[java]
package com.xieyuan;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLEncoder;
import java.util.Random;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.sun.corba.se.impl.javax.rmi.CORBA.Util;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
public class MyServlet extends HttpServlet {
/**
* Constructor of the object.
*/
public MyServlet() {
super();
}
/**
* Destruction of the servlet.
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet.
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
execute(request, response);
}
/**
* The doPost method of the servlet.
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
execute(request, response);
}
private static final char CHARS[]={'2','3','4','5','6','7','8','9','A','B','C','D','E',
'F','G','H','J','K','L','M','N','P','Q','R','S','T','U','V',
'W','X','Y','Z'
};
public static Random random=new Random();
//生成随机数字，len为需要随机数字的个数
public static String getRandomString(int len)
{
StringBuilder builder=new StringBuilder();
for(int i=0;i
{
builder.append(CHARS[random.nextInt(CHARS.length)]) ;
}
return builder.toString();
}
//随机生成颜色，座位背景色
public static Color getColor()
{
return new Color(random.nextInt(255),random.nextInt(255),random.nextInt(255));
}
//取颜色的反色
public static Color getReverseColor(Color color)
{
return new Color(255-color.getRed(),255-color.getGreen(),255-color.getBlue());
}
private void execute(HttpServletRequest request,HttpServletResponse respo