centos7安装mysql并jdbc测试教程

yum安装mysql5.5

之前用rpm安装方式安装不成功，换成yum安装之后安装ok了，在网上搜索到很多的rmp安装和tar包安装的方式，但是是centos7.x与centos6.x做了很大的改变，可能别人的6.x不适合7.x的安装，尤其是对于像博主一样的新人来说，照搬教程可能导致安装不成功，如果你rmp安装失败，那么尝试跟着本教程来吧。

先卸载已经存在的MySQL。

 [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 -urootmysql> 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

测试jdbc

首先需要准备好jar包，mysql只需要一个jar包:mysql-connector-java-3.0.14-production-bin.jar，如果你是用vi/vim作为编辑工具，那么你的jar包需要放在jdk的lib文件夹下面，或者放在一个独立的地方，然后将其加入classpath里面，我在centos下面用ide eclipse来开发，这里以eclipse为例子说来(感觉自己在linux用ide，有点low).复制+粘帖，放在项目的lib下面。接着来开放我们的jdbc测试用例。

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?zeroDateTimeBehavior=convertToNull";      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();      }    }  }}

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