<%@ page contentType="image/jpeg" import="java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*" %><%
Color getRandColor(int fc,int bc){ Random random=new Random();
if(fc>255) fc=255;
if(bc>255) bc=255;
int r=fc+random.nextInt(bc-fc);
int g=fc+random.nextInt(bc-fc);
int b=fc+random.nextInt(bc-fc);
return new Color(r,g,b);}
%>
<%reponse.setHeader("Pragma","no-cache");
reponse.setHeader("Cache-Control","no-cache");
response.setDataHeader("Expires","0");
%>
<%int wid=60,hei=20;
BufferedImage image=new BufferedImage(wid,hei,BufferedImage.TYPE_INT_REG);
Graphics g=new image.getGraphics();
Random random=new Random();
g.setColor(getRandColor(200,250));
g.fillRect(0,0,wid,hei);
g.setFont(new Font("Times New Roman",Font.PLAIN,18));
g.setColor(new Color(255,255,255));
g.drawRect(0,0,wid-1,hei-1);
g.setColor(getRandColor(160,200));
for(int i=0;i<155;i++)
{
int x=random.nextInt(wid);
int y=random.nextInt(hei);
int x1=random.nextInt(12);
int y1=random.nextInt(12);
g.drawLine(x,y,x+x1,y+y1);
}
String sRand="";
for(int i=0;i<4;i++)
{
String rand=String.valueOf(random.nextInt(10));
sRand+=rand;
g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));
g.drawString(rand,13*i+6,16);}
session.setAttribute("rand",sRand);
g.dispose();
ImageIO.write(image,"JPEG",response.getOutputStream());%>
各位帮忙找找哪里错了
Color getRandColor(int fc,int bc){ Random random=new Random();
if(fc>255) fc=255;
if(bc>255) bc=255;
int r=fc+random.nextInt(bc-fc);
int g=fc+random.nextInt(bc-fc);
int b=fc+random.nextInt(bc-fc);
return new Color(r,g,b);}
%>
<%reponse.setHeader("Pragma","no-cache");
reponse.setHeader("Cache-Control","no-cache");
response.setDataHeader("Expires","0");
%>
<%int wid=60,hei=20;
BufferedImage image=new BufferedImage(wid,hei,BufferedImage.TYPE_INT_REG);
Graphics g=new image.getGraphics();
Random random=new Random();
g.setColor(getRandColor(200,250));
g.fillRect(0,0,wid,hei);
g.setFont(new Font("Times New Roman",Font.PLAIN,18));
g.setColor(new Color(255,255,255));
g.drawRect(0,0,wid-1,hei-1);
g.setColor(getRandColor(160,200));
for(int i=0;i<155;i++)
{
int x=random.nextInt(wid);
int y=random.nextInt(hei);
int x1=random.nextInt(12);
int y1=random.nextInt(12);
g.drawLine(x,y,x+x1,y+y1);
}
String sRand="";
for(int i=0;i<4;i++)
{
String rand=String.valueOf(random.nextInt(10));
sRand+=rand;
g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));
g.drawString(rand,13*i+6,16);}
session.setAttribute("rand",sRand);
g.dispose();
ImageIO.write(image,"JPEG",response.getOutputStream());%>
各位帮忙找找哪里错了
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<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@ page contentType="image/jpeg" import="java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*" %>
<%!
Color getRandColor(int fc,int bc){//给定范围获得随机颜色
Random random = new Random();
if(fc>255) fc=255;
if(bc>255) bc=255;
int r=fc+random.nextInt(bc-fc);
int g=fc+random.nextInt(bc-fc);
int b=fc+random.nextInt(bc-fc);
return new Color(r,g,b);
}
%>
<%
//设置页面不缓存
response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires", 0);
// 在内存中创建图象
int width=60, height=20;
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
// 获取图形上下文
Graphics g = image.getGraphics();
//生成随机类
Random random = new Random();
// 设定背景色
g.setColor(getRandColor(200,250));
g.fillRect(0, 0, width, height);
//设定字体
g.setFont(new Font("Times New Roman",Font.PLAIN,18));
//画边框
//g.setColor(new Color());
//g.drawRect(0,0,width-1,height-1);
// 随机产生155条干扰线,使图象中的认证码不易被其它程序探测到
g.setColor(getRandColor(160,200));
for (int i=0;i<155;i++)
{
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x,y,x+xl,y+yl);
}
// 取随机产生的认证码(4位数字)
String sRand="";
for (int i=0;i<4;i++){
String rand=String.valueOf(random.nextInt(10));
sRand+=rand;
// 将认证码显示到图象中
g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));//调用函数出来的颜色相同,可能是因为种子太接近,所以只能直接生成
g.drawString(rand,13*i+6,16);
}
// 将认证码存入SESSION
session.setAttribute("rand",sRand);
// 图象生效
g.dispose();
// 输出图象到页面
ImageIO.write(image, "JPEG", response.getOutputStream());
out.clear();
out = pageContext.pushBody();
%>