• js实现在当前页面搜索高亮显示字的方法


    在html页面上,有时候会遇到一些检索高亮显示的问题,具体用js是实现的方式,代码展示。

    Jsp页面设置方式

    <li class="pull-left" id="search_box">
        <input type="text"  id="searchstr" name="searchstr"   placeholder="请输入要查找的内容">
     <%--   <input class="textbox" id="searchstr" type="text" size="10" name="searchstr" /> --%>
       <%-- <input class="sbttn" id="search_btn" type="button" value="页内查找" />--%>
       
    <button   id="search_btn" type="button" >搜索</button></li>

    CSS样式控制

      <link rel="stylesheet" type="text/css" href="../css/main.css" />
    <style type="text/css">
        .demo{width:800px; margin:40px auto 0 auto; min-height:250px; font-size:14px}
        .demo p{line-height:22px}
        .demo p strong{color:#f30}
        .highlight { background: yellow;  }
        .prelight { background: blue; color: white; }
        #tip { background: #FFFFCC; border: 1px solid #999; width: 200px; text-align: center; display: none; font-size: 12px; }
        #search_box text-align:right }
        #search_btn { background-color:#0a64ad; border: 0px; color: white;margin-left:-5px; }
        #searchstr { font-size: 14px; height: 30px; }
    </style>

    js实现

     <script type="text/javascript" src="../js/jquery.js"></script>
        <script type="text/javascript">
            (function($) {
                $.fn.fixDiv = function(options) {
                    var defaultVal = {
                        top: 10
                    };
                    var obj = $.extend(defaultVal, options);
                    $this = this;
                    var _top = $this.offset().top;
                    var _left = $this.offset().left;
                    $(window).scroll(function() {
                        var _currentTop = $this.offset().top;
                        var _scrollTop = $(document).scrollTop();
                        if (_scrollTop > _top) {
                            $this.offset({
                                top: _scrollTop + obj.top,
                                left: _left
                            });
                        } else {
                            $this.offset({
                                top: _top,
                                left: _left
                            });
                        }
                    });
                    return $this;
                };
            })(jQuery);
            $(function(){
                $("#search_box").fixDiv({ top: 0 });
                $('#search_btn').click(highlight);//点击search时,执行highlight函数;
               
    $('#searchstr').keydown(function (e) {
                    var key = e.which;
                    if (key == 13) highlight();
                })

                var i = 0;
                var sCurText;
                function highlight(){
                    clearSelection();//先清空一下上次高亮显示的内容;

                   
    var flag = 0;
                    var bStart = true;


                    $('#tip').text('');
                    $('#tip').hide();
                    var searchText = $('#searchstr').val();
                    var _searchTop = $('#searchstr').offset().top+30;
                    var _searchLeft = $('#searchstr').offset().left;
                    if($.trim(searchText)=="" || $.trim(searchText)=='.'){
                        //alert(123);
                       
    showTips("请输入查找内容",_searchTop,3,_searchLeft);
                        return;
                    }


                    var searchText = $('#searchstr').val();//获取你输入的关键字;
                   
    var regExp = new RegExp(searchText, 'g');//创建正则表达式,g表示全局的,如果不用g,则查找到第一个就不会继续向下查找了;
                   
    var content = $("#lawcontent").text();
                    if (!regExp.test(content)) {
                        showTips("没有找到要查找的内容",_searchTop,3,_searchLeft);
                        return;
                    } else {
                        if (sCurText != searchText) {
                            i = 0;
                            sCurText = searchText;
                        }
                    }

                    $('p').each(function(){
                        var html = $(this).html();
                        var newHtml = html.replace(regExp, '<span class="highlight">'+searchText+'</span>');//将找到的关键字替换,加上highlight属性;

                       
    $(this).html(newHtml);//更新;
                       
    flag = 1;
                    });

                    if (flag == 1) {
                        if ($(".highlight").size() > 1) {
                            var _top = $(".highlight").eq(i).offset().top+$(".highlight").eq(i).height();
                            var _tip = $(".highlight").eq(i).parent().find("strong").text();
                            if(_tip=="") _tip = $(".highlight").eq(i).parent().parent().find("strong").text();
                            var _left = $(".highlight").eq(i).offset().left;
                            var _tipWidth = $("#tip").width();
                            if (_left > $(document).width() - _tipWidth) {
                                _left = _left - _tipWidth;
                            }
                            $("#tip").html(_tip).show();
                            $("#tip").offset({ top: _top, left: _left });
                            $("#search_btn").val("查找下一个");
                        }else{
                            var _top = $(".highlight").offset().top+$(".highlight").height();
                            var _tip = $(".highlight").parent().find("strong").text();
                            var _left = $(".highlight").offset().left;
                            $('#tip').show();
                            $("#tip").html(_tip).offset({ top: _top, left: _left });
                        }
                        $("html, body").animate({ scrollTop: _top - 50 });
                        i++;
                        if (i > $(".highlight").size() - 1) {
                            i = 0;
                        }
                    }
                }
                function clearSelection(){
                    $('p').each(function(){
                        //找到所有highlight属性的元素;
                       
    $(this).find('.highlight').each(function(){
                            $(this).replaceWith($(this).html());//将他们的属性去掉;
                       
    });
                    });
                }

                //mask
               
    var tipsDiv = '<div class="tipsClass"></div>';
                $( 'body' ).append( tipsDiv );
                function showTips( tips, height, time,left ){
                    var windowWidth = document.documentElement.clientWidth;
                    $('.tipsClass').text(tips);
                    $( 'div.tipsClass' ).css({
                        'top' : height + 'px',
                        'left' :left + 'px',
                        'position' : 'absolute',
                        'padding' : '8px 6px',
                        'background': '#000000',
                        'font-size' : 14 + 'px',
                        'font-weight': 900,
                        'margin' : '0 auto',
                        'text-align': 'center',
                        'width' : 'auto',
                        'color' : '#fff',
                        'border-radius':'2px',
                        'opacity' : '0.8' ,
                        'box-shadow':'0px 0px 10px #000',
                        '-moz-box-shadow':'0px 0px 10px #000',
                        '-webkit-box-shadow':'0px 0px 10px #000'
                   
    }).show();
                    setTimeout( function(){$( 'div.tipsClass' ).fadeOut();}, ( time * 1000 ) );
                }
            })
            /**/
       
    </script>

     

     

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  • 原文地址:https://www.cnblogs.com/liushuaibiao/p/9405433.html
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