jsp图片上传？

Question

用jsp+bean的方式做的程序
需要有一个功能，就是把一个需要上传的图片放到数据库中（不是存放路径，而是二进制文件）
最好有个例子，谢谢

Answer 1

用 apache的commons-fileupload,可以看看他带的例子.

Answer 2

直接数数据流读到数据库中，数据库用blob接受。注意设置大小。

Answer 3

/---------------------将图片存入数据库----------------------------JavaBean:
        Session session = HibernateSessionFactory.currentSession();
        Transaction tx = session.beginTransaction();
        String path = "d:/China.jpg";
        FileInputStream str  = new FileInputStream(path);
        PreparedStatement pstmt = session.connection().prepareStatement("insert into saveimage(image) values(?)");
        pstmt.setBinaryStream(1,str,str.available());
        pstmt.execute();
        pstmt.close();
        str.close();                
        tx.commit();
        HibernateSessionFactory.closeSession();//---------------------将图片显示到网页上----------------------------
Servlet:
        Session sess = HibernateSessionFactory.currentSession();
        Transaction tx = sess.beginTransaction();
        String sql = "select * from saveimage where id = "+getImageForm.get("id");
        PreparedStatement pstmt = sess.connection().prepareStatement(sql);
        ResultSet rs = pstmt.executeQuery();
        rs.next();
        ServletOutputStream sout = response.getOutputStream();
        InputStream in = rs.getBinaryStream("image");
        byte b[] = new byte[0x7a120];
        for(int i = in.read(b); i != -1;){
                sout.write(b);
                in.read(b);
        }
        sout.flush();
        sout.close();
        rs.close();
        tx.commit();
        HibernateSessionFactory.closeSession();

Answer 4

<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<%@page import="java.io.*" %>
<%@page import="java.util.*" %>
<%@ page import = "database_connection.sun_wap_refresh_conn" %>
<jsp:useBean id="myconn1" class="database_connection.sun_wap_refresh_conn" scope="session"/><jsp:setProperty name="myconn1" property="*"/>
<%//上一行的 jsp:useBean id="myconn11" id 不能有重复myconn1.getConn();
CallableStatement cstmt=null;
Statement stmt=myconn1.conn.createStatement();
String url="";
String flag="";
String procedure="";
String id="";
url=request.getParameter("url");
flag=request.getParameter("flag");
id=request.getParameter("id");ResultSet rs=null;if(flag!=null){
if(flag.compareTo("add")==0){BufferedInputStream data;
BufferedInputStream is;
int FormSize;  
byte[] bb;
byte t;  String image="";
data=new BufferedInputStream(request.getInputStream());
FormSize=request.getContentLength(); int i=0,start1=0,start2=0,_start1=0,_start2=0;  
String temp="";  
String _temp="";
String boundary="";
 
is=new BufferedInputStream(data);
bb=new byte[FormSize];  
while (i<FormSize)  
{   
t=(byte)is.read();  
bb[i]=t;  
i++;  
}   
is.close();  
temp=new String(bb,"ISO8859_1");   
_temp=temp;_start1=_temp.indexOf("boundary=");
_temp=_temp.substring(_start1+9); 
_start2=_temp.indexOf("\r\n");
boundary=_temp.substring(0,_start2); _start1=_temp.indexOf(boundary);
_temp=_temp.substring(_start1+boundary.length());
_start1=_temp.indexOf(boundary);
image=_temp.substring(0,_start1);
_temp=_temp.substring(_start1+boundary.length());
_start1=image.indexOf("\r\n\r\n");
_start2=image.lastIndexOf("\r\n");
image=image.substring(_start1+4,_start2);//out.println("username:"+username+"<br>alt_name:"+alt_name+"<br>level:"+level+"<br>image:"+image);procedure="{call sun_insert_ad_pic_image(?,?)}";
cstmt = myconn1.conn.prepareCall(procedure);
cstmt.setString(1,url);
cstmt.setBytes(2,image.getBytes("ISO8859_1"));
cstmt.executeUpdate();
}
if(flag.compareTo("del")==0){
procedure="{call sun_delete_ad_pic_image(?)}";
cstmt = myconn1.conn.prepareCall(procedure);
cstmt.setInt(1,Integer.parseInt(id));
cstmt.executeUpdate();
}}procedure="{call sun_select_ad_pic_image(?)}";
cstmt = myconn1.conn.prepareCall(procedure);
cstmt.setString(1,url);
rs=cstmt.executeQuery();%>
<script language="javascript">
function del(id){
location.replace("edit_keyword_pic.jsp?flag=del&url=<%=url%>&id="+id);
}
</script> <table width="100%" border="0" cellpadding="0" cellspacing="1" bgcolor="#B6EF07">
          <tr>
            <td width="20%" bgcolor="#FFFFFF">ID</td>
            <td width="60%" bgcolor="#FFFFFF">图片</td>
   <td width="20%" bgcolor="#FFFFFF">操作</td>
          </tr>
<%while(rs.next()){
 String _id=rs.getString("id");
 %>
<tr>
<td width="20%" bgcolor="#FFFFFF"><%=_id%></td>
<td width="60%" bgcolor="#FFFFFF"><img src="wc1.jsp?id=<%=_id%>"></td>
<td width="20%" bgcolor="#FFFFFF"><input type="button" onclick="del('<%=_id%>')" value="删除"></td>
</tr>
<%}%>   
        </table>  <form name="form1" action="edit_keyword_pic.jsp?flag=add&url=<%=url%>" method="post" enctype="multipart/form-data">
<input type=file name="image"><input type="submit" value="上传">
  </form> 

Answer 5

http://wenwen.soso.com/z/q151212357.htm

Answer 6

 
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