最近MOMO身心疲惫。。今天是周末在家无聊我还是决定来学习。不知道学什么，就学MySQL吧。本篇主要记录从MySQL安装到局域网内任意机器连接数据库，也算是对自己学习的总结。今天我没用Mac电脑，而是选择Windows，没有别有用心，而是想熟悉一下Windows下操作Unity。
官网上下载MySQL的安装程序，这里有一篇详细的安装文章，http://www.jb51.net/article/23876.htm 为了让中文完美的运行，配置MySQL的时候Character Set处设置成UTF-8，好像默认是不能显示中文。配置完毕后就可以在本机中启动MySQL，也可以在cmd命令行中start和stop 启动与关闭MySQL。
net start mysql
net stop mysql
为了让本机MySQL数据库可以在局域网中任意机器都可以访问，请看 下面这个网址。文章有一点点讲的不是很清楚，所以我在补充一下、我用的是Navicat Pewmium查看数据库，我觉得这个数据库挺好的，因为我在Mac上也是用的这个数据库 。（大家可以在网络上下载它，Windows版本居然有汉化的）如下图所示，点击用户，然后双击”root@%” 最后把主机的名字改成 “%”即可、下面就是重点了，打开cmd 窗口cd到MySQL的路径下，一定要cd到这个路径下，不然mysql 会是无法识别的指令噢。然后执行命令：mysql grant all privileges on *.* to root@”%” identified by ‘abc’ with grant option; flush privileges;在执行命令：mysql flush privileges;OK这样就行了。然后开始看看代码怎么写，为了方便数据库的创建、增加、删除、修改、查询、我封装了一个类。欢迎大家测试 啦啦啦啦。SqlAccess.csusing UnityEngine; using System; using System.Data; using System.Collections; using MySql.Data.MySqlClient; using MySql.Data; using System.IO; public class SqlAccess { public static MySqlConnection dbConnection; //如果只是在本地的话，写localhost就可以。 // static string host = "localhost"; //如果是局域网，那么写上本机的局域网IP static string host = "192.168.1.106"; static string id = "root"; static string pwd = "1234"; static string database = "xuanyusong"; public SqlAccess() { OpenSql(); } public static void OpenSql() { try { string connectionString = string.Format("Server = {0};port={4};Database = {1}; User ID = {2}; Password = {3};",host,database,id,pwd,"3306"); dbConnection = new MySqlConnection(connectionString); dbConnection.Open(); }catch (Exception e) { throw new Exception("服务器连接失败，请重新检查是否打开MySql服务。" + e.Message.ToString()); } } public DataSet CreateTable (string name, string[] col, string[] colType) { if (col.Length != colType.Length) { throw new Exception ("columns.Length != colType.Length"); } string query = "CREATE TABLE " + name + " (" + col[0] + " " + colType[0]; for (int i = 1; i < col.Length; ++i) { query += ", " + col[i] + " " + colType[i]; } query += ")"; return ExecuteQuery(query); } public DataSet CreateTableAutoID (string name, string[] col, string[] colType) { if (col.Length != colType.Length) { throw new Exception ("columns.Length != colType.Length"); } string query = "CREATE TABLE " + name + " (" + col[0] + " " + colType[0] + " NOT NULL AUTO_INCREMENT"; for (int i = 1; i < col.Length; ++i) { query += ", " + col[i] + " " + colType[i]; } query += ", PRIMARY KEY ("+ col[0] +")" + ")"; Debug.Log(query); return ExecuteQuery(query); } //插入一条数据，包括所有，不适用自动累加ID。 public DataSet InsertInto (string tableName, string[] values) { string query = "INSERT INTO " + tableName + " VALUES (" + "'"+ values[0]+ "'"; for (int i = 1; i < values.Length; ++i) { query += ", " + "'"+values[i]+ "'"; } query += ")"; Debug.Log(query); return ExecuteQuery (query); } //插入部分ID public DataSet InsertInto (string tableName, string[] col,string[] values) { if (col.Length != values.Length) { throw new Exception ("columns.Length != colType.Length"); } string query = "INSERT INTO " + tableName + " (" + col[0]; for (int i = 1; i < col.Length; ++i) { query += ", "+col[i]; } query += ") VALUES (" + "'"+ values[0]+ "'"; for (int i = 1; i < values.Length; ++i) { query += ", " + "'"+values[i]+ "'"; } query += ")"; Debug.Log(query); return ExecuteQuery (query); } public DataSet SelectWhere (string