Solr JAVA客户端SolrJ的使用

以你之姓@ 2022-06-15 12:14 217阅读 0赞

## 一、Solrj简介 ##

SolrJ是操作Solr的JAVA客户端，它提供了增加、修改、删除、查询Solr索引的JAVA接口。SolrJ针对 Solr提供了Rest 的HTTP接口进行了封装， SolrJ底层是通过使用httpClient中的方法来完成Solr的操作。

## 二、示例演示 ##

### 1、创建一个Maven工程，引入依赖如下： ###

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <groupId>com.kang.solrj</groupId>
        <artifactId>kang-solrj</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    
        <dependencies>
            <dependency>
                <groupId>org.apache.solr</groupId>
                <artifactId>solr-solrj</artifactId>
                <version>4.10.1</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.11</version>
            </dependency>
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
                <version>1.7.7</version>
            </dependency>
            <dependency>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
                <version>1.1.3</version>
            </dependency>
            <dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-lang3</artifactId>
                <version>3.3.2</version>
            </dependency>
            
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>2.4.2</version>
            </dependency>
        </dependencies>
    </project>

### 2、定义一个pojo用于测试 ###

package com.kang.solrj.pojo;
    
    import org.apache.solr.client.solrj.beans.Field;
    
    public class Foo {
        
    
        @Field("id")
        private String id;
    
        @Field("title")
        private String title;
    
        public String getId() {
            return id;
        }
    
        public void setId(String id) {
            this.id = id;
        }
    
        public String getTitle() {
            return title;
        }
    
        public void setTitle(String title) {
            this.title = title;
        }
    
        @Override
        public String toString() {
            StringBuilder builder = new StringBuilder();
            builder.append("Foo [id=");
            builder.append(id);
            builder.append(", title=");
            builder.append(title);
            builder.append("]");
            return builder.toString();
        }
    
    }

@Field的作用  
作用1：指定Bean的一个字段为Field

@Field
    private String url;

schema.xml配置必需有url这个field，不然会报错。

当bean的字段为url，而实际schema.xml中的字段为s\_url,其使用方法为：

@Field("s_url")
    private String url;

schema.xml配置必需有url这个field，不然会报错。

### 3、针对该pojo的编写Solr增删改查操作 ###

package com.kang.solrj.service;
    
    import java.util.List;
    import java.util.Map;
    
    import org.apache.commons.lang3.StringUtils;
    import org.apache.solr.client.solrj.SolrQuery;
    import org.apache.solr.client.solrj.impl.HttpSolrServer;
    import org.apache.solr.client.solrj.response.QueryResponse;
    
    import com.kang.solrj.pojo.Foo;
    
    public class SolrjService {
    
        // 定义http的solr服务
        private HttpSolrServer httpSolrServer;
    
        public SolrjService(HttpSolrServer httpSolrServer) {
            this.httpSolrServer = httpSolrServer;
        }
    
        public void add(Foo foo) throws Exception {
            this.httpSolrServer.addBean(foo); //添加数据到solr服务器
            this.httpSolrServer.commit(); //提交
        }
    
        public void delete(List<String> ids) throws Exception {
            this.httpSolrServer.deleteById(ids);
            this.httpSolrServer.commit(); //提交
        }
    
        public List<Foo> search(String keywords, Integer page, Integer rows) throws Exception {
            SolrQuery solrQuery = new SolrQuery(); //构造搜索条件
            solrQuery.setQuery("title:" + keywords); //搜索关键词
            // 设置分页 start=0就是从0开始，，rows=5当前返回5条记录，第二页就是变化start这个值为5就可以了。
            solrQuery.setStart((Math.max(page, 1) - 1) * rows);
            solrQuery.setRows(rows);
    
            //是否需要高亮
            boolean isHighlighting = !StringUtils.equals("*", keywords) && StringUtils.isNotEmpty(keywords);
    
            if (isHighlighting) {
                // 设置高亮
                solrQuery.setHighlight(true); // 开启高亮组件
                solrQuery.addHighlightField("title");// 高亮字段
                solrQuery.setHighlightSimplePre("<em>");// 标记，高亮关键字前缀
                solrQuery.setHighlightSimplePost("</em>");// 后缀
            }
    
            // 执行查询
            QueryResponse queryResponse = this.httpSolrServer.query(solrQuery);
            List<Foo> foos = queryResponse.getBeans(Foo.class);
            if (isHighlighting) {
                // 将高亮的标题数据写回到数据对象中
                Map<String, Map<String, List<String>>> map = queryResponse.getHighlighting();
                for (Map.Entry<String, Map<String, List<String>>> highlighting : map.entrySet()) {
                    for (Foo foo : foos) {
                        if (!highlighting.getKey().equals(foo.getId().toString())) {
                            continue;
                        }
                        foo.setTitle(StringUtils.join(highlighting.getValue().get("title"), ""));
                        break;
                    }
                }
            }
    
            return foos;
        }
    
    }

### 4、编写单元测试用例 ###

package com.kang.solrj.service;
    
    import java.util.Arrays;
    import java.util.List;
    
    import org.apache.solr.client.solrj.impl.HttpSolrServer;
    import org.apache.solr.client.solrj.impl.XMLResponseParser;
    import org.junit.Before;
    import org.junit.Test;
    
    import com.kang.solrj.pojo.Foo;
    
    public class SolrjServiceTest {
        
    
        private SolrjService solrjService;
    
        private HttpSolrServer httpSolrServer;
    
        @Before
        public void setUp() throws Exception {
            // 在url中指定core名称：enjoyshop
            String url = "http://solr.enjoyshop.com/enjoyshop";
            HttpSolrServer httpSolrServer = new HttpSolrServer(url); //定义solr的server
            httpSolrServer.setParser(new XMLResponseParser()); // 设置响应解析器
            httpSolrServer.setMaxRetries(1); // 设置重试次数，推荐设置为1
            httpSolrServer.setConnectionTimeout(500); // 建立连接的最长时间
    
            this.httpSolrServer = httpSolrServer;
            solrjService = new SolrjService(httpSolrServer);
        }
    
        @Test
        public void testAdd() throws Exception {
            Foo foo = new Foo();
            foo.setId(System.currentTimeMillis() + "");
            foo.setTitle("轻量级Java EE企业应用实战（第3版）：Struts2＋Spring3＋Hibernate整合开发（附CD光盘）");
    
            this.solrjService.add(foo);
        }
    
        @Test
        public void testDelete() throws Exception {
            this.solrjService.delete(Arrays.asList("1416537175446"));
        }
    
        @Test
        public void testSearch() throws Exception {
            List<Foo> foos = this.solrjService.search("linux", 1, 10);
            for (Foo foo : foos) {
                System.out.println(foo);
            }
        }
    
        @Test
        public void testDeleteByQuery() throws Exception{
            httpSolrServer.deleteByQuery("*:*");
            httpSolrServer.commit();
        }
    
    }

## 三、使用Solrj完成数据的批量导入 ##

系统接口的URL为：

http://manage.enjoyshop.com/rest/item?page={page}&rows=100

其中的page为当前页数。  
返回的数据格式如下：

{"total":3093,"rows":[{"created":1495638218000,"updated":1495638218000,"id":1474391933,"title":"魅族","sellPoint":"按时到岗","price":2222200,"num":2222,"barcode":"222222","image":"http://image.enjoyshop.com/images/2017/05/24/2017052411030281105445.jpg","cid":560,"status":1},{"created":1495611140000,"updated":1495630686000,"id":1474391932,"title":"sadsadghhs","sellPoint":"testtetstts","price":22220,"num":333,"barcode":"34444","image":"http://image.enjoyshop.com/images/2017/05/24/2017052403321398508674.jpg","cid":3,"status":1},{"created":1495549388000,"updated":1495549388000,"id":1474391931,"title":"ssdas","sellPoint":"asdasd","price":22200,"num":222,"barcode":"222","image":"","cid":12,"status":1},{"created":1493037017000,"updated":1493037017000,"id":1474391929,"title":"test","sellPoint":"good","price":22200,"num":333,"barcode":"4444","image":"http://image.enjoyshop.com/images/2017/04/24/2017042408295162105014.jpg","cid":76,"status":1},{"created":1492591744000,"updated":1492591829000,"id":1474391928,"title":"java编程思想哈哈哈哈","sellPoint":"好好好","price":22200,"num":333,"barcode":"66666","image":"http://image.enjoyshop.com/images/2017/04/19/2017041904480598606613.jpg","cid":3,"status":1}]}

