Java：通过处理数据流在网页中显示图像

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通过处理数据流在网页中显示图像

类别：Java 点击：0 评论：0 推荐：

动态加工原有的图像文件，显示到网页

GetImage.java
Servlet 映射为\getimage

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class GetImage extends HttpServlet
{
public void doGet(HttpServletRequest request,HttpServletResponse response)
throws IOException, ServletException
{
  //通过request中的参数取得file

  String img=request.getParameter("imgid");
  File file=new File("D:\\MyPath\\"+img);
  InputStream fis=new FileInputStream(file);
  int length=(int)file.length();

  byte[] image=new byte[length];

  fis.read(image);

  {
  //加工JPG
  //MyUtil.draw(image);
  }
  //JPG回显
  if (file!=null)
  {
   response.setContentType("IMAGE/JPG");
   OutputStream output = response.getOutputStream();
   response.setContentLength(image.length);
   output.write(image);
   output.close();
   response.reset();
  }
}
public void doPost(HttpServletRequest request,HttpServletResponse response)
throws IOException, ServletException{
  doGet(request,response);

}
}

View.jsp

<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<%@ page language="java"%>
<%@ page contentType="text/html; charset=gb2312"%>
<title>DRAWJPG TEST</title>
</head>
<body>
<div align=center>
<img src="getimg?imgid=aa.jpg" >
</div>
</body>
</html>

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