Solrj是Solr搜索服务器的一个比较基础的客户端工具，可以非常方便地与Solr搜索服务器进行交互。最基本的功能就是管理Solr索引，包括添加、更新、删除和查询等。对于一些比较基础的应用，用Solj基本够用，而且你可以非常容易地通过使用Solrj的API实现与Solr搜索服务器进行交互，实现对Solr的基本管理功能。如果你的应用比较复杂，可以扩展Solrj来满足需要。

       使用 SolrJ操作索引库：

package com.hcm.solr.test;    import java.io.IOException;  import java.util.ArrayList;  import java.util.Iterator;  import java.util.List;  import java.util.Map;    import org.apache.commons.logging.Log;  import org.apache.commons.logging.LogFactory;  import org.apache.solr.client.solrj.SolrQuery;  import org.apache.solr.client.solrj.SolrServerException;  import org.apache.solr.client.solrj.impl.HttpSolrServer;  import org.apache.solr.client.solrj.response.QueryResponse;  import org.apache.solr.client.solrj.response.UpdateResponse;  import org.apache.solr.common.SolrDocument;  import org.apache.solr.common.SolrDocumentList;  import org.apache.solr.common.SolrInputDocument;  import org.apache.solr.common.params.ModifiableSolrParams;  import org.junit.Before;  import org.junit.Test;    import com.hcm.solr.entity.Message;    public class SolrTest {     private static Log logger = LogFactory.getLog(SolrTest.class);     private static final String URL = "http://127.0.0.1:8086/solr";     private HttpSolrServer server = null;     @Before   public void init() {    // 创建 server    server = new HttpSolrServer(URL);   }     /**    * 添加文档    */   @Test   public void addDoc() {      SolrInputDocument doc = new SolrInputDocument();      doc.addField("id", "11");    doc.addField("title", "this is my document !!");      try {       UpdateResponse response = server.add(doc);     // 提交     server.commit();       logger.info("########## Query Time :" + response.getQTime());     logger.info("########## Elapsed Time :" + response.getElapsedTime());     logger.info("########## Status :" + response.getStatus());      } catch (SolrServerException | IOException e) {     logger.error("", e);    }   }     /**    * 添加多个文档    */   @Test   public void addDocs() {      String[] titles = new String[] { "aaaaaaa", "bbbbbbb", "ccccccc", "dddddd", "eeeeee" };      List<SolrInputDocument> docs = new ArrayList<SolrInputDocument>();      int i = 0;    for (String str : titles) {     SolrInputDocument doc = new SolrInputDocument();     doc.addField("id", i++);     doc.addField("title", str);     docs.add(doc);    }      try {       UpdateResponse response = server.add(docs);     server.commit();       logger.info("########## Query Time :" + response.getQTime());     logger.info("########## Elapsed Time :" + response.getElapsedTime());     logger.info("########## Status :" + response.getStatus());      } catch (SolrServerException | IOException e) {     logger.error("", e);    }   }     /**    * 添加一个Entity到索引库    */   @Test   public void addBean() {      Message msg = new Message("1001", "What is Fluentd?", new String[] { "Fluentd is an open source data collector for unified logging layer",      "Fluentd allows you to unify data collection and consumption for a better use and understanding of data.",      "Fluentd decouples data sources from backend systems by providing a unified logging layer in between.",      "Fluentd proves you can achieve programmer happiness and performance at the same time. A great example of Ruby beyond the Web.",      "Fluentd to differentiate their products with better use of data." });      try {       UpdateResponse response = server.addBean(msg);     server.commit();       logger.info("########## Query Time :" + response.getQTime());     logger.info("########## Elapsed Time :" + response.getElapsedTime());     logger.info("########## Status :" + response.getStatus());      } catch (SolrServerException | IOException e) {     logger.error("", e);    }   }     /**    * 添加多个Entity到索引库    */   @Test   public void addBeans() {      List<Message> msgs = new ArrayList<Message>();      Message msg = new Message("1001", "What is Fluentd?", new String[] { "Fluentd is an open source data collector for unified logging layer",      "Fluentd allows you to unify data collection and consumption for a better use and understanding of data.",      "Fluentd decouples data sources from backend systems by providing a unified logging layer in between.",      "Fluentd proves you can achieve programmer happiness and performance at the same time. A great example of Ruby beyond the Web.",      "Fluentd to differentiate their products with better use of data." });      Message msg2 = new Message("1002", "What is Fluentd?", new String[] { "Fluentd is an open source data collector for unified logging layer",      "Fluentd allows you to unify data collection and consumption for a better use and understanding of data.",      "Fluentd decouples data sources from backend systems by providing a unified logging layer in between.",      "Fluentd