SQL语句的bug都修完了

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() {

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");
     }
 }

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;
         }