2020年10月记录

最新推荐文章于 2024-06-19 09:30:17 发布

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最新推荐文章于 2024-06-19 09:30:17 发布

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本文链接：https://blog.youkuaiyun.com/yaoct/article/details/109286371

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1.springboot 消息头设置要写在消息体传输之前。可能和http报文先后顺序有关。

2.java画图常用api。

    public static String ImageBuilder(String code,String path) {
        //得到图片缓冲区
        FileInputStream fileInputStream = null;
        try {
            BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            File file = new File(path);
            if(!file.exists()){
                throw  new RuntimeException("二维码存放地址有误");
            }
            fileInputStream = new FileInputStream(file);
            BufferedImage image2 = ImageIO.read(fileInputStream);
            //得到它的绘制环境(这张图片的笔)
            Graphics2D g2 = (Graphics2D) bi.getGraphics();
            g2.fillRect(0, 0, width, height);
            //设置颜色
            g2.setColor(Color.WHITE);
            // 将图片大小设置为大约4cm*4cm 具体根据纸张大小设定
            g2.drawImage(image2, 10, 85, 135, 135,null);
            g2.drawRect(0, 0, width - 1, height - 1);
            //设置字体:字体、字号、大小
            g2.setFont(new Font("黑体", Font.BOLD, 26));
            //设置背景颜色
            g2.setColor(Color.BLACK);
            //向图片上写字符串
            g2.drawString("东久", 15, 30);
            g2.setFont(new Font("黑体", Font.BOLD, 20));
            g2.drawString("·", 65, 28);
            g2.setFont(new Font("黑体", Font.BOLD, 26));
            g2.drawString("佳能", 83, 30);
            g2.setFont(new Font("黑体", Font.BOLD, 18));
            g2.drawString("iR-ADV C3525", 15, 60);
            g2.setFont(new Font("黑体", Font.ITALIC, 14));
            g2.drawString(code, 30, 80);
            // 图片上传后的路径
            String savePath = "F:/a.png";
            ImageIO.write(bi, "JPEG", new FileOutputStream(savePath));
            return savePath;
        }catch (Exception e){
            log.error("生成图片错误",e);
            throw new RuntimeException("生成图片错误",e);
        }finally {
            if(fileInputStream != null){
                try {
                    fileInputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

3.切面匹配表达式。

https://www.cnblogs.com/songshuiyang/p/7857515.html

4.springboot aop。

https://www.cnblogs.com/huanzi-qch/p/9916478.html

5.获取注解的属性值

https://blog.youkuaiyun.com/HaHa_Sir/article/details/81331437

6.swagger @ApiModel(value = "账号更改密码信息")的value不能一样

否则显示再页面的json示例也一样

7.启动XxlJobAdminApplication，XxlJobExecutorApplication ，在http://localhost:8080/xxl-job-admin配置执行器，执行任务。

8.navicate连接oracle报错

https://www.cnblogs.com/bingdaocaihong/p/10268861.html

9.oracle不加引号转换成大写