tags: 代码库

该JSP可以生成验证码。以后用到的时候就方便了。

<%@ page language="java" pageEncoding="UTF-8"%><%@ page contentType="image/jpeg"  import="java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*" %><%!	public Color getColor(){		Random random = new Random();		int r = random.nextInt(256);//0-255		int g = random.nextInt(256);		int b = random.nextInt(256);		return new Color(r,g,b);	}	public String getNum(){		String str = "";		Random random = new Random();		for(int i=0;i<4;i++){			str += random.nextInt(10);//0-9		}		return str;	}%><%	response.setHeader("pragma", "mo-cache");	response.setHeader("cache-control", "no-cache");	response.setDateHeader("expires", 0);		BufferedImage image = new BufferedImage(80,30,BufferedImage.TYPE_INT_RGB);		Graphics g = image.getGraphics();	g.setColor(new Color(200,200,200));	g.fillRect(0,0,80,30);			for (int i = 0; i < 30; i++) {		Random random = new Random();		int x = random.nextInt(80);		int y = random.nextInt(30);		int xl = random.nextInt(x+10);		int yl = random.nextInt(y+10);		g.setColor(getColor());		g.drawLine(x, y, x + xl, y + yl);	}			g.setFont(new Font("serif", Font.BOLD,16));	g.setColor(Color.BLACK);	String checkNum = getNum();//"2525"		StringBuffer sb = new StringBuffer();	for(int i=0;i
    
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