0.6,en;q=0.4
Connection:keep-alive
Content-Length:61425
Content-Type:multipart/form-data; boundary=----WebKitFormBoundarysqFOqeLTqOafwiDl
Cookie:JSESSIONID=F98C35E6649DC6997616A2CCB70A946A; save=F98C35E6649DC6997616A2CCB70A946A
Host:192.168.0.105:8080
Origin:http://192.168.0.105:8080
Referer:http://192.168.0.105:8080/list
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36
X-Requested-With:XMLHttpRequest
這是我的代碼:
public boolean muilt(MultipartHttpServletRequest multiReq) throws IOException {
Map<String, MultipartFile> map = multiReq.getFileMap();
List<String> list = new ArrayList<>();
for (String in : map.keySet()) {
MultipartFile str = map.get(in);
System.out.println(str.getSize());
System.out.println(str.getOriginalFilename());
if (str.getSize() != 0) {
list.add(in + "," + url + in + ".jpg");
FileOutputStream fos = new FileOutputStream(new File(url + in + ".jpg"));
FileInputStream fs = (FileInputStream) str.getInputStream();
byte[] buffer = new byte[1024];
int len;
while ((len = fs.read(buffer)) != -1) {
fos.write(buffer, 0, len);
}
fos.close();
fs.close();
}
}
if (list.size() < 7){
return false;
}
for (int i = 0; i < 6; ++i){
String[] sourceStrArray = list.get(i).split(",");
this.split(sourceStrArray[0], sourceStrArray[1]);
}
return true;
}
錯誤代碼:
FileInputStream fs = (FileInputStream) str.getInputStream();
,當它運行時,我得到的問題:
java.lang.ClassCastException:java.i o.ByteArrayInputStream不能在 controller.HanderPhoto.photoHander(HanderPhoto.java:63)在 sun.reflect.NativeMethodAccessorImpl.invoke0 澆鑄到java.io.FileInputStream中在 tools.SplitPhoto.muilt(SplitPhoto.java:87) (本機方法)在 sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 在 sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 在java.lang.reflect.Method.invoke(方法的.java:498)在 org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest 在 ( InvocableHandlerMethod.java:133) 在 org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) 在 org.springframework.web.servlet.mvc.method.annotation。 RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) 在 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) 在 org.springframework.web.servlet.mvc。方法摘要HandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) 在 org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) 在 org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) 在 org.springframework.web .servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846 )
來源是一張圖片,我想把它寫入文件流,我該怎麼辦?
刪除此演員陣容。您可以像從FileInputStream中讀取一樣讀取任何InputStream。 –
您不需要'FileInputStream'來保存數據。你的問題沒有意義。 – EJP