采用得是ORACLE9i数据库,Jboss或Weblogic。
JDBC采用ORACLE9i自带的Class12.jar
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数据库结构:
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BO采用xdoclet建立的:
注:valueString并不映射到数据库的CLOB字段,只是方便需要使用这个BO的人用GET、SET 处理这个巨长的CLOB字段
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xdocLet生成的XML文件:
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insert的代码:
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注:Weblogic必须使用weblogic.jdbc.vendor.oracle.OracleThinClob
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读取CLOB字段:
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更新这个字段的代码:
JDBC采用ORACLE9i自带的Class12.jar
-------------
数据库结构:
java代码: |
CREATE TABLE SNCPARAMETERS ( ID NUMBER ( 19 ) NOT NULL, SNCID NUMBER ( 19 ), NAME VARCHAR2 ( 255 ), VALUE CLOB ) |
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BO采用xdoclet建立的:
java代码: |
public class SNCParameters extends BaseObject { /** * Returns the id. * * @return long * @hibernate.id * column = "id" * type = "long" * generator-class = "native" * unsaved-value = "null" */ public Long getId ( ) { return id; } /** * Sets the Id attribute of the SNCParameters object * * @param id The new Id value */ public void setId ( Long id ) { this. id = id; } /** * Returns the name. * * @return String * * @hibernate.property * column = "name" * type = "string" * not-null = "true" * unique = "false" */ public String getName ( ) { return name; } /** * Sets the Name attribute of the SNCParameters object * * @param name The new Name value */ public void setName ( String name ) { this. name = name; } /** * Returns the sncId. * * @return Long * * @hibernate.property * column = "sncId" * type = "long" * not-null = "true" * unique = "false" */ public Long getSncId ( ) { return sncId; } /** * Sets the SncId attribute of the SNCParameters object * * @param sncId The new SncId value */ public void setSncId ( Long sncId ) { this. sncId = sncId; } /** * Returns the values. * * @return Clob * * @hibernate.property * column = "value" * type = "clob" * not-null = "true" * unique = "false" */ public Clob getValue ( ) { return value; } /** * Sets the Values attribute of the SNCParameters object * * @param values The new Values value */ public void setValue ( Clob value ) { this. value = value; } private Long id; private Long sncId; private String name; private Clob value; private String valueString; public String getValueString ( ) { return valueString; } public void setValueString ( String valueString ) { this. valueString = valueString; } } |
注:valueString并不映射到数据库的CLOB字段,只是方便需要使用这个BO的人用GET、SET 处理这个巨长的CLOB字段
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xdocLet生成的XML文件:
java代码: |
<?xml version=" 1. 0"?> <!DOCTYPE hibernate-mapping PUBLIC "- //Hibernate/Hibernate Mapping DTD 2.0//EN" "http: //hibernate.sourceforge.net/hibernate-mapping-2.0.dtd"> <hibernate-mapping> < class name="com. idncn. mc. bo. SNCParameters" table="SNCParameters" dynamic-update=" false" dynamic-insert=" false" > <id name="id" column="id" type="long" unsaved-value=" null" > <generator class="native"> </generator> </id> <property name="name" type="string" update=" true" insert=" true" column="name" not- null=" true" unique=" false" /> <property name="sncId" type="long" update=" true" insert=" true" column="sncId" not- null=" true" unique=" false" /> <property name="value" type="clob" update=" true" insert=" true" column="value" not- null=" true" unique=" false" /> </ class> </hibernate-mapping> |
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insert的代码:
java代码: |
