jsp中获取Servlet读取的图片

需求：

通过servlet读取图片地址，然后显示在jsp页面上

jsp页面：

 1 <img style="width:240px; height:200px;" src="<%=request.getContextPath()%>/chartServlet"> 

wel.xml 配置：

1 <servlet>

2         <servlet-name>chartServlet</servlet-name>

3         <servlet-class>com.stronginfo.transenly.website.servlet.chartServlet</servlet-class>

4     </servlet>

5     <servlet-mapping>

6         <servlet-name>chartServlet</servlet-name>

7         <url-pattern>/chartServlet</url-pattern>

8     </servlet-mapping>

java代码：

 1 package com.stronginfo.transenly.website.servlet;

 2 

 3 import java.io.FileInputStream;

 4 import java.io.IOException;

 5 

 6 import javax.servlet.ServletException;

 7 import javax.servlet.ServletOutputStream;

 8 import javax.servlet.http.HttpServlet;

 9 import javax.servlet.http.HttpServletRequest;

10 import javax.servlet.http.HttpServletResponse;

11 

12 import com.stronginfo.core.dao.OrderDao;

13 import com.stronginfo.transenly.util.ConfigManager;

14 

15 public class chartServlet extends HttpServlet

16 {

17 

18     private static final long serialVersionUID = 1L;

19 

20    

21     

22 

23     public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException

24     {

25 

26     

27         ServletOutputStream outStream = res.getOutputStream();// 得到向客户端输出二进制数据的对象

28         FileInputStream fis = new FileInputStream(图片路径); // 以byte流的方式打开文件

29         // 读数据

30         byte data[] = new byte[1000];

31         while (fis.read(data) > 0)

32         {

33             outStream.write(data);

34         }

35         fis.close();

36         res.setContentType("image/*"); // 设置返回的文件类型

37         outStream.write(data); // 输出数据

38 

39         outStream.close();

40 

41     }

42 

43 }