新增水印配置类

smart-admin-api/sa-admin/src/main/java/net/lab1024/sa/admin/util/excel/Watermark.java

@@ -0,0 +1,95 @@
+package net.lab1024.sa.admin.util.excel;
+
+import cn.dev33.satoken.stp.StpUtil;
+import cn.hutool.core.date.DateUtil;
+import lombok.Data;
+
+import javax.swing.*;
+import java.awt.*;
+import java.util.Date;
+
+
+/**
+ * @author liuzhexian
+ * @since 2024-04-16
+ * @email 1037512352@qq.com
+ */
+@Data
+public class Watermark {
+
+    public Watermark(String content) {
+        this.content = content;
+        init();
+    }
+
+    public Watermark(String content, Color color, Font font, double angle) {
+        this.content = content;
+        this.color = color;
+        this.font = font;
+        this.angle = angle;
+        init();
+    }
+
+    /**
+     * 根据水印内容长度自适应水印图片大小，简单的三角函数
+     */
+    private void init() {
+        FontMetrics fontMetrics = new JLabel().getFontMetrics(this.font);
+        int stringWidth = fontMetrics.stringWidth(this.content);
+        int charWidth = fontMetrics.charWidth('A');
+        this.width = (int) Math.abs(stringWidth * Math.cos(Math.toRadians(this.angle))) + 2 * charWidth;
+        this.height = (int) Math.abs(stringWidth * Math.sin(Math.toRadians(this.angle))) + 2 * charWidth;
+        this.yAxis = this.height;
+        this.xAxis = charWidth;
+    }
+
+    /**
+     * 水印内容
+     */
+    private String content;
+
+    /**
+     * 画笔颜色
+     */
+    private Color color = new Color(239,239,239);
+
+    /**
+     * 字体样式
+     */
+    private Font font = new Font("Microsoft YaHei", Font.BOLD, 15);
+
+    /**
+     * 水印宽度
+     */
+    private int width;
+
+    /**
+     * 水印高度
+     */
+    private int height;
+
+    /**
+     * 倾斜角度，非弧度制
+     */
+    private double angle = 25;
+
+    /**
+     * 字体的y轴位置
+     */
+    private int yAxis = 50;
+
+    /**
+     * 字体的X轴位置
+     */
+    private int xAxis;
+
+    /**
+     * 水平倾斜度
+     */
+    private double shearX = 0.1;
+
+    /**
+     * 垂直倾斜度
+     */
+    private double shearY = -0.26;
+}