WordPress博客网站给网页添加全屏水印教程 附代码

很多时候有些网站需要防止被盗用，或是一些信息标注，需要开启防盗防水印，下边代码直接复制到通用js中，或如果后台有自定义JS代码的地方 直接加进去即可。

<script>
$(document).ready(function() {
    var watermark_txt = "凡客源码网" + getDate();
    watermark({"watermarl_element":"watermark-wrapper", "watermark_txt":watermark_txt});
});

function watermark(settings) {
    //默认设置 - 调整了颜色和透明度使水印加深
    var defaultSettings={
        watermarl_element:"body",
        watermark_txt:"",
        watermark_x:10,//水印起始位置x轴坐标
        watermark_y:10,//水印起始位置Y轴坐标
        watermark_rows:2000,//水印行数
        watermark_cols:2000,//水印列数
        watermark_x_space:50,//水印x轴间隔
        watermark_y_space:50,//水印y轴间隔
        watermark_color:'#a0a0a0',// 加深后的水印颜色
        watermark_alpha:0.5,// 提高透明度使水印更明显
        watermark_fontsize:'15px',//水印字体大小
        watermark_font:'思源黑体',//水印字体
        watermark_width:500,//水印宽度
        watermark_height:50,//水印长度
        watermark_angle:15//水印倾斜度数
    };
    
    //采用配置项替换默认值，作用类似jquery.extend
    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();
    var maskElement=document.getElementById(defaultSettings.watermarl_element) || document.body;
    //获取页面最大宽度
    var page_width = Math.max(maskElement.scrollWidth,maskElement.clientWidth);
    //获取页面最大高度
    var page_height = Math.max(maskElement.scrollHeight,maskElement.clientHeight,maskElement.scrollTop);
    //水印数量自适应元素区域尺寸
    defaultSettings.watermark_cols=Math.ceil(page_width/(defaultSettings.watermark_x_space+defaultSettings.watermark_width));
    defaultSettings.watermark_rows=Math.ceil(page_height/(defaultSettings.watermark_y_space+defaultSettings.watermark_height));
    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.innerHTML = 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 = "1029";
            mask_div.style.pointerEvents = 'none';
            mask_div.style.filter = "alpha(opacity=" + (defaultSettings.watermark_alpha * 100) + ")"; // 对应透明度的IE设置
            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);
        }
    }
    
    maskElement.appendChild(oTemp);
}

// 修复后的日期格式化函数
function getDate() {
    var d = new Date();
    // 使用更简洁的方式处理数字补零
    function pad(n) {
        return n < 10 ? '0' + n : n;
    }
    
    var year = d.getFullYear();
    var month = pad(d.getMonth() + 1); // 月份修正并补零
    var day = pad(d.getDate());
    var hour = pad(d.getHours());
    var minute = pad(d.getMinutes());
    var second = pad(d.getSeconds());
    
    return year + "-" + month + "-" + day + " " + hour + ":" + minute + ":" + second;
}
</script>