06
2022
09

HTML添加水印的方法

之前有个项目做完给用户演示的时候，界面上加了水印效果，今天把具体实现的方法分享一下。

首先看下效果：

loading=lazy class=medium-zoom-image style=margin: 0px; padding: 0px; border: none; max-width: 800px; height: auto; cursor: zoom-in; transition: transform 300ms cubic-bezier(0.2, 0, 0.2, 1) 0s !important;/></p><p style=margin: 10px auto; padding: 0px;>核心js代码（shuiyin.js）：</p><div class=cnblogs_code style=margin: 5px 0px; padding: 5px; background-color: rgb(245, 245, 245); border: 1px solid rgb(204, 204, 204); overflow: auto; color: rgb(0, 0, 0); font-family: "Courier New" !important; font-size: 12px !important;><div class=cnblogs_code_toolbar style=margin: 5px 0px 0px; padding: 0px;><span class=cnblogs_code_copy style=margin: 0px; padding: 0px 5px 0px 0px; font-family: "Courier New", serif; font-size: inherit; line-height: 1.5;><a title=复制代码 style=margin: 0px; padding: 0px; text-decoration-line: underline; border: none !important;><img src=https://common.cnblogs.com/images/copycode.gif alt=复制代码 style=margin: 0px; padding: 0px; max-width: 800px; height: auto; border: none !important;/></a></span></div>function watermark(settings) {    //默认设置    var defaultSettings = {        watermark_txt: "text",        watermark_x: 20, //水印起始位置x轴坐标        watermark_y: 20, //水印起始位置Y轴坐标        watermark_rows: 20, //水印行数        watermark_cols: 20, //水印列数        watermark_x_space: 100, //水印x轴间隔        watermark_y_space: 50, //水印y轴间隔        watermark_color: '#aaa', //水印字体颜色        watermark_alpha: 0.4, //水印透明度        watermark_fontsize: '15px', //水印字体大小        watermark_font: '微软雅黑', //水印字体        watermark_width: 210, //水印宽度        watermark_height: 80, //水印长度        watermark_angle: 20 //水印倾斜度数    };    if (arguments.length === 1 && typeof arguments[0] === "object") {        var src = arguments[0] || {};        for (key in src) {            if (src[key] && defaultSettings[key] && src[key] === defaultSettings[key]) continue;            else if (src[key]) defaultSettings[key] = src[key];        }    }    var oTemp = document.createDocumentFragment();    //获取页面最大宽度    var page_width = Math.max(document.body.scrollWidth, document.body.clientWidth);    var cutWidth = page_width * 0.0150;    var page_width = page_width - cutWidth;    //获取页面最大高度    var page_height = Math.max(document.body.scrollHeight, document.body.clientHeight) + 450;    page_height = Math.max(page_height, window.innerHeight - 30);    //如果将水印列数设置为0，或水印列数设置过大，超过页面最大宽度，则重新计算水印列数和水印x轴间隔    if (defaultSettings.watermark_cols == 0 || (parseInt(defaultSettings.watermark_x + defaultSettings.watermark_width * defaultSettings.watermark_cols + defaultSettings.watermark_x_space * (defaultSettings.watermark_cols - 1)) > page_width)) {        defaultSettings.watermark_cols = parseInt((page_width - defaultSettings.watermark_x + defaultSettings.watermark_x_space) / (defaultSettings.watermark_width + defaultSettings.watermark_x_space));        defaultSettings.watermark_x_space = parseInt((page_width - defaultSettings.watermark_x - defaultSettings.watermark_width * defaultSettings.watermark_cols) / (defaultSettings.watermark_cols - 1));    }    //如果将水印行数设置为0，或水印行数设置过大，超过页面最大长度，则重新计算水印行数和水印y轴间隔    if (defaultSettings.watermark_rows == 0 || (parseInt(defaultSettings.watermark_y + defaultSettings.watermark_height * defaultSettings.watermark_rows + defaultSettings.watermark_y_space * (defaultSettings.watermark_rows - 1)) > page_height)) {        defaultSettings.watermark_rows = parseInt((defaultSettings.watermark_y_space + page_height - defaultSettings.watermark_y) / (defaultSettings.watermark_height + defaultSettings.watermark_y_space));        defaultSettings.watermark_y_space = parseInt(((page_height - defaultSettings.watermark_y) - defaultSettings.watermark_height * defaultSettings.watermark_rows) / (defaultSettings.watermark_rows - 1));    }    var x;    var y;    for (var i = 0; i < defaultSettings.watermark_rows; i++) {        y = defaultSettings.watermark_y + (defaultSettings.watermark_y_space + defaultSettings.watermark_height) * i;        for (var j = 0; j < defaultSettings.watermark_cols; j++) {            x = defaultSettings.watermark_x + (defaultSettings.watermark_width + defaultSettings.watermark_x_space) * j;            var mask_div = document.createElement('div');            mask_div.id = 'mask_div' + i + j;            mask_div.className = 'mask_div';            mask_div.appendChild(document.createTextNode(defaultSettings.watermark_txt));            //设置水印div倾斜显示            mask_div.style.webkitTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";            mask_div.style.MozTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";            mask_div.style.msTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";            mask_div.style.OTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";            mask_div.style.transform = "rotate(-" + defaultSettings.watermark_angle + "deg)";            mask_div.style.visibility = "";            mask_div.style.position = "absolute";            mask_div.style.left = x + 'px';            mask_div.style.top = y + 'px';            mask_div.style.overflow = "hidden";            mask_div.style.zIndex = "9999";            //让水印不遮挡页面的点击事件            mask_div.style.pointerEvents = 'none';            mask_div.style.opacity = defaultSettings.watermark_alpha;            mask_div.style.fontSize = defaultSettings.watermark_fontsize;            mask_div.style.fontFamily = defaultSettings.watermark_font;            mask_div.style.color = defaultSettings.watermark_color;            mask_div.style.textAlign = "center";            mask_div.style.width = defaultSettings.watermark_width + 'px';            mask_div.style.height = defaultSettings.watermark_height + 'px';            mask_div.style.display = "block";            oTemp.appendChild(mask_div);        };    };    document.body.appendChild(oTemp); } function getNow() {    var d = new Date();    var year = d.getFullYear();    var month = change(d.getMonth() + 1);    var day = change(d.getDate());    var hour = change(d.getHours());    var minute = change(d.getMinutes());    var second = change(d.getSeconds());    function change(t) {        if (t < 10) {            return "0" + t;        } else {            return t;        }    }    var time = year + '年' + month + '月' + day + '日 ' + hour + '时' + minute + '分' + second + '秒';    return time; }</div><p style=margin: 10px auto; padding: 0px;><strong style=margin: 0px; padding: 0px;>调用方法</strong>：</p><p style=margin: 10px auto; padding: 0px;> 在html中引入jquery.js，shuiyin.js，然后使用以下代码调用：</p><div class=cnblogs_code style=margin: 5px 0px; padding: 5px; background-color: rgb(245, 245, 245); border: 1px solid rgb(204, 204, 204); overflow: auto; color: rgb(0, 0, 0); font-family: "Courier New" !important; font-size: 12px !important;><pre style=margin-top: 0px; margin-bottom: 0px; padding: 0px; transition-duration: 0.2s; transition-property: background-color, border-color, border-radius, padding-top, padding-bottom, margin-top, margin-bottom, color, opacity; overflow: auto; font-family: "Courier New", serif; overflow-wrap: break-word; white-space: pre-wrap;><script>watermark({ "watermark_txt": "水印文字内容"}); </script></pre></div><p style=margin: 10px auto; padding: 0px;>本文最开始预览效果的调用方式如下（不包含html部分，html无要求）：</p><div class=cnblogs_code style=margin: 5px 0px; padding: 5px; background-color: rgb(245, 245, 245); border: 1px solid rgb(204, 204, 204); overflow: auto; color: rgb(0, 0, 0); font-family: "Courier New" !important; font-size: 12px !important;><pre style=margin-top: 0px; margin-bottom: 0px; padding: 0px; transition-duration: 0.2s; transition-property: background-color, border-color, border-radius, padding-top, padding-bottom, margin-top, margin-bottom, color, opacity; overflow: auto; font-family: "Courier New", serif; overflow-wrap: break-word; white-space: pre-wrap;><script>1 var now = getNow();2 watermark({ "watermark_txt": "样稿" + now }); </script></pre></div></div><div id=MySignature role=contentinfo style=margin: 0px; padding: 0px; color: rgb(125, 139, 141); font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);>*********************************** 转载自https://www.cnblogs.com/bosins/p/15094168.html ***********************************</div><p><br/></p> </div> <div class=

作者:xiaodai | 分类:电脑世界 | 浏览:114 | 评论:0
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