在很多项目中都会叫用户上传东西这些的,自从接触了jquery 和ajax之后就不管做什么,首先都会想到这个,我这个人呢?是比较重视客户体验的,这次我这边负责的是后台板块,然后就有一块是要求用户上传照片的,当然就想到了无刷新上传了呀,一般的jquery+ajax的话传递给php的data我习惯用json,然后就不知道怎么怎么把$_FILES数组中的内容给php,我要用move_uploaded_file这个函数来吧$_FILES['file']['tmp_name']移动到我想要的位置,tmp_name是上传的临时路径了啦,具体参看手册,数组中有很多关于文件的记录的。查询了很多记录,要达到无刷新上传,那么有的解决方法是用生成frame来做得,找了很久很久,找到一个插件,jquery的,叫jquery.form,是个表单插件,有兴趣的同学可以上网查看,我这里只说我这个的实现而已,ok,上代码:
<span 1</span> <span <!</span><span DOCTYPE HTML</span><span ></span> <span 2</span> <span <</span><span html</span><span ></span> <span 3</span> <span <</span><span head</span><span ></span> <span 4</span> <span <</span><span meta </span><span http-equiv</span><span ="Content-Type"</span><span content</span><span ="text/html; charset=UTF-8"</span><span ></span> <span 5</span> <span <</span><span title</span><span ></span>jQuery+php实现ajax文件上传<span </</span><span title</span><span ></span> <span 6</span> <span <</span><span script </span><span type</span><span ="text/javascript"</span><span src</span><span ="http://ajax.googleapis.com/ajax/libs/jquery/1.8.1/jquery.min.js"</span><span ></</span><span script</span><span ></span> <span 7</span> <span <</span><span script </span><span type</span><span ="text/javascript"</span><span src</span><span ="jquery.form.js"</span><span ></</span><span script</span><span ></span> <span 8</span> <span <</span><span style </span><span type</span><span ="text/css"</span><span ></span> <span 9</span> <span .opacity</span><span {</span> <span 10</span> <span opacity</span><span :</span><span 0.3</span><span ;</span> <span 11</span> <span filter</span><span :</span><span alpha(opacity=30)</span><span ;</span> <span 12</span> <span background-color</span><span :</span><span black</span><span ;</span> <span 13</span> <span }</span> <span 14</span> <span .mask</span><span {</span> <span 15</span> <span 16</span> <span position</span><span :</span><span fixed</span><span ;</span> <span 17</span> <span _position</span><span :</span><span absolute</span><span ;</span> <span 18</span> <span top</span><span :</span><span 0</span><span ;</span> <span 19</span> <span left</span><span :</span><span 0</span><span ;</span> <span 20</span> <span z-index</span><span :</span><span 1000</span><span ;</span> <span 21</span> <span }</span> <span 22</span> <span #main</span><span {</span> <span 23</span> <span width</span><span :</span><span 980px</span><span ;</span> <span 24</span> <span margin</span><span :</span><span 0px auto</span><span ;</span> <span 25</span> <span text-align</span><span :</span><span center</span><span ;</span> <span 26</span> <span }</span> <span 27</span> <span #loading</span><span {</span> <span 28</span> <span background-color</span><span :</span><span white</span><span ;</span> <span 29</span> <span width</span><span :</span><span 100px</span><span ;</span> <span 30</span> <span height</span><span :</span><span 20px</span><span ;</span> <span 31</span> <span position</span><span :</span><span fixed</span><span ;</span> <span 32</span> <span _position</span><span :</span><span absolute</span><span ;</span> <span 33</span> <span text-align</span><span :</span><span center</span><span ;</span> <span 34</span> <span border-style</span><span :</span><span groove</span><span ;</span> <span 35</span> <span z-index</span><span :</span><span 2000</span><span ;</span> <span 36</span> <span }</span> <span 37</span> <span </</span><span style</span><span ></span> <span 38</span> <span </</span><span head</span><span ></span> <span 39</span> <span 40</span> <span <</span><span body</span><span ></span> <span 41</span> <span <</span><span div </span><span id</span><span ="main"</span><span ></span> <span 42</span> <span <</span><span div </span><span class</span><span ="demo"</span><span ></span> <span 43</span> <span <</span><span div </span><span class</span><span ="btn"</span><span ></span> <span 44</span> <span <</span><span span</span><span ></span>添加附件<span </</span><span span</span><span ></span> <span 45</span> <span <</span><span input </span><span id</span><span ="fileupload"</span><span type</span><span ="file"</span><span name</span><span ="mypic"</span><span ></span> <span 46</span> <span </</span><span div</span><span ></span> <span 47</span> <span <</span><span div </span><span id</span><span ="zhezhao"</span><span ></span> <span 48</span> <span <</span><span div </span><span id</span><span ="loading"</span><span ></span> <span 49</span> <span <</span><span span </span><span class</span><span ="bar"</span><span ><</span><span img </span><span src</span><span ="loading.gif"</span> <span /></</span><span span</span><span ><</span><span span </span><span class</span><span ="percent"</span><span ></span>0%<span </</span><span span </span><span ></span> <span 50</span> <span </</span><span div</span><span ></span> <span 51</span> <span </</span><span div</span><span ></span> <span 52</span> <span <</span><span div </span><span id</span><span ="showimg"</span><span ></</span><span div</span><span ></span> <span 53</span> <span </</span><span div</span><span ></span> <span 54</span> <span </</span><span div</span><span ></span> <span 55</span> <span 56</span> <span <</span><span script </span><span type</span><span ="text/javascript"</span><span ></span> <span 57</span> <span $(</span><span function</span><span () { </span><span 58</span> <span var</span><span percent </span><span =</span><span $(</span><span '</span><span .percent</span><span '</span><span ); </span><span 59</span> <span var</span><span showimg </span><span =</span><span $(</span><span '</span><span #showimg</span><span '</span><span ); </span><span 60</span> <span var</span><span zhezhao </span><span =</span><span $(</span><span "</span><span #zhezhao</span><span "</span><span ); </span><span 61</span> <span var</span><span btn </span><span =</span><span $(</span><span "</span><span .btn span</span><span "</span><span ); </span><span 62</span> <span zhezhao.hide(); </span><span 63</span> <span $(</span><span "</span><span #fileupload</span><span "</span><span ).wrap(</span><span "</span><span <form id='myupload' action='action.php' method='post' enctype='multipart/form-data'></form></span><span "</span><span ); </span><span 64</span> <span $(</span><span "</span><span #fileupload</span><span "</span><span ).change(</span><span function</span><span (){ </span><span 65</span> <span $(</span><span "</span><span #myupload</span><span "</span><span ).ajaxSubmit({ </span><span 66</span> <span dataType: </span><span '</span><span json</span><span '</span><span , </span><span 67</span> <span beforeSend: </span><span function</span><span () { </span><span 68</span> <span showimg.empty(); </span><span 69</span> <span zhezhao.show(); </span><span 70</span> <span var</span><span percentVal </span><span =</span> <span '</span><span 0%</span><span '</span><span ; </span><span 71</span> <span percent.html(percentVal); </span><span 72</span> <span btn.html(</span><span "</span><span 上传中...</span><span "</span><span ); </span><span 73</span> <span }, </span><span 74</span> <span uploadProgress: </span><span function</span><span (event, position, total, percentComplete) { </span><span 75</span> <span $(</span><span "</span><span #zhezhao</span><span "</span><span ).attr(</span><span "</span><span class</span><span "</span><span ,</span><span "</span><span mask opacity</span><span "</span><span ); </span><span 76</span> <span $(</span><span "</span><span #zhezhao</span><span "</span><span ).css(</span><span '</span><span width</span><span '</span><span ,$(window).width()); </span><span 77</span> <span $(</span><span "</span><span #zhezhao</span><span "</span><span ).css(</span><span '</span><span height</span><span '</span><span ,$(window).height()); </span><span 78</span> <span var</span><span percentVal </span><span =</span><span percentComplete </span><span +</span> <span '</span><span %</span><span '</span><span ; </span><span 79</span> <span percent.html(percentVal); </span><span 80</span> <span $(</span><span "</span><span #loading</span><span "</span><span ).css(</span><span '</span><span margin-left</span><span '</span><span ,$(window).width()</span><span /</span><span 2-50);</span> <span 81</span> <span $(</span><span "</span><span #loading</span><span "</span><span ).css(</span><span '</span><span margin-top</span><span '</span><span ,$(window).height()</span><span /</span><span 2-10);</span> <span 82</span> <span }, </span><span 83</span> <span success: </span><span function</span><span (data) { </span><span 84</span> <span var</span><span img </span><span =</span> <span "</span><span files/</span><span "</span><span +</span><span data.pic; </span><span 85</span> <span zhezhao.hide(); </span><span 86</span> <span showimg.html(</span><span "</span><span <img src='</span alt="jquery ajax php 无刷新上传文件 带 遮罩 进度条 效果的哟" ><span "</span><span +</span><span img</span><span +</span><span "</span><span '></span><span "</span><span ); </span><span 87</span> <span btn.html(</span><span "</span><span 添加附件</span><span "</span><span ); </span><span 88</span> <span }, </span><span 89</span> <span error:</span><span function</span><span (xhr){ </span><span 90</span> <span btn.html(</span><span "</span><span 上传失败</span><span "</span><span ); </span><span 91</span> <span } </span><span 92</span> <span }); </span><span 93</span> <span }); </span><span 94</span> <span }); </span><span 95</span> <span </</span><span script</span><span ></span> <span 96</span> <span 97</span> <span </</span><span body</span><span ></span> <span 98</span> <span </</span><span html</span><span ></span>
响应页面action.php中只是简单的处理上传,然后以json数据的形式返回,供前台显示
<span 1</span> <?<span php </span><span 2</span> <span 3</span> <span $picname</span> = <span $_FILES</span>['mypic']['name'<span ]; </span><span 4</span> <span $picsize</span> = <span $_FILES</span>['mypic']['size'<span ]; </span><span 5</span> <span if</span> (<span $picname</span> != ""<span ) { </span><span 6</span> <span if</span> (<span $picsize</span> > 1024000<span ) { </span><span 7</span> <span echo</span> '图片大小不能超过1M'<span ; </span><span 8</span> <span exit</span><span ; </span><span 9</span> <span } </span><span 10</span> <span $type</span> = <span strstr</span>(<span $picname</span>, '.'<span ); </span><span 11</span> <span if</span> (<span $type</span> != ".gif" && <span $type</span> != ".jpg"<span ) { </span><span 12</span> <span echo</span> '图片格式不对!'<span ; </span><span 13</span> <span exit</span><span ; </span><span 14</span> <span } </span><span 15</span> <span $rand</span> = <span rand</span>(100, 999<span ); </span><span 16</span> <span $pics</span> = <span date</span>("YmdHis") . <span $rand</span> . <span $type</span><span ; </span><span 17</span> <span //</span><span 上传路径</span> <span 18</span> <span $pic_path</span> = "files/". <span $pics</span><span ; </span><span 19</span> <span move_uploaded_file</span>(<span $_FILES</span>['mypic']['tmp_name'], <span $pic_path</span><span ); </span><span 20</span> <span } </span><span 21</span> <span $size</span> = <span round</span>(<span $picsize</span>/1024,2<span ); </span><span 22</span> <span $arr</span> = <span array</span><span ( </span><span 23</span> 'name'=><span $picname</span>, <span 24</span> 'pic'=><span $pics</span>, <span 25</span> 'size'=><span $size</span> <span 26</span> <span ); </span><span 27</span> <span echo</span> json_encode(<span $arr</span><span ); </span><span 28</span> ?>
然后就完成啦。
好像还有jquery.form还没有给大家,这里就不说了,我网盘有写好的demo,需要的同学可以下载看。
jquery+ajax(php)无刷新上传文件带进度demo下载

