1 package projectUtil;
2
3 /**
4 * @author tian
5 * @date 2019/4/1015:58
6 */
7
8 import javax.imageio.ImageIO;
9 import java.awt.*;
10 import java.awt.geom.GeneralPath;
11 import java.awt.image.BufferedImage;
12 import java.io.FileOutputStream;
13 import java.io.IOException;
14 import java.io.OutputStream;
15 import java.util.Random;
16
17 /**
18 * 验证码生成器
19 *
20 */
21 public class PicUtil {
22 // 图片的宽度。
23 private int width = 120;
24 // 图片的高度。
25 private int height = 40;
26 // 验证码字符个数
27 private int codeCount = 6;
28 // 验证码干扰线数
29 private int lineCount = 3;
30 // 验证码
31 private String code = null;
32 // 验证码图片Buffer
33 private BufferedImage buffImg = null;
34
35 private char[] codeSequence = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'M', 'N', 'P', 'Q', 'R',
36 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '2', '3', '4', '5', '6', '7', '8', '9' };
37 // 生成随机数
38 private Random random = new Random();
39
40 public PicUtil() {
41 this.createCode();
42 }
43
44 /**
45 *
46 * @param width 图片宽
47 * @param height 图片高
48 */
49 public PicUtil(int width, int height) {
50 this.width = width;
51 this.height = height;
52 this.createCode();
53 }
54
55 /**
56 *
57 * @param width 图片宽
58 * @param height 图片高
59 * @param codeCount 字符个数
60 * @param lineCount 干扰线条数
61 */
62 public PicUtil(int width, int height, int codeCount, int lineCount) {
63 this.width = width;
64 this.height = height;
65 this.codeCount = codeCount;
66 this.lineCount = lineCount;
67 this.createCode();
68 }
69
70 public void createCode() {
71 int codeX = 0;
72 int fontHeight = 0;
73 fontHeight = height - 5;// 字体的高度
74 codeX = width / (codeCount + 3);// 每个字符的宽度
75
76 // 图像buffer
77 buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
78 Graphics2D g = buffImg.createGraphics();
79
80 // 将图像填充为白色
81 g.setColor(Color.WHITE);
82 g.fillRect(0, 0, width, height);
83
84 // 创建字体
85 // ImgFontByte imgFont = new ImgFontByte();
86 Font font=new Font("宋体",Font.PLAIN,16);
87 g.setFont(font);
88
89 StringBuffer randomCode = new StringBuffer();
90 // 随机产生验证码字符
91 for (int i = 0; i < codeCount; i++) {
92 String strRand = String.valueOf(codeSequence[random.nextInt(codeSequence.length)]);
93 // 设置字体颜色
94 g.setColor(getRandomColor());
95 // 设置字体位置
96 g.drawString(strRand, (i + 1) * codeX, getRandomNumber(height / 2) + 20);
97 randomCode.append(strRand);
98 }
99 // 利用GeneralPath类来画曲线
100 GeneralPath gp = new GeneralPath();
101 gp.moveTo(0,0);
102
103
104 for (int i = 0; i < lineCount; i++) {
105 // 绘制一个圆弧（弧线）
106 // void drawArc(int x, int y, int width, int height, int startAngle, int arcAngle)
107 // 填充一个圆弧（扇形）
108 // void fillArc(int x, int y, int width, int height, int startAngle, int arcAngle)
109 // drawTanx(gp,g);
110 // drawCosx(gp,g);
111 drawSinx(gp,g);
112 drawSinxDX(gp,g);
113 // 设置字体颜色
114 g.setColor(getRandomColor());
115 // 绘制一个圆弧（弧线）
116 // g.drawArc(lineCount*getRandomNumber(10), lineCount*getRandomNumber(10), width, height,getRandomNumber(100),lineCount*getRandomNumber(100)%2==1?-lineCount*getRandomNumber(360):lineCount*getRandomNumber(1872));
117 }
118 code = randomCode.toString();
119 }
120
121 /** 获取随机颜色 */
122 private Color getRandomColor() {
123 int r = getRandomNumber(255);
124 int g = getRandomNumber(255);
125 int b = getRandomNumber(255);
126 return new Color(r, g, b);
127 }
128
129 /** 获取随机数 */
130 private int getRandomNumber(int number) {
131 return random.nextInt(number);
132 }
133
134 public void write(String path) throws IOException {
135 OutputStream sos = new FileOutputStream(path);
136 this.write(sos);
137 }
138
139 public void write(OutputStream sos) throws IOException {
140
141 ImageIO.write(buffImg, "png", sos);
142 sos.flush();
143 sos.close();
144 }
145
146 public BufferedImage getBuffImg() {
147 return buffImg;
148 }
149
150 public String getCode() {
151 return code;
152 }
153
154
155 public static void main(String[] args) throws IOException {
156 for (int i = 0; i <5 ; i++) {
157 new PicUtil(){{
158 this.write("D:/yy/"+super.code+".png");
159 }};
160 }
161
162 }
163
164 private void drawTanx(GeneralPath gp, Graphics2D g2d) {
165 for (double i = 0.000001; i <= 8*Math.PI; i+=0.0001*Math.PI) {
166 gp.lineTo(20*i, 100*-Math.tan(i));
167 }
168 g2d.draw(gp);
169
170 // 将当前画笔以原点为中心，旋转180度，画奇函数（关于原点对称）
171 g2d.rotate(Math.PI);
172 g2d.draw(gp);
173 }
174
175 private void drawCosx(GeneralPath gp, Graphics2D g2d) {
176 for (double i = 0.000001; i <= 8*Math.PI; i+=0.0001*Math.PI) {
177 gp.lineTo(20*i, 100*-Math.cos(i));
178 }
179 g2d.draw(gp);
180
181 // 将当前画笔以Y中为对称轴，画偶函数(关于Y轴对称)
182 g2d.scale(-1, 1);
183 g2d.draw(gp);
184 }
185 private void drawSinx(GeneralPath gp, Graphics2D g2d) {
186 for (double i = 0.000001; i <= 8*Math.PI; i+=0.0001*Math.PI) {
187 gp.lineTo(15*i, 100*-Math.sin(i));
188 }
189 g2d.draw(gp);
190 g2d.rotate(Math.PI*0.01*getRandomNumber(100));
191 g2d.draw(gp);
192 }
193
194 private void drawSinxDX(GeneralPath gp, Graphics2D g) {
195 for (double i = 0.1; i <= 8*Math.PI; i+=0.0001*Math.PI) {
196 gp.lineTo(20*i, -100*-Math.sin(i)/i);
197 }
198 g.draw(gp);
199 g.scale(-1, 1);
200 g.draw(gp);
201 }
202
203 }
网上有类似的代码，但独独只有生成的文字没有干扰线。所以花了点时间完善了一下，发上来，如果有需要请拿走。
