centos7安装mysql并jdbc测试实例详解

 [root@shizongger bin]# rpm -qa|grep mysql
 [root@shizongger bin]# rpm -qa mysql
 [root@shizongger bin]# rpm -qa|grep -i mysql
 MySQL-client-5.5.54-1.el7.x86_64
 [root@shizongger bin]# rpm -e --nodeps M
 ModemManager ModemManager-glib MySQL-client
 [root@shizongger bin]# rpm -e --nodeps MySQL-client

[root@shizongger bin]# wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
[root@shizongger bin]# rpm -ivh mysql-community-release-el7-5.noarch.rpm

[root@shizongger bin]# yum install mysql-community-server

[root@shizongger bin]# service mysqld start

[shizongger@shizongger src]$ netstat -anp |grep 3306
(Not all processes could be identified, non-owned process info will not be shown, you would have to be root to see it all.)
tcp6 0 0 :::3306 :::* LISTEN -

[root@shizongger bin]# mysql -uroot
mysql> set password for 'root'@'localhost' =password('root');
mysql>exit

  [root@shizongger bin]# mysql -uroot -proot
  mysql> show database;
  ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'database' at line 1
  mysql> show databases;
  +--------------------+
  | Database |
  +--------------------+
  | information_schema |
  | mysql |
  | performance_schema |
  +--------------------+

[root@shizongger bin]# service mysqld stop

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class JdbcTest {

  public static void main(String[] args) {
    Connection conn = null;
    Statement sm = null;
    ResultSet rs = null;

    try {
      Class.forName("com.mysql.jdbc.Driver");
      String url = "jdbc:mysql://localhost:3306/shopping";
      conn = DriverManager.getConnection(url, "root", "root");
      sm = conn.createStatement();
      rs = sm.executeQuery("select * from user");
      while(rs.next()) {
        System.out.println("id:" + rs.getInt("id") + " name:" + rs.getString("name"));
      }
    } catch (ClassNotFoundException e) {
      e.printStackTrace();
    } catch (SQLException e) {
      e.printStackTrace();
    } finally {
      try{
        if(rs != null) {
          rs.close();
          rs = null;
        }
        if(sm != null) {
          sm.close();
          sm = null;
        }
        if(conn != null) {
          conn.close();
          conn = null;
        }
      } catch(Exception e) {
        e.printStackTrace();
      }
    }

  }

}