request.getParameter的值为空 分析

 

 

<form id="form11" method="post" action="/manager/mail/sendmail" enctype="multipart/form-data" >标题：<input name="mailtitle" type="text">内容：<textarea rows="10" cols="20" name="mailcontent"></textarea><input type="submit" value="发送"></form>

 

 

使用servlet得到form参数

 

String mailcontent = request.getParameter("mailcontent");String mailtitle = request.getParameter("mailtitle");

 

 

结果：无法得到表单提交的值，mailcontent = null;mailtitle = null;

 

解决办法：需要删除 enctype="multipart/form-data"

<form id="form11" method="post" action="/manager/mail/sendmail" >标题：<input name="mailtitle" type="text">内容：<textarea rows="10" cols="20" name="mailcontent"></textarea><input type="submit" value="发送"></form>