八、SOLRJ 更新和删除索引

SolrUtil

 
SolrUtil提供一个对象的增加或者更新(都是同一个方法）
 
public static <T> boolean saveOrUpdate(T entity) throws SolrServerException, IOException {
DocumentObjectBinder binder = new DocumentObjectBinder();
SolrInputDocument doc = binder.toSolrInputDocument(entity);
client.add(doc);
client.commit();
return true;
}
 

根据id删除这个索引
 
public static boolean deleteById(String id) {
try {
client.deleteById(id);
client.commit();
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
 
 
 
 
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package how2java;
import java.io.IOException;
import java.util.List;
 
import org.apache.solr.client.solrj.SolrClient;
import org.apache.solr.client.solrj.SolrQuery;
import org.apache.solr.client.solrj.SolrServerException;
import org.apache.solr.client.solrj.beans.DocumentObjectBinder;
import org.apache.solr.client.solrj.impl.HttpSolrClient;
import org.apache.solr.client.solrj.response.QueryResponse;
import org.apache.solr.common.SolrDocument;
import org.apache.solr.common.SolrDocumentList;
import org.apache.solr.common.SolrInputDocument;
import org.apache.solr.common.util.NamedList;
 
public class SolrUtil {
    public static SolrClient client;
    private static String url;
    static {
        url = "http://localhost:8983/solr/how2java";
        client = new HttpSolrClient.Builder(url).build();
    }
 
    public static void queryHighlight(String keywords) throws SolrServerException, IOException {
        SolrQuery q = new SolrQuery();
        //开始页数
        q.setStart(0);
        //每页显示条数
        q.setRows(10);
        // 设置查询关键字
        q.setQuery(keywords);
        // 开启高亮
        q.setHighlight(true);
        // 高亮字段
        q.addHighlightField("name");
        // 高亮单词的前缀
        q.setHighlightSimplePre("<span style='color:red'>");
        // 高亮单词的后缀
        q.setHighlightSimplePost("</span>");
        //摘要最长100个字符
        q.setHighlightFragsize(100);
        //查询
        QueryResponse query = client.query(q);
 
        //获取高亮字段name相应结果
        NamedList<Object> response = query.getResponse();
        NamedList<?> highlighting = (NamedList<?>) response.get("highlighting");
        for (int i = 0; i < highlighting.size(); i++) {
            System.out.println(highlighting.getName(i) + "：" + highlighting.getVal(i));
        }
         
        //获取查询结果
        SolrDocumentList results = query.getResults();
        for (SolrDocument result : results) {
            System.out.println(result.toString());
        }
    }
 
    public static <T> boolean batchSaveOrUpdate(List<T> entities) throws SolrServerException, IOException {
 
        DocumentObjectBinder binder = new DocumentObjectBinder();
        int total = entities.size();
        int count=0;
        for (T t : entities) {
            SolrInputDocument doc = binder.toSolrInputDocument(t);
            client.add(doc);
            System.out.printf("添加数据到索引中，总共要添加 %d 条记录，当前添加第%d条 %n",total,++count);
        }
        client.commit();
        return true;
    }
 
    public static QueryResponse query(String keywords,int startOfPage, int numberOfPage) throws SolrServerException, IOException {
        SolrQuery query = new SolrQuery();
        query.setStart(startOfPage);
        query.setRows(numberOfPage);
         
        query.setQuery(keywords);
        QueryResponse rsp = client.query(query);
        return rsp;
    }
 
    public static <T> boolean saveOrUpdate(T entity) throws SolrServerException, IOException {
        DocumentObjectBinder binder = new DocumentObjectBinder();
        SolrInputDocument doc = binder.toSolrInputDocument(entity);
        client.add(doc);
        client.commit();
        return true;
    }
     
    public static boolean deleteById(String id) {
        try {
            client.deleteById(id);
            client.commit();
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }
     
}

TestSolr4j

 
修改之前查询一次
修改之后查询一次
删除之后查询一次
观察修改和删除的效果
TestSolr4j
 
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package how2java;
 
import java.io.IOException;
import java.util.Collection;
import java.util.List;
 
import org.apache.solr.client.solrj.SolrServerException;
import org.apache.solr.client.solrj.response.QueryResponse;
import org.apache.solr.common.SolrDocument;
import org.apache.solr.common.SolrDocumentList;
 
public class TestSolr4j {
 
    public static void main(String[] args) throws SolrServerException, IOException {
        String keyword = "name:鞭";
        System.out.println("修改之前");
        query(keyword);
         
        Product p = new Product();
        p.setId(51173);
        p.setName("修改后的神鞭");
        SolrUtil.saveOrUpdate(p);
        System.out.println("修改之后");
        query(keyword);
         
        SolrUtil.deleteById("51173");
        System.out.println("删除之后");
        query(keyword);
         
    }
 
    private static void query(String keyword) throws SolrServerException, IOException {
        QueryResponse queryResponse = SolrUtil.query(keyword,0,10);
        SolrDocumentList documents= queryResponse.getResults();
        System.out.println("累计找到的条数："+documents.getNumFound());
        if(!documents.isEmpty()){
              
            Collection<String> fieldNames = documents.get(0).getFieldNames();
            for (String fieldName : fieldNames) {
                System.out.print(fieldName+"\t");
            }
            System.out.println();
        }
          
        for (SolrDocument solrDocument : documents) {
              
            Collection<String> fieldNames= solrDocument.getFieldNames();
              
            for (String fieldName : fieldNames) {
                System.out.print(solrDocument.get(fieldName)+"\t");
                  
            } 
            System.out.println();
              
        }
    }
 
}

posted on 2019-01-04 11:31  我是司  阅读(904)  评论(0)    收藏  举报

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