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MySql 主键返回使用(mysql中主键)

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本篇文章给大家谈谈MySql主键返回使用,以及mysql中主键的知识点,同时本文还将给你拓展Can''tconnecttolocalMySQLserverthroughsocket''/opt/lam

本篇文章给大家谈谈MySql 主键返回使用,以及mysql中主键的知识点,同时本文还将给你拓展Can''t connect to local MySQL server through socket ''/opt/lampp/var/mysql/mysql.sock'' (2)、Can''t connect to local MySQL server through socket ''/var/lib/mysql/mysql.sock''、CentOS yum安装mysql后 Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’、centos7 设置 mysql 自启动的配置文件中 [Service] User=mysql Group=mysql,user 和 group 这边的 mysql 是指的什么?centos 的登录用户名?等相关知识,希望对各位有所帮助,不要忘了收藏本站喔。

本文目录一览:

MySql 主键返回使用(mysql中主键)

MySql 主键返回使用(mysql中主键)

方法:1.sql 中加入:

<insert id="insertSelective" parameterType="domain.XwRole" useGeneratedKeys="true" keyProperty="id" keyColumn="id" >
    insert into t_xw_role
    <trim prefix="(" suffix=")" suffixOverrides="," >
      <if test="id != null" >
        id,
      </if>
      <if test="name != null" >
        name,
      </if>
      <if test="code != null" >
        code,
      </if>
      <if test="level != null" >
        level,
      </if>
      <if test="parent != null" >
        parent,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides="," >
      <if test="id != null" >
        #{id,jdbcType=INTEGER},
      </if>
      <if test="name != null" >
        #{name,jdbcType=VARCHAR},
      </if>
      <if test="code != null" >
        #{code,jdbcType=VARCHAR},
      </if>
      <if test="level != null" >
        #{level,jdbcType=INTEGER},
      </if>
      <if test="parent != null" >
        #{parent,jdbcType=VARCHAR},
      </if>
    </trim>
  </insert>

     2. 在 service 层接收返回的主键

        public int add(XwRoleVO xwRoleVo) {
        xwRoleVo.setCode(getCode(xwRoleVo));
        xwRoleM.insertSelective(xwRoleVo);
        return xwRoleVo.getId();
    }

方法 2 通过注解方式实现

    @Options(useGeneratedKeys = true, keyProperty = "id", keyColumn = "id")
    @Insert("INSERT INTO t_all_order (order_no, resident_id, total_amount, deduct_amount, "
            + "payable_amount, address_book_id, pay_status, deliver_status, "
            + "able_status,create_time,total_count,hang_msg,cancel_msg) "
            + "VALUES (#{orderNo}, #{residentId},  #{totalAmount}, #{deductAmount}, #{payableAmount}, "
            + "#{addressBookId}, #{payStatus}, #{deliverStatus}, #{ableStatus},"
            + "#{createTime},#{totalCount},#{hangMsg},#{cancelMsg});")
    public int insert(AllOrder allOrder);

在 service 层接收返回的主键

service 层也是绑定到插入的实体类上,同第一种方法里面的获取一样

 

 

Can''t connect to local MySQL server through socket ''/opt/lampp/var/mysql/mysql.sock'' (2)

Can''t connect to local MySQL server through socket ''/opt/lampp/var/mysql/mysql.sock'' (2)

ERROR 2002 (HY000): Can''t connect to local MySQL server through socket ''/opt/lampp/var/mysql/mysql.sock'' (2)

 

 

 

原因:系统盘满了

[root@localhost opt]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
18G 17G 0 100% /
tmpfs 504M 0 504M 0% /dev/shm
/dev/sda1 477M 80M 372M 18% /boot
[root@localhost opt]#

解决:

删除大文件后,重启系统解决

 

 

[root@localhost mysql]# /opt/lampp/lampp status
Version: XAMPP for Linux 1.8.3-3
Apache is not running.
MySQL is not running.
ProFTPD is running.

 

df: 未处理文件系统
[root@localhost opt]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
18G 17G 0 100% /
tmpfs 504M 0 504M 0% /dev/shm
/dev/sda1 477M 80M 372M 18% /boot
[root@localhost opt]#

 

 

[root@localhost ~]# /opt/lampp/lampp status
Version: XAMPP for Linux 1.8.3-3
Apache is not running.
MySQL is running.
ProFTPD is running.

 

 

 

xampp 无法启动mysql 找不到mysql.sock

  (2016-02-24 23:21:24)
转载
  分类: 技术
出现的问题:
如果xampp中的mysql启动不了,出现ERROR 2002 (HY000): Can''t connect to local MySQL server through socket ''/opt/lampp/var/mysql/mysql.sock'' (2)报错,
停止xampp的时候报:
-bash-4.1# /opt/lampp/lampp stop
Stopping XAMPP for Linux 1.8.2-6...
XAMPP: Stopping Apache...ok.
XAMPP: Stopping MySQL...ok.
XAMPP: Stopping ProFTPD...kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec]
fail.

解决办法:
如果网上一些方法不好用的话,可以试试以下方法:
1. 确定系统盘是否满了
#df -h
2. 删除/opt/lampp目录中的pid文件(删掉后xampp重启时会重建,如果不放心,可以先备份lampp目录)
删除mysql相关缓存:
#rm -rf /opt/lampp/var/mysql/VM_*  
删除proftp相关缓存:
#rm -rf /opt/lampp/var/proftpd.pid
如果找不到pid文件,可以搜一下:
#find /opt/lampp -name ''*.pid''

 

Can''t connect to local MySQL server through socket ''/var/lib/mysql/mysql.sock''

Can''t connect to local MySQL server through socket ''/var/lib/mysql/mysql.sock''

MySQL已经被我移到数据盘了,本地连接数据库会报错:Can''t connect to local MySQL server through socket ''/var/lib/mysql/mysql.sock''

但是远程是可以连接的,my.cnf设置mysql的根目录也改成了数据盘的地址,还要在加上client的参数,设置如下:

[client]
socket = /home/data/mysql/mysql.sock

之后重启下mysql就可以了

CentOS yum安装mysql后 Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’

CentOS yum安装mysql后 Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’

亲,是不是忘记了开MysqL服务,service MysqLd start

centos7 设置 mysql 自启动的配置文件中 [Service] User=mysql Group=mysql,user 和 group 这边的 mysql 是指的什么?centos 的登录用户名?

centos7 设置 mysql 自启动的配置文件中 [Service] User=mysql Group=mysql,user 和 group 这边的 mysql 是指的什么?centos 的登录用户名?

centos7 设置 mysql 自启动的配置文件中

[Unit]
Description=MySQL Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target

[Install]
WantedBy=multi-user.target

[Service]
User=mysql
Group=mysql
ExecStart=/usr/local/mysql/bin/mysqld --defaults-file=/etc/my.cnf
LimitNOFILE = 5000
#Restart=on-failure
#RestartPreventExitStatus=1
#PrivateTmp=false

这里的

[Service]

User=mysql

Group=mysql,

user 和 group 这边的 mysql 是指的什么?centos 的登录用户名?还是其他呢?

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