java springboot 结合elasticsearch 实现全文检索 的步骤，有坑请绕行

 

开启springboot项目

首先我这里选择的是jestClient操作elasticsearch

这里还有一种方式是通过

ElasticsearchRepostiry类似jpa的一种工具接口，但会随着ela的版本的修改而变化代码，所以首选jestClient

 

ok！第一步先导入依赖

org.springframework.boot

spring-boot-starter-data-elasticsearch

1.5.4.RELEASE

io.searchbox

jest

net.java.dev.jna

jna

 

这里需要注意 ①

springboot对应的elasticsearch的版本

这里sprigboot是1.5.4，ela依赖也是1.5.4

springboot 和elasticsearch 版本对应参照请看下面

https://www.cnblogs.com/xuwujing/p/8998168.html

 

第二步在application.properties中配置ela 服务地址连接上地址我们才能去调用服务

#elasticsearch
[email protected]@
spring.elasticsearch.jest.read-timeout=60000
spring.elasticsearch.jest.connection-timeout=60000

注:@elasticsearch.service@ 这个是从pom.xml文件中读取出来的

然后咱们需要去连接服务，咱们需要获取jestClient对象去操作查询

 

第三步获取jestClient对象的方式

package com.webi.welive.util;

import io.searchbox.client.JestClient;
import io.searchbox.client.JestClientFactory;
import io.searchbox.client.config.HttpClientConfig;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

/**
 * Title: 获取jestClient对象

 * Description: JestClientUtil

 * Company:韦博英语在线教育部

 * CreateDate:2018年06月14日 14:29
 *
 * @author james.fxy
 */
@Service
public class JestClientUtil {

    private static String spring_elasticsearch_jest_uris;
    private static Integer spring_elasticsearch_jest_read_timeout;
    private static Integer Spring_elasticsearch_jest_connection_timeout;

    @Value("${spring.elasticsearch.jest.uris}")
    public void setSpring_elasticsearch_jest_uris(String spring_elasticsearch_jest_uris) {
        JestClientUtil.spring_elasticsearch_jest_uris = spring_elasticsearch_jest_uris;
    }

    @Value("${spring.elasticsearch.jest.read-timeout}")
    public void setSpring_elasticsearch_jest_read_timeout(Integer spring_elasticsearch_jest_read_timeout) {
        JestClientUtil.spring_elasticsearch_jest_read_timeout = spring_elasticsearch_jest_read_timeout;
    }

    @Value("${spring.elasticsearch.jest.connection-timeout}")
    public void setGetSpring_elasticsearch_jest_connection_timeout(Integer Spring_elasticsearch_jest_connection_timeout) {
        JestClientUtil.Spring_elasticsearch_jest_connection_timeout = Spring_elasticsearch_jest_connection_timeout;
    }

    /**
     * Title: 获取jestClient

     * Description: 

     * CreateDate: 2018/6/14 16:31

     *
     * @param
     * @return
     * @throws Exception
     * @category 获取jestClient
     * @author james.fxy
     */
    public static JestClient getJestClient() {
        JestClientFactory factory = new JestClientFactory();
        factory.setHttpClientConfig(new HttpClientConfig.Builder(spring_elasticsearch_jest_uris).connTimeout(Spring_elasticsearch_jest_connection_timeout).readTimeout(spring_elasticsearch_jest_read_timeout).multiThreaded(true).build());
        return factory.getObject();
    }
}

第四步我们使用jestClient操作elasticsearch

① 选择我们需要操作的实体类

package com.webi.welive.lessonhomework.param;


import com.webi.welive.lessonhomework.entity.HomeworkAnswerMedia;
import com.webi.welive.lessonhomework.entity.HomeworkQuestionAnswer;
import com.webi.welive.lessonhomework.entity.HomeworkQuestionMedia;
import lombok.Data;
import org.springframework.data.elasticsearch.annotations.Document;

import java.util.Date;
import java.util.List;


/**
 * Title: LessonHomeworkParam

 * Description: LessonHomeworkParam

 * Company: 韦博英语在线教育部

 * CreateDate:2018年6月9日 上午11:39:42
 *
 * @author james.fxy
 */
@Data
@Document(indexName = "homework", type = "homeworktable")
public class LessonHomeworkParam {

  private Integer id;
    private String question;
  private String explain;
  private Boolean isEnabled;
  private Boolean isDeleted;
    private Integer createUserId;
    private Integer sequence;
  private Integer questionTypes;
  private HomeworkQuestionMediaParam homeworkQuestionsMediaParam;
  private List homeworkQuestionAnswerParamList;
    public LessonHomeworkParam() {
        super();
    }

}

注:@Document(indexName = "homework", type = "homeworktable") 

    indexName h和type分别对应着你在往elasticsearch导入数据时设置的

我在导入数据时是这样设置的如下:

input {
    jdbc {
      jdbc_connection_string => "jdbc:sqlserver://10.0.0.130:1433;databaseName=Webi_WeLiveDBTest;"
      jdbc_user => "speakhi_user"
      jdbc_password => "speakhi_user123"
      jdbc_driver_library => "/usr/share/logstash/mssql-jdbc-6.2.1.jre8.jar"
      jdbc_driver_class => "com.microsoft.sqlserver.jdbc.SQLServerDriver"
      jdbc_paging_enabled => "true"
      statement => "SELECT * from Lesson_Homework where CreateTime < GETDATE()"
      schedule => "* * * * *"
      type => "lesson_homework"
    }
   
output {
 stdout {
                codec => rubydebug
    }
    if[type] == "lesson_homework"{
        elasticsearch {
        hosts  => "10.0.0.13:9200"
        index => "homework"
        document_type => "homeworktable"
        document_id => "%{id}"
        }
    }
    
}

 

可以看到我在导入elasticsearch导入的数据配置的indexName和type对应实体类中的document

 

② 使用jestclient操作查询语句

 

字符串拼接以后执行，根据官网的文档来的

https://www.elastic.co/blog/found-java-clients-for-elasticsearch

具体的拼接数据方式可以参考如下

https://segmentfault.com/a/1190000004429689

获取数据的方式解析方式有两种

https://blog.csdn.net/u011781521/article/details/77853824

我这里使用了手动解析的方式，因为发现自动解析不好用

注:因为数据在导入elasticsearch的时候类型会是通过jackJson序列化过去的

我们在解析数据的时候需要保持参数类型是从elasticsearch过来的

/**
   * Title: 

   * Description: 使用全文检索查询课程信息(添加过滤条件根据question查询)

   * CreateDate: 2018/6/14 14:47

   *
   * @param query
   * @return com.mingyisoft.javabase.bean.CommonJsonObject
   * @throws Exception
   * @category @author james.fxy
   */
  public CommonJsonObject