Question

出于好奇，我发送的get和post参数具有相同的名称和不同的值。

JSP：

<form action="actionName?param1=value1" method="post">
<input type="text" value="value2" name="param1" id="param1">
<input type="submit" value="Submit">
</form>

Servlet：

public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
   doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
   String strParam1 = request.getParameter("param1");
}

我总是将strParam1的值变为＆＃34; value1＆＃34;。

那么，这是否意味着获取参数对post参数的重要性还是取决于？

Answer 1

获取和发布显然处理方式不同。令人困惑，因为我看到许多以与获取请求相同的方式处理帖子提交的例子。

以下文章深入探讨了这一点。

http://www.cse.iitb.ac.in/dbms/Data/Courses/DBIS/Software/servlets/servlet_tutorial.html#user-interaction

doPost方法使用getParameterNames和getParameterValues 获取表单数据的方法。

public void doPost(HttpServletRequest req, HttpServletResponse res)
    throws ServletException, IOException {
    // first, set the "content type" header of the response
    res.setContentType("text/html");

    //Get the response's PrintWriter to return text to the client.
        PrintWriter toClient = res.getWriter();

        try {
            //Open the file for writing the survey results.
            String surveyName = req.getParameterValues("survey")[0];
            FileWriter resultsFile = new FileWriter(resultsDir
            + System.getProperty("file.separator")
            + surveyName + ".txt", true);
            PrintWriter toFile = new PrintWriter(resultsFile);

        // Get client's form data & store it in the file
            toFile.println("<BEGIN>");
            Enumeration values = req.getParameterNames();
            while(values.hasMoreElements()) {
                String name = (String)values.nextElement();
        String value = req.getParameterValues(name)[0];
                if(name.compareTo("submit") != 0) {
                    toFile.println(name + ": " + value);
                }
            }
            toFile.println("<END>");

        //Close the file.
            resultsFile.close();

        // Respond to client with a thank you
        toClient.println("<html>");
        toClient.println("<title>Thank you!</title>");
            toClient.println("Thank you for participating");
        toClient.println("</html>");

        } catch(IOException e) {
            e.printStackTrace();
            toClient.println(
        "A problem occured while recording your answers.  "
        + "Please try again.");
        }

        // Close the writer; the response is done.
    toClient.close();
    }

get参数是否比post参数更重要？

1 个答案: