jquery库：

jquery -1.10.2.min.js，jQuery UI - v1.12.1。

jQuery 代码

不多说了，之间上代码。不懂的地方看注释。

<script type="text/javascript"> //鼠标按下时的X Y坐标 var mouseDownX; var mouseDownY; //鼠标按下时移动的X Y 坐标 var mouseMoveX; var mouseMoveY; //移动的状态 var isMove = false; function init() { $("#selected").css("display", "none"); $("#selected").css("top", "0"); $("#selected").css("left", "0"); $("#selected").css("width", "0"); $("#selected").css("height", "0"); } $(document).ready(function() { init(); var selectedTD = new Array();//创建被选中表格数组 var TD = $("td");//获取所有表格信息 for ( var i = 0; i < TD.length; i++) { selectedTD.push(TD[i]); } $("#tableDiv").mousedown(function(event) { mouseDownX = event.clientX - $(this).offset().left;; mouseDownY = event.clientY - $(this).offset().top; console.log("mouseDownX=" + mouseDownX +" mouseDownY=" + mouseDownY ); if(event.target.id.match(/selected/)) { isMove = true; } //鼠标按下并移动时进行判断（拖拽 or 画框） $("#tableDiv").mousemove(function(event) { mouseMoveX = event.clientX - $(this).offset().left; mouseMoveY = event.clientY - $(this).offset().top; var selectDiv = document.getElementById("selected"); if (isMove) { //拖拽的代码，因为实在不想算 xy 了，所以使用了jquery ui $("#selected").draggable(); //这部分是负责画框的时候，实时把框住的表格变色的，（代码和下面的代码重复了） var left = selectDiv.offsetLeft, top = selectDiv.offsetTop; width = selectDiv.offsetWidth, height = selectDiv.offsetHeight; for ( var i = 0; i < selectedTD.length; i++) { var sl = selectedTD[i].offsetWidth + selectedTD[i].offsetLeft; var st = selectedTD[i].offsetHeight + selectedTD[i].offsetTop; if (sl > left && st > top && selectedTD[i].offsetLeft < left + width && selectedTD[i].offsetTop < top + height) { if (selectedTD[i].className.indexOf("selected") == -1) { selectedTD[i].className = "selected"; } } else { if (selectedTD[i].className.indexOf("selected") != -1) { selectedTD[i].className = "TD"; } } } } else { //重复的代码，完了再把它抽取出来 var left = selectDiv.offsetLeft, top = selectDiv.offsetTop; width = selectDiv.offsetWidth, height = selectDiv.offsetHeight; for ( var i = 0; i < selectedTD.length; i++) { var sl = selectedTD[i].offsetWidth + selectedTD[i].offsetLeft; var st = selectedTD[i].offsetHeight + selectedTD[i].offsetTop; if (sl > left && st > top && selectedTD[i].offsetLeft < left + width && selectedTD[i].offsetTop < top + height) { if (selectedTD[i].className.indexOf("selected") == -1) { selectedTD[i].className = "selected"; } } else { if (selectedTD[i].className.indexOf("selected") != -1) { selectedTD[i].className = "TD"; } } } //鼠标抬起结束画框，和拖动 $("#tableDiv").mouseup(function() { console.log("mouseUpX=" + mouseMoveX + " mouseUpY=" + mouseMoveX); isMove = false; $(this).unbind('mousemove'); }) //画框 displaySelected(mouseDownY, mouseDownX, mouseMoveX, mouseMoveY); } }) }) //当鼠标在已经画好的框上时，改变鼠标指针样式，就是十字形了 $("#selected").mouseenter(function() { $("#selected").css("cursor", "move"); }); }); function displaySelected(mouseDownY, mouseDownX, mouseUpX, mouseUpY) { $("#selected").css("display", "block"); $("#selected").css("top", mouseDownY); $("#selected").css("left", mouseDownX); var moveX = mouseMoveX - mouseDownX; var moveY = mouseMoveY - mouseDownY; if (moveY < 0) { $("#selected").css("top", event.clientY - $("#table").offset().top); } if (moveX < 0) { $("#selected").css("left", event.clientX - $("#table").offset().left); } $("#selected").css("width", Math.abs(moveX)); $("#selected").css("height", Math.abs(moveY)); } </script>

测试用的html

使用table进行的测试：

<div id="tableDiv" style="width: 1500px; height: 1500px;top: 100px; left:100px; position: absolute;"> <div id="selected" style="border:5px dotted rgb(239, 37, 17);position: absolute;display: none;"></div> <table border="1" style=" width: 1500px; height: 1500px;" id="table"> <tr> <td id="1" class="TD"></td> <td id="2" class="TD"></td> <td id="3" class="TD"></td> <td id="4" class="TD"></td> <td id="5" class="TD"></td> <td id="6" class="TD"></td> </tr> <tr> <td id="7" class="TD"></td> <td id="8" class="TD"></td> <td id="9" class="TD"></td> <td id="10" class="TD"></td> <td id="11" class="TD"></td> <td id="12" class="TD"></td> </tr> <tr> <td id="1" class="TD"></td> <td id="2" class="TD"></td> <td id="3" class="TD"></td> <td id="4" class="TD"></td> <td id="5" class="TD"></td> <td id="6" class="TD"></td> </tr> </table> <!--表格代码太多所以...--> </div>

效果图

以上所述是小编给大家介绍的jQuery 实现鼠标画框并对框内数据选中的实例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！