鍦ㄥ紑鍙戠殑鏃跺欙紝寰堝鏃跺欓兘閬囧埌榪囬渶瑕佸姩鎬佹嫾鍐橲QL錛屾湁鐨勬槸鍦ㄩ厤緗枃浠朵腑鍐橲QL錛屾湁鐨勬槸鍦↗ava浠ｇ爜涓嫾鍐橲QL錛屼互閰嶇疆鏂囦歡鎷糞QL鐨勫彲浠ユ嬁IBatis涓轟唬琛紝浣嗘槸寰堝鏃跺欐槸浣跨敤Hibernate鐨勶紝榪欎釜鏃跺欏氨鎯寵鏄疕ibernate鑳藉儚IBatis閭ｆ牱鍐欏氨濂戒簡銆?/span>
榪欎釜鏃跺欏氨鎯沖埌浜嗘ā鏉胯璦鍜岄厤緗枃浠剁殑緇撳悎銆傛ā鏉垮紩鎿庡彲浠ラ夋嫨Velocity錛岀畝鍗曡屼笉澶卞己澶э紝閰嶇疆鏂囦歡鍙互妯′豢Hibernate鐨剆ql-query 鐨刋ML鏂囦歡銆?/span>
Sq-query鐨勭ず渚嬩唬鐮佸涓?SQL or HQL)錛?br />
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dynamic-hibernate PUBLIC "-//ANYFRAME//DTD DYNAMIC-HIBERNATE//EN"
"http://www.anyframejava.org/dtd/anyframe-dynamic-hibernate-mapping-4.0.dtd">
<dynamic-hibernate>
<query name="selectUserSQL">
<![CDATA[
SELECT USER_ID,NAME
FROM users_table Where 1=1
#if($name && $name.length() > 1)
AND name =:name
#end
]]>
</query>
<query name="selectUserHQL">
<![CDATA[
FROM users
Where 1=1
#if($name && $name.length() > 1)
AND name =:name
#end
]]>
</query>
<!DOCTYPE dynamic-hibernate PUBLIC "-//ANYFRAME//DTD DYNAMIC-HIBERNATE//EN"
"http://www.anyframejava.org/dtd/anyframe-dynamic-hibernate-mapping-4.0.dtd">
<dynamic-hibernate>
<query name="selectUserSQL">
<![CDATA[
SELECT USER_ID,NAME
FROM users_table Where 1=1
#if($name && $name.length() > 1)
AND name =:name
#end
]]>
</query>
<query name="selectUserHQL">
<![CDATA[
FROM users
Where 1=1
#if($name && $name.length() > 1)
AND name =:name
#end
]]>
</query>
鍦ㄧ郴緇熷姞杞芥椂錛岄渶瑕佹妸閰嶇疆鏂囦歡鍔犺澆鍒扮郴緇熶腑銆傚姞杞戒唬鐮佸叧閿儴鍒嗗涓嬶細
1 public class DynamicHibernateImpl implements InitializingBean, ResourceLoaderAware, ApplicationContextAware
2 public void afterPropertiesSet() throws Exception {
3 for (int i = 0; i < fileNames.size(); i++) {
4 String fileName = ((String) fileNames.get(i)).trim();
5 if (resourceLoader instanceof ResourcePatternResolver) {
6 try {
7 Resource[] resources=((ResourcePatternResolver) resourceLoader).getResources(fileName);
8 buildHQLMap(resources);
9 } catch (IOException ex) {
10 throw new Exception("Could not resolve sql definition resource pattern [" + fileName + "]", ex);
11 }
12 } else {
13 Resource resource = resourceLoader.getResource(fileName);
14 buildHQLMap(new Resource[] { resource });
15 }
16 }
17 }
18 protected void buildHQLMap(Resource[] resources) throws Exception {
19 for (int i = 0; i < resources.length; i++) {
20 buildHQLMap(resources[i]);
21 }
22 }
23 private void buildHQLMap(Resource resource) throws Exception {
24 try {
25 InputSource inputSource = new InputSource(resource.getInputStream());
26 org.w3c.dom.Document doc = this.documentLoader.loadDocument(inputSource, null, null, org.springframework.util.xml.XmlValidationModeDetector.VALIDATION_NONE, false);
27 Element root = doc.getDocumentElement();
28 List<Element> querys = DomUtils.getChildElements(root);
29 for(Element query:querys){
30 String queryName = query.getAttribute("name");
31 if (StringUtils.isEmpty(queryName)) {
32 throw new Exception("DynamicHibernate Service : name is essential attribute in a <query>.");
33 }
34 if(statements.containsKey(queryName)){
35 throw new Exception("DynamicHibernate Service : duplicated query in a <query>."+queryName);
36 }
37 statements.put(queryName, DomUtils.getTextValue(query));
38 }
39 } catch (SAXParseException se) {
40 throw se;
41 } catch (IOException ioe) {
42 throw ioe;
43 }
44 }
Spring鐨勯厤緗枃浠剁ず渚嬪涓嬶細
<bean id="dynamicHibernate" class="com.company.DynamicHibernateImpl">
<property name="sessionFactory" ref="sessionFactory" /><property name="simpleTemplate" ref="simpleTemplate" />
