Solr之java实现增删查操作

1、添加pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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.yangwj</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.M1</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.solr/solr-solrj -->
        <dependency>
            <groupId>org.apache.solr</groupId>
            <artifactId>solr-solrj</artifactId>
            <version>7.7.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpmime -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
            <version>4.5.7</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.6</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.4.10</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.noggit/noggit -->
        <dependency>
            <groupId>org.noggit</groupId>
            <artifactId>noggit</artifactId>
            <version>0.8</version>
        </dependency>

        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
       <groupId>org.codehaus.woodstox</groupId>
            <artifactId>stax2-api</artifactId>
            <version>3.1.4</version>
        </dependency>
        <dependency>
            <groupId>org.codehaus.woodstox</groupId>
            <artifactId>woodstox-core-asl</artifactId>
            <version>4.4.1</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.7.7</version>
        </dependency>
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.0.4</version>
        </dependency>

    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>


</project>

2、创建Person.java类

package com.yangwj.demo.Solr;

import org.apache.solr.client.solrj.beans.Field;
public class Person {

    @Field(value="id")
    private String id;

    @Field(value="name")
    private String name;

    @Field(value="description")
    private String description;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

}

3、创建SolrUtil.java文件

package com.yangwj.demo.Solr;

import java.io.IOException;
import java.util.List;

import org.apache.solr.client.solrj.SolrQuery;
import org.apache.solr.client.solrj.SolrServerException;
import org.apache.solr.client.solrj.impl.HttpSolrClient;
import org.apache.solr.client.solrj.impl.HttpSolrClient.Builder;
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;


public class SolrUtil {
    //指定solr服务器的地址
    private final static String SOLR_URL = "http://192.168.56.130:8983/solr/";

    /**
     * 创建SolrServer对象
     *
     * 该对象有两个可以使用，都是线程安全的
     * 1、CommonsHttpSolrServer：启动web服务器使用的，通过http请求的
     * 2、 EmbeddedSolrServer：内嵌式的，导入solr的jar包就可以使用了
     * 3、solr 4.0之后好像添加了不少东西，其中CommonsHttpSolrServer这个类改名为HttpSolrClient
     *
     * @return
     */
    public HttpSolrClient createSolrServer(){
        HttpSolrClient solr = null;
        solr = new HttpSolrClient.Builder(SOLR_URL).withConnectionTimeout(10000).withSocketTimeout(60000).build();
        return solr;
    }


    /**
     * 往索引库添加文档
     * @throws IOException
     * @throws SolrServerException
     */
    public void addDoc() throws SolrServerException, IOException{
        //构造一篇文档
        SolrInputDocument document = new SolrInputDocument();
        //往doc中添加字段,在客户端这边添加的字段必须在服务端中有过定义
        document.addField("id", "9");
        document.addField("name", "yangwenjie");
        document.addField("description", "a code man");
        //获得一个solr服务端的请求，去提交  ,选择具体的某一个solr core
        HttpSolrClient solr = new HttpSolrClient.Builder(SOLR_URL + "new_core").withConnectionTimeout(10000).withSocketTimeout(60000).build();
        solr.add(document);
        solr.commit();
        solr.close();
    }


    /**
     * 根据id从索引库删除文档
     */
    public void deleteDocumentById() throws Exception {
        //选择具体的某一个solr core
        HttpSolrClient server = new HttpSolrClient.Builder(SOLR_URL + "new_core").withConnectionTimeout(10000).withSocketTimeout(60000).build();
        //删除文档
        server.deleteById("8");
        //删除所有的索引
        //solr.deleteByQuery("*:*");
        //提交修改
        server.commit();
        server.close();
    }

    /**
     * 查询
     * @throws Exception
     */
    public void querySolr() throws Exception{
        HttpSolrClient solrServer = new HttpSolrClient.Builder(SOLR_URL + "new_core/").withConnectionTimeout(10000).withSocketTimeout(60000).build();
        SolrQuery query = new SolrQuery();
        //下面设置solr查询参数
        //query.set("q", "*:*");// 参数q  查询所有
        query.set("q","yangwenjie");//相关查询，比如某条数据某个字段含有周、星、驰三个字  将会查询出来 ，这个作用适用于联想查询

        //参数fq, 给query增加过滤查询条件
        query.addFilterQuery("id:[0 TO 9]");//id为0-4

        //给query增加布尔过滤条件
        //query.addFilterQuery("description:演员");  //description字段中含有“演员”两字的数据

        //参数df,给query设置默认搜索域
        query.set("df", "name");

        //参数sort,设置返回结果的排序规则
        query.setSort("id",SolrQuery.ORDER.desc);

        //设置分页参数
        query.setStart(0);
        query.setRows(10);//每一页多少值

        //参数hl,设置高亮
        query.setHighlight(true);
        //设置高亮的字段
        query.addHighlightField("name");
        //设置高亮的样式
        query.setHighlightSimplePre("<font color='red'>");
        query.setHighlightSimplePost("</font>");

        //获取查询结果
        QueryResponse response = solrServer.query(query);
        //两种结果获取：得到文档集合或者实体对象

        //查询得到文档的集合
        SolrDocumentList solrDocumentList = response.getResults();
        System.out.println("通过文档集合获取查询的结果");
        System.out.println("查询结果的总数量：" + solrDocumentList.getNumFound());
        //遍历列表
        for (SolrDocument doc : solrDocumentList) {
            System.out.println("id:"+doc.get("id")+"   name:"+doc.get("name")+"    description:"+doc.get("description"));
        }

        //得到实体对象
        List<Person> tmpLists = response.getBeans(Person.class);
        if(tmpLists!=null && tmpLists.size()>0){
            System.out.println("通过文档集合获取查询的结果");
            for(Person per:tmpLists){
                System.out.println("id:"+per.getId()+"   name:"+per.getName()+"    description:"+per.getDescription());
            }
        }
    }

    public static void main(String[] args) throws Exception {
        SolrUtil solr = new SolrUtil();
        //solr.createSolrServer();
        //solr.addDoc();
        //solr.deleteDocumentById();
        solr.querySolr();
    }
}

4、如果出现错误，一般是pom.xml中的jar包太低，因此需要更高版本的包。