aimyxmu

隨筆 - 23 文章 - 3 trackbacks - 0

2006年6月

>

日

一

二

三

四

五

六

28

29

30

31

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

1

2

3

4

5

6

7

8

常用鏈接

留言簿(1)

隨筆檔案

搜索

閱讀排行榜

評論排行榜

2006年6月26日

writer

注意writer的參數有多個,特別是有一個boolean的參數決定刷新或在附加文本

????????????log? = ?? new ?PrintWriter( new ?FileOutputStream(fl, true ), true );
????????????SimpleDateFormat?df? = ? new ?SimpleDateFormat( " yyyy.MM.dd?'at'?hh:mm:ss\n " );
????????????Date?now? = ? new ?Date();
????????????String?dateformat? = ?df.format(now)
????????????BufferedWriter?bf?? = ? new ?BufferedWriter( new ?FileWriter(fl,? true ));
????????????bf.append(dateformat);
????????????bf.close();
????????????log.println( " start?connection?databse: " );
????????????log.println( " driver?name: " .concat(driveName);

輸出的結果示例:

2006.12.12?at?10:21:13

start?connection?databse:

driver?name:oracle.jdbc.driver.OracleDriver

posted @ 2006-12-12 12:16 aimy 閱讀(221) | 評論 (0) | 編輯收藏

工作流的錯誤

1、org.hibernate.ObjectNotFoundException: No row with the given identifier exists: [com.xindeco.business.pojo.NonageRegister#82]
?at org.hibernate.ObjectNotFoundException.throwIfNull(ObjectNotFoundException.java:27)
?at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:65)
?at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(ApplicationFilterChain.java:252)
?at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
?at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
?at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
?at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
?at org.apache.catalina.core.ApplicationDispatcher.forward

錯誤的原因：
在nonregsiter中已經手動刪除了id=‘82’的記錄，而在WF_task以及wf-proces中還有bizclass = '3' && bizId = '82'的記錄,只要刪除wf-task中相應的記錄.

posted @ 2006-07-09 16:17 aimy 閱讀(232) | 評論 (0) | 編輯收藏

WF_Process—理解

ProcessInstance.hbm.xml：

<? xml?version = " 1.0 " ?encoding = " UTF-8 " ?>

<! DOCTYPE?hibernate - mapping?PUBLIC

???? " -//Hibernate/Hibernate?Mapping?DTD?3.0//EN " ?

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

< hibernate - mapping

>

???? < class

????????name = " com.xindeco.workflow.ProcessInstance "

????????table = " WF_PROCESS "

????????dynamic - update = " true "

????????dynamic - insert = " true "

????????select - before - update = " false "

????????optimistic - lock = " version "

???? >

???????? < id

????????????name = " ID "

????????????column = " ID "

????????????type = " long "

????????????length = " 30 "

???????? >

???????????? < generator? class = " native " >

???????????? </ generator >

???????? </ id >

???????? < discriminator

????????????column = " bizClass "

????????????type = " string "

???????? />

????????

???????? < property

????????????name = " state "

????????????type = " java.lang.Integer "

????????????update = " true "

????????????insert = " true "

????????????access = " property "

????????????column = " state "

????????????length = " 10 "

???????? />

????????

???????? < many - to - one

????????????name = " flow "

???????????? class = " com.xindeco.workflow.WFFlow "

????????????cascade = " none "

????????????outer - join = " auto "

????????????update = " true "

????????????insert = " true "

????????????access = " property "

????????????column = " flowId "

???????? />

???????? < set

????????????name = " tasks "

????????????lazy = " true "

????????????inverse = " true "

????????????cascade = " delete "

????????????sort = " unsorted "

???????? >

?????????????? < key

??????????????????column = " processId "

?????????????? >

?????????????? </ key >

?????????????? < one - to - many

?????????????????? class = " com.xindeco.workflow.WFTask "