proves you can achieve programmer happiness and performance at the same time. A great example of Ruby beyond the Web.",      "Fluentd to differentiate their products with better use of data." });      msgs.add(msg);    msgs.add(msg2);      try {       UpdateResponse response = server.addBeans(msgs);     server.commit();       logger.info("########## Query Time :" + response.getQTime());     logger.info("########## Elapsed Time :" + response.getElapsedTime());     logger.info("########## Status :" + response.getStatus());      } catch (SolrServerException | IOException e) {     logger.error("", e);    }   }     /**    * 删除索引    */   @Test   public void deleteDoc() {    try {     server.deleteById("0");     server.commit();    } catch (SolrServerException | IOException e) {     logger.error("", e);    }   }      /**    * 更新索引<br>    * solr索引库不同于数据库，没有更新的功能。如果想更新，先通过id删除对应的文档，再添加新的文档。    */   @Test   public void updateDoc() {    // ... ...   }     /**    * 查询    */   @Test   public void testQuery() {    String queryStr = "*:*";    SolrQuery params = new SolrQuery(queryStr);    params.set("rows", 10);    try {     QueryResponse response = server.query(params);     SolrDocumentList list = response.getResults();     logger.info("########### 总共 ： " + list.getNumFound() + "条记录");     for (SolrDocument doc : list) {      logger.info("######### id : " + doc.get("id") + "  title : " + doc.get("title"));     }    } catch (SolrServerException e) {     logger.error("", e);    }   }     /**    * 简单查询(分页)    */   @Test   public void querySimple() {    ModifiableSolrParams params = new ModifiableSolrParams();    params.set("q", "this my");    params.set("q.op", "and");    params.set("start", 0);    params.set("rows", 5);    params.set("fl", "*,score");    try {     QueryResponse response = server.query(params);     SolrDocumentList list = response.getResults();     logger.info("########### 总共 ： " + list.getNumFound() + "条记录");     for (SolrDocument doc : list) {      logger.info("######### id : " + doc.get("id") + "  title : " + doc.get("title"));     }    } catch (SolrServerException e) {     logger.error("", e);    }   }     /**    * 查询(分页,高亮)    */   @Test   public void queryCase() {    String queryStr = "title:this";    SolrQuery params = new SolrQuery(queryStr);    params.set("start", 0);    params.set("rows", 5);      // 启用高亮组件, 设置高亮    params.setHighlight(true)             .addHighlightField("title")           .setHighlightSimplePre("<span class=\"red\">")     .setHighlightSimplePost("</span>")     .setHighlightSnippets(2)     .setHighlightFragsize(1000)     .setStart(0)     .setRows(10)     .set("hl.useFastVectorHighlighter", "true")     .set("hl.fragsize", "200");      try {     QueryResponse response = server.query(params);     SolrDocumentList list = response.getResults();     logger.info("########### 总共 ： " + list.getNumFound() + "条记录");     for (SolrDocument doc : list) {      logger.info("######### id : " + doc.get("id") + "  title : " + doc.get("title"));     }       Map<String, Map<String, List<String>>> map = response.getHighlighting();     Iterator<String> iterator = map.keySet().iterator();       while (iterator.hasNext()) {      String key = iterator.next();      Map<String, List<String>> values = map.get(key);      logger.info("############################################################");      logger.info("############ id : " + key);        for (Map.Entry<String, List<String>> entry : values.entrySet()) {       String subKey = entry.getKey();       List<String> subValues = entry.getValue();         logger.info("############ subKey : " + subKey);       for (String str : subValues) {        logger.info("############ subValues : " + str);       }      }           }         } catch (SolrServerException e) {     logger.error("", e);    }   }    }

POJO：

package com.hcm.solr.entity;    import java.io.Serializable;    import org.apache.solr.client.solrj.beans.Field;    public class Message implements Serializable {     /**    *     */   private static final long serialVersionUID = 1L;     private String id;   private String title;   private String[] content;     public Message() {    super();   }     public Message(String id, String title, String[] content) {    super();    this.id = id;    this.title = title;    this.content = content;   }     public String getId() {    return id;   }     @Field("id")   public void setId(String id) {    this.id = id;   }     public String getTitle() {    return title;   }     @Field("title")   public void setTitle(String title) {    this.title = title;   }     public String[] getContent() {    return content;   }     @Field("content")   public void setContent(String[] content) {    this.content = content;   }    }

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