struts hibernate 显示图片 -

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struts hibernate 显示图片

Struts Hibernate JSP Apache XML

Action：
1./**
2.* test show image in jsp
7.*/
8.public ActionForward showImage(ActionMapping mapping, ActionForm form,
9.    HttpServletRequest request, HttpServletResponse response) {
10.   int length = 0;
11.   ServletOutputStream toClient = null;
12.   byte[] buf=null;
13.   CommodityService service = new CommodityService();
14.   List list = service.getCommodityByX(null, null);
15.   Commodity commodity = (Commodity) list.get(2);//取得商品对象
16.   Blob image = commodity.getImage();//取得以blob格式存储图片信息
17.   try {
18.    //is = image.getBinaryStream();//取得二进制流
19.    length = (int)image.length();//取得流中的可用字节总数
20.    //buf=new byte[length];//设定字节数组长度
21.    buf=image.getBytes(1,length);//获取Blob字节数组
22.    response.setContentType("image/jpeg");
23.    toClient=response.getOutputStream();//获取输出流
24.    for (int i = 0; i < buf.length; i++) {
25.     toClient.write(buf[i]);//输出到页面
26.    }
27.    toClient.close();//关闭输出流
28.   } catch (SQLException se) {
29.    se.printStackTrace();
30.   } catch (IOException e) {
31.    e.printStackTrace();
32.   }
33.   return mapping.findForward("showImage");//跳转到指定页面
34.}

===========================================================

配置文件：
1.<?xml version="1.0" encoding="UTF-8"?>
2.<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
3.
4."http://struts.apache.org/dtds/struts-config_1_2.dtd">
5.
6.<struts-config>
7.<data-sources />
8.<form-beans>
9.   <form-bean name="userActionForm" type="com.mt.struts.UserActionForm" />
10.   <form-bean name="commodityForm" type="com.mt.struts.CommodityForm" />
11.</form-beans>
12.
13.<global-exceptions />
14.<global-forwards>
15.   
16.</global-forwards>
17.<action-mappings>
18.   <action attribute="userActionForm" input="/form/userAction.jsp" name="userActionForm" parameter="postMethod"
19.
20.path="/userAction" scope="request" type="com.mt.struts.UserAction">
21.    <forward name="ok" path="/index.jsp" />
22.    <forward name="login" path="/login.jsp" />
23.    <forward name="userList" path="/back/userlist.jsp"></forward>
24.   </action>
25.   <action attribute="commodityForm" input="/form/commodity.jsp" name="commodityForm" parameter="postMethod"
26.
27.path="/commodityAction" scope="request" type="com.mt.struts.CommodityAction">
28.    <forward name="goodList" path="/goodlist.jsp" />
29.    <forward name="goodAdd" path="/back/goodadd.jsp" />
30.    <forward name="showImage" path="/back/showimage.jsp" />
31.   </action>
32.</action-mappings>
33.
34.<message-resources parameter="com.mt.struts.ApplicationResources" />
35.</struts-config>

===========================================================
JSP:
1.<body>
2.    This a struts page. <br>
3.    <html:image src="/commodityAction.do?postMethod=showImage"></html:image>
4.</body>

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