mysql连接串怎么写 MySQL连接串
java连接Mysql的连接字符串怎么写的
import java.sql.*;
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public class SqlUtil
{
public static void main(String[] args)
{
try
{
String url="jdbc:mysql://localhost/mydb";
String user="root"; //用户名
String pwd="123456"; //密码
//加载驱动，这一句也可写为：Class.forName("com.mysql.jdbc.Driver");
Class.forName("com.mysql.jdbc.Driver").newInstance();
//建立到MySQL的连接
Connection conn = DriverManager.getConnection(url,user, pwd);
//执行SQL语句
Statement stmt = conn.createStatement();//创建语句对象，用以执行sql语言
ResultSet rs = stmt.executeQuery("select * from student");
//处理结果集
while (rs.next())
{
String name = rs.getString("name");
System.out.println(name);
}
rs.close();//关闭数据库
conn.close();
}
catch (Exception ex)
{
System.out.println("Error : " + ex.toString());
}技术问题可到itjob技术群交流
}
}
C#连接mysql数据库的字符串怎么写？
首先呢，去Mysql官网下载MySql.Data.dll，然后添加引用
using MySql.Data.MySqlClient;
然后使用连接字符串的时候，使用以下代码：
MySqlConnectionStringBuilder s = new MySqlConnectionStringBuilder();
s.Server = "192.168.0.100";
s.Port = 3306; //mysql端口号
s.Database = "dbName";
s.UserID = "root";
s.Password = "root";
s.CharacterSet = "latin1";
MySqlConnection mcon = new MySqlConnection(s.ConnectionString);
其他的也要用mysql的，比如MySqlCommand等等。有疑问可以追问~
怎么在mysql里做字符串连接
在mysql里做字符串连接主要用到“CONCAT”函数，主要使用方法如下：
这样查询出来的结果，就把原来ts_test里面的save_path和save_name组装到thumb字段里面！
c#连接到mysql 的连接字符串怎么写
ODBC DSN
ODBC -- MyODBC Driver -- local database
ODBC -- MyODBC Driver -- remote database
ODBC -- MySQL ODBC 3.51 Driver
OleDb
.NET DataProvider from CoreLab
// ODBC DSN
using System.Data.Odbc;
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString =
"Dsn=DsnName;" +
"Uid=UserName;" +
"Pwd=Secret;";
conn.Open();
// ODBC -- MyODBC Driver -- local database
using System.Data.Odbc;
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString =
"Driver={MySql};" +
"Server=localhost;" +
"Option=16834;" +
"DataBase=DataBaseName;"
conn.Open();
// ODBC -- MyODBC Driver -- remote database
using System.Data.Odbc;
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString =
"Driver={MySql};" +
"Server=db.domain.com;" +
"Option=131072;" +
"Port=3306;" +
"Stmt=;" +
"DataBase=DataBaseName;" +
"Uid=UserName;" +
"Pwd=Secret;"
conn.Open();
// ODBC -- MySQL ODBC 3.51 Driver
using System.Data.Odbc;
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString =
"Driver={MySql ODBC 3.51 Driver};" +
"Server=ServerName;" +
"Option=16834;" +
"Port=3306;" +
"Stmt=;" +
"DataBase=DataBaseName;" +
"Uid=UserName;" +
"Pwd=Secret;"
conn.Open();
// or
using System.Data.Odbc;
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString =
"DRIVER={MySql ODBC 3.51 Driver};" +
"SERVER=ServerName;" +
"DATABASE=DataBaseName;" +
"USER=UrerName;" +
"PASSWORD=Secret;"
conn.Open();
// OleDb
using System.Data.OleDb;
OleDbConnection conn = new OleDbConnection();
conn.ConnectionString =
"Provider=MySqlProv;" +
"Data Source=ServerName;" +
"User id=UserName;" +
"Password=Secret;"
conn.Open();
// .NET DataProvider from CoreLab
using CoreLab.MySql;
MySqlConnection conn = new MySqlConnection();
conn.ConnectionString =
"Host=ServerName;" +
"DataBase=DataBaseName;" +
"Protocol=TCP;" +
"Port=3306;" +
"Direct=true;" +
"Compress=false;" +
"Pooling=true;" +
"Min Pool Size=0;" +
"Max Pool Size=100;" +
"Connection Lifetime=0;" +
"User id=UserName;" +
"Password=Secret;" +
conn.Open();
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