Integrate hibernate search into existing projects for full-text search functionality

The new version of the API that was intended to use Lucene was too cumbersome, and finally decided to use Hibernate search to implement full-text indexing. This blog post is an example of what I've done in the past to achieve full-text retrieval.

1, modify hibernate configuration file , because my system uses SSH2 to develop, so I modified the spring configuration file

<bean id= "Sessionfactory"  class= "Org.springframework.orm.hibernate4.LocalSessionFactoryBean" >     <property name= "DataSource"  ref= "DataSource"  />     <property name= "Hibernateproperties" >        < Props>            <prop key= " Hibernate.dialect ">org.hibernate.dialect.MySQL5Dialect</prop>             <prop key= "Hibernate.hbm2ddl.auto" >update</prop>             <prop key= "Hibernate.show_sql" > True</prop>            <prop key= " Hibernate.search.default.directory_provider ">filesystem</prop>             <p rop key= "Hibernate.search.default.indexBase" >E:/index</prop>         </props>    </property>    <property  name= "Mappingresources" >        <list>             <value>cn/harmel/blog/domain/user.hbm.xml </value>            <value>cn/harmel/ blog/domain/category.hbm.xml</value>             <value>cn/harmel/blog/domain/Article.hbm.xml</value>             <value>cn/harmel/blog/domain/Comment.hbm.xml</value>             <value>cn/harmel/blog/domain/ attachment.hbm.xml</value>        </list>    </property></bean> 

In fact, the following two properties are configured:

Hibernate.search.default.directory_provider = FileSystem

Hibernate.search.default.indexBase = Index Store Directory

2, annotation to the entity

package cn.harmel.blog.domain;import java.util.date;import java.util.hashset;import  java.util.set;import org.hibernate.search.annotations.analyzer;import  org.hibernate.search.annotations.documentid;import org.hibernate.search.annotations.field;import  org.hibernate.search.annotations.indexed;import org.wltea.analyzer.lucene.ikanalyzer;/** *  Articles  *  *  @author  harmel * */@Indexed @analyzer (impl =  Ikanalyzer.class) public class article {     @DocumentId      private Long id;     @Field     private string  title;     @Field     private String content;      @Field     private String description;     Private date posttime;    private date lastedittime;    private int viewcount;    private  Category category;    private set<comment> comments = new  HashSet<Comment> (    private set<attachment> attachments);  = new HashSet<Attachment> ();    //  Some getter and setter methods are omitted here      //...}

Note Description:

@Indexed: Let the entity support the index

@Analyzer : Set the word breaker, I'm using an open source IK Chinese word breaker

@DocumentID: Index Document ID

@Field : The indexed field, the default property value for the annotation is

store=store.no: Whether the data is stored in the index, whether store=store.no or store=store.yes is not affected by the experiment will not affect the final search. If the store=store.no value is obtained through the database, if the Store=store.yes value is obtained directly from the index document.

Index=index.yes: whether to index

analyze=analyze.yes: whether participle

The index is automatically generated or modified when the annotated entity is saved and updated.

3. Query Index

Public pagemodel<article> searcharticle (int pagenum, int pagesize, string  keyword)  {    fulltextsession fts = search.getfulltextsession ( Sessionfactory.getcurrentsession ());    querybuilder qb =  Fts.getsearchfactory (). Buildquerybuilder (). forentity (Article.class). Get ();    query  Lucenequery = qb.keyword (). Onfields ("title",  "Content",  "description"). Matching (keyword). CreateQuery ();     fulltextquery query = fts.createfulltextquery (luceneQuery ,  article.class);     query.setfirstresult (pagenum - 1)  *  pageSize);     query.setmaxresults (pageSize);    list<article>  data = query.list ();     //Package Paging Data     PageModel< Article> model = new pagEmodel<> (Pagenum, pagesize, data.size ());     //Highlight Data      model.setdata (Searchutils.hightlight (lucenequery, data,  "title",  "Content",  " description "));     return model;}

The data Highlighting tool method

/***  highlighting article * *  @param  query {@link  org.apache.lucene.search.Query}*  @param  data  data *  @param  fields  fields to be highlighted *  @return   highlight Data */public static  List<article> hightlight (query query, list<article> data, string...  Fields)  {    List<Article> result = new ArrayList< Article> ();     formatter formatter = new simplehtmlformatter ("<b  style=\ "color:red\" > ", " </b> ")     queryscorer queryscorer =  new queryscorer (query);    highlighter highlighter = new  Highlighter (formatter, queryscorer);    //  use IK chinese word      Analyzer analyzer = new ikanalyzer ();    for  (Article a  : data)  {    //  build new objects to return to avoid page confusion (my page is garbled)     article article =  new article ();    for  (string fieldname : fields)  {         //  get the field value and assign a value to the new Article object          Object fieldValue = ReflectionUtils             .invokemethod (Beanutils.getpropertydescriptor (article.class, fieldname). Getreadmethod (), a);         reflectionutils.invokemethod ( Beanutils.getpropertydescriptor (Article.class, fieldname). Getwritemethod (),             article, fieldvalue);         string hightlightfieldvalue = null;        try  {      &nbSp;     hightlightfieldvalue = highlighter.getbestfragment (analyzer,  Fieldname, string.valueof (fieldvalue));        } catch  (exception e)  {            throw  New runtimeexception ("Highlight keyword failed",  e);        }         //  re-assign value if highlight is successful         if   (Hightlightfieldvalue != null)  {             reflectionutils.invokemethod (Beanutils.getpropertydescriptor (Article.class, fieldName). Getwritemethod (),                 article,hightlightfieldvalue);        }         }        //  Assignment Value id         Reflectionutils.invokemethod (Beanutils.getpropertydescriptor (article.class,  "id"). GetWriteMethod (),             article, a.getid ());         result.add (article);     }    return  result;}

4. Page Iteration Display

<s:iterator value= "#request. Pagemodel.data" ><div class= "article" >     <div class= "Article_title_area" >        <span  class= "Article_title" ><a href= "${pagecontext.request.contextpath }/article/show.action?" id=${id } ">${title }</a></span>        < span class= "Article_date" > Release date: <s:date name= "Posttime"  format= "YYYY-MM-DD&NBSP;HH:MM:SS"/ ></span>    </div>    <div class= "Article_ Content ">${description }</div>    <div class=" Article_count_info " >        <span> reading (${viewcount }) </span>         <span> Reviews (${comments.size ()  }) </span>     </div></div></s:iterator> 

Integrate hibernate search into existing projects for full-text indexing