保证消息间传递，功能成功运行，后端与前端链接成功

demo/src/main/java/com/example/demo/circulator/controller/SumCirController.java

@@ -10,6 +10,7 @@ import org.springframework.web.bind.annotation.GetMapping;
 import javax.annotation.Resource;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
 
 @Controller
 public class SumCirController {
@@ -19,8 +20,8 @@ public class SumCirController {
     @Autowired
     private EPAIR_CirService epair_cirService;
 
-    @GetMapping("/cir/sum")
-    public String SumCirculator(HttpServletRequest request, HttpServletResponse response){
+    @GetMapping("/cirsum")
+    public String SumCirculator(HttpServletRequest request, HttpServletResponse response)throws IOException {
         long productNum = Long.parseLong(request.getParameter("productNum"));
         double amount = Double.parseDouble(request.getParameter("amount"));
         int year = Integer.parseInt(request.getParameter("year"));
@@ -50,6 +51,7 @@ public class SumCirController {
         }
 
         System.out.println(sum_principal_and_intrate);
+        response.sendRedirect("countCenter.html");
         return "/circulator";
     }
 

demo/src/main/java/com/example/demo/loginService/UserController.java

@@ -3,9 +3,9 @@ package com.example.demo.loginService;
 import com.example.demo.bean.User;
 import com.example.demo.loginService.API.impl.UserServiceImpl;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Controller;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.*;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
@@ -22,31 +22,33 @@ public class UserController extends HttpServlet {
     @Autowired
     private UserServiceImpl userServiceImpl;
 
-    @GetMapping("/login")
-    public String  handle(HttpServletRequest request, HttpServletResponse response)throws IOException, ServletException {
+    @PostMapping("/login")
+    //@ResponseBody
+    public void  handle( HttpServletRequest request, HttpServletResponse response)throws IOException, ServletException {
         //System.out.println("_______________");
         String userName = request.getParameter("userName");
         String userPwd = request.getParameter("userPwd");
         User user = this.userServiceImpl.selectUserByuserName(userName);
+        int result = 0;
         if(user!=null){
             if(user.getUserPwd().equals(userPwd)){
                 HttpSession session=request.getSession();
                 session.setAttribute("user",user);
-                //request.getRequestDispatcher("index.html").forward(request,response);
-                return "/index";
-            }
-            else{
-                return "/userPwdError";
-                //response.sendRedirect("userPwdError.jsp");
+                result = 1;
+            } else{
+                result = 2;
             }
         }else{
-            return "userNotExist";
-            //response.sendRedirect("notexit.jsp");
+            result = 3;
         }
+        if(result==1)response.sendRedirect("index.html");
+        else if(result==2)response.sendRedirect("login.html");
+        else response.sendRedirect("login.html");
     }
 
 
-    @GetMapping("/login1")
+    @PostMapping("/login1")
+    @ResponseBody
     public String  handle1(HttpServletRequest request,HttpServletResponse response){
         String userName = request.getParameter("userName");
         String userPwd = request.getParameter("userPwd");
@@ -55,7 +57,7 @@ public class UserController extends HttpServlet {
         user = this.userServiceImpl.selectUserByuserName(userName);
         long count = 0;
         if(user!=null){
-            return "已有该用户名";
+            return "/已有该用户名";
         }else if(userPwd.equals(userPwd1)){
                 count = this.userServiceImpl.count()+1;
                 SimpleDateFormat dateFormat=new SimpleDateFormat("yyyy-MM-dd  HH-mm-ss");

demo/src/main/java/com/example/demo/productService/controller/addController.java

@@ -23,7 +23,7 @@ public class addController extends HttpServlet {
             product.setProductNum(Long.parseLong(request.getParameter("productNum")));
             product.setProductName(request.getParameter("productName"));
             product.setBankNum(Integer.parseInt(request.getParameter("bankNum")));
-            product.setCategory(request.getParameter("productName"));
+            product.setCategory(request.getParameter("category"));
             product.setIntrate(Float.parseFloat(request.getParameter("intrate")));
             product.setProductDescription(request.getParameter("description"));
             product.setPictureAddress(request.getParameter("address"));

demo/src/main/resources/static/Login.html

@@ -300,8 +300,8 @@
                 </div>
                 <span>
                     <form action="/login" method="post">
-                        <p class="form"><input type="text" id="userName" placeholder="账号"></p>
-                        <p class="form"><input type="password" id="userPwd" placeholder="密码"></p>
+                        <p class="form"><input type="text" name="userName" placeholder="账号"></p>
+                        <p class="form"><input type="password" name="userPwd" placeholder="密码"></p>
                         <input type="submit" value="登录" class="btn" name="action">
                         <input type="button" value="注册" class="btn" onclick="location.href='Register.html'">
                     </form>