**
## 生成验证码
**
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;
import java.util.concurrent.TimeUnit;
/*
* 验证码生成
* */
@RestController
@RequestMapping("/api")
@Slf4j
public class SecurityCodeController {
@Autowired
RedisTemplate redisTemplate;
@RequestMapping("/getClCode")
public void getCode(HttpServletRequest request, HttpServletResponse response, String codes) throws IOException {
int width = 100;
int height = 40;
//1.创建一对象,在内存中代表图片(验证码图片对象)
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
//2.美化图片
//2.1 填充背景色
Graphics g = image.getGraphics();//画笔对象
g.setColor(Color.white);//设置画笔颜色
g.fillRect(0, 0, width, height);
//2.2画边框
// g.setColor(Color.PINK);
g.drawRect(0, 0, width - 1, height - 1);
// String str = "abcdefghigklmnopqrstuvwxyz0123456789";
String str = "0123456789";
//生成随机角标`
Random ran = new Random();
g.setColor(Color.black);
Font font = new Font("宋体",Font.BOLD,27);
g.setFont(font);
// for (int i = 1; i <= 4; i++) {
// int index = ran.nextInt(str.length());
// //获取字符
// char ch = str.charAt(index);//随机字符
// //2.3写验证码
// code += ch;
// g.drawString(ch + "", width / 5 * i, 30 );
// }
int i1 = new Random().nextInt(10);
int i2 = new Random().nextInt(10);
String a = i1 + "+" + i2 + "=";
g.drawString(a , width / 5 , 30 );
log.info(i1+i2+"----------------"+codes+"----------------"+a);
//加入到redis 需要参数codes
if (codes!=null) {
redisTemplate.opsForValue().set(codes, i1 + i2 + "", 1, TimeUnit.MINUTES);
}
//2.4画干扰线
g.setColor(Color.GREEN);
//随机生成坐标点
for (int i = 0; i < 10; i++) {
int x1 = ran.nextInt(width);
int x2 = ran.nextInt(width);
int y1 = ran.nextInt(height);
int y2 = ran.nextInt(height);
g.drawLine(x1, y1, x2, y2);
}
//3.将图片输出到页面展示
ImageIO.write(image, "jpg", response.getOutputStream());
}
}
生成验证码
于 2022-09-07 15:57:44 首次发布