From 1ce4b97fd60395166e80e313905d4e1189faa84e Mon Sep 17 00:00:00 2001
From: heshunme <heshunme@outlook.com>
Date: Sun, 14 Jul 2024 18:36:20 +0800
Subject: [PATCH] =?UTF-8?q?=E6=96=B0=E5=A2=9E=E9=94=99=E8=AF=AF=E6=8F=90?=
 =?UTF-8?q?=E7=A4=BA?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/com/web/web_assignment/DatabaseService.java | 3 +++
 src/main/java/com/web/web_assignment/ProjectBean.java     | 1 +
 2 files changed, 4 insertions(+)

diff --git a/src/main/java/com/web/web_assignment/DatabaseService.java b/src/main/java/com/web/web_assignment/DatabaseService.java
index 7cd2ee0..644fea2 100644
--- a/src/main/java/com/web/web_assignment/DatabaseService.java
+++ b/src/main/java/com/web/web_assignment/DatabaseService.java
@@ -215,6 +215,9 @@ public class DatabaseService {
                     int count = rs.getInt(1);
 
                     if (count > 0) {
+                        if (count>1){
+                            throw new SQLException("Duplicate project found");
+                        }
                         String updateSql = "UPDATE projects SET summary = ?, description = ?, keywords = ?, type = ?, collaborators = ?, link = ?, time = ? WHERE title = ? AND user_id = (SELECT id FROM users WHERE username = ?)";
                         try (PreparedStatement updateStmt = conn.prepareStatement(updateSql)) {
                             updateStmt.setString(1, project.getSummary());
diff --git a/src/main/java/com/web/web_assignment/ProjectBean.java b/src/main/java/com/web/web_assignment/ProjectBean.java
index 8c7f898..cc6b8ea 100644
--- a/src/main/java/com/web/web_assignment/ProjectBean.java
+++ b/src/main/java/com/web/web_assignment/ProjectBean.java
@@ -151,6 +151,7 @@ public class ProjectBean implements Serializable {
             context.addMessage("saveButton", new FacesMessage(FacesMessage.SEVERITY_INFO, "Submission Succeeded", null));
             loadAllKeywords();
         } catch (SQLException e) {
+            context.addMessage("saveButton", new FacesMessage(FacesMessage.SEVERITY_ERROR, "Submission Failed", null));
             e.printStackTrace();
         }
         return "project";