jsp_获取图片并显示-CFANZ编程社区

jsp_获取图片并显示
<%@ page language="java" contentType="text/html; charset=GBK" pageEncoding="GBK"%>
<%@ page import="com.suntendy.framework.db.DBPool"%>
<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>Insert title here</title>
</head>
<body>
<%
    Connection con=null;
    Statement stmt=null;
try
{
    con=DBPool.getConn();
    stmt=con.createStatement();
}
catch(SQLException ex)
{
  out.println(ex);
}
//取图片显示
try
{
    response.reset();
    response.setContentType("image/jpeg");
    OutputStream op=response.getOutputStream();
    String sql="select * from zp where id='09000142'";
    ResultSet rs=stmt.executeQuery(sql);
    while(rs.next())
    {
        InputStream is=null;
        is=rs.getBinaryStream("zp");
        int total=0;
        int nread=0;
        byte[] buffer=new byte[4*1024];
        while((nread=is.read(buffer))!=-1)
        {
            op.write(buffer,0,nread);
            total+=nread;
        }
        op.flush();
        op.close();
    }
    rs.close();
}
catch(Exception e)
{
    out.println(e.toString());
}
finally
{
    if(stmt!=null)
    {
        stmt.close();
    }
    if(con!=null)
    {
        DBPool.close(con);
    }
}
%>
</body>
</html>
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