src/main/java/ru/ulstu/conference/controller/ConferenceController.java

@@ -94,6 +94,16 @@ public class ConferenceController {
         return CONFERENCE_PAGE;
     }
 
+    @PostMapping(value = "/conference", params = "removePaper")
+    public String removePaper(@Valid ConferenceDto conferenceDto, Errors errors,
+                              @RequestParam(value = "removePaper") Integer paperIndex) throws IOException {
+        if (errors.hasErrors()) {
+            return CONFERENCE_PAGE;
+        }
+        conferenceService.removePaper(conferenceDto, paperIndex);
+        return CONFERENCE_PAGE;
+    }
+
     public List<Paper> getNotSelectPapers(List<Integer> paperIds) {
         return conferenceService.getConferencePapers(paperIds);
     }

src/main/java/ru/ulstu/conference/service/ConferenceService.java

@@ -83,6 +83,11 @@ public class ConferenceService {
         conferenceDto.getDeadlines().remove((int) deadlineIndex);
     }
 
+    public void removePaper(ConferenceDto conferenceDto, Integer paperIndex) throws IOException {
+        Paper removedPaper = conferenceDto.getPapers().remove((int) paperIndex);
+        conferenceDto.getNotSelectedPapers().add(removedPaper);
+    }
+
     public List<Paper> getConferencePapers(List<Integer> paperIds) {
         return paperService.findAllNotSelect(paperIds);
     }
@@ -94,6 +99,7 @@ public class ConferenceService {
         conference.setPing(0);
         conference.setBeginDate(conferenceDto.getBeginDate());
         conference.setEndDate(conferenceDto.getEndDate());
+        conference.setPapers(conferenceDto.getPapers());
         conference.setDeadlines(deadlineService.saveOrCreate(conferenceDto.getDeadlines()));
         if (conferenceDto.getPaperIds() != null && !conferenceDto.getPaperIds().isEmpty()) {
             conferenceDto.getPaperIds().forEach(paperId ->

src/main/resources/templates/conferences/conference.html

@@ -60,8 +60,7 @@
                                             <input class="list-group-item" type="date" name="deadline"
                                                    th:field="*{deadlines[__${rowStat.index}__].date}"/>
                                             <input type="submit" class="icon icon-delete grey-border"
-                                                   alt="Удалить" name="removeDeadline" th:value="${rowStat.index}"
-                                            />
+                                                   alt="Удалить" name="removeDeadline" th:value="${rowStat.index}"/>
                                         </div>
                                     </div>
                                 </div>
@@ -146,7 +145,7 @@
                                                 <img class="icon-paper" src="/img/conference/paper.png"/>
                                             </a>
                                             <input type="submit" class="icon icon-delete grey-border"
-                                                   alt="Удалить"/>
+                                                   alt="Удалить" name="removePaper" th:value="${rowStat.index}"/>
                                         </div>
                                     </div>
                                 </div>