package com.serv;import java.awt.Color;import java.awt.Graphics;import java.awt.image.BufferedImage;import java.io.IOException;import java.util.Random;import javax.imageio.ImageIO;import javax.servlet.ServletException;import javax.servlet.ServletOutputStream;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;@WebServlet(urlPatterns={"/Servyzm"})public class Servyzm extends HttpServlet {        @Override    protected void doGet(HttpServletRequest req, HttpServletResponse resp)            throws ServletException, IOException {        // TODO 自动生成的方法存根        doPost(req, resp);    }    @Override    protected void doPost(HttpServletRequest req, HttpServletResponse resp)            throws ServletException, IOException {        // TODO 自动生成的方法存根        Random r = new Random();        //创建图片缓冲流        BufferedImage buf = new BufferedImage(70, 25, BufferedImage.TYPE_INT_RGB);        Graphics g = buf.getGraphics();//获取图片的画布对象        g.fillRect(0, 0, 70,25);//从左上角开始(0,0)坐标开始填充白色,宽70,高25        g.setColor(new Color(150,150,150));//指定的是显示的字体的颜色        String str = r.nextInt(9000)+1000+"";        g.drawString(str, 20, 20);// drawString(String str, int x, int y)str指的是输出的文本;x,y指的是距离左上角的位置        for (int i = 0; i < 8; i++) {            int startx = r.nextInt(120);            int starty = r.nextInt(30);            g.setColor(new Color(startx, 232, starty));            g.drawLine(startx, starty, startx + 10, starty + 10);        }        ServletOutputStream out = resp.getOutputStream();// 获取字节流        ImageIO.write(buf, "jpg", out);    }//    public static int getString(){//        //    }}

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