package top.lileix.test;
import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Transparency;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@EnableAutoConfiguration
public class App {
@RequestMapping("/")
@ResponseBody
void home(HttpServletResponse response, String s) {
int width = 55;
int height = 55;
int fontHeight = 55 / s.length()-3;
String drawStr = s;
BufferedImage buffImg = new BufferedImage(55, 55, BufferedImage.TYPE_INT_RGB);
Graphics2D gd = buffImg.createGraphics();
// 设置透明 start
buffImg = gd.getDeviceConfiguration().createCompatibleImage(width, height, Transparency.TRANSLUCENT);
gd = buffImg.createGraphics();
// 设置透明 end
// 画圆
gd.setColor(Color.GRAY); // 设置颜色
gd.fillOval(0, 0, 54, 54);
gd.setFont(new Font("微软雅黑", Font.PLAIN, fontHeight)); // 设置字体
gd.setColor(Color.white); // 设置颜色
gd.drawString(drawStr, width / 2 - fontHeight * drawStr.length() / 2, (fontHeight + height) / 2-2); // 输出文字（中文横向居中）
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
response.setContentType("image/jpeg");
ServletOutputStream sos = null;
try {
sos = response.getOutputStream();
ImageIO.write(buffImg, "png", sos);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (sos != null) {
try {
sos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
public static void main(String[] args) throws Exception {
SpringApplication.run(App.class, args);
}
}
springboot
