try{
String filePath = (String) request.getAttribute("filePath");// 传文件路径过来
InputStream ins = null;
java.io.File file = new java.io.File(filePath);
ins = new FileInputStream(file);
response.reset();
response.setContentType("image/jpeg");
javax.servlet.ServletOutputStream sos = response.getOutputStream();
byte[] buffer = new byte[8192];
int length = 0;
while ((length = ins.read(buffer, 0, 8192)) != -1) {
sos.write(buffer, 0, length);
}
sos.flush();
sos.close();