为什么使用Servlet会出现这种现象,html代码明显指向req3,但form表单提交后却指向req2,且method也没有变化成get,求解答



为什么使用Servlet会出现这种现象,html代码明显指向req3,但form表单提交后却指向req2,且method也没有变化成get,求解答



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public class ServletDemo02 extends HttpServlet {
private static final long serialVersionUID = 1L;
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//获取客户端提交到服务端的method对应的值
String md=request.getParameter("method");
//定义变量,存放功能执行完毕之后要转发的路径
String path=null;
//---------------------------------------------------------------------------------------------
//通过反射 执行对应方法, 减少判断method的if else语句
//获取到当前字节码对象(ServletDemo02.class在内存中对象)
Class clazz = this.getClass();
try {
//获取clazz上名称为md方法
Method method=clazz.getMethod(md, HttpServletRequest.class,HttpServletResponse.class);
if(null!=method){
//调用找到的方法
path=(String)method.invoke(this, request,response);
}
if(null!=path){
//服务端的转发
request.getRequestDispatcher(path).forward(request, response);
}
} catch (Exception e) {
e.printStackTrace();
}
//----------------------------------------------------------------------------------------------------------
}
public String addStu(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("添加学生");
return "/test.html";
}
public String delStu(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("删除学生");
return "/test.html";
}
public String checkStu(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("检查学生");
response.getWriter().println("DDDDDD");
return null;
}
}