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我有一段代碼可以幫助我將圖像保存在服務器上。我需要知道如何在div上顯示保存的圖像。使用JSP檢索和顯示來自服務器的圖像
JSP代碼:
<%String saveFile="";
String contentType = request.getContentType();
if ((contentType != null) && (contentType.indexOf("multipart/form-data") >= 0)) {
DataInputStream in = new DataInputStream(request.getInputStream());
int formDataLength = request.getContentLength();
byte dataBytes[] = new byte[formDataLength];
int byteRead = 0;
int totalBytesRead = 0;
while (totalBytesRead < formDataLength) {
byteRead = in.read(dataBytes, totalBytesRead,formDataLength);
totalBytesRead += byteRead;
}
String file = new String(dataBytes);
saveFile = file.substring(file.indexOf("filename=\"") + 10);
saveFile = saveFile.substring(0, saveFile.indexOf("\n"));
saveFile = saveFile.substring(saveFile.lastIndexOf("\\") + 1,saveFile.indexOf("\""));
int lastIndex = contentType.lastIndexOf("=");
String boundary = contentType.substring(lastIndex + 1,contentType.length());
int pos;
pos = file.indexOf("filename=\"");
pos = file.indexOf("\n", pos) + 1;
pos = file.indexOf("\n", pos) + 1;
pos = file.indexOf("\n", pos) + 1;
int boundaryLocation = file.indexOf(boundary, pos) - 4;
int startPos = ((file.substring(0, pos)).getBytes()).length;
int endPos = ((file.substring(0, boundaryLocation)).getBytes()).length;
saveFile="D:/../images/"+saveFile;
File f = new File(saveFile);
FileOutputStream fileOut = new FileOutputStream(f);
fileOut.write(dataBytes, startPos, (endPos - startPos));
fileOut.flush();
fileOut.close();
}%>
使用Servlet而不是JSP.And是什麼問題? –
當我瀏覽圖像並調用這個jsp頁面。圖像已成功保存在D:/../圖像文件夾中,但我不知道如何檢索該圖像並在html上顯示。 關於servlet。我並不清楚這一點。有沒有任何在服務器上保存圖像的例子? –
您_will_需要一個servlet。檢查[例如,如何使用在響應中包含圖像的Servlet顯示JSP頁面(http://stackoverflow.com/questions/6347752))。 –