实现方法:1、用“$("img").delay(毫秒数).fadeOut()”语句,delay()设置延迟秒数;2、用“setTimeout(function(){ $("img").hide(); },毫秒值);”语句,通过定时器来延迟。

修改方法:1、用css()设置新样式,语法“$(元素).css("min-height","新值")”;2、用attr(),通过设置style属性来添加新样式,语法“$(元素).attr("style","min-height:新值")”。

区别:1、axios是一个异步请求框架,用于封装底层的XMLHttpRequest,而jquery是一个JavaScript库,只是顺便封装了dom操作;2、axios是基于承诺对象的,可以用承诺对象中的方法,而jquery不基于承诺对象。

增加元素的方法:1、用append(),语法“$("body").append(新元素)”,可向body内部的末尾处增加元素;2、用prepend(),语法“$("body").prepend(新元素)”,可向body内部的开始处增加元素。

在jquery中,apply()方法用于改变this指向,使用另一个对象替换当前对象,是应用某一对象的一个方法,语法为“apply(thisobj,[argarray])”;参数argarray表示的是以数组的形式进行传递。

删除方法:1、用empty(),语法“$("div").empty();”,可删除所有子节点和内容;2、用children()和remove(),语法“$("div").children().remove();”,只删除子元素,不删除内容。

去掉方法:1、用“$(selector).removeAttr("readonly")”语句删除readonly属性;2、用“$(selector).attr("readonly",false)”将readonly属性的值设置为false。

on()方法有4个参数:1、第一个参数不可省略,规定要从被选元素添加的一个或多个事件或命名空间;2、第二个参数可省略,规定元素的事件处理程序;3、第三个参数可省略,规定传递到函数的额外数据;4、第四个参数可省略,规定当事件发生时运行的函数。


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