<property name="fileNames">
<list>
<value>classpath*:hibernate/dynamic/dynamic-hibernate-*.xml</value>
</list>
</property>
</bean>
涓嬩竴姝ユ槸鍦ㄤ嬌鐢ㄦ椂璋冪敤sql騫惰皟鐢ㄦā鏉挎柟娉曪紝榪涜sql鍔ㄦ佸寲銆?/span>
榪樻槸DynamicHibernateImpl榪欎釜綾?/span>
1 public List findList(String queryName, Map params, int pageIndex, int pageSize) throws Exception {
2 Context context = generateVelocityContext(params);
3 Query query = findInternal(queryName, context);
4 if (pageIndex > 0 && pageSize > 0) {
5 query.setFirstResult((pageIndex - 1) * pageSize);
6 query.setMaxResults(pageSize);
7 }
8 return query.list();
9 };
10 private Context generateVelocityContext(Map<String, Object> params) {
11 VelocityContext context = new VelocityContext();
12 if (null == params) {
13 return null;
14 }
15 Iterator<String> iterator = params.keySet().iterator();
16 while (iterator.hasNext()) {
17 String key = iterator.next();
18 Object value = params.get(key);
19 if (null == value) {
20 continue;
21 }
22 context.put(key, value);
23 }
24 return context;
25 };
26 private Query findInternal(String queryName, Context context) throws Exception {
27 String sql = findSQLByVelocity(queryName, context);
28 Query query = sessionFactory.getCurrentSession().createQuery(sql);
29 String[] namedParams = query.getNamedParameters();
30 setProperties(query, context, namedParams);
31 return query;
32 };
33 private String findSQLByVelocity(String queryName, Context context) throws Exception {
34 if (context == null)
35 context = new VelocityContext();
36 String sql = getSqlByName(queryName);
37 StringWriter writer = new StringWriter();
38 Velocity.evaluate(context, writer, "Hibernate", sql);
39 sql = writer.toString();
40 return sql;
41 };
42 protected String getSqlByName(String queryKey) {
43 return statements.get(queryKey);
44 }
2 Context context = generateVelocityContext(params);
3 Query query = findInternal(queryName, context);
4 if (pageIndex > 0 && pageSize > 0) {
5 query.setFirstResult((pageIndex - 1) * pageSize);
6 query.setMaxResults(pageSize);
7 }
8 return query.list();
9 };
10 private Context generateVelocityContext(Map<String, Object> params) {
11 VelocityContext context = new VelocityContext();
12 if (null == params) {
13 return null;
14 }
15 Iterator<String> iterator = params.keySet().iterator();
16 while (iterator.hasNext()) {
17 String key = iterator.next();
18 Object value = params.get(key);
19 if (null == value) {
20 continue;
21 }
22 context.put(key, value);
23 }
24 return context;
25 };
26 private Query findInternal(String queryName, Context context) throws Exception {
27 String sql = findSQLByVelocity(queryName, context);
28 Query query = sessionFactory.getCurrentSession().createQuery(sql);
29 String[] namedParams = query.getNamedParameters();
30 setProperties(query, context, namedParams);
31 return query;
32 };
33 private String findSQLByVelocity(String queryName, Context context) throws Exception {
34 if (context == null)
35 context = new VelocityContext();
36 String sql = getSqlByName(queryName);
37 StringWriter writer = new StringWriter();
38 Velocity.evaluate(context, writer, "Hibernate", sql);
39 sql = writer.toString();
40 return sql;
41 };
42 protected String getSqlByName(String queryKey) {
43 return statements.get(queryKey);
44 }
灝辮繖浜涖?/span>
澶у涔熻鏈夋洿濂界殑鏂規硶錛屾榪庝氦嫻併?/span>
QQ:24889356
GhostZhang 2011-09-08 11:02 鍙戣〃璇勮
]]>