Unity3DUnity 3D 连接 MySQL 数据库

Posted 2023-04-06 拉伊卜

1.Navicat准备 test 数据库，并在test数据库下创建 user 数据表，预先插入测试数据。

2.启动 Unity Hub 新建一个项目，然后在Unity编辑器的 Project视图 中，右击新建一个 Plugins 文件夹将连接 mysql的驱动包 导入（附加驱动包链接），之后Unity会自动引用它们。

3.在 Hierarchy视图 中点击 Main Camera 对象，然后在右边的 Inspector视图 中点击 Add Component，添加脚本组件，名称如下。

4.AccessMySQL脚本组件连接数据库和执行SQL语句代码如下

...//your code
    //MySQL 连接对象
    public static MySqlConnection dbConnection;
    //连接或关闭 MySQL数据库
    public void ConnectMySQL(string connectionStr,bool isOpen)
        if(isOpen)
            try
                dbConnection = new MySqlConnection(connectionStr);
                dbConnection.Open();
                Debug.Log("连接MySQL数据库成功");
            catch(System.Exception e)
                throw new System.Exception("连接MySQL数据库失败："+e.Message.ToString());
            
        else
            if(dbConnection != null)
                dbConnection.Close();
                dbConnection.Dispose();
                dbConnection = null;
            
        
    

    //SQL语句执行方法
    public  DataSet ExecuteQuery(string sqlStr,MySqlConnection ConnectionDB)
        if(dbConnection.State == ConnectionState.Open)
            //表的集合
            DataSet dataSet = new DataSet();
            try
                MySqlDataAdapter data = new MySqlDataAdapter(sqlStr,ConnectionDB);
                data.Fill(dataSet);
            catch(System.Exception e)
                throw new System.Exception("SQL："+sqlStr+"/n"+e.Message.ToString());
            
            return dataSet;
        
        return null;
    

    // Start is called before the first frame update
    void Start()
    
        string connectionStr = "Server = 127.0.0.1;port=3306;DataBase=test;UID=root;Pwd=1008";
        ConnectMySQL(connectionStr,true);

        string sqlQuery = "select * from user";
        DataSet ds = ExecuteQuery(sqlQuery,dbConnection);
        // Debug.Log("检索到："+ds.Tables[0].Rows.Count+" 条数据");
        for(int i = 0;i<ds.Tables[0].Rows.Count;i++)
           Debug.Log("姓名："+ ds.Tables[0].Rows[i]["name"] + " 年龄："+ds.Tables[0].Rows[i]["age"]);
        
    
...//your code

5.Unity编辑器的控制台显示执行效果，代码正常，运行成功！！！

java连接mysql的问题

package com.Test;
import java.sql.*;
public class JdbcTest1
public static void main(String[] args)
String driver = "com.MySQL.jdbc.Driver";
String url = "jdbc:MySQL://127.0.0.1:3306/scutcs";
String user = "root";
String password = "";
try
Class.forName(driver);
Connection conn = DriverManager.getConnection(url, user, password);
if(!conn.isClosed())
System.out.println("Succeeded connecting to the Database!");
Statement statement = conn.createStatement();
String sql = "select * from student";
ResultSet rs = statement.executeQuery(sql);
System.out.println("-----------------");
System.out.println("执行结果如下所示:");
System.out.println("-----------------");
System.out.println(" 学号" + "\t" + " 姓名");
System.out.println("-----------------");
String name = null;
while(rs.next())
name = rs.getString("sname");
name = new String(name.getBytes("ISO-8859-1"),"GB2312");
System.out.println(rs.getString("sno") + "\t" + name);

rs.close();
conn.close();
catch(ClassNotFoundException e)
System.out.println("Sorry,can`t find the Driver!");
e.printStackTrace();
catch(SQLException e)
e.printStackTrace();
catch(Exception e)
e.printStackTrace();




jar包导入了 \mysql-connector-java-5.0.5-bin.jar classpath 也配置了可是还是出现
Sorry,can`t find the Driver!
java.lang.ClassNotFoundException: com.MySQL.jdbc.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:186)
at com.Test.JdbcTest1.main(JdbcTest1.java:17)

String driver = "com.MySQL.jdbc.Driver"; 改成
String driver = “com.mysql.jdbc.Driver”试试 参考技术A 把mysql-connector-java-5.0.5-bin.jar 导入到tomcat的lib目录下面就ok了
com.mysql.jdbc.Driver小写mysql 参考技术B 呵呵，这个真心不清楚。。。没看懂。。。