Servlet代码 request.getparameter("fname") //I can't able to get value. HTML代码 html head titleFile Uploading Form/title /head body h3File Upload:/h3 Select a file to upload: br / form action="UploadServlet" method="post" enctype="multi
request.getparameter("fname") //I can't able to get value.
HTML代码
<html>
<head>
<title>File Uploading Form</title>
</head>
<body>
<h3>File Upload:</h3>
Select a file to upload: <br />
<form action="UploadServlet" method="post"
enctype="multipart/form-data">
<input type="text" name="fname" size="50" />
<input type="file" name="file" size="50" />
<input type="submit" value="Upload File" />
</form>
</body>
</html>
我的问题是：如何在多部分帖子请求中传递fname参数？
简短回答：您将在请求的部分中找到fname.答案很长：对于多部分类型请求,即使是简单的< input type =“text”>字段值放在部分中.您将不得不迭代HttpServletRequest.getParts()返回的Part对象,并根据其name属性处理它们：
for( Part p : request.getParts() ) {
if( "fname".equals(p.getName()) ) {
...
}
else if( "file".equals(p.getName()) ) {
...
}
}
为了使事情进一步复杂化,部件的内容可用作InputStream – Part.getInputStream() – 因此您必须执行一些转换流→byte []→String来获取值.