-
Notifications
You must be signed in to change notification settings - Fork 0
/
dataio.cpp
341 lines (284 loc) · 8.1 KB
/
dataio.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
#include "dataio.h"
#include <QDebug>
#include <string>
DatabaseHandler::DatabaseHandler(QObject* parent) : QObject(parent)
{}
bool DatabaseHandler::isIdExist(int id, const QString tableName)
{
QSqlQuery query(m_database);
query.prepare("SELECT COUNT(*) FROM " + tableName + " WHERE id = :id");
query.bindValue(":id", id);
if (!query.exec())
{
qDebug() << "Error executing query:" << query.lastError().text();
return false;
}
if (query.next())
{
int count = query.value(0).toInt();
return count > 0;
}
return false;
}
QString DatabaseHandler::getFileName()
{
return fileName;
}
bool DatabaseHandler::openDatabase(const QString& fileName)
{
m_database = QSqlDatabase::addDatabase("QSQLITE"); // 设置数据库类型为 SQLite
m_database.setDatabaseName(fileName); // 设置数据库文件名
if (!m_database.open())
{
qDebug() << "Error: unable to open database:" << m_database.lastError().text();
return false;
}
createBooksTable();
createCDTable();
return true;
createPicsTable();
}
void DatabaseHandler::closeDatabase()
{
m_database.close(); // 关闭数据库连接
}
bool DatabaseHandler::createBooksTable()
{
QSqlQuery query(m_database);
QString str =
"CREATE TABLE IF NOT EXISTS Books ("
"id INTEGER,"
"title TEXT, "
"author TEXT,"
"grade INTEGER,"
"publishingHouse TEXT,"
"isbn TEXT,"
"page INTEGER);";
if (!query.exec(str))
{
qDebug() << "Error creating Books table:" << query.lastError().text();
return false;
}
return true;
}
bool DatabaseHandler::createCDTable()
{
QSqlQuery query(m_database);
QString str =
"CREATE TABLE IF NOT EXISTS CDs ("
"id INTEGER,"
"title TEXT,"
"author TEXT,"
"grade INTEGER,"
"name TEXT,"
"PrioductionYear INTEGER,"
"VideoDuration INTEGER);";
if (!query.exec(str))
{
qDebug() << "Error creating CD table:" << query.lastError().text();
return false;
}
return true;
}
bool DatabaseHandler::createPicsTable()
{
QSqlQuery query(m_database);
QString str =
"CREATE TABLE IF NOT EXISTS Pics ("
"id INTEGER,"
"title TEXT,"
"author TEXT,"
"grade INTEGER,"
"ProductionNationality TEXT,"
"length INTEGER,"
"width INTEGER);";
if (!query.exec(str))
{
qDebug() << "Error creating Pisc table:" << query.lastError().text();
return false;
}
return true;
}
bool DatabaseHandler::insertBook(Book_1& book)
{
QSqlQuery query(m_database);
if (isIdExist(book.getId(), "Books"))
{
query.prepare("UPDATE Books SET title = :title, author = :author, grade = :grade, "
"publishingHouse = :publishingHouse, isbn = :isbn, page = :page "
"WHERE id = :id");
}
else
{
query.prepare("INSERT INTO Books (id, title, author, grade, publishingHouse, isbn, page) "
"VALUES (:id, :title, :author, :grade, :publishingHouse, :isbn, :page)");
}
query.bindValue(":id", book.getId());
query.bindValue(":title", book.getTitle());
query.bindValue(":author", book.getAuthor());
query.bindValue(":grade", book.getGrade()); // Use static_cast for clarity
query.bindValue(":publishingHouse", book.getPublishingHouse());
query.bindValue(":isbn", book.getIsbn());
query.bindValue(":page", book.getPage());
if (!query.exec())
{
qDebug() << "Error inserting into Books table:" << query.lastError().text();
return false;
}
return true;
}
bool DatabaseHandler::insertCD(VideoCD_2& cd)
{
QSqlQuery query(m_database);
QString sqlQuery;
if (isIdExist(cd.getId(), "CDs"))
{
sqlQuery = "UPDATE CDs SET title = :title, author = :author, grade = :grade, "
"name = :name, PrioductionYear = :PrioductionYear, videoDuration = :videoDuration "
"WHERE id = :id";
}
else
{
sqlQuery = "INSERT INTO CDs (id, title, author, grade, name, PrioductionYear, videoDuration) "
"VALUES (:id, :title, :author, :grade, :name, :PrioductionYear, :videoDuration)";
}
query.prepare(sqlQuery);
query.bindValue(":id", cd.getId());
query.bindValue(":title", cd.getTitle());