?????????????? />

???????? </ set >

???? </ class >

</ hibernate - mapping >

CollRegPI.hbm.xml：

<?xml?version="1.0"?>

<!DOCTYPE?hibernate-mapping?PUBLIC

??????"-//Hibernate/Hibernate?Mapping?DTD?3.0//EN"

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

<hibernate-mapping?default-access="field"?>

??<subclass?name="com.xindeco.business.pojo.wf.CollRegPI"

????????????discriminator-value="2"

????????????extends="com.xindeco.workflow.ProcessInstance"

????????????lazy="false">

????????????<many-to-one?name="collReg"

?????????????????class="com.xindeco.business.pojo.CollReg"

?????????????????column="bizId"

?????????????????cascade="none"/>

</subclass>

</hibernate-mapping>

數據庫的數據：

???? id??? flowid????bizId???bizClass???state
??21????? ?2????????? ?9 ???????? 2???????? ???? 0
?22???????? 2???????? 10???????? 2???????????? ?0
?23???????? 2???????? 11???????? 2??????????????0
?24???????? 2???????? 12???????? 2????????????? 0
?25???????? 2???????? 13???????? 2????????????? 0
?26???????? 2???????? 14???????? 2????????????? 0
?29???????? 2???????? 17???????? 2???????????? ?0
?30???????? 2???????? 18???????? 2??????????? ? 1
?44????? ?? 4?????? ??1?????? ?? 32????? ?????? 0
?45????? ?? 4?????? ? 2?????? ??? 32????? ?????? 1
?46????? ?? 5??????????1??????????33?????????????0
?47?????? ? 5??????????2???????????33?????????????1
?48??????? ?5??????????3???????????33????? ?????? 0
?50????? ? ?3????????? 1????????????3??????????????0
?51????? ? ?3???????? 1????????????3??????????????0

如果bizclass=2是同一種類型的class。由

????????
?????????<discriminator

????????????column="bizClass"

????????????type="string"

????????/>來表示。

posted @ 2006-07-06 10:37 aimy 閱讀(391) | 評論 (0) | 編輯收藏

no persistent for class

org.hibernate.hql.QuerySplitter - no persistent classes found for query class:
意味著你沒有將someclass的配置文件放在hibernate.config或沒有寫配置文件。

posted @ 2006-07-04 10:30 aimy 閱讀(1174) | 評論 (0) | 編輯收藏

6.26 spring 創建bean

1,通過構造函數創建bean

?<bean?id="baseDAO"?class="com.aimy.core.dao.impl.BaseDAOImpl">

相當于

basedaoimpl?baseDAO?=?new?BaseDAOImpl();

2,通過靜態工廠創建bean

<bean?id="driver1"?class="com.aimy.driver.driverManager"

factory-method="createInstance"/>

相當于

Object?driver1?=?driverManager.createInstance();

其中沒有指定driverManager.createInstance();返回對象的類型，而且createInstance()必須是static方法
3，通過實例工廠方法創建bean

＜bean?id="father"?class="com.aimy.Father"/>

．．．．．．．．

<bean?id="son"?factory-bean="father"?factory-method="createSon"/>

相當于

Father?father?=?new?Father();

Object?son?=?father.createSon();

其中father和son必須在同一個bean工廠或父bean工廠，即在同一個applicationcontext或子applicationcontext

二、如果applicationcontext默認預實例化那些singleton　bean，這樣就可以在beanfactory裝載時就檢查出錯誤，而如果singleton　bean設置為lazy－mode，

posted @ 2006-06-26 23:26 aimy 閱讀(237) | 評論 (0) | 編輯收藏

6.26

hibernate 保存空值的細節
1。如果字段在pojo類中是復雜對象類型，則在數據庫用nulll表示。
2。如果字段在pojo類中是簡單數據類型，則在數據庫用0表示。

posted @ 2006-06-26 09:56 aimy 閱讀(174) | 評論 (0) | 編輯收藏

常用鏈接

留言簿(1)

隨筆檔案

搜索

最新評論

閱讀排行榜

評論排行榜