servlet实现图片上传功能
一个简单的servlet例子，实现图片的上传功能，上传的图片给 HttpServletResponse对象
publicclassBackGroundLogoServletextendsHttpServlet
{
privatestaticfinalLoggerm_logger=Logger.getLogger(BackGroundLogoServlet.class);
@Override
publicvoidinit(ServletConfigconfig)throwsServletException{
super.init(config);
m_logger.debug("BackGroundLogoServletinit.");
}
@Override
protectedvoiddoGet(HttpServletRequestrequest,HttpServletResponseresponse)
throwsServletException{
response.setContentType("image/png");
response.setHeader("Access-Control-Allow-Origin","*");
StringfileName=request.getParameter("filename");//获取参数值titlebar_logo.png
Filefile=newFile("D:\\"+fileName);//读取D:\\titlebar_logo.png图片
FileInputStreamfis=null;
BufferedOutputStreamout=null;
try
{
fis=newFileInputStream(file);
out=newBufferedOutputStream(response.getOutputStream());
byte[]buffer=newbyte[1024];
intlen;
while((len=fis.read(buffer))!=-1)
{
//readthefilefromlocaldisk
//writetoclient
out.write(buffer,0,len);
out.flush();
m_logger.debug("backgroundpicuploadsuccess!");
}
}
catch(FileNotFoundExceptione)
{
try
{
response.reset();
//setcontenttypeonceagain
response.setContentType("text/html;charset=utf-8");
//giveerrormessagetoclient
response.getWriter().println("文件未找到");
}
catch(IOExceptione1)
{
e1.printStackTrace();
}
e.printStackTrace();
}
catch(IOExceptione)
{
e.printStackTrace();
}
finally
{
try
{
if(fis!=null){
fis.close();
}
if(out!=null){
out.close();
}
}
catch(IOExceptione)
{
e.printStackTrace();
}
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。