query.bindValue(":author", cd.getAuthor());
query.bindValue(":grade", cd.getGrade());
query.bindValue(":name", cd.getName());
query.bindValue(":PrioductionYear", cd.getProductionYear());
query.bindValue(":videoDuration", cd.getVideoDuration());
if (!query.exec())
{
qDebug() << "Error inserting into CDs table:" << query.lastError().text();
return false;
}
return true;
}
bool DatabaseHandler::insertPic(Picture_2& pic)
{
QSqlQuery query(m_database);
QString sqlQuery;
if (isIdExist(pic.getId(), "Pics"))
{
sqlQuery = "UPDATE Pics SET title = :title, author = :author, grade = :grade, "
"productionNationality = :productionNationality, length = :length, width = :width "
"WHERE id = :id";
}
else
{
sqlQuery = "INSERT INTO Pics (id, title, author, grade, productionNationality, length, width) "
"VALUES (:id, :title, :author, :grade, :productionNationality, :length, :width)";
}
query.prepare(sqlQuery);
query.bindValue(":id", pic.getId());
query.bindValue(":title", pic.getTitle());
query.bindValue(":author", pic.getAuthor());
query.bindValue(":grade", pic.getGrade());
query.bindValue(":productionNationality", pic.getProductionNationality());
query.bindValue(":length", pic.getLength());
query.bindValue(":width", pic.getWidth());
if (!query.exec())
{
qDebug() << "Error inserting into Pics table:" << query.lastError().text();
return false;
}
return true;
}
vector<Book_1> DatabaseHandler::fetchBooksData()
{
vector<Book_1> books;
QSqlQuery query("SELECT * FROM Books");
if (!query.exec())
{
// 查询失败,处理错误
qDebug() << "Error executing SQL query:" << query.lastError().text();
return books;
}
// 遍历查询结果集,将每行数据存入 QVariantList,并添加到结果列表中返回
while (query.next())
{
Book_1 book;
book.setId(query.value(0).toInt());
book.setTitle(query.value(1).toString());
book.setAuthor(query.value(2).toString());
book.setGrade(query.value(3).toString());
book.setPublishingHouse(query.value(4).toString());
book.setIsbn(query.value(5).toString());
book.setPage(query.value(6).toInt());
books.push_back(book);
}
return books;
}
vector<VideoCD_2> DatabaseHandler::fetchVideoCDData()
{
vector<VideoCD_2> videoCDs;
QSqlQuery query("SELECT * FROM CDs");
if (!query.exec())
{
// 查询失败,处理错误
qDebug() << "Error executing SQL query:" << query.lastError().text();
return videoCDs;
}
// 遍历查询结果集,将每行数据存入 QVariantList,并添加到结果列表中返回
while (query.next())
{
VideoCD_2 videoCD;
videoCD.setId(query.value(0).toInt());
videoCD.setTitle(query.value(1).toString());
videoCD.setAuthor(query.value(2).toString());
videoCD.setGrade(query.value(3).toString());
videoCD.setName(query.value(4).toString());
videoCD.setProductionYear(query.value(5).toInt());
videoCD.setVideoDuration(query.value(6).toInt());
videoCDs.push_back(videoCD);
}
return videoCDs;
}
vector<Picture_2> DatabaseHandler::fetchPictureData()
{
vector<Picture_2> Pics;
QSqlQuery query("SELECT * FROM Pics");
if (!query.exec())
{
// 查询失败,处理错误
qDebug() << "Error executing SQL query:" << query.lastError().text();
return Pics;
}
// 遍历查询结果集,将每行数据存入 QVariantList,并添加到结果列表中返回
while (query.next())
{
Picture_2 pic;
pic.setId(query.value(0).toInt());
pic.setTitle(query.value(1).toString());
pic.setAuthor(query.value(2).toString());
pic.setGrade(query.value(3).toString());
pic.setProductionNationality(query.value(4).toString());
pic.setLength(query.value(5).toInt());
pic.setWidth(query.value(6).toInt());
Pics.push_back(pic);
}
return Pics;
}
bool DatabaseHandler::deleteLine(int id)
{
// 获取所有表的名称
QStringList tables = m_database.tables();
// 遍历每个表
for (const QString& table : tables)
{
QSqlQuery query(m_database);
QString str = QString("DELETE FROM %1 WHERE id = :id;").arg(table);
query.prepare(str);
query.bindValue(":id", id);
if (!query.exec())
{
qDebug() << "Error deleting from table" << table << ":" << query.lastError().text();
// return false; // 或者继续尝试删除其他表中的数据
}
qDebug() << "Deleted from table" << table << "for id" << id;
}
return true;
}