fileupload form表单提交(包括文件上传)

需要的jar包：commons-fileupload-1.3.1.jar

示例代码：

package com.expai.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONArray;

import com.expai.util.JDBCUtil;

public class PhotoDataServlet extends HttpServlet{
    private static final long serialVersionUID = 1L;

    public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException{
        doPost(request, response);
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException{
        response.setContentType("text/html;charset=UTF-8");
        request.setCharacterEncoding("UTF-8");
        
        JDBCUtil dbUtil = new JDBCUtil();
  
        Integer number = 0;
        Integer pageNum = 0;
//        String size = null;
        
        if(request.getParameter("number")!=null){
            number = Integer.parseInt(request.getParameter("number"));
        }
        if(request.getParameter("pageNum")!=null){
            pageNum = Integer.parseInt(request.getParameter("pageNum"));
        }
//        if(request.getParameter("size")!=null){
//            size = new String(request.getParameter("size").getBytes("ISO-8859-1"), "UTF-8");
//        }
        if(number!=null&&pageNum!=null){
//            String sql = "select id,photoUrl from tb_photo_data where userId = "+userId +" limit "+Integer.parseInt(pageNum)*Integer.parseInt(number)+","+number;
            String sql = "select id,photoUrl,width,height from tb_photo_data limit "+pageNum*number+","+number;
            ArrayList<HashMap<String,Object>> listData = dbUtil.getDataListMapNew(sql);
        
            PrintWriter pWriter = response.getWriter();
            JSONArray json = JSONArray.fromObject(listData);
            pWriter.flush();
            pWriter.print(json);
        }
    }
}