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zhyiwww — Mon, 26 Jan 2015 07:16:00 GMT

在数据库操作中，我们�l�常会想向一个字�D�填充一个序列自增��|��一直没有想到好用的�Ҏ��?br />今天做了一个实验，果然可用。实现方法很��单�?br />
表定义：
desc test
名称     �I��?�c�d��
------ -- ------------
SEQ_ID    VARCHAR2(20)
A         VARCHAR2(20)

序列定义�Q?

   CREATE SEQUENCE "QYDB"."SEQ_ID" MINVALUE 1 MAXVALUE 999999999999999999999999999 INCREMENT BY 1 START WITH 41 CACHE 20 NOORDER NOCYCLE ;

操作�Q?br />select * from test;

�l�果�Q?br />

SEQ_ID	A
	1123
	12312
	uuu
	ioohh

执行操作�Q�update test set seq_id=SEQ_ID.nextval;

之后的结果：

SEQ_ID	A
36	1123
37	12312
38	uuu
39	ioohh

说明SEQ_ID字段已经�Ҏ��序列值更新�?br />

zhyiwww 2015-01-26 15:16 发表评论

zhyiwww — Thu, 01 Mar 2012 04:59:00 GMT

在本地登陆mysql

mysql -u root -p

�l�mysql root用户授权
mysql >grant all on *.* to root@’%’ identified by‘123456’ with grant option;

mysql > exit;

退�?重新��d��

mysql -h 192.168.1.40 -u root -p

能登录就可以�?

zhyiwww 2012-03-01 12:59 发表评论

MYSQL��q��问题

zhyiwww — Thu, 01 Mar 2012 02:41:00 GMT

mysql> use demodb;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql>

mysql> show variables like 'character\_set\_%';
+--------------------------+--------+
| Variable_name            | Value |
+--------------------------+--------+
| character_set_client     | latin1 |
| character_set_connection | latin1 |
| character_set_database   | latin1 |
| character_set_filesystem | binary |
| character_set_results    | latin1 |
| character_set_server     | latin1 |
| character_set_system     | utf8   |
+--------------------------+--------+
7 rows in set (0.00 sec)

mysql> set character_set_client=utf8;
Query OK, 0 rows affected (0.01 sec)

mysql> show variables like 'character\_set\_%';
+--------------------------+--------+
| Variable_name            | Value |
+--------------------------+--------+
| character_set_client     | utf8   |
| character_set_connection | latin1 |
| character_set_database   | latin1 |
| character_set_filesystem | binary |
| character_set_results    | latin1 |
| character_set_server     | latin1 |
| character_set_system     | utf8   |
+--------------------------+--------+
7 rows in set (0.00 sec)

mysql> select * from project;
+-------+------------+------+--------------+-------------+-----------+----------+--------------+--------+
| ID    | pname      | URL | LEAD         | DESCRIPTION | pkey      | pcounter | ASSIGNEETYPE | AVATAR |
+-------+------------+------+--------------+-------------+-----------+----------+--------------+--------+
| 10200 | demo       | NULL | aaa      | NULL        | DEMO      |      159 |            2 | 10011 |
| 10300 | demo2      | NULL | bbb | NULL        | DEMOTWO   |        1 |            2 | 10011 |
| 10302 | ??????     |      | ccc      |             | FFF        |        0 |            2 | 10011 |
| 10500 | ????       | NULL | aaa      | NULL        | QQQ       |       11 |            2 | 10011 |
| 10501 | SCRUM-???? | NULL | ddd      | NULL        | SFFF       |       24 |            2 | 10011 |
| 10502 | ??????     | NULL | eee      | NULL        | SSS       |        6 |            2 | 10011 |
| 10504 | ????       | NULL | fff      | NULL        | FINANCING |        2 |            2 | 10011 |
+-------+------------+------+--------------+-------------+-----------+----------+--------------+--------+
7 rows in set (0.00 sec)

mysql>

mysql> set character_set_connection=utf8;
Query OK, 0 rows affected (0.00 sec)

mysql> set character_set_database=utf8;
Query OK, 0 rows affected (0.00 sec)

mysql> set character_set_results=utf8;
Query OK, 0 rows affected (0.00 sec)

mysql> set character_set_server=utf8;
Query OK, 0 rows affected (0.00 sec)

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   |
+--------------------------+--------+
7 rows in set (0.00 sec)

mysql> select * from project;
+-------+--------------------+------+--------------+-------------+-----------+----------+--------------+--------+
| ID    | pname              | URL | LEAD         | DESCRIPTION | pkey      | pcounter | ASSIGNEETYPE | AVATAR |
+-------+--------------------+------+--------------+-------------+-----------+----------+--------------+--------+
| 10200 | demo               | NULL | aaa      | NULL        | DEMO      |      159 |            2 | 10011 |
| 10300 | demo2              | NULL | bbb | NULL        | DEMOTWO   |        1 |            2 | 10011 |
| 10302 | 实例��目需�?|      | ccc      |             | FFF        |        0 |            2 | 10011 |
| 10500 | 演示��目       | NULL | ddd      | NULL        | QQQ       |       11 |            2 | 10011 |
| 10501 | SCRUM-实例��目 | NULL | eee      | NULL        | SFFF       |       24 |            2 | 10011 |
| 10502 | 正式A需�?| NULL | fff      | NULL        | SSS       |        6 |            2 | 10011 |
| 10504 | 正式T       | NULL | ddd      | NULL        | FINANCING |        2 |            2 | 10011 |
+-------+--------------------+------+--------------+-------------+-----------+----------+--------------+--------+
7 rows in set (0.00 sec)

通过以上�q�程说明.仅仅通过set character_set_client=utf8;是不能解决�ؕ码问题的.解决��q��问题需要把mysql的服务器�~�码讄��成utf8,同时,创徏数据库的时候需要把数据库的�~�码讄��成utf8�~�码,才能解决mysql数据库查询�ؕ码问�?

如果数据库服务器的编码是utf8,而数据库的编码也是utf8,在客��L��查询出现��q��,基本上可以推断是客户端的讄��不是utf8�~�码.

数据库服务编码设�|�请参见mysql服务端编码设�|?

zhyiwww 2012-03-01 10:41 发表评论

zhyiwww — Wed, 21 Apr 2010 03:10:00 GMT

问题�Q?br /> 在��用oracle Blob字段存储大字�W�串�Ӟ��d��初来的字�W�串�l�常出现��q��问题�?br />
背景�Q?br /> 1.oracle数据库服务器�pȝ��使用的是UTF-8�~�码或者是AL32UTF8�~�码
2.在Web应用中已�l�将��h��~�码讄��为UTF-8�~�码
3二进制数据的取得
                    Blob blogObj = rst.getBlob("CONTENT");
                    if(blogObj!=null){
                        byte[] content = blogObj.getBytes(1, (int) blogObj.length());
                            try {
                                news.setContent(new String(content));
                            } catch (UnsupportedEncodingException e) {

                                e.printStackTrace();
                            }

                    }

��q��问题的解��x��法：
                                news.setContent(new String(content�Q?#8220;UTF-8”));

之后��׃��会出��Cؕ码问题�?br />

zhyiwww 2010-04-21 11:10 发表评论

zhyiwww — Wed, 22 Jul 2009 09:33:00 GMT

在Postgresql�?我想取得两个旉��的差��|��以秒为单位）�Q�方法如下：

        SELECT a.*, Extract( epoch from (a.start_time - '#ivr_start#')) as gap

        FROM ivr_detail_log a
        WHERE callerid = '#callerid#'
        AND
        abs(Extract( epoch from (a.start_time - '#ivr_start#')))<20

        ORDER BY id

zhyiwww 2009-07-22 17:33 发表评论

postgres数据导出和导入操作（备䆾和恢复）

zhyiwww — Wed, 15 Jul 2009 07:39:00 GMT

数据导出主要使用的工��h��pg_dump.
比如�Q�我惛_��出数据库baijing_app

$ pg_dump -f beijing_app.sql -C -v -d -h 192.168.1.15 -U postgres beijing_app

关于参数的意义，可以参阅
http://www.postgresql.org/docs/7.4/static/app-pgdump.html

$ psql -hlocalhost -U postgres -d aadb -f beijing.sql

zhyiwww 2009-07-15 15:39 发表评论

从csv格式导入数据到postgres

zhyiwww — Wed, 15 Jul 2009 06:14:00 GMT

功能�Q�把csv里面的数据导入到postgres数据库�?br />
实现步骤�Q?br />
(1)查看数据�Q�取得所有的字段名称

"ID","CALLID","CALLERID","CALLEDID","LOGTIME","ACTION_TYPE","ACTION_DES"
5829,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?4�U?"bbbbb",
5830,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?4�U?"aaaaa","1\116.kkkk"
5831,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?3�U?"aaaaa","1\142.kkkk"
5832,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?6�U?"aaaaa","1\141.kkkk"
5833,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?7�U?"aaaaa","1\116.kkkk"
5834,76881,cccccc,tttt,2009�q?7�?3�?9�?8�?7�U?"aaaaa","1\142.kkkk"

通过上面的字�D�名�U�和下面的数据，可以知道数据的字�D�名�U�和数据�c�d��?br />
(2)�Ҏ��字段名称和类型，写出创徏表的脚本

drop table aa_log ;

create table aa_log
(
    id int8,
    callid int8,
    callerid int8,
    calledid int8,
    logtime varchar(100),
    action_type varchar(100),
    action_des varchar(100)
);

脚本保存�?tmp/a.sql

(3)创徏数据�?br />
$ psql -hlocalhost -U postgres -d logdb -f /tmp/a.sql

执行�Q�创建数据表�?br />
(4)修改数据
上面的数据，字符串类型有"aaaaa" ,那么导入到数据库的时候，对应的��g��会有�W�号"aaaaa",所以，其值实际是""aaaaa"",��Z��避免�q�样�Q�我们要先把数据里面�?��L��?br />在vim里面,�?s/�?/g把所有的"�W�号替换掉�?br />
5829,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?4�U?bbbbb,
5830,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?4�U?aaaaa,1\116.kkkk
5831,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?3�U?aaaaa,1\142.kkkk
5832,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?6�U?aaaaa,1\141.kkkk
5833,76881,cccccc,tttt,2009�q?7�?3�?9�?7�?7�U?aaaaa,1\116.kkkk
5834,76881,cccccc,tttt,2009�q?7�?3�?9�?8�?7�U?aaaaa,1\142.kkkk

(5)删除title

把数据最上面的那行字�D�定义数据删除掉。否则会出现导入数据库错误�?br />

(6)导入数据
logdb=# copy aa_log from '/tmp/aa.csv' with delimiter ',';
COPY 273
logdb=#

(7)��查数�?br />
��x��Q�导入数据处理完毕�?br />

zhyiwww 2009-07-15 14:14 发表评论

zhyiwww — Wed, 15 Jul 2009 03:37:00 GMT

说明�Q?我的�pȝ��是debian5.0

默认�Q�mysql的配�|�是只允�总�localhost��d��Q�如果想从其他的��L��d��Q�就需要做一些工作了�?br />
(1)配置mysql

配置文�g�?etc/mysql/my.cnf

修改前的配置如下�Q?br />DEVSERVER:/etc/mysql# grep bind-address my.cnf
bind-address = 127.0.0.1
DEVSERVER:/etc/mysql#

修改后的配置如下�Q?br />DEVSERVER:/etc/mysql# grep bind-address my.cnf
#bind-address = 127.0.0.1
DEVSERVER:/etc/mysql#

也就是，把上面的那一行注释掉�?br />
重启服务�?br />#/etc/init.d/mysql restart

(2)重徏用户

# create user test identified by 'password';
# grant all on *.* to 'zy'@'%';

完成上面的两个步骤，��可以从其他的主机登录了�?br />
(3)��试

从我的机�?92.168.1.88�q�接192.168.1.99的mysql

$ mysql -h192.168.1.99 -u test -p
如果能成功登录，��p��明配�|�正��?br />

zhyiwww 2009-07-15 11:37 发表评论

Postgis的安装和配置

zhyiwww — Fri, 26 Jun 2009 08:55:00 GMT

把下面的代码存�ؓ install_postgis.sh
然后执行�?br />必须在postgres用户下执行�?br />

######################################################################
## install postgis on postgresql 8.3
##
## NOTICE:
## su to postgres user,then execute sh install_postgis.sh
##
######################################################################

dropdb postgis_template

createdb -T template1 postgis_template

createlang -d postgis_template plpgsql

cd /usr/share/postgresql-8.3-postgis

psql -d postgis_template -f lwpostgis.sql
psql -d postgis_template -f spatial_ref_sys.sql

psql -d postgis_template -c "GRANT ALL ON geometry_columns TO PUBLIC"
psql -d postgis_template -c "GRANT ALL ON spatial_ref_sys TO PUBLIC"

psql -d postgis_template -c "VACUUM FREEZE"

psql -l

zhyiwww 2009-06-26 16:55 发表评论

postgresql的安装和配置

zhyiwww — Fri, 26 Jun 2009 07:41:00 GMT

一般我们在安装postgres后，如果想用psql在控制台��d��的话�Q�是需要一炚w��|�的。主要有以下几步�Q?br />
(1)安装
aptitude install postgresql-8.3

(2)修改�pȝ��用户postgres的密�?br /> �q�个postgres是你的系�l�用戗��?br />$ su (成功�?
# passwd postgres

(3)用postgres用户��d��Q�修�Ҏ��据库用户postgres的密�?br />在postgres用户环境下，你已�l�可以用psql��d��
$ psql -h localhost -U postgres
postgres # alter user postgres password 'postgres';

(4)在其他用户下�Q�用psql��d��
XXX $ psql -hlocalhost -U postgres
��可以登录了

通过上面的配�|�，��可以在本机用所有的用户��d��了�?br />如果想通过其他的主机登录postgres数据库，�q�需要其他的配置�?br />
(5)打开监听,配置如下

配置�?br />root@zhangyi-desktop:/home/zhangyi# grep -i listen /etc/postgresql/8.3/main/postgresql.conf

# what IP address(es) to listen on;
listen_addresses = 'localhost'
# what IP address(es) to listen on;

root@zhangyi-desktop:/home/zhangyi#

配置�?br />root@zhangyi-desktop:/home/zhangyi# grep -i listen /etc/postgresql/8.3/main/postgresql.conf
listen_addresses = '*'
# what IP address(es) to listen on;
#listen_addresses = 'localhost'
# what IP address(es) to listen on;

root@zhangyi-desktop:/home/zhangyi#

(6)配置用户授权
vim /etc/postgresql/8.3/main/pg_hba.conf
��d��
host    all         all         192.168.1.0/24          md5

(7)重启postgres

# /etc/init.d/postgres restart

zhyiwww 2009-06-26 15:41 发表评论

postgres 插入timestamp�c�d��

zhyiwww — Mon, 08 Jun 2009 06:35:00 GMT

在JDBC中，我开始的��p�|的方案是�Q?br />
�Q?�Q?br />       buf.append(new java.sql.Timestamp(new Date().getTime()));
       buf.append(",");

�Q?�Q?br />                buf.append(new Date());
                buf.append(",");

(3)
               buf.append(new Timestamp(System.currentTimeMillis());
               buf.append(",");

(4)
                buf.append(new java.sql.Date(System.currentTimeMillis()));
                buf.append(",");

最后正��的�Ҏ��?br />
       buf.append("'");
       buf.append(new java.sql.Timestamp(new Date().getTime()));
       buf.append("'");
       buf.append(",");

zhyiwww 2009-06-08 14:35 发表评论

Postgres SQL学习

zhyiwww — Wed, 20 May 2009 09:37:00 GMT

学习时的一些脚本，记录下来�Q?br />

drop table user_orders;

create table user_orders (
    user_id int8 references userinfos(user_id),
    order_id int8 references orders(order_id)
);

drop table user_orders;

create table user_orders (
    user_id int8,
    order_id int8,
    foreign key (user_id) references userinfos(user_id),
    foreign key (order_id) references orders(order_id)
);
drop table partners;
create table partners
(
partner_id int8 primary key,
partner_name varchar(80)
);

drop table partner_tables;

create table partner_orders
(
    partner_id int8 references partners(partner_id),
    order_id int8 references orders(order_id),

    primary key (partner_id,order_id)

);

drop table prepaid_cards;

create table prepaid_cards
(
    prepaid_card_id int8 primary key,
    price float
)

drop table packages;

create table packages
(
package_id int8 primary key,
package_name varchar(80)
);

drop table package_cards;

create table package_cards
(
package_id int8 references packages(package_id),
prepaid_card_id int8 references prepaid_cards(prepaid_card_id),

primary key (package_id,prepaid_card_id)
);

drop table prepaid_cards;

create table prepaid_cards
(

    prepaid_card_id int8 primary key,
    prepaid_card_no varchar(30)

)

drop table order_detials;

create table order_detials
(
    order_id int8 references orders(order_id),
    package_id int8 references packages(package_id),
    count int4 ,
    primary key (order_id,package_id)
)

drop table aa;

create table aa
(
user_id int8 default nextval('seq_user_id') primary key ,
user_name varchar(40)
);

drop table category;

create table category
(
    category_id int8 primary key,
    parent_id int8 references category(category_id),
    category_name varchar(80)
);

drop sequence seq_category_id ;
create sequence seq_category_id increment 1 start 300000;

alter table category alter column category_id set default nextval('seq_category_id');

zhyiwww 2009-05-20 17:37 发表评论

创徏序列�q�绑定到字段

zhyiwww — Tue, 19 May 2009 05:59:00 GMT

(1)create sequence seq_user_id increment 1 start 20000;

(2)alter table userinfos alter column user_id set default nextval('seq_user_id');

(3)create table userinfos
(
user_id int8 default nextval('seq_user_id') primary key
user_name varchar(40)
)

zhyiwww 2009-05-19 13:59 发表评论

zhyiwww — Fri, 15 May 2009 03:47:00 GMT

SQL 如下�Q?br />�Q?�Q?br />
drop table user_orders;

create table user_orders (
        user_id int8 references userinfos(user_id),
        order_id int8 references orders(order_id)
);

�Q?�Q?br />
drop table user_orders;

create table user_orders (
        user_id int8,
        order_id int8,
        foreign key (user_id) references userinfos(user_id),
        foreign key (order_id) references orders(order_id)
);

�D�途同归�?br />

zhyiwww 2009-05-15 11:47 发表评论

database GUI admin tools on debian

zhyiwww — Tue, 20 Jan 2009 06:33:00 GMT

[1]postgresql GUI
aptitude install pgadmin3
[2]oracle GUI
aptitude install tora

[3]oracle GUI based on java
SQLDeveloper

[4]oracle GUI based java
squirrel(解压��p��?
http://www.squirrelsql.org/

zhyiwww 2009-01-20 14:33 发表评论

实战演练�Q�Hibernate映射Oracle的XmlType到Document(xml)对象

zhyiwww — Thu, 25 Dec 2008 10:08:00 GMT

先请参看上一��?/a>文章

[1]POJO
package com.csc.poimanager.dao;
import org.dom4j.Document;
public class XmlTest implements java.io.Serializable {
    private Long itemId;
    private Long poiId;
    private String itemName;
    private Document itemValue;
    public XmlTest() {
    }
    public XmlTest(String itemName) {
        this.itemName = itemName;
    }
    public Long getItemId() {
        return this.itemId;
    }
    public void setItemId(Long itemId) {
        this.itemId = itemId;
    }
    public Long getPoiId() {
        return this.poiId;
    }
    public void setPoiId(Long poiId) {
        this.poiId = poiId;
    }
    public String getItemName() {
        return this.itemName;
    }
    public void setItemName(String itemName) {
        this.itemName = itemName;
    }
    public Document getItemValue() {
        return this.itemValue;
    }
    public void setItemValue(Document itemValue) {
        this.itemValue = itemValue;
    }
}

[2]自定义映��类�?br />package com.csc.poimanager.dao.type;
import java.io.Serializable;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import oracle.jdbc.OraclePreparedStatement;
import oracle.jdbc.OracleTypes;
import oracle.jdbc.driver.OracleResultSet;
import oracle.sql.OPAQUE;
import oracle.xdb.XMLType;
import org.dom4j.Document;
import org.hibernate.HibernateException;
import org.hibernate.usertype.UserType;
import com.csc.poimanager.util.XmlUtil;
public class PoiAdditionalXmlType implements UserType, Serializable {
    private static final Class returnedClass = String.class; // 属性的java�c�d��
    private static final int[] SQL_TYPES = new int[] { oracle.xdb.XMLType._SQL_TYPECODE }; // 数据中类�?br />    public int[] sqlTypes() {
        return SQL_TYPES;
    }
    public Class returnedClass() {
        return returnedClass;
    }
    public boolean equals(Object arg0, Object arg1) throws HibernateException {
        if (arg0 == null || arg1 == null) {
            throw new HibernateException("None of the arguments can be null.");
        }
        if (arg0 instanceof oracle.xdb.XMLType
                && arg1 instanceof oracle.xdb.XMLType) {
            return arg0.equals(arg1);
        }
        return false;
    }
    public int hashCode(Object arg0) throws HibernateException {
        return 0;
    }
    public Object nullSafeGet(ResultSet rs, String[] names, Object arg2)
            throws HibernateException, SQLException {
           XMLType xmlType = null;
              Document doc = null;
              try {
                 OPAQUE value = null;
                 OracleResultSet ors = null;
                 if (rs instanceof OracleResultSet) {
                    ors = (OracleResultSet)rs;
                 } else {
                    throw new UnsupportedOperationException("ResultSet needs to be of type OracleResultSet");
                 }
                 value = ors.getOPAQUE(names[0]);
                 xmlType = XMLType.createXML(value);
                 Clob xmlClob = xmlType.getClobVal();
                 doc = XmlUtil.create(xmlClob.getCharacterStream());
              }finally {
                 if (null != xmlType) {
                    xmlType.close();
                 }
              }
              return doc;
    }
    public void nullSafeSet(PreparedStatement stmt, Object value, int index)
            throws HibernateException, SQLException {
          XMLType xmlType = null;
          try {
             //If the value is null then set NULL and return
             if (null == value) {
                stmt.setNull(index, OracleTypes.OPAQUE, "SYS.XMLTYPE");
                return;
             }
             if (stmt instanceof OraclePreparedStatement) {
                xmlType = XMLType.createXML(stmt.getConnection(), XmlUtil.toPlanString((Document)value));
                OraclePreparedStatement oracleStmt = (OraclePreparedStatement)stmt;
                oracleStmt.setObject(index, xmlType);
             }else {
                throw new HibernateException("PreparedStatement object must be a OraclePreparedStatement");
             }
          }finally {
             if (null != xmlType) {
                xmlType.close();
             }
          }
    }
    public Object deepCopy(Object value) throws HibernateException {
        return value;
    }
    public boolean isMutable() {
        return false;
    }
    public Serializable disassemble(Object arg0) throws HibernateException {
        return null;
    }
    public Object assemble(Serializable arg0, Object arg1)
            throws HibernateException {
        return null;
    }
    public Object replace(Object arg0, Object arg1, Object arg2)
            throws HibernateException {
        return null;
    }
}

[3]映射文�g

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

[4]XmlUtil定义
/**
*
*/
package com.csc.poimanager.util;

import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentFactory;
import org.dom4j.io.DOMWriter;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

/**
* @author zhangyi
*
*/
public class XmlUtil {

    public static Document create() {
        Document doc = null;
        doc = DocumentFactory.getInstance().createDocument();

        return doc;
    }

    public static Document create(String xmlString) {

        StringReader source = new StringReader(xmlString);

        return create(source);
    }

    public static Document create(Reader sourceReader) {

        SAXReader reader = new SAXReader();
        Document doc = null;
        try {
            doc = reader.read(sourceReader);
            doc.setXMLEncoding("UTF-8");
        } catch (DocumentException e) {
            e.printStackTrace();
        }

        return doc;
    }

    /**
    * get xml document text
    *
    * @param xmlDoc
    * @return
    */
    public static String toPlanString(Document xmlDoc) {

        StringWriter destWriter = new StringWriter();

        XMLWriter writer = new XMLWriter(destWriter,OutputFormat.createPrettyPrint());

        try {
            writer.write(xmlDoc);

        } catch (IOException e) {
            e.printStackTrace();
        }

        String xmlStr = destWriter.getBuffer().toString();

        return xmlStr;
    }



}

[5]实现insert

        XmlTest xt = new XmlTest();
        xt.setItemName("sfsdfsfsdfds");
        xt.setItemValue(XmlUtil.create("zhang yi ass"));


        XmlTestDAO xtdao = new XmlTestDAO();
        Session sess = xtdao.getSession();
        Transaction tx = sess.beginTransaction();

        xtdao.save(xt);

        tx.commit();
        sess.close();

        System.out.println("saving xmltest ok ");

        执行�l�果�Q?br />        saving xmltest ok

[6]实现查询
                XmlTestDAO xtdao = new XmlTestDAO();
        Session sess = xtdao.getSession();
        Transaction tx = sess.beginTransaction();
        XmlTest xt =xtdao.findById((long)9);

        System.out.println("xt item_value : " + xt.getItemName());
        System.out.println("xt item_value : " + xt.getItemValue());
        System.out.println("xt item_value : " + xt.getItemValue().getRootElement().getName());

        tx.commit();
        sess.close();

        System.out.println("getting xmltest ok ");

        �l�果如下�Q?br />        xt item_value : sfsdfsfsdfds
        xt item_value : org.dom4j.tree.DefaultDocument@4ee70b [Document: name null]
        xt item_value : a
        getting xmltest ok

        xt.getItemValue()取得的值是一个org.dom4j.Document对象�Q�这��P��可以用dom4j的东西去实现你要的所有的操作。所以，所有的东西��只有对象，而不需要，去考虑操作XmlType的东西了�?br />

[7]�ȝ��
      我觉得值得说的隄��有两个，一个是自定义类型里面的nullSafeSet和nullSafeGet�Ҏ��Q�另一个是映射的时候，要根据你nullSafeGet的返回值的�c�d��来确定�?br />      一定注意，映射的不是你的自定义�c�d��的对象，如上面的PoiAdditionalXmlType,而是你的解析后的对象org.dom4j.Document�?/font>

zhyiwww 2008-12-25 18:08 发表评论

zhyiwww — Thu, 25 Dec 2008 07:43:00 GMT

[1]表结�?br /> CREATE TABLE "POI_BEIJING"."XML_TEST"
   (
    "ITEM_ID" NUMBER(10,0) NOT NULL ENABLE,
    "ITEM_NAME" VARCHAR2(255 BYTE),
    "ITEM_VALUE" "SYS"."XMLTYPE" ,
    }
[2]自定义类型（参考网上资料）
参考了此老兄的思�\http://blog.csdn.net/wmbb/archive/2006/08/10/1045742.aspx
package com.csc.poimanager.dao.type;
import java.io.Serializable;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import oracle.jdbc.driver.OracleResultSet;
import oracle.sql.OPAQUE;
import org.hibernate.HibernateException;
import org.hibernate.usertype.UserType;
public class PoiAdditionalXmlType implements UserType, Serializable {
    private static final Class returnedClass = String.class;
    private static final int[] SQL_TYPES = new int[] { oracle.xdb.XMLType._SQL_TYPECODE };
    public int[] sqlTypes() {
        return SQL_TYPES;
    }
    public Class returnedClass() {
        return returnedClass;
    }
    public boolean equals(Object arg0, Object arg1) throws HibernateException {
        if (arg0 == null || arg1 == null) {
            throw new HibernateException("None of the arguments can be null.");
        }
        if (arg0 instanceof oracle.xdb.XMLType
                && arg1 instanceof oracle.xdb.XMLType) {
            return arg0.equals(arg1);
        }
        return false;
    }
    public int hashCode(Object arg0) throws HibernateException {
        return 0;
    }
    public Object nullSafeGet(ResultSet rs, String[] names, Object arg2)
            throws HibernateException, SQLException {
        OracleResultSet ors = (OracleResultSet) rs;
        OPAQUE op = ors.getOPAQUE(names[0]);
        oracle.xdb.XMLType xt = oracle.xdb.XMLType.createXML(op);
        return xt.getStringVal();
    }
    public void nullSafeSet(PreparedStatement st, Object value, int index)
            throws HibernateException, SQLException {
        Connection conn = st.getConnection();
        OPAQUE aClob = oracle.xdb.XMLType.createXML(conn, (String) value);
        st.setObject(index, aClob);
    }
    public Object deepCopy(Object value) throws HibernateException {
        return value;
    }
    public boolean isMutable() {
        return false;
    }
    public Serializable disassemble(Object arg0) throws HibernateException {
        return null;
    }
    public Object assemble(Serializable arg0, Object arg1)
            throws HibernateException {
        return null;
    }
    public Object replace(Object arg0, Object arg1, Object arg2)
            throws HibernateException {
        return null;
    }
}

[3]POJO
package com.csc.poimanager.dao;
import com.csc.poimanager.dao.type.PoiAdditionalXmlType;
public class XmlTest implements java.io.Serializable {
    private Long itemId;
    private Long poiId;
    private String itemName;
    private String itemValue;
    public XmlTest() {
    }
    public XmlTest(String itemName) {
        this.itemName = itemName;
    }
    public Long getItemId() {
        return this.itemId;
    }
    public void setItemId(Long itemId) {
        this.itemId = itemId;
    }
    public Long getPoiId() {
        return this.poiId;
    }
    public void setPoiId(Long poiId) {
        this.poiId = poiId;
    }
    public String getItemName() {
        return this.itemName;
    }
    public void setItemName(String itemName) {
        this.itemName = itemName;
    }
    public String getItemValue() {
        return this.itemValue;
    }
    public void setItemValue(String itemValue) {
        this.itemValue = itemValue;
    }
}

[4]映射文�g

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

[5]查询操作
        XmlTestDAO xtdao = new XmlTestDAO();
        Session sess = xtdao.getSession();
        Transaction tx = sess.beginTransaction();

        XmlTest xt =xtdao.findById((long)1);

//        xtdao.save(xt);

        System.out.println("xt item_value : " + xt.getItemName());
        System.out.println("xt item_value : " + xt.getItemValue());


        tx.commit();
        sess.close();

        System.out.println("getting xmltest ok ");
   执行�l�果
        xt item_value : WIFI
        xt item_value :
                                Yes
        getting xmltest ok

[6]插入操作
           XmlTestDAO xtdao = new XmlTestDAO();
        Session sess = xtdao.getSession();
        Transaction tx = sess.beginTransaction();

XmlTest xt =xtdao.findById((long)1);
        System.out.println("xt item_value : " + xt.getItemName());
        System.out.println("xt item_value : " + xt.getItemValue());
        tx.commit();
        sess.close();
        System.out.println("getting xmltest ok ");
执行�l�果�Q?br /> saving xmltest ok

[8]注意
   (1)oracle的XmlType不是字符�Ԍ��是oracle的一�U�数据类型，��像varchar一�?br />   (2)POJO中的itemValue�c�d��是由你的自定义类解析后的对象�c�d��
      比如上面的实玎ͼ�是把XmlType对象解析成xml的串�Q�是字符串类型。所以在POJO中的定义是String�c�d��Q�而不是PoiAdditionalXmlTyp�c�d��
   (3)此处仅实��C��把oracle中XmlType的��D��析成string�Ԍ��同时�Q�可以把xml的string串保存到XmlType�c�d��的字�D�里�?br />

zhyiwww 2008-12-25 15:43 发表评论

在hibernate中动态切换Schema

zhyiwww — Wed, 24 Dec 2008 10:24:00 GMT

如果你在调用hibernate的时候需要切换scheme怎么办呢�?br />在oracle中，不同的用��P��使用不同的schema.在hibernate的POJO中，会指定了schema

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

    schema="P_BEIJING">

上面的代码部分，��指定了Schema.
如果在操作的时候想切换Schema.操作如下�Q?br />
默认的配�|?br /> POI_BEIJING

上面的映��文件改为：

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

在操作的�Q�可以用下面的方法来重新build你的SessionFactory
public static void rebuildSessionFactoryForChangeSchema(String newSchema){
        try {

            Properties p = configuration.getProperties();
            System.out.println("---" + p);
            p.put("hibernate.default_schema", newSchema);
            sessionFactory = configuration.buildSessionFactory();
            System.out.println(" change schema successfully ......... ");
        } catch (Exception e) {
            System.err
                    .println("%%%% rebuild session factory failed for changing schema %%%%");
            e.printStackTrace();
        }
    }

如果需要改变Schema,��需要在需要的时候调用此�Ҏ��

比如在SchemaAction中，

       HibernateSessionFactory.rebuildSessionFactoryForChangeSchema("POI_SHANGHAI");

        System.out.println(" change successfully ---");



        PoiDAO pd = new PoiDAO();
        Transaction t =pd.getSession().beginTransaction();

        pd.save(new Poi("jsfjksdf"));
        t.commit();

   那么�Q�原来，是向POI_BEIJING中插入数据的�Q�变成了向POI_SHANGHAI中插入一条数据了�?br />
通过�q�种�Ҏ��Q�可以实现在操作不同的Schema的时候实现切换�?br />
问题�Q?br /> 此处改变的是静态工厂。所以，会对所有的用户产生影响。如果不惛_��所有的用户改变�Q�那么可以根据Schema的名�U�来取得自己对应的SessionFactoy��可以了�?br />

zhyiwww 2008-12-24 18:24 发表评论

not not run oracle as service automaticly when debian startup

zhyiwww — Sun, 21 Dec 2008 02:24:00 GMT

after install oracle under debian
using
/etc/init.d/oracle-xe configure
to config the oracle system on debian as a server on debian.
so when you restart you debian,the oracle system will startup automaticly
if you don't hope this,you could do as following:

vim /etc/default/oracle-xe
change
ORACLE_DBENABLED=true
to
ORACLE_DBENABLED=false
reboot your debian,it's ok.

zhyiwww 2008-12-21 10:24 发表评论

Install oracle udner debian

zhyiwww — Sat, 20 Dec 2008 11:23:00 GMT

[1]add source url to /etc/apt/sources.list
deb http://oss.oracle.com/debian unstable main non-free

[2]import key
wget http://oss.oracle.com/el4/RPM-GPG-KEY-oracle -O- | sudo apt-key add -

[3]apt-get update && apt-get install oracle-xe

zhyiwww 2008-12-20 19:23 发表评论

启动和关闭Oracle脚本

zhyiwww — Wed, 19 Nov 2008 08:14:00 GMT

Oracle在启动的时候会用掉很多的内存，所以，通常情况下我们都把其服务关闭�Q�在用的时候再启动。一般一个oracle实例都会�?个服务在启动�Q�所以，我们如果一个一个启动的话，很麻烦，所以，下面��是一个启动的脚本�?br />把下面的代码存成一个startoracle.bat文�g�Q�想启动的时候，执行一下就可以了�?br />
sc start OracleServiceORCL
sc start OracleDBConsoleorcl
sc start OracleJobSchedulerORCL
sc start OracleOraDb10g_home1iSQL*Plus
sc start OracleOraDb10g_home1TNSListener

关闭也一��P��把如下的代码存成一个stoporacle.bat�Q�想关闭的时候，执行一下就可以了�?br />
sc stop OracleDBConsoleorcl
sc stop OracleJobSchedulerORCL
sc stop OracleOraDb10g_home1iSQL*Plus
sc stop OracleOraDb10g_home1TNSListener
sc stop OracleServiceORCL

zhyiwww 2008-11-19 16:14 发表评论

Oracle导出导入树据

zhyiwww — Mon, 17 Nov 2008 07:53:00 GMT

在oracle,使用exp命��o来实现数据的导出�?br />(1)如何查看exp的帮�?br />   exp help=y
(2)导出所有库对象
   EXP USERNAME/PASSWORD FULL=Y FILE=C:\ORCL.DMP BUFFER=64000
(3导出某个用户的所有对�?br />   EXP USERNAME/PASSWORD FILE=C:\ORCL_ZZ.DMP BUFFER=64000 OWNER=USERNAME
(4)导出用户的某个表数据
   EXP USERNAME/PASSWORD FILE=C:\ORCL_ZZ_BEIJING.DMP BUFFER=64000 OWNER=USERNAME TABLES=(BEIJING)

如果只想导出数据库的表结构，那么��d��参数 ROWS=N ��可以了�?br />
数据导入使用IMP命��o
(1)查看IMP帮助
　IMP HELP=Y
(2)导入数据
IMP XXXXX/PASSWORD FILE=C:\TMP\XXXX.DMP BUFFER=64000 FROMUSER=USER_A TOUSER=USER_B
在执行之前，要保证USER_B要有以下权限

CONNECT
IMP_FULL_DATABASE
RESOURCE

其他导出工具�Ҏ��
(1)可以使用oracle developer把数据结构导出成SQL scripts
(2)可以通过EMS for Oracle实现数据或者库�l�构的导出�?br />

zhyiwww 2008-11-17 15:53 发表评论

zhyiwww — Mon, 17 Nov 2008 05:13:00 GMT

两种办法
[1]在命令行用dropdb命��o删除
   dropdb -U postgres demodb,��可以实现数据库的删�?br />[2]在psql命��o行下删除
   psql#DROP DATABASE demodb
   执行��可以删除�?br />   注意�Q�蓝色字体部分一定要用大写，不然�Q�命令就不能成功执行的�?

zhyiwww 2008-11-17 13:13 发表评论

zhyiwww — Mon, 17 Nov 2008 04:05:00 GMT

用postgres 的pg_dump可以实现从从postgres数据库中导出数据�?br />[1]只导出所有对象的数据库结�?br />   C:\>pg_dump -f DDDDDD.sql -i -C -E UTF8 -n public -s -U portal -h localhost -W portal
   -i 是�ؓ了兼�Ҏ��据库版本
   -C 包括创徏数据库的语句
   -E 讑֮�导出数据的编�?br />   -n 是Scheme的名�U?br />   -U 是用户名�U?br />   -h 是数据库服务器的名称
   -W 是用强制密码验证

   -s 只导出数据库�l�构

   最后一个参敎ͼ�当然��是数据库名�U�C��

[2]导出所有对象的数据库结构和数据
   C:\>pg_dump -f DDDDDD.sql -i -C -E UTF8 -n public -U portal -h localhost -W portal
   没有-s参数
[3]只导出所有的表数�?br />   C:\>pg_dump -f DDDDDD.sql -i -a -C -E UTF8 -n public -U portal -h localhost -W portal
   -a 只导出数�?br />数据导入
[1]c:\psql -f DDDDDD.sql -h 192.168.1.233 -U myuser -W myportal
   执行��可以实现导入了�?br />   如果数据库myportal 不存在，要先创徏数据�?br />   createdb -U postgres -h 192.168.1.233 myportal
   然后再执行上面的导入语句��可以了�?br />[2]psql -hlocalhost -U myuser -d myportal < DDDDDD.sql
   执行语句导入数据��可以了�?br />

zhyiwww 2008-11-17 12:05 发表评论

如何在sqlplus中执行sql脚本

zhyiwww — Fri, 14 Nov 2008 09:11:00 GMT

在sqlplus执行SQL脚本其实也很��?br />[1]登陆Sqlplus
c:\shp>sqlplus scott/passwort@orcl
成功后，可以执行导入
[2]执行@ c:\shp\beijing_region.shp
　如果是在linux��执行start /tmp/shp/beijing_region.shp
你就可以看到提示执行的结�?br />

SQL> @ c:\shp\beijing_region.sql

表已删除�?br />

表已创徏�?br />

已删�?1 行�?br />

已创�?1 行�?br />

提交完成�?br />
SQL>

zhyiwww 2008-11-14 17:11 发表评论

通过mapinfo的easyloader把shp数据导入到oracle

zhyiwww — Wed, 12 Nov 2008 08:03:00 GMT

[1]在mapinfo中打开shp文�g�Q��ƈ保存成tab文�g
[2]打开easyloader工具�Q?br />打开eaayloader

[3]配置数据源，到oracle spatial的连�?br />
注意�Q�用戯��有��够的权限�Q�能够创建Map Catalog

[4]导入数据

zhyiwww 2008-11-12 16:03 发表评论

oracle用户��理

zhyiwww — Wed, 12 Nov 2008 06:34:00 GMT

[1]创徏删除用户
   create user usera identified by password;
   drop user usera;
   // 创徏用户�Q�锁定状�?br />   create user userb identified by password account lock;

zhyiwww 2008-11-12 14:34 发表评论

把shp格式的数据导入到oracle

zhyiwww — Wed, 12 Nov 2008 06:06:00 GMT

[1]利用shp2sdo把shp格式的数据�{换成oracle能够识别的数据格式，利用下面的工�?br />shp2sdo -o c:\tmp\beijing\beijing_polyline c:\oracle_sql\beijng_polyline -s 4326

c:\tmp\beijing\beijing_polyline 是你的shp文�g
c:\oracle_sql\beijng_polyline 是你要生成的目标文�g

命��o成功执行后，会生成三个文�?br />c:\oracle_sql\beijng_polyline.sql
c:\oracle_sql\beijng_polyline.dat
c:\oracle_sql\beijng_polyline.ctl

[2]修改文�g
原始的beijng_polyline.ctl文�g�?br />LOAD DATA CHARACTERSET UTF8
INFILE c:\oracle_sql\beijng_polyline.dat
TRUNCATE
CONTINUEIF NEXT(1:1) = '#'
INTO TABLE BEIJNG_POLYLINE
FIELDS TERMINATED BY '|'
TRAILING NULLCOLS (
   MAPID     NULLIF MAPID = BLANKS,
   ID     NULLIF ID = BLANKS,
   KIND     NULLIF KIND = BLANKS,
   GEOM COLUMN OBJECT
   (
     SDO_GTYPE       INTEGER EXTERNAL,
     SDO_SRID        INTEGER EXTERNAL,
     SDO_ELEM_INFO   VARRAY TERMINATED BY '|/'
       (X            FLOAT EXTERNAL),
     SDO_ORDINATES   VARRAY TERMINATED BY '|/'
       (X            FLOAT EXTERNAL)
   )
)
我修改后的文件是

LOAD DATA CHARACTERSET UTF8�Q�这个地�Ҏ��讄��~�码�Q?br /> INFILE beijng_polyline.dat�Q�这个地方很重要�Q�一定要把�\径去掉，否则的话��L��有错误）
TRUNCATE
CONTINUEIF NEXT(1:1) = '#'
INTO TABLE BEIJNG_POLYLINE
FIELDS TERMINATED BY '|'
TRAILING NULLCOLS (
   MAPID     NULLIF MAPID = BLANKS,
   ID     NULLIF ID = BLANKS,
   KIND     NULLIF KIND = BLANKS,
   GEOM COLUMN OBJECT
   (
     SDO_GTYPE       INTEGER EXTERNAL,
     SDO_SRID        INTEGER EXTERNAL,
     SDO_ELEM_INFO   VARRAY TERMINATED BY '|/'
       (X            FLOAT EXTERNAL),
     SDO_ORDINATES   VARRAY TERMINATED BY '|/'
       (X            FLOAT EXTERNAL)
   )
)

[3]执行导入
在命令行下，改变目录到数据所在的目录�Q�如
c:\oracle_sql\
然后执行
sqlldr zy/password@orcl beijing_polyline
��可以了�Q�如果成功，��׃��出现如图所�C�的�l�果

zhyiwww 2008-11-12 14:06 发表评论

zhyiwww — Fri, 07 Nov 2008 05:32:00 GMT

[1]创徏普通烦�?br />   CRREATE INDEX idx_beijing_polyline_mapid ON beijing_polyline(mapid);
[2]创徏�I�间数据索引
   CREATE INDEX idx_beijing_polyline_geom ON beijing_polyline USING GIST(the_geom);
   需要先安装postgis支持�?br />

zhyiwww 2008-11-07 13:32 发表评论

zhyiwww — Fri, 07 Nov 2008 04:10:00 GMT

[1]创徏一个目录，用于你的表空��_��?c:\demospace
[2]修改该目录的权限�Q�让该表�I�间的所有者用��h��写的权限
如，你创��I�间的用��h��postgres,那么�Q�在修改此目录的控制权限的时�?img src="http://www.tkk7.com/images/blogjava_net/zhyiwww/postgres/postgres_create_tablespace.PNG" alt="postgres_create_tablespace.PNG" border="0" width="526" height="570" />
在此�Q�我的设�|�，是把Users�l�的用户都有写的权限�?br />
[3]在psql下执行CREATE TABLESPACE demospace LOCATION "c:/demospace";
��可以了�?br />如果没有�W�二步的权限配置�Q�会有如下的错误�Q?br />

zhyiwww 2008-11-07 12:10 发表评论