add validation

src/main/java/ru/ulstu/core/controller/AdviceController.java

@@ -97,10 +97,4 @@ public class AdviceController {
     public ResponseExtended<String> handleUserIsUndeadException(Throwable e) {
         return handleException(ErrorConstants.USER_UNDEAD_ERROR, e.getMessage());
     }
-
-    @ExceptionHandler(Exception.class)
-    public ResponseExtended<String> handleUnknownException(Throwable e) {
-        e.printStackTrace();
-        return handleException(ErrorConstants.UNKNOWN, e.getMessage());
-    }
 }

src/main/java/ru/ulstu/paper/controller/PaperController.java

@@ -1,19 +1,17 @@
 package ru.ulstu.paper.controller;
 
 import org.springframework.stereotype.Controller;
-import org.springframework.ui.Model;
 import org.springframework.ui.ModelMap;
-import org.springframework.validation.BindingResult;
+import org.springframework.validation.Errors;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.PutMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.servlet.mvc.support.RedirectAttributes;
 import ru.ulstu.core.model.response.Response;
 import ru.ulstu.paper.model.PaperDto;
 import ru.ulstu.paper.model.PaperFilterDto;
@@ -40,23 +38,21 @@ public class PaperController {
     }
 
     @GetMapping("/paper")
-    public void getPapers(ModelMap modelMap, @RequestParam(value="id") Integer id) {
+    public void getPapers(ModelMap modelMap, @RequestParam(value = "id") Integer id) {
         if (id != null && id > 0) {
-            modelMap.put("paper", paperService.findOneDto(id));
+            modelMap.put("paperDto", paperService.findOneDto(id));
         } else {
-            modelMap.put("paper", new PaperDto());
+            modelMap.put("paperDto", new PaperDto());
         }
     }
 
     @PostMapping("/paper")
-    public String createPaper(@ModelAttribute PaperDto paperDto) throws IOException {
-        paperService.create(paperDto);
-        return "redirect:/papers/papers";
+    public String save(@Valid PaperDto paperDto, Errors errors) throws IOException {
+        if (errors.hasErrors()) {
+            return "/papers/paper";
         }
-
-    @PutMapping
-    public Response<Integer> updatePaper(@RequestBody @Valid PaperDto paperDto) throws IOException {
-        return new Response<>(paperService.update(paperDto));
+        paperService.save(paperDto);
+        return "redirect:/papers/papers";
     }
 
     @DeleteMapping("/{paper-id}")

src/main/java/ru/ulstu/paper/model/PaperDto.java

@@ -4,7 +4,9 @@ import org.hibernate.validator.constraints.NotEmpty;
 import org.springframework.format.annotation.DateTimeFormat;
 import ru.ulstu.user.model.UserDto;
 
+import javax.validation.constraints.Future;
 import javax.validation.constraints.NotNull;
+import javax.validation.constraints.Size;
 import java.util.Date;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -14,6 +16,7 @@ import static ru.ulstu.core.util.StreamApiUtils.convert;
 public class PaperDto {
     private Integer id;
     @NotEmpty
+    @Size(min = 3, max = 100)
     private String title;
     private Paper.PaperStatus status;
     private Date createDate;

src/main/java/ru/ulstu/paper/service/PaperService.java

@@ -17,6 +17,7 @@ import java.util.Date;
 import java.util.List;
 import java.util.stream.Collectors;
 
+import static org.springframework.util.ObjectUtils.isEmpty;
 import static ru.ulstu.core.util.StreamApiUtils.convert;
 import static ru.ulstu.paper.model.Paper.PaperStatus.ATTENTION;
 import static ru.ulstu.paper.model.Paper.PaperStatus.DRAFT;
@@ -150,4 +151,12 @@ public class PaperService {
             paperNotificationService.sendFailedNotification(paper, oldStatus);
         });
     }
+
+    public void save(PaperDto paperDto) throws IOException {
+        if (isEmpty(paperDto.getId())) {
+            create(paperDto);
+        } else {
+            update(paperDto);
+        }
+    }
 }

src/main/resources/templates/papers/paper.html

@@ -26,17 +26,16 @@
 
             <div class="row">
                 <div class="col-lg-12">
-                    <form method="post" action="#" th:action="@{/papers/paper}" th:object="${paper}">
+                    <form method="post" th:action="@{'/papers/paper?id='+*{id}}" th:object="${paperDto}">
                         <div class="row">
                             <div class="col-md-6 col-sm-12">
                                 <div class="form-group">
                                     <label for="title">Название:</label>
-
+                                    <input type="hidden" name="id" th:field="*{id}"/>
                                     <input class="form-control" id="title" type="text"
                                            placeholder="Название статьи"
-                                           required=""
-                                           data-validation-required-message="Введите название статьи"
                                            th:field="*{title}"/>
+                                    <p th:if="${#fields.hasErrors('title')}" th:errors="*{title}" class="alert alert-danger">Incorrect title</p>
                                     <p class="help-block text-danger"></p>
                                 </div>
 
@@ -55,9 +54,8 @@
 
                                 <div class="form-group">
                                     <label>Дедлайн:</label>
-                                    <input type="date" class="form-control" name="deadline"
-                                           th:field="*{deadlineDate}"
-                                    />
+                                    <input type="date" class="form-control" name="deadline" th:field="*{deadlineDate}"/>
+                                    <p th:if="${#fields.hasErrors('deadlineDate')}" th:errors="*{deadlineDate}" class="alert alert-danger">Incorrect title</p>
                                 </div>
 
                                 <div class="form-check">