public class getImage extends HttpServlet {
    private static final String CONTENT_TYPE = "text/html; charset=GBK";

    public void init(ServletConfig config) throws ServletException {
        super.init(config);
    }

    public void service(HttpServletRequest request, 
                        HttpServletResponse response) throws ServletException, 
                                                             IOException {
        response.setContentType(CONTENT_TYPE);
        PrintWriter out = response.getWriter();
        Tool tool = new Tool();
        ServletInputStream inStream = request.getInputStream(); //获取上传文件流
        int streamLenth = request.getContentLength(); //获取上传文件的长度

        //将文件存入临时文件中
        FileOutputStream tmpfileStream = null;
        String tmpfileName = null;
        tmpfileName = "c:\\temp\\" + request.getSession().getId();
        tmpfileStream = new FileOutputStream(tmpfileName);
        int bytesRead = 0, totalBytes = 0;
        byte[] cnt;
        while (totalBytes < streamLenth) {
            cnt = new byte[256];
            bytesRead = inStream.read(cnt, 0, 256);
            totalBytes += bytesRead;
            tmpfileStream.write(cnt);
        }
        tmpfileStream.close();
        inStream.close();
        //现已将Http协议上传的内容全部写入了临时文件。以下的代码便可在服务器上对上传的内容进行解释


        //以随机读写方式打开http临时流文件。
        // RandomAccessFile(String name, String mode) - 类 java.io.RandomAccessFile 的构造方法 
        // 创建从中读取和向其中写入（可选）的随机存取文件流，该文件具有指定名称。
        // name - 取决于系统的文件名  mode - 此存取 mode 
        long cntStartPoint = 0, cntEndPoint = 0;
        RandomAccessFile randomFile = null;
        randomFile = new RandomAccessFile(tmpfileName, "rw");
        cntStartPoint = randomFile.getFilePointer();
        String sgmtDeli = randomFile.readLine();
        //out.println(sgmtDeli);
        String line=null;
        boolean eofblock = false;
        while (!eofblock) {
            line = randomFile.readLine();
            //out.println(line+"<br />");
            if(line.equals(sgmtDeli)){
                out.println(line+"<br />");
            }
            if (line.contains(sgmtDeli+"--"))
                eofblock = true;
        }
        
        


        out.close();
    }
    
   // public String cntEndPoint(String line,String sgmtDeli){
   //     String bonuy=
   // }
}

package yuanyifileup;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.PageContext;

public class yuanyifileup
{
private ServletRequest request;
private ServletResponse response;
private ServletConfig config;
ServletInputStream DATA;
int FormSize;
File f1;
FileOutputStream os;
DataInputStream is;
String filename;
byte[] b;
byte t;
bool