<%@page import="java.awt.Graphics2D"%><%@page import="java.util.Random"%><%@page import="java.awt.Font"%><%@page import="javax.imageio.ImageIO"%><%@page import="java.awt.Color"%><%@page import="java.awt.Graphics"%><%@ page import="java.awt.image.BufferedImage"%><%@ page language="java" pageEncoding="utf-8" contentType="image/png" %><%int h = 45;int len = 4;int w = len*20;Random r = new Random();BufferedImage img = new BufferedImage(w,h,BufferedImage.TYPE_INT_RGB);Graphics2D g = (Graphics2D)img.getGraphics();//g.setColor(Color.RED);Color c = new Color(245,245,245);g.setColor(c);g.fillRect(0,0,w,h);String str = "abcdefghijkmnopqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXY3456789";g.setColor(Color.WHITE);for(int i=0;i<20;i++){    g.setFont(new Font("宋体",Font.BOLD,r.nextInt(20)+10));    c = new Color(r.nextInt(255),r.nextInt(255),r.nextInt(255),r.nextInt(50));    String s = String.valueOf(str.charAt(r.nextInt(str.length())));    g.setColor(c);    g.drawString(s, r.nextInt(w),r.nextInt(h));}StringBuffer ss = new StringBuffer();for(int i=0;i<len;i++){    int n = -5 +r.nextInt(10);    g.rotate(n * Math.PI / 180);    g.setFont(new Font("宋体",Font.BOLD,r.nextInt(15)+15));    c = new Color(r.nextInt(255),r.nextInt(255),r.nextInt(255),r.nextInt(55)+200);    String s = String.valueOf(str.charAt(r.nextInt(str.length())));    ss.append(s);    g.setColor(c);    g.drawString(s, 2+i*20,r.nextInt(10)+25);}session.setAttribute("checkcode",ss.toString());//添加干扰线 点for(int i=0;i<10;i++){    c = new Color(r.nextInt(255),r.nextInt(255),r.nextInt(255),r.nextInt(80));    g.setColor(c);    g.drawLine(r.nextInt(w), r.nextInt(h),r.nextInt(w), r.nextInt(h));    int size = r.nextInt(6)+5;    g.fillOval(r.nextInt(w),r.nextInt(h),size,size);}c = new Color(r.nextInt(255),r.nextInt(255),r.nextInt(255),r.nextInt(150));int hh = r.nextInt(h);for(int i=0;i<=300;i++){    g.setColor(c);    double x = i;    double y = hh+15*Math.sin(10*i*Math.PI/360);    g.fillOval((int)x, (int)y, 5,5);}g.dispose();ImageIO.write(img, "png", response.getOutputStream());out.clear();out = pageContext.pushBody();%>