servlet文件上传

jsp：

 

servlet：

/*
*
* 文件上传
*/
public class UploadServlet extends HttpServlet {

/**
* Constructor of the object.
*/
public UploadServlet() {
super();
}

@Override
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {


String url=request.getServletPath();
if(url.contains("add"))
{
//上传路径
String filePath = getServletContext().getRealPath("/")+"upload";
//如果文件夹不存在 则创建这个文件夹
File file = new File(filePath);
if(!file.exists())
{
file.mkdir();
}

request.setCharacterEncoding("UTF-8");

//初始化smartupload对象
SmartUpload upload=new SmartUpload();
upload.initialize(getServletConfig(), request,response);
//设置上传文件大小
upload.setMaxFileSize(1024*1024*2);
//设置上传文件的格式
upload.setAllowedFilesList("jpg,png,gif");
try {
//文件开始上传
upload.upload();
//对文件名字不做修改的上传
//upload.save(filePath);

// 如果要对文件进行重命名 使用saveAs()
String ext = upload.getFiles().getFile(0).getFileExt() ; //取得文件的扩展名
String picname=System.currentTimeMillis()+"";
upload.getFiles().getFile(0).saveAs("/upload/"+picname+"."+ext) ;


//获取表单中的文本框


String name=upload.getRequest().getParameter("name");
Connection con=Dbutil.getconnect();

String insert="insert into product (name,pic) value(?,?)";
PreparedStatement preparedStatement=con.prepareStatement(insert);

preparedStatement.setString(1, name);
preparedStatement.setString(2, picname+"."+ext);
preparedStatement.execute();






String select="select * from product";

preparedStatement=con.prepareStatement(select);

ResultSet r=preparedStatement.executeQuery();
List<Product> list=new ArrayList();
while(r.next())
{
Product product=new Product();
product.setId(r.getInt("id"));
product.setName(r.getString("name"));
product.setPic(r.getString("pic"));
list.add(product);
}
preparedStatement.close();
Dbutil.realConnection(con);

request.setAttribute("list", list);
request.getRequestDispatcher("/jsp/list.jsp").forward(request, response);




} catch (SmartUploadException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}


}