public List batchAddSncParameters ( List sncParametersList, Long sncId ) throws DbAccessException { logger. enterMethod ( ); List ret = new ArrayList ( ); try { sess = getSession ( ); if (sncParametersList != null && sncParametersList. size ( ) > 0 ) { for ( int i = 0; i < sncParametersList. size ( ); i++ ) { SNCParameters cp = (SNCParameters ) sncParametersList. get (i ); long newId = - 1; if (cp != null ) { SNCParameters cpNew = new SNCParameters ( ); cpNew. setSncId (sncId ); cpNew. setName (cp. getName ( ) ); cpNew. setValue (Hibernate. createClob (" " ) ); newId = ( ( Long ) sess. save (cpNew ) ). longValue ( ); sess. flush ( ); sess. refresh (cpNew, LockMode. UPGRADE ); String content = cp. getValueString ( ); String appserver = System. getProperty ("appserver", "jboss" ); if (!appserver. equalsIgnoreCase ("jboss" ) ) { //weblogic OracleThinClob clob = (OracleThinClob ) cpNew. getValue ( ); java. io. Writer pw = clob. getCharacterOutputStream ( ); pw. write (content ); pw. flush ( ); pw. close ( ); } else { //jboss oracle. sql. CLOB clob = (oracle. sql. CLOB ) cpNew. getValue ( ); java. io. Writer pw = clob. getCharacterOutputStream ( ); pw. write (content ); pw. flush ( ); pw. close ( ); } ret. add ( new Long (newId ) ); } } } } catch ( Exception e ) { logger. error (e ); ErrorReason errorReason = new ErrorReason (ErrorReason. INSERT_OBJECT_FAILED_REASON ); throw new DbAccessException (DbAccessException. DBA_OPERATE_EXCEPTION, errorReason ); } finally { closeSession (sess ); logger. exitMethod ( ); } return ret; } |
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注:Weblogic必须使用weblogic.jdbc.vendor.oracle.OracleThinClob
---------------------
读取CLOB字段:
java代码: |
public List selectSncParametersBySncId (long sncId ) throws DbAccessException { logger. enterMethod ( ); List ret = new ArrayList ( ); try { sess = getSession ( ); String query = "select cp from cp in class com. idncn. mc. bo. SNCParameters where cp. sncId = ?"; logger. debug ("SQL=" + query ); List iter = sess. find (query, new Long (sncId ), Hibernate. LONG ); for ( int i = 0; i < iter. size ( ); i++ ) { SNCParameters newCp = new SNCParameters ( ); SNCParameters cp = (SNCParameters ) (iter. get (i ) ); logger. debug ("after fetch:" + cp ); newCp. setId (cp. getId ( ) ); newCp. setSncId (cp. getSncId ( ) ); newCp. setName (cp. getName ( ) ); java. sql. Clob clob = cp. getValue ( ); if (clob != null ) { logger. debug ("b===" + clob. length ( ) ); String b = clob. getSubString ( 1, ( int ) clob. length ( ) ); //logger.debug("b==="+b); newCp. setValueString (b ); } ret. add (newCp ); } } catch ( Exception e ) { logger. error (e ); ErrorReason errorReason = new ErrorReason (ErrorReason. SELECT_FAILED_REASON ); throw new DbAccessException (DbAccessException. DBA_OPERATE_EXCEPTION, errorReason ); } finally { closeSession (sess ); logger. exitMethod ( ); } return ret; } |
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更新这个字段的代码:
java代码: |
public void updateSncParameters (SNCParameters newParam ) throws DbAccessException { logger. enterMethod ( ); try { sess = getSession ( ); Long id = newParam. getId ( ); SNCParameters pp = (SNCParameters ) sess. load (SNCParameters. class, id, net. sf. hibernate. LockMode. UPGRADE ); pp. setSncId (newParam. getSncId ( ) ); pp. setName (newParam. getName ( ) ); pp. setId (newParam. getId ( ) ); String newValue = newParam. getValueString ( ); logger. debug ("Update Length =" + newValue. length ( ) ); String appserver = System. getProperty ("appserver", "jboss" ); logger. debug ("appserver: " + appserver ); if (!appserver. equalsIgnoreCase ("jboss" ) ) { //weblogic OracleThinClob clob = (OracleThinClob ) pp. getValue ( ); if (pp != null ) { java. io. Writer pw = clob. getCharacterOutputStream ( ); pw. write (newValue ); pw. flush ( ); pw. close ( ); } } else { //jboss oracle. sql. CLOB clob = (oracle. sql. CLOB ) pp. getValue ( ); if (pp != null ) { java. io. Writer pw = clob. getCharacterOutputStream ( ); pw. write (newValue ); pw. flush ( ); pw. close ( ); } } } catch ( Exception e ) { logger. error (e ); ErrorReason errorReason = new ErrorReason (ErrorReason. UPDATE_OBJECT_FAILED_REASON ); throw new DbAccessException (DbAccessException. DBA_OPERATE_EXCEPTION, errorReason ); } finally { closeSession (sess ); logger. exitMethod ( ); } } |