[轉]MySQL的簡單使用和JDBC示例

MySql簡單操作

//啟動mysql
net start mysql //登陸 mysql -u root -p //創建建數據庫 create database mydb; create database test; //刪除數據庫 drop database test; //使用數據庫 use mydb; //創建表 create table mytable（name varchar（20），sex char）; //顯示數據庫中所有表 show tables; //增加一列 alter table mytable add age int; //插入 insert mytable value（"liu",'f',22）; insert mytable value（"wang",'m',22）; insert mytable(name,sex) value("li",'f'); insert mytable value（"zhao",'m',22）; //刪除表中項 delete from mytable where name=”liu“; delete from mytable where name=”li“; //更新 update mytable set age = 23 where name = "wang"; //查詢 select * from mytable; 

JDBC

• JDBC驅動程序分為4類
  • JDBC-ODBC橋
  • 部分本地API，部分Java驅動程序
  • JDBC網絡純Java驅動程序
  • 本地協議Java驅動程序

JDBC的示例

import java.sql.*; import com.mysql.jdbc.Driver; public class JDBCMySql { public void operateMySql() throws SQLException, ClassNotFoundException{ String driverName ="com.mysql.jdbc.Driver"; String URL = "jdbc:mysql://127.0.0.1:3306/mydb"; String sql = "SELECT * FROM mydb.mytable"; String username = "root"; String password = ""; Connection conn = null; try{ //加載驅動 Driver.class.forName(driverName); //建立連接 conn = DriverManager.getConnection(URL,username,password); //創建statement來執行sql語句 Statement ps = conn.createStatement(); //結果集處理 ResultSet rs = ps.executeQuery(sql); while(rs.next()) { System.out.println(rs.getString("name")+","+rs.getString("sex")+","+rs.getInt("age")); } } catch (ClassNotFoundException e) { e.printStackTrace(); } catch(SQLException e){ e.printStackTrace(); } //關閉連接 finally{ if(conn!=null){ try{ conn.close(); }catch(SQLException e){ e.printStackTrace(); } } } } }

建立一個test case來驗證一下

import static org.junit.Assert.*; import java.sql.SQLException; import org.junit.Before; import org.junit.Test; public class JDBCTest { @Test public void test() throws ClassNotFoundException, SQLException { JDBCMySql jm = new JDBCMySql(); jm.operateMySql(); } }

執行結果

轉自：http://www.cnblogs.com/sweiqi/p/5936914.html；