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  • Solr使用solr4J操作索引库

     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。

           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：

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    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：

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    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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  • 原文地址：https://www.cnblogs.com/huajiezh/p/5399710.html
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