hibernate文件上传详解，可以直接使用

需要先在Tomcat服务器下建立一个upload文件
package cn.jbit.auction.web;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;

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

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.hibernate.Hibernate;

import cn.jbit.auction.biz.IAuctionBiz;
import cn.jbit.auction.biz.impl.AuctionBizImpl;
import cn.jbit.auction.entity.Auction;
import cn.jbit.auction.util.Tool;

public class AddAuctionServlet extends EncodingServlet {

    /**
     * The doGet method of the servlet. <br>
     * 
     * This method is called when a form has its tag value method equals to get.
     * 
     * @param request
     *            the request send by the client to the server
     * @param response
     *            the response send by the server to the client
     * @throws ServletException
     *             if an error occurred
     * @throws IOException
     *             if an error occurred
     */
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        this.doPost(request, response);
    }

    /**
     * The doPost method of the servlet. <br>
     * 
     * This method is called when a form has its tag value method equals to
     * post.
     * 
     * @param request
     *            the request send by the client to the server
     * @param response
     *            the response send by the server to the client
     * @throws ServletException
     *             if an error occurred
     * @throws IOException
     *             if an error occurred
     */
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        try {
            String uploadFileName = ""; // 上传的文件名
            String fieldName = ""; // 表单字段元素的name属性值(name的值)
            System.out.println("fieldName="+fieldName);
            // 判断从表单中请求信息中的内容是否是multipart类型
            boolean isMultipart = ServletFileUpload.isMultipartContent(request);
            //System.out.println("isMultipart="+isMultipart);
            // 上传文件的存储路径（服务器文件系统上的绝对文件路径）在tomcat下面
            String uploadFilePath = request.getSession().getServletContext()
                    .getRealPath("upload/");
            //System.out.println("uploadFilePath="+uploadFilePath);
            //uploadFilePath=C:Program FilesApache Software FoundationTomcat 7.0webappsauctionupload
            File fullFile = null;
            String fileType=null;
            Auction auction = new Auction();
            if (isMultipart) {
                //为该请求创建一个DiskFileItemFactory对象，通过它来解析请求
                FileItemFactory factory = new DiskFileItemFactory();
                //System.out.println("factory="+factory);
                //factory=org.apache.commons.fileupload.disk.DiskFileItemFactory@1cd6b3c
                ServletFileUpload upload = new ServletFileUpload(factory);
                // System.out.println("upload="+upload);
                 //upload=org.apache.commons.fileupload.servlet.ServletFileUpload@13b4ed0
                // 解析form表单中所有文件
                List<FileItem> items = upload.parseRequest(request);
            //    System.out.println("items="+items);
//items=[
//name=null, StoreLocation=C:Program FilesApache Software FoundationTomcat 7.0	empupload_191a43d9_1550ef75687__8000_00000014.tmp,
                //size=6bytes, isFormField=true, FieldName=auctionName, 
//name=null, StoreLocation=C:Program FilesApache Software FoundationTomcat 7.0	empupload_191a43d9_1550ef75687__8000_00000015.tmp, 
                //size=5bytes, isFormField=true, FieldName=startPrice,
//name=null, StoreLocation=C:Program FilesApache Software FoundationTomcat 7.0	empupload_191a43d9_1550ef75687__8000_00000016.tmp, 
                //size=5bytes, isFormField=true, FieldName=upset,
//name=null, StoreLocation=C:Program FilesApache Software FoundationTomcat 7.0	empupload_191a43d9_1550ef75687__8000_00000017.tmp,
                //size=19bytes, isFormField=true, FieldName=startTime, 
//name=null, StoreLocation=C:Program FilesApache Software FoundationTomcat 7.0	empupload_191a43d9_1550ef75687__8000_00000018.tmp, 
                //size=19bytes, isFormField=true, FieldName=endTime, 
//name=C:Program FilesApache Software FoundationTomcat 7.0webappsauctionupload290578.jpg,
                //StoreLocation=C:Program FilesApache Software FoundationTomcat 7.0	empupload_191a43d9_1550ef75687__8000_00000019.tmp,
                //size=208079bytes, isFormField=false, FieldName=pic, 
//name=null, StoreLocation=C:Program FilesApache Software FoundationTomcat 7.0	empupload_191a43d9_1550ef75687__8000_00000020.tmp, 
                //size=7bytes, isFormField=true, FieldName=desc]            
                Iterator<FileItem> iter = items.iterator();
                System.out.println("iter="+iter);
//iter=java.util.AbstractList$Itr@b34fdc
                while (iter.hasNext()) { // 依次处理每个文件
                    FileItem item = (FileItem) iter.next();
                    //System.out.println("item="+item);
//item=
//name=null, StoreLocation=C:Program FilesApache Software FoundationTomcat 7.0	empupload_191a43d9_1550ef75687__8000_00000014.tmp,
//size=6bytes, isFormField=true, FieldName=auctionName                
                    if (item.isFormField()) { // 普通表单字段
                        fieldName = item.getFieldName(); // 表单字段的name属性值
                        //System.out.println("item="+item);
                        String value=item.getString("UTF-8");
                        //System.out.println("value="+value);
                        // 获取表单字段的值
                        if (fieldName.equals("auctionName")) {
                            auction.setAuctionname(value);                                                
                        }
                        if (fieldName.equals("startPrice")) {
                            auction.setAuctionstartprice(new Double(value));                            
                        }
                        if (fieldName.equals("upset")) {
                            auction.setAuctionupset(new Double(value));
                        }
                        if (fieldName.equals("startTime")) {
                            auction.setAuctionstarttime(new java.sql.Timestamp(Tool.strToDate(
                                    value, "yyyy-MM-dd HH:mm:ss").getTime()));//把long转换为Timestamp类型                            
//Tool.strToDate(value, "yyyy-MM-dd HH:mm:ss").getTime())先把str类型转换为date类型，然后再把date类型转换为1970年至今的毫秒数
                            //System.out.println("Too="+Tool.strToDate(value, "yyyy-MM-dd HH:mm:ss").getTime());
                                                //Too=1291177800000毫秒数
                        }
                        if (fieldName.equals("endTime")) {
                            auction.setAuctionendtime(new java.sql.Timestamp(Tool.strToDate(
                                    value, "yyyy-MM-dd HH:mm:ss").getTime()));        
                        }
                        if (fieldName.equals("desc")) {
                            auction.setAuctiondesc(value);    
                        }        
                    } else { // 文件表单字段
                        String fileName = item.getName();
                        if (fileName != null && !fileName.equals("")) {
                            fullFile = new File(item.getName());
                            System.out.println("fullFile="+fullFile);
                            
