简单的ajax封装

- 日理万妓 2022-04-11 07:11 444阅读 0赞

// ajax发送post请求返回 json 数据  
function requestJSON(params) \{  
params.dataType = 'json';  
sendPost(params);  
\}  
  
// ajax发送post请求返回 string字符串  
function requestString(params) \{  
params.dataType = 'text';  
sendPost(params);  
\}  
  
// ajax发送post请求  
function sendPost(params) \{  
params.type = 'post';  
sendRequest(params);  
\}  
  
// ajax发送get请求  
function request(params) \{  
params.type = 'get';  
sendRequest(params);  
\}  
  
// ajax请求封装  
function sendRequest(params) \{  
params = $.extend(\{\}, \{ async: true \}, params);  
$.ajax(\{  
url: params.url,  
data: params.data,  
type: params.type,  
dataType: params.dataType,  
success: params.success,  
async: params.async,  
beforeSend: function () \{  
if (typeof (params.before) == 'function') \{  
params.before();  
\}  
else \{  
// 页面数据请求提示loading效果  
jQuery('body').Loading(\{ marginTop: '-300px;' \});  
\}  
\},  
error: function () \{  
jQuery('body').hideLoading();  
if (typeof (params.error) == 'function') params.error();  
\},  
complete: function () \{  
  
if (typeof (params.complete) == 'function') \{  
params.complete();  
\}  
else \{  
// 请求完成处理  
jQuery('body').hideLoading();  
\}  
\}  
\});  
\}  
  
  
\---------------------------------@发布---------------------------//  
function textChange(options) \{  
var opt = $.extend(\{  
Content: ''  
\}, options);  
var objId = opt.Content;  
var obj = $("\#" + objId);  
obj.keydown(function (evt) \{  
var k = window.event ? evt.keyCode : evt.which;  
var isChrome = window.navigator.userAgent.indexOf("Chrome") !== -1;  
if (isChrome&&k==16) \{  
k=50;  
\}  
//为@键值时  
//这里监听输入框的keyup事件  
//不为空 && 不为上箭头或下箭头或回车  
if (k == 50 && evt.shiftKey) \{  
buildTip(obj, '');  
\}  
else if (k == 13 || k == 38 || k == 40) \{ //回车  
if ($('\#searchresult ul').length > 0) \{  
if (k == 38) \{ //上箭头  
$('\#searchresult a.searchHover').parent().prev().find("a").addClass("searchHover");  
$('\#searchresult a.searchHover').parent().next().find("a").removeClass("searchHover");  
\} else if (k == 40) \{ //下箭头  
$('\#searchresult a.searchHover').parent().next().find("a").addClass("searchHover");  
$('\#searchresult a.searchHover').parent().prev().find("a").removeClass("searchHover");  
\} else if (k == 13) \{ //回车  
var selContent = $('\#searchresult a.searchHover').attr('rname');  
if (selContent == "" || selContent == undefined) return;  
var content = selContent + ' ';  
  
//移除textarea里面@后面多余数据  
var pointIndex = getPositionForTextArea(obj\[0\]);  
var searchName = "";  
var atIndex = obj.val().substring(0, pointIndex).lastIndexOf("@", atIndex);  
obj.val(obj.val().substring(0, atIndex + 1) + obj.val().substring(pointIndex));  
  
var newIndex = getPositionForTextArea(obj\[0\]);  
setCursorPosition(obj\[0\], newIndex - (newIndex - atIndex - 1));  
  
resetPostion(content, obj);  
$("\#searchresult").remove();  
\}  
evt.returnValue = false;  
return false;  
\}  
\}  
else \{  
//$("\#searchresult").remove();  
\}  
\});  
  
obj.keyup(function (evt) \{  
var k = window.event ? evt.keyCode : evt.which;  
if (k != 13 && k != 38 && k != 40) \{  
if ($('\#searchresult ul').length > 0) \{  
var pointIndex = getPositionForTextArea(obj\[0\]);  
var searchName = "";  
var atIndex = obj.val().substring(0,pointIndex).lastIndexOf("@", atIndex);  
searchName = obj.val().substring(atIndex + 1, pointIndex);  
buildTip(obj, searchName);  
\}  
\}  
\});  
\}  
  
//构建提示信息  
function buildTip(obj, serachname) \{  
$.ajax(\{  
type: 'post',  
url: '',  
data: '',  
dataType: 'json',  
success: function (data) \{  
var objData = data.list;  
if (objData.length > 0) \{  
if ($("\#searchresult").length > 0)  
$("\#searchresult").remove();  
var layer = "";  
layer = "<div id='searchresult'><ul>";  
$.each(objData, function (idx, item) \{  
layer += "<li><a href='javascript:void(0);' ></a></li>";  
\});  
layer += "</ul></div>";  
  
//将结果添加到div中  
obj.after($(layer));  
$("\#searchresult a:first").addClass("searchHover");  
$("\#searchresult").css("display", "");  
  
//鼠标点击事件  
$("\#searchresult a").click(function () \{  
var content = $(this).attr('rname') + ' ';  
resetPostion(content, obj);  
$("\#searchresult").empty();  
$("\#searchresult").css("display", "none");  
\});  
  
$("\#searchresult a").each(function () \{  
$(this).mouseover(function (e) \{  
$("\#searchresult a").removeClass("searchHover");  
$(this).addClass("searchHover");  
\});  
\});  
  
//evt.stopPropagation();  
  
//处理js事件冒泡问题  
$('body').bind("click", function (e) \{  
$("\#searchresult").remove();  
e.stopPropagation();  
\});  
$("\#searchresult").bind("click", function (e) \{  
e.stopPropagation();  
\});  
  
\} else \{  
$("\#searchresult").remove();  
\}  
\}  
\});  
\}  
  
var cpos = 0;  
function resetPostion(content, target) \{  
var tc = target\[0\];  
  
if (document.selection) \{//ie  
target.bind("click keyup", function (e) \{//点击或键盘动作时设置光标值  
e.stopPropagation();  
cpos = getPositionForTextArea(tc);  
\});  
\}  
var tclen = target.val().length;  
var pos = 0;  
if (typeof document.selection != "undefined") \{//IE  
target.focus();  
//setCursorPosition(tc, cpos);//设置焦点  
document.selection.createRange().text = content;  
//计算光标位置  
pos = getPositionForTextArea(tc);  
\} else \{//火狐  
//计算光标位置  
pos = tc.selectionStart + content.length;  
target.val(target.val().substr(0, tc.selectionStart) + content + target.val().substring(tc.selectionStart, tclen));  
\}  
cpos = pos;  
setCursorPosition(tc, pos); //设置焦点  
\}  
  
//textarea设置光标位置  
function setCursorPosition(ctrl, pos) \{  
if (ctrl.setSelectionRange) \{  
ctrl.focus();  
ctrl.setSelectionRange(pos, pos);  
\} else if (ctrl.createTextRange) \{// IE Support  
var range = ctrl.createTextRange();  
range.collapse(true);  
range.moveEnd('character', pos);  
range.moveStart('character', pos);  
range.select();  
\}  
\}  
  
//获取多行文本框光标位置  
function getPositionForTextArea(obj, content) \{  
var CaretPos = -1;  
if (typeof document.selection != "undefined") \{//IE  
var Sel = document.selection.createRange();  
var Sel2 = Sel.duplicate();  
Sel2.moveToElementText(obj);  
while (Sel2.inRange(Sel)) \{  
Sel2.moveStart('character');  
CaretPos++;  
\}  
\}  
else \{  
if (content == undefined)  
content = "";  
CaretPos = obj.selectionStart + content.length;  
\}  
return CaretPos;  
  
\}