js实现成语接龙-xg-master.zip

package cn.hnshxy.xg; import java.io.IOException; import java.util.List; import java.util.Map; 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; import com.mysql.cj.Session; @WebServlet("/jielong") public class JieLong extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // response.getWriter().append("Served at: ").append(request.getContextPath()); request.setCharacterEncoding("utf-8"); HttpSession session = request.getSession(); String cy=request.getParameter("chengyu"); String time=request.getParameter("time"); String history=(String) session.getAttribute("history"); String msg=null; String first=(String) session.getAttribute("first"); System.out.println("first="+first); // String first=null; boolean isUserWin=false; if(cy!=null) {//提交表单过来的 cy=cy.trim(); try { isUserWin=(boolean) session.getAttribute("isUserWin"); if(isUserWin)throw new Exception("不用刷新，你都是最棒的~"); if(time==null||time.isEmpty())throw new Exception("检测到非法操作~"); if(((String)session.getAttribute("time")).equals(time))throw new Exception("请不要刷新页面~"); if(cy.isEmpty())throw new Exception("请输入接龙的成语"); if(cy.length()<3||cy.length()>14)throw new Exception("成语应该在3到14个汉字之内"); if(first!=null && !cy.startsWith(first))throw new Exception("请输入以“"+first+"”开头的成语"); DBHelper db=new DBHelper(); List<Map<String,Object>> list=db.executeQuery("select cy from chengyu where cy=?",cy); if(list==null)throw new Exception(db.getErrorMessage()); if(list.size()==0) throw new Exception(msg="你输入的“"+cy+"”不是成语~");//用户输入的不是成语 //用户输入的是成语 history+=","+cy;//将用户接龙的成语加入接龙历史 list=db.executeQuery("select cy from chengyu where first=? order by rand() limit 1", cy.substring(cy.length()-1)); if(list==null)throw new Exception(db.getErrorMessage()); if(list.size()==0) { msg="恭喜你战胜了计算机~"; isUserWin=true; }else { cy=(String) list.get(0).get("cy");//现在存储的是计算机接龙的成语 history+=","+cy;//将计算接龙的成语加入接龙的历史 first=cy.substring(cy.length()-1); } }catch(Exception e) { msg=e.getMessage(); } }else { first=null; history=""; time="0"; } // history=",一清二白,白首相知,知根知底,低眉垂眼,眼疾手快,快马加鞭"; // msg="<script>alert('xiaoguo')</script>一清二白"; request.setAttribute("msg", msg); session.setAttribute("first", first); session.setAttribute("time", time); session.setAttribute("history", history); // session.setAttribute("length", history.length()); session.setAttribute("isUserWin", isUserWin); request.getRequestDispatcher("/v1/index.jsp").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }