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修改MYSQL root用户密码

风林 — Thu, 24 Feb 2011 02:40:00 GMT

mysqladmin -u root -p password haha
��root密码讄��为haha�Q�执行本命��o(h��)后，要求输入原root密码�Q�正��后�Q�即可修�Ҏ(gu��)��功�?

风林 2011-02-24 10:40 发表评论

常用数据库的JDBC�q�接代码

风林 — Wed, 24 Nov 2010 03:38:00 GMT

1、Oracle8/8i/9i数据库（thin模式�Q?/strong>
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
String url="jdbc:oracle:thin:@localhost:1521:orcl";
//orcl为数据库的SID
String user="test";
String password="test";
Connection conn= DriverManager.getConnection(url,user,password);
2、DB2数据�?/strong>
Class.forName("com.ibm.db2.jdbc.app.DB2Driver ").newInstance();
String url="jdbc:db2://localhost:5000/sample";
//sample��Z��的数据库�?nbsp;
String user="admin";
String password="";
Connection conn= DriverManager.getConnection(url,user,password);
3、Sql Server7.0/2000/2005数据�?nbsp;
/*使用的是4.0驱动�Q�此JAR包名�U�Cؓ(f��)sqljdbc4.jar�Q�文件大��ؓ(f��) 524 KB (537,303 字节) �Q�文件修�Ҏ(gu��)��间�ؓ(f��)‎2010‎�q?#8206;4‎�?#8206;19‎日，‏‎10:12:00*/
public static void main(String[] args) {
  String driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
  String url="jdbc:sqlserver://192.168.1.113:3329;DatabaseName=kinsys";
  String username="sa";
  String password="";

  Connection con = null;
  try{
   Class.forName(driverClassName);
   con = DriverManager.getConnection(url, username, password);
   System.out.println("Connection successed.");
  }catch(Exception e){
   e.printStackTrace();
  }
}
4、Sybase数据�?/strong>
Class.forName("com.sybase.jdbc.SybDriver").newInstance();
String url =" jdbc:sybase:Tds:localhost:5007/myDB";
//myDB��Z��的数据库�?nbsp;
Properties sysProps = System.getProperties();
SysProps.put("user","userid");
SysProps.put("password","user_password");
Connection conn= DriverManager.getConnection(url, SysProps);
5、Informix数据�?/strong>
Class.forName("com.informix.jdbc.IfxDriver").newInstance();
String url =
"jdbc:informix-sqli://123.45.67.89:1533/myDB:INFORMIXSERVER=myserver;
user=testuser;password=testpassword";
//myDB为数据库�?nbsp;
Connection conn= DriverManager.getConnection(url);
6、MySQL数据�?/span>
/*org.gjt.mm.mysql.Driver是早期的驱动名称�Q�后来就改名为com.mysql.jdbc.Driver�Q�现在一般都推荐使用 com.mysql.jdbc.Driver。在最新版本的mysql jdbc驱动中，��Z��(ji��n)保持对老版本的兼容�Q�仍然保留了(ji��n)org.gjt.mm.mysql.Driver�Q�但是实际上 org.gjt.mm.mysql.Driver中调用了(ji��n)com.mysql.jdbc.Driver�Q�因此现在这两个驱动没有什么区别�?/span>*/
Class.forName("com.mysql.jdbc.Driver").newInstance();
String url ="jdbc:mysql://localhost/myDB?user=soft&password=soft1234&useUnicode=true&characterEncoding=8859_1" //解决中文昄��问题
//myDB为数据库�?nbsp;
Connection conn= DriverManager.getConnection(url);
7、PostgreSQL数据�?/strong>
Class.forName("org.postgresql.Driver").newInstance();
String url ="jdbc:postgresql://localhost/myDB"
//myDB为数据库�?nbsp;
String user="myuser";
String password="mypassword";
Connection conn= DriverManager.getConnection(url,user,password);

风林 2010-11-24 11:38 发表评论

SSH&MySQL数据存取��q��

风林 — Thu, 18 Nov 2010 14:39:00 GMT
使用Hibernate向MySQL数据库里写了(ji��n)数据�Q�全是�ؕ码：(x��)

mysql> select * from tbl_Category;
+----+--------------------+--------------------+----------+
| id | descr              | name               | parentId |
+----+--------------------+--------------------+----------+
|  1 | �K��?????�K????       | �K��?????�K????       |     NULL |
|  2 | ????�K��??????       | ????�K��??????       |     NULL |
|  3 | ??�K?�K???????       | ??�K?�K???????       |     NULL |
|  4 | ???????�K????       | ???????�K????       |     NULL |
|  5 | ?�K��K��?�K??�K??       | ?�K��K��?�K??�K??       |     NULL |
|  6 | ?�K???????�K?�K?????? | ?�K???????�K?�K?????? |     NULL |
+----+--------------------+--------------------+----------+
6 rows in set (0.10 sec)

��Z��(ji��n)能处理Unicode�~�码�Q�最好将数据库库的编码设�|��ؓ(f��)UTF8(�q�样��可以不��是哪国文字都能正常昄��)�Q�连接时也用UTF8来处理。我们先查看当前数据的编码设�|�情况：(x��)

mysql> show variables like 'character_set_%';
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | latin1                     |
| character_set_connection | latin1                     |
| character_set_database   | utf8                       |
| character_set_filesystem | binary                     |
| character_set_results    | latin1                     |
| character_set_server     | latin1                     |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)
以上是未讄��前的�~�码情况�Q�通过以下命��o(h��)来设�|�编码：(x��)

mysql> set character_set_client=utf8;
Query OK, 0 rows affected (0.00 sec)
使用set命��o(h��)��相应的参数讄��相应的��|��误��׃��个一个设�|�，下面是设�|�好�?ji��n)的�?br>
mysql> show variables like 'character_set_%';
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8                       |
| character_set_connection | utf8                       |
| character_set_database   | utf8                       |
| character_set_filesystem | binary                     |
| character_set_results    | utf8                     |
| character_set_server     | utf8                       |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)
到此为止�Q�MySQL数据库编码被我们讄��好了(ji��n)�?br>在连接MySQL数据库时�Q��用如下连接串�Q?br>
jdbc.url=jdbc:mysql://192.168.1.114:3306/szblcz?useUnicode=true&characterEncoding=UTF-8
我这里是配置在一个Properties文�g里�?span style="COLOR: red; FONT-SIZE: 14pt">useUnicode=true&characterEncoding=UTF-8 �q�两个参数�v��C��(ji��n)臛_��重要的作用�?/span>
到这里一切再��试一下，应该没问题了(ji��n)�?

风林 2010-11-18 22:39 发表评论

Ubuntu下安装MySQL�Q��ƈ让远�E�客��L(f��ng)��讉K��

风林 — Tue, 02 Nov 2010 14:37:00 GMT
今天我的SQL Server2005在安装了(ji��n)Dot Net 4.0框架后，竟然用不�?ji��n)�?ji��n)�Q�打开我的虚拟机，启动Ubuntu�Q�不让我用Sql server,我就用MySQL�Q��?br>1、安装MySQL

要安�?MySQL�Q�可以在�l�端提示�W�后�q�行下列命��o(h��)�Q?/span>

sudo apt-get install mysql-server mysql-client #中途会(x��)让你输入一�ơroot用户密码

一旦安装完成，MySQL 服务器应该自动启动�?/span>

sudo start mysql #手动启动mysql

sudo stop mysql #手动停止mysql

当你修改�?ji��n)配�|�文件後�Q�你需要重�?mysqld 才能使这些修改生效�?/p> 2、修攚w��|�文�?/span>
修改/etc/mysql/my.cnf文�g�Q�将此文件中�?br>
bind-address = 192.168.1.10 #后面�q�个IP地址为MySQL服务器的IP地址
保存�q��出�?br>3、给�q�程客户端分配访问权�?/strong>
1�Q�在命��o(h��)行执行：(x��)

mysql -u root -p

(输入mysql的root密码)

2�Q�在命��o(h��)行执行以下命令，查看当前有哪些用��P��(x��)

mysql> use mysql;
mysql> select host,user,password from user;

3)�l�远�E�客��L(f��ng)��授权

mysql>grant all privileges on *.* to root@192.168.1.101 identified by 'password'

注意�Q?�Q?�Q?92.168.1.101是欲�q�接到此Mysql数据库的客户端的IP地址�Q�而不是Mysql数据库所在数据库服务器的IP地址�Q�切�?br>           �Q?�Q�password��是Mysql数据库root用户的password,�Ҏ(gu��)��实际情况需要修�?/span>

写了(ji��n)个程序测试下�Q�一切OK�Q?br>�?.0框架卸蝲�?ji��n)，再重启，SQL SERVER2005也可以正�怋�用了(ji��n)�Q�！�Q�！�Q?/span>

风林 2010-11-02 22:37 发表评论