HTML
<body> <form action="/day06/RequestDemo1"> 用户名：<input type="text" name="username"><br> 密 码：<input type="password" name="password"><br> 验证码：<input type="text" name="checkcode"> <img src="/day06/ResponseDemo4" onclick="this.src=this.src+'?'+new Date().getTime()" alt="换一张" style="cursor:pointer"><br> <input type="submit" value="提交"> </form> </body>
有一个表单，下面是servlet
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//获取表单提交的所有名称和值
Enumeration e = request.getParameterNames();
while(e.hasMoreElements()){
String name = (String) e.nextElement();
String value = request.getParameter(name);
System.out.println(name+": "+value);
}
}
提交在控制台得到数据
可以用工具传递数据，注意导包
System.out.println("---------方法二-----------");
Map<String, String[]> map = request.getParameterMap();
User user = new User();
try{
BeanUtils.populate(user, map);
//<span style="white-space:pre"> </span> BeanUtils.copyProperties(user, bean); bean的拷贝
}catch(Exception e1){
e1.printStackTrace();
}
System.out.println(user);