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作者: 人生丶    时间: 2018-12-27 13:01
标题: 【成都校区】

import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.util.Random;

@WebServlet("/zm")
public class yzm extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        int width=300;//设置宽度
        int height=150; //设置高度
        BufferedImage buff = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        //设置画笔工具用于画图形
        Graphics g = buff.getGraphics();
        //设置底色
        g.setColor(Color.cyan);
        g.fillRect(0,0,width,height);
        //设置干扰线条
        g.setColor(Color.BLUE);
        g.drawRect(0,0,width-1,height-1);
        //生成随机所需要的验证码
        String str="QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm1234567890";
        //生成随机字母
        Random random = new Random();
        for (int i = 1; i <= 4; i++) {
            int i1 = random.nextInt(str.length());
            char c = str.charAt(i1);
            g.drawString(c+"",width/5*i,height/2);
        }
        g.setColor(Color.GREEN);
        for (int i = 0; i < 10; i++) {
            int i1 = random.nextInt(width);
            int i2 = random.nextInt(width);

            int i3 = random.nextInt(height);
            int i4 = random.nextInt(height);
        g.drawLine(i1,i3,i2,i4);
        }
        ImageIO.write(buff,"jpg",response.getOutputStream());
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}

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