MySQL是一種廣泛使用的開源關系型數據庫管理系統，它被廣泛用于各種應用程序的開發。圖書館管理系統是一種基于MySQL數據庫的應用程序，用于管理圖書館的圖書、借閱信息和讀者信息等。

MySQL圖書館管理系統的源代碼可以用來學習MySQL數據庫的基礎知識和應用程序開發，它包括以下幾個部分：

1、數據庫設計
CREATE DATABASE `library` DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
USE library;
CREATE TABLE `book_info` (
`book_id` int(11) NOT NULL AUTO_INCREMENT COMMENT '圖書編號',
`book_name` varchar(255) COLLATE utf8mb4_general_ci NOT NULL COMMENT '圖書名稱',
`publisher` varchar(255) COLLATE utf8mb4_general_ci NOT NULL COMMENT '出版社',
`author` varchar(255) COLLATE utf8mb4_general_ci NOT NULL COMMENT '作者',
`price` float NOT NULL COMMENT '價格',
PRIMARY KEY (`book_id`)
) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
CREATE TABLE `reader_info` (
`reader_id` int(11) NOT NULL AUTO_INCREMENT COMMENT '讀者編號',
`reader_name` varchar(255) COLLATE utf8mb4_general_ci NOT NULL COMMENT '讀者姓名',
`sex` varchar(10) COLLATE utf8mb4_general_ci NOT NULL COMMENT '性別',
`phone` varchar(20) COLLATE utf8mb4_general_ci NOT NULL COMMENT '電話',
PRIMARY KEY (`reader_id`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
CREATE TABLE `borrow_info` (
`borrow_id` int(11) NOT NULL AUTO_INCREMENT COMMENT '借閱編號',
`book_id` int(11) NOT NULL COMMENT '圖書編號',
`reader_id` int(11) NOT NULL COMMENT '讀者編號',
`borrow_date` date NOT NULL DEFAULT '0000-00-00' COMMENT '借書日期',
`return_date` date NOT NULL DEFAULT '0000-00-00' COMMENT '還書日期',
PRIMARY KEY (`borrow_id`),
KEY `book_id` (`book_id`),
KEY `reader_id` (`reader_id`),
CONSTRAINT `borrow_info_ibfk_1` FOREIGN KEY (`book_id`) REFERENCES `book_info` (`book_id`),
CONSTRAINT `borrow_info_ibfk_2` FOREIGN KEY (`reader_id`) REFERENCES `reader_info` (`reader_id`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;

2、應用程序開發

import java.sql.*;
public class LibrarySystem {
private static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
private static final String DB_URL = "jdbc:mysql://localhost:3306/library";
private static final String USER = "root";
private static final String PASSWORD = "123456";
public static void main(String[] args) {
Connection conn = null;
Statement stmt = null;
try {
Class.forName(JDBC_DRIVER);
conn = DriverManager.getConnection(DB_URL, USER, PASSWORD);
stmt = conn.createStatement();
String sql = "SELECT book_name, publisher, author, price FROM book_info";
ResultSet rs = stmt.executeQuery(sql);
while (rs.next()) {
String bookName = rs.getString("book_name");
String publisher = rs.getString("publisher");
String author = rs.getString("author");
float price = rs.getFloat("price");
System.out.println("書名：" + bookName + "，出版社：" + publisher + "，作者：" + author + "，價格：" + price);
}
rs.close();
stmt.close();
conn.close();
} catch (SQLException se) {
se.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (stmt != null) stmt.close();
} catch (SQLException se2) {
}
try {
if (conn != null) conn.close();
} catch (SQLException se) {
se.printStackTrace();
}
}
}
}

以上是一個簡單的使用MySQL數據庫的Java應用程序，它可以連接到MySQL數據庫，查詢圖書館的圖書信息，并輸出到控制臺。

綜上所述，MySQL圖書館管理系統的源代碼是一個非常實用的學習MySQL數據庫和應用程序開發的資源。