为什么JSP不支持表单上的“放置"方法?有什么方法可以在jsp表单上使用put方法吗? [英] Why JSP is not supporting 'put' method on form? Is there any way to use put method on jsp form?
问题描述
我正在尝试以JSP形式实现 put 方法，但似乎支持该方法，其背后的原因是什么? 如果我使用HTML而不是JSP并调用实现为接受放置请求的servlet，那么它将按预期工作.但是相同的代码在JSP上不起作用.
I am trying to implement put method in JSP form, but seems like it is supported, what is the reason behind it ? Where if i am using HTML instead of JSP and calling a servlet implemented to accept put request, then it is working as expected. but same code is not working on JSP.
正在运行"index.html">>>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>PUT Method Test</title>
</head>
<body>
<form enctype="multipart/form-data" **method="PUT"**
action="RequestTester">
<input type="file" size="20" name="FileToUpload"
value="Select File">
<input type="submit" name="UploadFile" value="Upload">
<input type="reset" value="Reset">
</form>
</body>
</html>
无法正常工作的HTML的示例"index.jsp">>>
<form enctype="multipart/form-data" **method="PUT"**
action="RequestTester">
<input type="file" size="20" name="FileToUpload"
value="Select File">
<input type="submit" name="UploadFile" value="Upload">
<input type="reset" value="Reset">
</form>
MyServlet类>>
public class RequestTester extends HttpServlet {
private static final long serialVersionUID = 1L;
public PostRequestTester() {
super();
}
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
System.out.println("GET REQUEST STARTED..");
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
System.out.println("POST REQUEST STARTED..");
}
protected void doPut(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
System.out.println("PUT REQUEST STARTED..");
}
}
推荐答案
这不是JSP的限制.通常，PUT方法根本不打算提交表单.它有不同的目的.在任何平台上，您都可以在获取和发布之间进行选择，以提交表单.
This is not the limitation of JSP. The PUT method is generally not intended for submitting forms at all; it has a different purpose. On any platform, you may choose between get and post for submitting forms.
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