lucene solr配置，集成到struts中

１.将下载的apache-solr-3.3.0.zip包进行解压。

２.将目录下example/solr中的文件拷到某一目录（solr.xml不能拷过去）。将此目录设为solr_home.并在tomcat的server.xml中加入如下内容：

 <Context docBase="mvn_struts2" path="/mvn_struts2"
     reloadable="true" source="org.eclipse.jst.jee.server:mvn_struts2">
     <Environment name="solr/home" type="java.lang.String"
      value="C:\Users\Kevin\Downloads\apache-solr-3.3.0\apache-solr-3.3.0\example\solr"
      override="true" />
    </Context>

３.在工程的web.xml中加入如下内容：

<filter>
  <filter-name>SolrRequestFilter</filter-name>
  <filter-class>org.apache.solr.servlet.SolrDispatchFilter</filter-class>
 </filter>

 <filter-mapping>
  <filter-name>SolrRequestFilter</filter-name>
  <url-pattern>/lucene/*</url-pattern>
 </filter-mapping>

 <servlet>
  <servlet-name>SolrServer</servlet-name>
  <servlet-class>org.apache.solr.servlet.SolrServlet</servlet-class>
  <load-on-startup>1</load-on-startup>
 </servlet>

 <servlet>
  <servlet-name>SolrUpdate</servlet-name>
  <servlet-class>org.apache.solr.servlet.SolrUpdateServlet</servlet-class>
  <load-on-startup>2</load-on-startup>
 </servlet>

 <servlet-mapping>
  <servlet-name>SolrServer</servlet-name>
  <url-pattern>/lucene/select/*</url-pattern>
 </servlet-mapping>

 <servlet-mapping>
  <servlet-name>SolrUpdate</servlet-name>
  <url-pattern>/lucene/update/*</url-pattern>
 </servlet-mapping>

４.在工程的struts.xml文件中加入如下内容：

<constant name="struts.action.excludePattern" value=".*/lucene/.*" />

５.在spring中加入任务，定时更新索引。更新索引代码如下：

@Scheduled(cron = "20 46 12 ? * *")
 public void createIndex() {
  String appPath = LuceneScheduler.class.getResource("/").toString();
  appPath = StringUtils.substringAfter(
    StringUtils.substringBefore(appPath, "WEB-INF"), "/");
  String docPath = appPath + "upload/";
  
  try {
   File file = new File(docPath);
   String urlString = constant.getUrl();
   StreamingUpdateSolrServer solr = new StreamingUpdateSolrServer(
     urlString, 1, 1);
   
   solr.deleteByQuery( "*:*" );
   solr.blockUntilFinished();
   indexFilesSolrCell(file.listFiles(), solr);
  } catch (Exception e) {
   e.printStackTrace();
  }
 }

 private void indexFilesSolrCell(File[] fileList,
   StreamingUpdateSolrServer solr) throws IOException,
   SolrServerException, InterruptedException {
  for (File file : fileList) {
   if (file.isFile()) {
    ContentStreamUpdateRequest up = new ContentStreamUpdateRequest(
      "/update/extract");
    up.addFile(file);
    up.setParam("uprefix", "attr_");
    up.setParam("fmap.content", "attr_content");
    up.setParam("literal.id", file.getPath());
    up.setAction(AbstractUpdateRequest.ACTION.COMMIT, false, false);
    solr.request(up);
    solr.blockUntilFinished();
    System.out.println("Analysis file:" + file.getPath());
   } else if (file.isDirectory()) {
    indexFilesSolrCell(file.listFiles(), solr);
   }
  }
 }

６.接下来，便可对已索引的文件进行全文检索，如下是struts中的action类内容:

@Autowired
 private Constant constant;
 private String search;
 private List<SearchItem> searchItemList = new ArrayList<SearchItem>();

 public String list() {
  String urlString = constant.getUrl();
  try {
   StreamingUpdateSolrServer solr = new StreamingUpdateSolrServer(
     urlString, 1, 1);

   if (StringUtils.isNotBlank(search)) {
    QueryResponse rsp = solr.query(new SolrQuery("attr_content:"
      + search));
    SolrDocumentList solrDocumentList = rsp.getResults();
    for (SolrDocument solrDocument : solrDocumentList) {
     SearchItem searchItem = new SearchItem();

     searchItem.setHref(solrDocument.getFieldValue("id")
       .toString());
     String content = removeSpecial(solrDocument.getFieldValue(
       "attr_content").toString());
     content = StringUtils.left(content, 30);
     searchItem.setContent(content);

     String title = "";
     Object titleO = solrDocument.getFieldValue("title");
     if (titleO == null) {
      title = StringUtils.left(content, 10);
     } else {
      title = removeSpecial(titleO.toString());
     }
     searchItem.setTitle(title);

     searchItemList.add(searchItem);
    }
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
  return "list";
 }

 private String removeSpecial(String str) {
  str = StringUtils.substringAfter(str, "[");
  str = StringUtils.substringBeforeLast(str, "]");
  str = StringUtils.trim(str);
  return str;
 }

 public String getSearch() {
  return search;
 }

 public void setSearch(String search) {
  this.search = search;
 }

 public List<SearchItem> getSearchItemList() {
  return searchItemList;
 }

 public void setSearchItemList(List<SearchItem> searchItemList) {
  this.searchItemList = searchItemList;
 }

评论

1 楼 mythet 2012-08-13  

上面的配置有问题，测试半天都访问不了，原因是web.xml缺少了关键的配置。

<filter>
     <filter-name>SolrRequestFilter</filter-name>
     <filter-class>org.apache.solr.servlet.SolrDispatchFilter
     </filter-class>
  <init-param>
      <param-name>path-prefix</param-name>
      <param-value>/lucene</param-value>
     </init-param>
</filter>