ValidateCode图片验证生成

Posted 2023-01-03

代码如下：

package com.popchinese.web.util;


import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Random;

import javax.imageio.ImageIO;

/**
 * 验证码生成器
 * 
 * @author abc
 * 
 */  
public class ValidateCode   
    // 图片的宽度。  
    private int width = 160;  
    // 图片的高度。  
    private int height = 40;  
    // 验证码字符个数  
    private int codeCount = 4;  
    // 验证码干扰线数  
    private int lineCount = 150;  
    // 验证码  
    private String code = null;  
    // 验证码图片Buffer  
    private BufferedImage buffImg=null;  
  
    private char[] codeSequence =  A, B, C, D, E, F, G, H, I, J,  
            K, L, M, N,  P, Q, R, S, T, U, V,  
            X, Y, Z,  1, 2, 3, 4, 5, 6, 7, 8, 9 ;  
  
    public  ValidateCode()   
        this.createCode();  
      
  
    /** 
     *  
     * @param width 图片宽 
     * @param height 图片高 
     */  
    public  ValidateCode(int width,int height)   
        this.width=width;  
        this.height=height;  
        this.createCode();  
      
    /** 
     *  
     * @param width 图片宽 
     * @param height 图片高 
     * @param codeCount 字符个数 
     * @param lineCount 干扰线条数 
     */  
    public  ValidateCode(int width,int height,int codeCount,int lineCount)   
        this.width=width;  
        this.height=height;  
        this.codeCount=codeCount;  
        this.lineCount=lineCount;  
        this.createCode();  
      
      
    public void createCode()   
        int x = 0,fontHeight=0,codeY=0;  
        int red = 0, green = 0, blue = 0;  
          
        x = width / (codeCount +2);//每个字符的宽度  
        fontHeight = height - 2;//字体的高度  
        codeY = height - 4;  
          
        // 图像buffer  
        buffImg = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);  
        Graphics2D g = buffImg.createGraphics();  
        // 生成随机数  
        Random random = new Random();  
        // 将图像填充为白色  
        g.setColor(Color.WHITE);  
        g.fillRect(0, 0, width, height);  
        // 创建字体  
        ImgFontByte imgFont=new ImgFontByte();  
        Font font =imgFont.getFont(fontHeight);  
        g.setFont(font);  
          
//        for (int i = 0; i < lineCount; i++)   
//            int xs = random.nextInt(width);  
//            int ys = random.nextInt(height);  
//            int xe = xs+random.nextInt(width/8);  
//            int ye = ys+random.nextInt(height/8);  
//            red = random.nextInt(255);  
//            green = random.nextInt(255);  
//            blue = random.nextInt(255);  
//            g.setColor(new Color(red, green, blue));  
//            g.drawLine(xs, ys, xe, ye);  
//          
          
        // randomCode记录随机产生的验证码  
        StringBuffer randomCode = new StringBuffer();  
        // 随机产生codeCount个字符的验证码。  
        for (int i = 0; i < codeCount; i++)   
            String strRand = String.valueOf(codeSequence[random.nextInt(codeSequence.length)]);  
            // 产生随机的颜色值，让输出的每个字符的颜色值都将不同。  
            g.setColor(Color.BLUE);  
            g.drawString(strRand, (i + 1) * x, codeY);  
            // 将产生的四个随机数组合在一起。  
            randomCode.append(strRand);  
          
        // 将四位数字的验证码保存到Session中。  
        code=randomCode.toString();       
      
      
    public void write(String path) throws IOException   
        OutputStream sos = new FileOutputStream(path);  
            this.write(sos);  
      
      
    public void write(OutputStream sos) throws IOException   
            ImageIO.write(buffImg, "png", sos);  
            sos.close();  
      
    public BufferedImage getBuffImg()   
        return buffImg;  
      
      
    public String getCode()   
        return code;  
    

测试

@Test
  public void validate() 
    ValidateCode vCode = new ValidateCode(120, 40, 4, 0);
    System.err.println(vCode.getCode());