[Java知识库]Java验证码图片生成实现

背景:今天生成的验证码图片遭嫌弃了，反馈说后端生成的验证码不好看，emmm，外貌协会。好吧，那我就修改一下，把灰色风格换成花里胡哨的彩色。

原来的验证码：

现在的验证码：

实现：生成验证码可以用这个Java库，引入坐标即可

<!-- 验证码 -->
<dependency>
    <groupId>com.github.penggle</groupId>
    <artifactId>kaptcha</artifactId>
    <exclusions>
        <exclusion>
            <artifactId>javax.servlet-api</artifactId>
            <groupId>javax.servlet</groupId>
        </exclusion>
    </exclusions>
</dependency>

注入：控制层注入验证码生产者

@Resource(name = "captchaProducer")
private Producer captchaProducer;

改造后的实现代码：

BufferedImage image = new BufferedImage(100,50,BufferedImage.TYPE_INT_RGB);

String code = captchaProducer.createText();
System.out.println(code);
Graphics graphics =image.getGraphics();
char[] cs = code.toCharArray();
graphics.fillRect(0,0, 100, 50);

for(int i=0;i<=3;i++)
{
    graphics.setColor(new Color(random.nextInt(256),random.nextInt(256),random.nextInt(256)));
    graphics.setFont(new Font("微软雅黑",Font.BOLD,30));
    char c=cs[i];
    graphics.drawString(" "+c, i*25, 30);
}
int max=random.nextInt(15);
for(int i=0;i<max;i++)
{
    graphics.setColor(new Color(random.nextInt(256),random.nextInt(256),random.nextInt(256)));
    graphics.drawLine(random.nextInt(100),random.nextInt(50), random.nextInt(100), random.nextInt(50));
}
int max2=random.nextInt(15);
for(int i=0;i<max2;i++)
{
    graphics.setColor(new Color(random.nextInt(256),random.nextInt(256),random.nextInt(256)));
    graphics.drawOval(random.nextInt(80), random.nextInt(40), random.nextInt(5), random.nextInt(10));
}