一、最通俗的方法：request.getParameter("name属性")
源码：
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
request.setCharacterEncoding("utf-8");
out.println("姓名:"+filterHtml(request.getParameter("name"))+"<br>");
out.println("Email:"+filterHtml(request.getParameter("email"))+"<br>");
out.println("年龄:"+request.getParameter("age")+"<br>");
out.println("编程时间:"+request.getParameter("codetime")+"<br>");
out.println("操作系统:");
String os[]=request.getParameterValues("os");
out.println("<ul>");
for(int i=0;i<os.length;i++){
out.println("<li>"+os[i]+"</li>");
}
out.println("</ul><br>");
out.println("编程语言:");
String language[]=request.getParameterValues("language");
out.println("<ul>");
for(int i=0;i<language.length;i++){
out.println("<li>"+language[i]+"</li>");
}
out.println("</ul><br>");
out.println("建议:"+filterHtml(request.getParameter("comment"))+"<br>");
out.println("</BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
此法缺点：需要知道表单的name属性。以下两种不需要知道，就可以。
二、Enumeration e = request.getParameterNames()方法：
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
request.setCharacterEncoding("utf-8");
out.println("<html>");
out.println("<head><title>display survey infomation</title></head>");
out.println("<body>");
out.println("<h2>用户输入信息：</h2>");
String parameterName = null;
Enumeration e = request.getParameterNames();
while (e.hasMoreElements()) {
parameterName = (String) e.nextElement();
out.println("参数名称：" + parameterName + "<BR>");
printValues(out, request.getParameterValues(parameterName));
}
out.flush();
out.close();
}
public void printValues(PrintWriter out, String[] values) {
out.println("<ul>");
for (int i = 0; i < values.length; i++) {
out.println("<li>" + values[i] + "</li>");
}
out.println("</ul>");
}
}
三、数组方法：
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
request.setCharacterEncoding("utf-8");
out.println("<html>");
out.println("<head><title>display survey infomation</title></head>");
out.println("<body>");
out.println("<h2>用户输入信息：</h2>");
String parameterName = null;
Map map = request.getParameterMap();
Set set=map.keySet();
Iterator it=set.iterator();
while (it.hasNext()) {
parameterName = (String) it.next();
out.println("参数名称：" + parameterName + "<BR>");
printValues(out, request.getParameterValues(parameterName));
}
out.flush();
out.close();
}
public void printValues(PrintWriter out, String[] values) {
out.println("<ul>");
for (int i = 0; i < values.length; i++) {
out.println("<li>" + values[i] + "</li>");
}
out.println("</ul>");
}
}
源码测试通过，准确！！！
本文转自施杨博客园博客，原文链接：http://www.cnblogs.com/shiyangxt/archive/2008/07/25/1251706.html，如需转载请自行联系原作者