                            System.out.println("fullFile.getName()="+fullFile.getName());
                            File saveFile = new File(uploadFilePath,
                                    fullFile.getName());
                            item.write(saveFile);                            
                            uploadFileName = fullFile.getName();
                            fileType=uploadFileName.substring(uploadFileName.lastIndexOf(".")+1);
                            System.out.println("上传成功后的文件名是：" + uploadFileName);
                        }
                    }
                }
            }
            InputStream is = new FileInputStream(fullFile);
            byte[] byteArray = new byte[is.available()];
            is.read(byteArray);
            is.close();
            IAuctionBiz biz = new AuctionBizImpl();            
            //设置图片数据
            auction.setAuctionpic(Hibernate.createBlob(byteArray));
            //设置图片类型
            auction.setAuctionpictype(fileType);
            biz.add(auction);
            response.sendRedirect("auctionList");
        } catch (Exception e) {
            e.printStackTrace();
            request.setAttribute("message", e.getMessage());
            request.getRequestDispatcher("error.jsp").forward(request,response);
        }
    }

    /**
     * Initialization of the servlet. <br>
     * 
     * @throws ServletException
     *             if an error occurs
     */
    public void init() throws ServletException {
        // Put your code here
    }

}

Auction实体类的代码

package cn.jbit.auction.entity;

import java.sql.Blob;
import java.sql.Timestamp;
import java.util.HashSet;
import java.util.Set;

/**
 * Auction entity. @author MyEclipse Persistence Tools
 */

public class Auction implements java.io.Serializable {

    // Fields

    private Integer auctionid;
    private String auctionname;
    private Double auctionstartprice;
    private Double auctionupset;
    private Timestamp auctionstarttime;
    private Timestamp auctionendtime;
    private Blob auctionpic;
    private String auctionpictype;
    private String auctiondesc;
    private Set auctionrecords = new HashSet(0);
    private String picName;

    // Constructors

    public String getPicName() {
        return picName;
    }

    public void setPicName(String picName) {
        this.picName = picName;
    }

    /** default constructor */
    public Auction() {
    }

    /** minimal constructor */
    public Auction(String auctionname, Double auctionstartprice,
            Double auctionupset, Timestamp auctionstarttime,
            Timestamp auctionendtime, Blob auctionpic, String auctionpictype) {
        this.auctionname = auctionname;
        this.auctionstartprice = auctionstartprice;
        this.auctionupset = auctionupset;
        this.auctionstarttime = auctionstarttime;
        this.auctionendtime = auctionendtime;
        this.auctionpic = auctionpic;
        this.auctionpictype = auctionpictype;
    }

    /** full constructor */
    public Auction(String auctionname, Double auctionstartprice,
            Double auctionupset, Timestamp auctionstarttime,
            Timestamp auctionendtime, Blob auctionpic, String auctionpictype,
            String auctiondesc, Set auctionrecords) {
        this.auctionname = auctionname;
        this.auctionstartprice = auctionstartprice;
        this.auctionupset = auctionupset;
        this.auctionstarttime = auctionstarttime;
        this.auctionendtime = auctionendtime;
        this.auctionpic = auctionpic;
        this.auctionpictype = auctionpictype;
        this.auctiondesc = auctiondesc;
        this.auctionrecords = auctionrecords;
    }

    // Property accessors

    public Integer getAuctionid() {
        return this.auctionid;
    }

    public void setAuctionid(Integer auctionid) {
        this.auctionid = auctionid;
    }

    public String getAuctionname() {
        return this.auctionname;
    }

    public void setAuctionname(String auctionname) {
        this.auctionname = auctionname;
    }

    public Double getAuctionstartprice() {
        return this.auctionstartprice;
    }

    public void setAuctionstartprice(Double auctionstartprice) {
        this.auctionstartprice = auctionstartprice;
    }

    public Double getAuctionupset() {
        return this.auctionupset;
    }

    public void setAuctionupset(Double auctionupset) {
        this.auctionupset = auctionupset;
    }

    public Timestamp getAuctionstarttime() {
        return this.auctionstarttime;
    }

    public void setAuctionstarttime(Timestamp auctionstarttime) {
        this.auctionstarttime = auctionstarttime;
    }

    public Timestamp getAuctionendtime() {
        return this.auctionendtime;
    }

    public void setAuctionendtime(Timestamp auctionendtime) {
        this.auctionendtime = auctionendtime;
    }

    public Blob getAuctionpic() {
        return this.auctionpic;
    }

    public void setAuctionpic(Blob auctionpic) {
        this.auctionpic = auctionpic;
    }

    public String getAuctionpictype() {
        return this.auctionpictype;
    }

    public void setAuctionpictype(String auctionpictype) {
        this.auctionpictype = auctionpictype;
    }

    public String getAuctiondesc() {
        return this.auctiondesc;
    }

    public void setAuctiondesc(String auctiondesc) {
        this.auctiondesc = auctiondesc;
    }

    public Set getAuctionrecords() {
        return this.auctionrecords;
    }

    public void setAuctionrecords(Set auctionrecords) {
        this.auctionrecords = auctionrecords;
    }

}

Auction实体类的映射文件

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- 
    Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
    <class name="cn.jbit.auction.entity.Auction" table="AUCTION">
        <id name="auctionid" type="java.lang.Integer">
            <column name="AUCTIONID" precision="6" scale="0" />
            <generator class="increment" />
        </id>
        <property name="auctionname" type="java.lang.String">
            <column name="AUCTIONNAME" not-null="true" />
        </property>
        <property name="auctionstartprice" type="java.lang.Double">
            <column name="AUCTIONSTARTPRICE" precision="9" not-null="true" />
        </property>
        <property name="auctionupset" type="java.lang.Double">
            <column name="AUCTIONUPSET" precision="9" not-null="true" />
        </property>
        <property name="auctionstarttime" type="java.sql.Timestamp">
            <column name="AUCTIONSTARTTIME" length="11" not-null="true" />
        </property>
        <property name="auctionendtime" type="java.sql.Timestamp">
            <column name="AUCTIONENDTIME" length="11" not-null="true" />
        </property>
        <property name="auctionpic" type="java.sql.Blob">
            <column name="AUCTIONPIC" not-null="true" />
        </property>
        <property name="auctionpictype" type="java.lang.String">
            <column name="AUCTIONPICTYPE" not-null="true" />
        </property>
        <property name="auctiondesc" type="java.lang.String">
            <column name="AUCTIONDESC" />
        </property>
        <set name="auctionrecords" inverse="true" order-by="auctionprice desc">
            <key>
                <column name="AUCTIONID" precision="6" scale="0" not-null="true" />
            </key>
            <one-to-many class="cn.jbit.auction.entity.Auctionrecord" />
        </set>
    </class>
</hibernate-mapping>

