Javafx集成sqlite数据库

什么是SQLite

SQLite是一款非常轻量级的关系数据库系统，支持多数SQL92标准。SQLite在使用前不需要安装设置，不需要进程来启动、停止或配置，而其他大多数SQL数据库引擎是作为一个单独的服务器进程，被程序使用某种内部进程通信(典型的是TCP／IP)，完成发送请求到服务器和接收查询结果的工作，SQLite不采用这种工作方式。使用SQLite时，访问数据库的程序直接从磁盘上的数据库文件读写，没有中间的服务器进程。

添加maven依赖

yaml 复制代码

		<dependency>
            <groupId>org.xerial</groupId>
            <artifactId>sqlite-jdbc</artifactId>
            <version>3.43.0.0</version>
        </dependency>

添加SQLite配置类

java 复制代码

import java.sql.*;

public class SQLiteInitConfig {
    public static void main(String[] args) {
        try {
            // 加载SQLite驱动程序
            Class.forName("org.sqlite.JDBC");

            // 创建数据库连接
            ProjectStaticManager.connection = DriverManager.getConnection("jdbc:sqlite:src/main/resources/database.db");

            // 创建Statement对象
            ProjectStaticManager.statement = ProjectStaticManager.connection.createStatement();

            // 创建表
            String createTableSQL = "CREATE TABLE IF NOT EXISTS hg_bq_img_size (id INTEGER PRIMARY KEY AUTOINCREMENT, " +
                    "cardType INTEGER, cutOrder INTEGER, pointX INTEGER, pointY INTEGER, width INTEGER, height INTEGER)";
            ProjectStaticManager.statement.executeUpdate(createTableSQL);

            // 插入数据 id是自增，因此新增的时候可以不管id
            String insertSQL = "INSERT INTO hg_bq_img_size (cardType, cutOrder, pointX, pointY, width, height) VALUES (1, 1, 700, 418, 880, 160)";
            int i = ProjectStaticManager.statement.executeUpdate(insertSQL);

            System.out.println("数据插入成功！");
			// 查询数据
            ResultSet rs = ProjectStaticManager.statement.executeQuery("SELECT * FROM hg_bq_img_size;");
            while (rs.next()) {
                System.out.println("id = " + rs.getString("id"));
                System.out.println("cardType = " + rs.getString("cardType"));
            }
            rs.close();

        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        // 记得程序结束的时候关闭 
        // ProjectStaticManager.statement.close();
        // ProjectStaticManager.connection.close();
    }
}

SQLite语法

java 复制代码

import com.huagao.constant.ProjectStaticManager;
import com.huagao.song.entity.HgBqImgSize;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * @Author cpf
 * @Date 2023/9/2
 */

public class HgBqImgSizeSql {

    //TODO 查询所有数据
    private static final String SQL_queryList = "SELECT * FROM hg_bq_img_size;";
    //TODO 新增数据
    private static final String SQL_saveList = "INSERT INTO hg_bq_img_size (cardType,cutOrder,pointX,pointY,width,height) VALUES (";
    //TODO 根据ID删除数据
    private static final String SQL_deleteList = "DELETE FROM hg_bq_img_size WHERE id = ";
    //TODO 查询
    public static List<HgBqImgSize> queryImgSizeList(){
        List<HgBqImgSize> bqImgSizes = new ArrayList<HgBqImgSize>();
        try {
            ResultSet rs = ProjectStaticManager.statement.executeQuery(SQL_queryList);
            while (rs.next()) {
                HgBqImgSize hgBqImgSize = new HgBqImgSize(rs.getString("id"), rs.getInt("cardType"),
                        rs.getInt("cutOrder"), rs.getInt("pointX"), rs.getInt("pointY"),
                        rs.getInt("width"), rs.getInt("height"));
                bqImgSizes.add(hgBqImgSize);
            }
            rs.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return bqImgSizes;
    }

    //TODO 根据ID删除数据
    public static int deleteImgSizeById(String id){
        int num = 0;
        try {
            num = ProjectStaticManager.statement.executeUpdate(SQL_deleteList + id + ";");
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return num;
    }

    //TODO 新增
    public static int saveImgSize(HgBqImgSize bq){
        int num = 0;
        try {
            num = ProjectStaticManager.statement.executeUpdate(SQL_saveList +
                    bq.getCardType() + ","+
                    bq.getCutOrder() +","+
                    bq.getPointX() + ","+
                    bq.getPointY() + ","+
                    bq.getWidth() + ","+
                    bq.getHeight() +
                    ")"+ ";");
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return num;
    }
}

java 复制代码

import com.huagao.myThread.thread.MyThreadPoolExecutor;
import javafx.stage.Stage;
import java.sql.Connection;
import java.sql.Statement;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ExecutorService;

/**
 * @title: IndexStageManager 
 * @Author cpf
 * @Date: 2023/9/2
 * @Version 1.0
 */
public class ProjectStaticManager {
    /**
     * SQLite database
     */
    public static Connection connection = null;
    public static Statement statement = null;
}