文件上传利器SWFUpload使用指南

SWFUpload是一个flash和js相结合而成的文件上传插件，其功能非常强大。以前在项目中用过几次，但它的配置参数太多了，用过后就忘记怎么用了，到以后要用时又得到官网上看它的文档，真是太烦了。所以索性就把它的用法记录下来，也方便英语拙计的同学查看，利人利己，一劳永逸。

SWFUpload的特点：

1、用flash进行上传，页面无刷新，且可自定义Flash按钮的样式;

2、可以在浏览器端就对要上传的文件进行限制;

3、允许一次上传多个文件，但会有一个上传队列，队列里文件的上传是逐个进行的，服务器端接收文件时跟普通的表单上传文件是一样的;

4、提供了丰富的事件接口供开发者使用;

SWFUpload的文件上传流程是这样的：

1、引入相应的js文件

2、实例化SWFUpload对象，传入一个配置参数对象进行各方面的配置。

3、点击SWFUpload提供的Flash按钮，弹出文件选取窗口选择要上传的文件；

4、文件选取完成后符合规定的文件会被添加到上传的队列里；

5、调用startUpload方法让队列里文件开始上传；

6、文件上传过程中会触发相应的事件，开发者利用这些事件来更新ui、处理错误、发出提示等等；

SWFUpload包括三部分的内容：SWFUpload.js、swfupload.swf、初始化配置参数及各种事件处理函数。所以首先在页面引入SWFUpload.js

1	<script src= 'SWFUpload.js' ></script>

然后实例化一个SWFUpload对象：

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var  swfu;

     

window.onload = function  () {

     settings_object = { //定义参数配置对象

         upload_url : "http://www.swfupload.org/upload.php" ,

             flash_url : "http://www.swfupload.org/swfupload.swf" ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

file_post_name : "Filedata" ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

post_params : {

            "post_param_name_1"  : "post_param_value_1" ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

"post_param_name_2"  "post_param_value_2" ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

"post_param_name_n"  "post_param_value_n"

},

use_query_string : false ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

requeue_on_error : ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

http_success : [201,202],

assume_success_timeout : 0,

file_types : "*.jpg;*.gif" ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

file_types_description: "Web Image Files" ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

file_size_limit : "1024" ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

file_upload_limit : 10,

file_queue_limit : 2,

 

debug : ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

     

prevent_swf_caching : ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

preserve_relative_urls : ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

     

button_placeholder_id : "element_id" ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

button_image_url : "http://www.swfupload.org/button_sprite.png" ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

button_width : 61,

button_height : 22,

button_text : "<b>Click</b> <span class=" redText ">here</span>" ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

button_text_style : ".redText { color: #FF0000; }" ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

button_text_left_padding : 3,

button_text_top_padding : 2,

button_action : SWFUpload.BUTTON_ACTION.SELECT_FILES,

button_disabled : ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.8em!important; margin:0px!important; outline:rgb(0,

button_cursor : SWFUpload.CURSOR.HAND,

button_window_mode : SWFUpload.WINDOW_MODE.TRANSPARENT,

     

swfupload_loaded_handler : swfupload_loaded_function,

file_dialog_start_handler : file_dialog_start_function,

file_queued_handler : file_queued_function,

file_queue_error_handler : file_queue_error_function,

file_dialog_complete_handler : file_dialog_complete_function,

upload_start_handler : upload_start_function,

upload_progress_handler : upload_progress_function,

upload_error_handler : upload_error_function,

upload_success_handler : upload_success_function,

upload_complete_handler : upload_complete_function,

debug_handler : debug_function,

     };

     

swfu = new  SWFUpload(settings_object); //实例化一个SWFUpload，传入参数配置对象

};

/*定义各种事件监听函数*/

swfupload_loaded_function(){}

file_dialog_start_function(){}

...等等