java簡單驗證碼生成與儲存

package com.wensi.util;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.util.Random;

import javax.imageio.ImageIO;

//驗證碼生成

public class CheckDemo {

public static void main(String[] args) throws IOException {

int width = 150;

int height = 35;

BufferedImage image = new BufferedImage(width, height,

BufferedImage.TYPE_INT_RGB);

Graphics g = image.getGraphics();

g.setColor(Color.GRAY);

g.fillRect(1, 1, width-2, height-2);

g.setColor(Color.BLUE);

g.drawRect(0, 0, width, height);

g.setColor(Color.red);

Random r = new Random();

for(int i=0;i<50;i++){

g.drawLine(r.nextInt(width), r.nextInt(height),r.nextInt(width), r.nextInt(height));

}

Font f = new Font("黑體",Font.BOLD,30);

g.setFont(f);

int x = 30;

g.setColor(Color.BLUE);

for(int i =0;i<4;i++){

g.drawString(String.valueOf(r.nextInt(10)),x, 25);

x+=30;

}

File file = new File("E:/photo/tutu.jpg");

ImageIO.write(image, "jpg", file);

}

}