Question

我在结果中收到空值：title，但在DB中，location_end中有一个值

package javaapplication2;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Collections;
import java.util.Scanner;

public class Stock {
    private LinkedList<Book> books;
    public Stock(){
      books=new LinkedList<>();
    }
    public void Load(File file) throws FileNotFoundException{
        Scanner scan =new Scanner(file);
        String s=scan.nextLine().trim();
        scan.useDelimiter(":");
        String author, title,edition, publisher;
        int price, quantity;
        while(scan.hasNext()){
            author=scan.next();
            title=scan.next();
            edition=scan.next();
            publisher=scan.next();
            price=scan.nextInt();
            quantity=scan.nextInt();
            books.add(new    Book(author,title,edition,publisher,price,quantity),books.getSize()+1);

        }
    }
    public void purchase(Book book){
        Node<Book> current=books.getfirst();
        for(int i=0; i<books.getSize(); i++){
            if(current.element.getTitle().equalsIgnoreCase(book.getTitle()))
                current.element.setQuantity(current.element.getQuantity()+book.getQuantity());
            else 
                            books.add(new Book(book), books.getSize()+1);
            current=current.next;

        }

    }
    public void sale(Book book){
        Node<Book> current= books.getfirst();
        for(int i=0; i<books.getSize(); i++){
            if(current.element.getTitle().equalsIgnoreCase(book.getTitle())){
                if(current.element.getQuantity()>1)
                    current.element.setQuantity(current.element.getQuantity()-1);
                else
                    System.out.print("\n There is NO Copies of this book"+book.getTitle()+"in the stock");
                }
            else System.out.print("\n the book is NOT in the stock");
            current=current.next;
            }
        }
    public boolean search(String s){
        Node<Book> current = books.getfirst();
        for(int i=0; i<books.getSize(); i++){
            if(current.element.getTitle().equalsIgnoreCase(s))
                return true;
            else if(current.element.getAuthor().equalsIgnoreCase(s))
                return true;
            else {
                for(int y=0; y<current.element.getTitle().length()-s.length()+1; y++){
                    if(s.equalsIgnoreCase(current.element.getTitle().substring(y, y+s.length())))
                        return true;
                }
            }
        }
        return false;
    }
    public void Display(){
        Node<Book> current =books.getfirst();
        for(int i=0; i<books.getSize();i++){
            System.out.print("\n "+ current.element.toString());
            current=current.next;
        }
    }
    public void sortedReport(){
        //Collections.sort(books);
        Node<Book> current= books.getfirst();
        for(int i=0; i<books.getSize(); i++){
            System.out.print("\n "+current.element.toString());
            current= current.next;
        }
    }
}

结果：标题应该有值，但我收到空

<?php 
 $bdd = new PDO('mysql:host;dbname', 'user', 'pass');

    $result = $bdd->prepare("SELECT * FROM schedule");
        $result->execute();
        $event_array = array();
        $result->setFetchMode(PDO::FETCH_ASSOC);
        while ($record = $result->fetch()) {
            $event_array[] = array(
                'id' => $record['id'],
                'title' => $record['location_end'],
                'start' => $record['start_time'],
                'end' => $record['end_time'],
            );
        } 
    echo json_encode($event_array);


  events: {
            url: 'http://localhost/FleetManagement/getEvents.php',
            type: 'POST',
            dataType: 'json',

            success: function(){
                alert('Get Events Successfull!!');
                $('#calendar').fullCalendar('updateEvent',event);
            },
            error: function(error) {
                alert(error);
            }
        }

Answer 1

在结果标题中，我收到空值

您正在尝试使用location_end字段，但该列不在您的SQL选择中;

SELECT id, start_time, end_time, status, approval_status FROM schedule

您需要将该列添加到SQL中;

SELECT id, location_end, start_time, end_time, status, approval_status FROM schedule

Answer 2

尝试在json_encode之前打印$event_array。在我看来，'location_end'包含一些非utf8编码字符。

如何从我的SQL获取事件 - 完整日历

2 个答案: