From ef9ebbadddae8c777cb28a1f07012a8d46bae0e6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E5=BE=A1=E5=9D=82=E6=98=B4?= Date: Mon, 23 Dec 2024 20:39:26 +0800 Subject: [PATCH] =?UTF-8?q?SQL=E8=AF=AD=E5=8F=A5=E7=9A=84bug=E9=83=BD?= =?UTF-8?q?=E4=BF=AE=E5=AE=8C=E4=BA=86?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../com/msksbr/MainFrm/MenuItemDiaog/Adder/BookAdder.java | 4 ++-- .../msksbr/MainFrm/MenuItemDiaog/Adder/StudentAdder.java | 4 ++-- .../src/com/msksbr/MainFrm/MenuItemDiaog/SearchDIalog.java | 6 +++--- 3 files changed, 7 insertions(+), 7 deletions(-) diff --git a/TermFinalHomework/src/com/msksbr/MainFrm/MenuItemDiaog/Adder/BookAdder.java b/TermFinalHomework/src/com/msksbr/MainFrm/MenuItemDiaog/Adder/BookAdder.java index c6a43f5..a0aacd8 100644 --- a/TermFinalHomework/src/com/msksbr/MainFrm/MenuItemDiaog/Adder/BookAdder.java +++ b/TermFinalHomework/src/com/msksbr/MainFrm/MenuItemDiaog/Adder/BookAdder.java @@ -67,9 +67,9 @@ public class BookAdder extends JDialog { } public int getBookMaxID() throws SQLException { - ResultSet rs = connector.executeQuery("SELECT MAX(book_id) FROM books;"); + ResultSet rs = connector.executeQuery("SELECT MAX(book_id) AS max_book_id FROM books;"); rs.next(); - return rs.getInt("MAX(book_id)"); + return rs.getInt("max_book_id"); } public void setLocation() { diff --git a/TermFinalHomework/src/com/msksbr/MainFrm/MenuItemDiaog/Adder/StudentAdder.java b/TermFinalHomework/src/com/msksbr/MainFrm/MenuItemDiaog/Adder/StudentAdder.java index 4a5d966..1b27b11 100644 --- a/TermFinalHomework/src/com/msksbr/MainFrm/MenuItemDiaog/Adder/StudentAdder.java +++ b/TermFinalHomework/src/com/msksbr/MainFrm/MenuItemDiaog/Adder/StudentAdder.java @@ -90,8 +90,8 @@ public class StudentAdder extends JDialog { } public int getStudentMaxID() throws SQLException { - ResultSet rs = connector.executeQuery("SELECT MAX(student_id) FROM students;"); + ResultSet rs = connector.executeQuery("SELECT MAX(student_id) AS max_student_id FROM students;"); rs.next(); - return rs.getInt("MAX(student_id)"); + return rs.getInt("max_student_id"); } } diff --git a/TermFinalHomework/src/com/msksbr/MainFrm/MenuItemDiaog/SearchDIalog.java b/TermFinalHomework/src/com/msksbr/MainFrm/MenuItemDiaog/SearchDIalog.java index e8ebdd5..6cff083 100644 --- a/TermFinalHomework/src/com/msksbr/MainFrm/MenuItemDiaog/SearchDIalog.java +++ b/TermFinalHomework/src/com/msksbr/MainFrm/MenuItemDiaog/SearchDIalog.java @@ -104,11 +104,11 @@ public class SearchDIalog extends JDialog { private String SQLExeMaker(String table) { if (table.equals("books")) { - return "SELECT * FROM `books` WHERE `book_id` = " + idInt + ";"; + return "SELECT * FROM books WHERE book_id = " + idInt + ";"; } else if (table.equals("students")) { - return "SELECT * FROM `students` WHERE `student_id` = " + idInt + ";"; + return "SELECT * FROM students WHERE student_id = " + idInt + ";"; } else if (table.equals("rents")) { - return "SELECT * FROM `rents` WHERE `book_id` = " + idInt + ";"; + return "SELECT * FROM rents WHERE book_id = " + idInt + ";"; } else { return null; }