 jsp文件

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<link href="css/common.css" rel="stylesheet" type="text/css" />
<link href="css/style.css" rel="stylesheet" type="text/css" />
<script type="text/javascript">
    function $(id){
        return document.getElementById(id);
    }
    function checkAuctionName(){
        if($("auctionName").value==""){
            $("nameid").style.display="block";
            return false;
        }else{
            $("nameid").style.display="none";
            return true;
        }
    }
    
    function checkStartPrice(){
        if(($("startPrice").value=="")||(isNaN($("startPrice").value)==true)){
            $("startPriceid").style.display="block";
            return false;
        }else{
            $("startPriceid").style.display="none";
            return true;
        }
    }
    
    function checkUpset(){
        if(($("upset").value=="")||(isNaN($("upset").value)==true)){
            $("upsetid").style.display="block";
            return false;
        }else{
            $("upsetid").style.display="none";
            return true;
        }        
    }
    
    function checkStartTime(){
        if($("startTime").value==""){
            $("startTimeid").style.display="block";
            return false;
        }else{
            $("startTimeid").style.display="none";
            return true;
        }        
    }
    
    function checkEndTime(){
        if($("endTime").value==""){
            $("endTimeid").style.display="block";
            return false;
        }else{
            $("endTimeid").style.display="none";
            return true;
        }        
    }
    function checkValue(){
        if((checkAuctionName()&&checkStartPrice()&&checkUpset()&&checkStartTime()&&checkEndTime())==true){                
            if($("pic").value==""){
                $("picid").style.display="block";
                return false;
            }else{
                $("picid").style.display="none";
                return true;
            }
        }
        return false;
    }
    function showPic(){
        $("imgid").src=$("pic").value;/*考虑到安全性和兼容性问题，发布拍卖品时，图片可以不显示*/
    }
</script>
</head>

<body>
        <form action="addAuction" enctype="multipart/form-data" method="post" onsubmit="return checkValue()">
<div class="wrap">
  <!-- main begin-->
  <div class="sale">
    <h1 class="lf">在线拍卖系统</h1>
    <c:if test="${not empty sessionScope.user}">
        <div class="logout right"><a href="doLogout" title="注销">注销</a></div>
    </c:if>
    <c:if test="${empty sessionScope.user}">
        <div class="logout right"><a href="login.jsp" title="登录">登录</a></div>
    </c:if>
  </div>
      <div class="login logns produce">
        <h1 class="blues">拍卖品信息</h1>
          <dl>
            <dd >
              <label>名称：</label>
              <input type="text" onblur="checkAuctionName()" name="auctionName" class="inputh lf" value="" />
              <div id="nameid" class="lf red laba">名称不能为空</div>
            </dd>
            <dd>
              <label>起拍价：</label>
              <input type="text" onblur="checkStartPrice()" name="startPrice" class="inputh lf" value="" />
              <div id="startPriceid" class="lf red laba">必须为数字</div>
            </dd>
            <dd>
              <label>底价：</label>
              <input type="text" name="upset" class="inputh lf" onblur="checkUpset()" value="" />
              <div id="upsetid" class="lf red laba">必须为数字</div>
            </dd>
            <dd>
              <label>开始时间：</label>
              <input type="text" name="startTime" class="inputh lf" value="" onblur="checkStartTime()"/>
              <div id="startTimeid" class="lf red laba">格式：2010-05-05 12:30:00</div>
            </dd>
            <dd>
              <label>结束时间：</label>
              <input type="text" name="endTime" class="inputh lf" value="" onblur="checkEndTime()"/>
              <div id="endTimeid" class="lf red laba">格式：2010-05-06 16:30:00</div>
            </dd>
            <dd class="dds">
              <label>拍卖品图片：</label>
               <div class="lf salebd"><img id="imgid" src="images/ad20.jpg" width="100" height="100" /></div>
              <input name="pic" type="file" class="offset10 lf"  onchange="showPic()"/>
             <div id="picid" class="lf red laba">请上传图片</div>
            </dd>
             <dd class="dds">
              <label>描述：</label>
              <textarea name="desc" cols="" rows="" class="textarea"></textarea>
            </dd>
            <dd class="hegas">
                <input type="submit" value="保 存" class="spbg buttombg buttombgs buttomb f14 lf" />
                <input type="reset" value="取 消" class="spbg buttombg buttombgs buttomb f14 lf" />
            </dd>
          </dl>
    </div>
<!-- main end-->
<!-- footer begin-->

</div>
 <!--footer end-->
 
    </form>
</body>
</html>