JQuery.from.js Ajax上传附件

使用JQuery.form插件实现无跳转上传。

以下附上简单实现。

准备：commons-fileupload.jar
     commons-io-1.1.jar
     jquery-1.3.1.js
     jquery.form.js

    表单提交脚本：

$(document).ready(function() {
    var options = { 
        target:        '#output2',
        beforeSubmit:  showRequest,
        success:       showResponse
    };
    $('#form1').submit(function() {
        $(this).ajaxSubmit(options);
        return false;//阻止表单提交
    });
    function showRequest(formData, jqForm, options) {
        var queryString = $.param(formData); 
        alert('queryString==' + queryString); 
        return true; 
    }
    function showResponse(responseText, statusText) {
        alert('status: ' + statusText + '\n\nresponseText:'+responseText);
    }
});

    html表单：

<form action="MyJsp.jsp" method="post" name="form1" id="form1" enctype="multipart/form-data">
    	<input type="file" id="file1" name="file1"/><br/>
    	<input type="text" id="username" name="username" value=""/>
    	<input type="submit" name="submitButton" value="update">
    	<div id="output2"></div>
</form>

    java处理代码：

DiskFileItemFactory factory = new DiskFileItemFactory();
String filePath = application.getRealPath("/upload");
factory.setRepository(new File(filePath));
factory.setSizeThreshold(1024*1024);
//创建新的文件上传处理类
ServletFileUpload upload = new ServletFileUpload(factory);

try {
    List list = upload.parseRequest(request);   //处理请求
    for(FileItem item : list){
        if(item.isFormField()){//表单元素
        	   //String name=item.getFieldName();
    	   //System.out.println("value==>"+item.getString());
        }
        else {
            String name=item.getFieldName();
            String value=item.getName();
            int start=value.lastIndexOf("\\");
            String fileName=value.substring(start+1);
            System.out.println("fileName=>"+fileName);
            item.write(new File(filePath,fileName));
        }
    }
    response.setContentType("text/html");
    response.setCharacterEncoding("GBK");
    response.setHeader("cache-control","no-cache");
    PrintWriter out = response.getWriter();
    out.print("OK");
    out.flush();
    out.close();
} catch (FileUploadException e) {
    e.printStackTrace();
}