批量导入代码：

package com.kang.solrj.service;
    
    import java.util.List;
    
    import org.apache.commons.lang3.StringUtils;
    import org.apache.http.client.methods.CloseableHttpResponse;
    import org.apache.http.client.methods.HttpGet;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.impl.client.HttpClients;
    import org.apache.http.util.EntityUtils;
    import org.apache.solr.client.solrj.impl.HttpSolrServer;
    import org.apache.solr.client.solrj.impl.XMLResponseParser;
    import org.junit.Before;
    import org.junit.Test;
    
    import com.fasterxml.jackson.databind.JsonNode;
    import com.fasterxml.jackson.databind.ObjectMapper;
    import com.kang.solrj.pojo.Item;
    
    public class ItemDataImportTest {
    
        private HttpSolrServer httpSolrServer;
    
        private static final ObjectMapper MAPPER = new ObjectMapper();
    
        @Before
        public void setUp() throws Exception {
            // 在url中指定core名称：enjoyshop
            // http://solr.enjoyshop.com/#/enjoyshop -- 界面操作
            String url = "http://solr.enjoyshop.com/enjoyshop"; // 服务地址
            HttpSolrServer httpSolrServer = new HttpSolrServer(url); // 定义solr的server
            httpSolrServer.setParser(new XMLResponseParser()); // 设置响应解析器
            httpSolrServer.setMaxRetries(1); // 设置重试次数，推荐设置为1
            httpSolrServer.setConnectionTimeout(500); // 建立连接的最长时间
    
            this.httpSolrServer = httpSolrServer;
        }
    
        @Test
        public void testData() throws Exception {
            // 通过后台系统的接口查询商品数据
            String url = "http://manage.enjoyshop.com/rest/item?page={page}&rows=100";
            int page = 1;
            int pageSzie = 0;
            do {
                String u = StringUtils.replace(url, "{page}", "" + page);
                System.out.println(u);
                String jsonData = doGet(u);
                JsonNode jsonNode = MAPPER.readTree(jsonData);
                String rowsStr = jsonNode.get("rows").toString();
                List<Item> items = MAPPER.readValue(rowsStr,
                        MAPPER.getTypeFactory().constructCollectionType(List.class, Item.class));
                pageSzie = items.size();
                this.httpSolrServer.addBeans(items);
                this.httpSolrServer.commit();
    
                page++;
            } while (pageSzie == 100);
    
        }
    
        private String doGet(String url) throws Exception {
            // 创建Httpclient对象
            CloseableHttpClient httpclient = HttpClients.createDefault();
    
            // 创建http GET请求
            HttpGet httpGet = new HttpGet(url);
    
            CloseableHttpResponse response = null;
            try {
                // 执行请求
                response = httpclient.execute(httpGet);
                // 判断返回状态是否为200
                if (response.getStatusLine().getStatusCode() == 200) {
                    return EntityUtils.toString(response.getEntity(), "UTF-8");
                }
            } finally {
                if (response != null) {
                    response.close();
                }
                httpclient.close();
            }
            return null;
        }
    
    }

## 四、Spring整合Solrj ##

首先建立一个外部属性文件用来定义Solr的相关参数

solr.url=http://solr.enjoyshop.com/enjoyshop
    solr.maxRetries=1
    solr.connectionTimeout=500

然后配置Spring的XML文件

这里只是简单的示例，具体可参考相关源码进行配置。

## 五、源码Demo[点我][Link 1] ##

[Link 1]: https://github.com/xiaokangjack/Solrj_DEMO