tableName, string[] items, string[] col, string[] operation, string[] values) { if (col.Length != operation.Length || operation.Length != values.Length) { throw new Exception ("col.Length != operation.Length != values.Length"); } string query = "SELECT " + items[0]; for (int i = 1; i < items.Length; ++i) { query += ", " + items[i]; } query += " FROM " + tableName + " WHERE " + col[0] + operation[0] + "'" + values[0] + "' "; for (int i = 1; i < col.Length; ++i) { query += " AND " + col[i] + operation[i] + "'" + values[0] + "' "; } return ExecuteQuery (query); } public DataSet UpdateInto (string tableName, string []cols,string []colsvalues,string selectkey,string selectvalue) { string query = "UPDATE "+tableName+" SET "+cols[0]+" = "+colsvalues[0]; for (int i = 1; i < colsvalues.Length; ++i) { query += ", " +cols[i]+" ="+ colsvalues[i]; } query += " WHERE "+selectkey+" = "+selectvalue+" "; return ExecuteQuery (query); } public DataSet Delete(string tableName,string []cols,string []colsvalues) { string query = "DELETE FROM "+tableName + " WHERE " +cols[0] +" = " + colsvalues[0]; for (int i = 1; i < colsvalues.Length; ++i) { query += " or " +cols[i]+" = "+ colsvalues[i]; } Debug.Log(query); return ExecuteQuery (query); } public void Close() { if(dbConnection != null) { dbConnection.Close(); dbConnection.Dispose(); dbConnection = null; } } public static DataSet ExecuteQuery(string sqlString) { if(dbConnection.State==ConnectionState.Open) { DataSet ds = new DataSet(); try { MySqlDataAdapter da = new MySqlDataAdapter(sqlString, dbConnection); da.Fill(ds); } catch (Exception ee) { throw new Exception("SQL:" + sqlString + "/n" + ee.Message.ToString()); } finally { } return ds; } return null; } }然后在来看看调用，把如下脚本绑定在任意对象即可，调用包括、创建表、插入信息、查找信息、删除信息、更新信息。代码比较简单我就不一一注释了，这里我用try catch如果有错误信息将打印在屏幕中。 创建表包括是否递增ID，所以有两种创建表的方式。如果你的数据库是提前预制的话可以这样来读取数据库。using UnityEngine; using System; using System.Data; using System.Collections; using MySql.Data.MySqlClient; using MySql.Data; using System.IO; public class NewBehaviourScript : MonoBehaviour { string Error = null; void Start () { try { SqlAccess sql = new SqlAccess(); sql.CreateTableAutoID("momo",new string[]{"id","name","qq","email","blog"}, new string[]{"int","text","text","text","text"}); //sql.CreateTable("momo",new string[]{"name","qq","email","blog"}, new string[]{"text","text","text","text"}); sql.InsertInto("momo",new string[]{"name","qq","email","blog"},new string[]{"xuanyusong","289187120","xuanyusong@gmail.com","xuanyusong.com"}); sql.InsertInto("momo",new string[]{"name","qq","email","blog"},new string[]{"ruoruo","34546546","ruoruo@gmail.com","xuanyusong.com"}); DataSet ds = sql.SelectWhere("momo",new string[]{"name","qq"},new string []{"id"},new string []{"="},new string []{"1"}); if(ds != null) { DataTable table = ds.Tables[0]; foreach (DataRow row in table.Rows) { foreach (DataColumn column in table.Columns) { Debug.Log(row[column]); } } } sql.UpdateInto("momo",new string[]{"name","qq"},new string[]{"'ruoruo'","'11111111'"}, "email", "'xuanyusong@gmail.com'" ); sql.Delete("momo",new string[]{"id","email"}, new string[]{"1","'000@gmail.com'"} ); sql.Close(); }catch(Exception e) { Error = e.Message; } } // Update is called once per frame void OnGUI () { if(Error != null) { GUILayout.Label(Error); } } }
