Struts2+Hibernate3将图片保存于mysql数据库并将其显示在JSP页面

      这两天研究了一下图片存储在mysql数据库中，并显示在jsp页面上。

      我创建的数据库只有一个表image(id int,image blob)；

 
  
   
  
  
  
 
 

 

上传文件页面：upImages.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix = "s" uri="/struts-tags"%>

 
       
       
   

 

 

struts.xml文件：

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

   
       
           
      
               
                    image/bmp,image/png,image/gif,image/jpg
               
                40480
           
           
           
               /upImages.jsp
           
           
       http://www.baidu.com
      
      
       http://www.baidu.com
      
      
       /showPicture.jsp
      
       
   

显示图片页面：showPicture.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

 
   
   
   
   
 
 
    
 
 
 

 
 
 
   
 

 

应下面网友要求，先将action主要代码贴出来

 public class MyUpAction extends ActionSupport{ private File upload = null; private String uploadContentType;//文件类型,这两个属性，Struts2自动会解析 private String uploadFileName; //文件名 HttpServletResponse response = ServletActionContext.getResponse(); ServletOutputStream sout;//二进制流可以直接在jsp页面显示 public String execute(){ System.out.println(upload); System.out.println(uploadContentType); System.out.println(uploadFileName); if(uploadFileName == null) { this.addFieldError("upload", "请选择文件"); System.out.println("sdfasdf"); } else{ try{ Images img = new Images(); FileInputStream str=new FileInputStream(upload); Blob photo = Hibernate.createBlob(str); //img.setId(1); img.setImage(photo); ImagesDAO imagesDAO = new ImagesDAOImpl(); imagesDAO.save(img); }catch(IOException e){ e.printStackTrace(); } } return SUCCESS; } public String getImage(){ ImagesDAO imagesDAO = new ImagesDAOImpl(); Images img = imagesDAO.findById(3); Blob photo = img.getImage(); try { InputStream in = photo.getBinaryStream(); sout = response.getOutputStream(); byte b[] = new byte[1024]; int len = in.read(b); while(len!=-1){ sout.write(b); len = in.read(b); } sout.flush(); sout.close(); in.close(); } catch (SQLException e) { e.printStackTrace(); return "error"; }catch (IOException e){ e.printStackTrace(); return "error"; } return "show"; } }