onclick 触发一个事件跳转到servlet，当前servlet执行了两次

Question

<td><input type="button" value="查看学生信息" onclick="return dosubmit()" /></td> function dosubmit(){ var form = document.getElementById("form"); form.action="StudentResult"; return true; }package com.share.test;import java.io.IOException;import java.util.List;import java.util.Map;import java.util.concurrent.ConcurrentHashMap;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;@WebServlet("/StudentResult")public class StudentResult extends HttpServlet{ /** *  */ private static final long serialVersionUID = 1L; @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); HttpSession session = request.getSession(); Student student=new Student(); String str=""; session.setAttribute("sresult", str); request.getRequestDispatcher("/Studet.jsp").forward(request, response); }}

Answer 1

把return删了试试