SpringBoot集成Elasticsearch7.4 实战

Posted 2023-03-03 吳名氏

本篇文章主要讲的是:在Springboot环境下，管理数据

1. 数据管理

1.1. 新增数据

1.1.1. 单实例新增

http方式提交数据，案例中我将数据格式做了规范，提交过程中需要指定索引名，以及JSON格式数据，这样尽可能在实际过程中做到通用。

为此我用交互对象Vo来接受前端传递来的数据，再解析该Vo，获取要提交的目标索引。

• 后端接口实现

/**
    * @Description 新增数据
    * @param elasticDataVo
    * @return xyz.wongs.weathertop.base.message.response.ResponseResult
    * @throws
    * @date 2019/11/20 17:10
    */
@RequestMapping(value = "/add",method = RequestMethod.POST)
public ResponseResult add(@RequestBody ElasticDataVo elasticDataVo)
    ResponseResult response = getResponseResult();
    try 
        if(!StringUtils.isNotEmpty(elasticDataVo.getIdxName()))
            response.setCode(ResponseCode.PARAM_ERROR_CODE.getCode());
            response.setMsg("索引为空，不允许提交");
            response.setStatus(false);
            log.warn("索引为空");
            return response;
        
        ElasticEntity elasticEntity = new ElasticEntity();
        elasticEntity.setId(elasticDataVo.getElasticEntity().getId());
        elasticEntity.setData(elasticDataVo.getElasticEntity().getData());

        baseElasticService.insertOrUpdateOne(elasticDataVo.getIdxName(), elasticEntity);

     catch (Exception e) 
        response.setCode(ResponseCode.ERROR.getCode());
        response.setMsg("服务忙，请稍后再试");
        response.setStatus(false);
        log.error("插入数据异常，metadataVo=,异常信息=", elasticDataVo.toString(),e.getMessage());
    
    return response;

• ElasticDataVo类

package xyz.wongs.weathertop.palant.vo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import xyz.wongs.weathertop.base.entiy.ElasticEntity;

/**
 * @ClassName ElasticDataVo
 * @Description http交互Vo对象
 * @author [e-mail]
 * @Github <a>https://github.com/rothschil</a>
 * @date 2019/11/21 9:10
 * @Version 1.0.0
*/
@Data
@NoArgsConstructor
@AllArgsConstructor
public class ElasticDataVo<T> 

    /**
     * 索引名
     */
    private String idxName;
    /**
     * 数据存储对象
     */
    private ElasticEntity elasticEntity;

• ElasticEntity类

package xyz.wongs.weathertop.base.entiy;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import xyz.wongs.weathertop.base.persistence.mybatis.entity.BaseEntity;

import java.util.Map;

/**
 * @ClassName ElasticEntity
 * @Description  数据存储对象
 * @author [e-mail]
 * @Github <a>https://github.com/rothschil</a>
 * @date 2019/11/21 9:10
 * @Version 1.0.0
*/
@Data
@AllArgsConstructor
@NoArgsConstructor
public class ElasticEntity<T> 

    /**
     * 主键标识，用户ES持久化
     */
    private String id;

    /**
     * JSON对象，实际存储数据
     */
    private Map data;

• Postman提交

1.1.2. 批量提交

1.2. 条件查询

为了通用，我在web端也分装了一层Vo，为了演示需要我仅写一个 match 精确匹配的查询。

• 后端接口实现

/**
    * @Description
    * @param queryVo 查询实体对象
    * @return xyz.wongs.weathertop.base.message.response.ResponseResult
    * @throws
    * @date 2019/11/21 9:31
    */
@RequestMapping(value = "/get",method = RequestMethod.GET)
public ResponseResult get(@RequestBody QueryVo queryVo)

    ResponseResult response = getResponseResult();

    if(!StringUtils.isNotEmpty(queryVo.getIdxName()))
        response.setCode(ResponseCode.PARAM_ERROR_CODE.getCode());
        response.setMsg("索引为空，不允许提交");
        response.setStatus(false);
        log.warn("索引为空");
        return response;
    

    try 
        Class<?> clazz = ElasticUtil.getClazz(queryVo.getClassName());
        Map<String,Object> params = queryVo.getQuery().get("match");
        Set<String> keys = params.keySet();
        MatchQueryBuilder queryBuilders=null;
        for(String ke:keys)
            queryBuilders = QueryBuilders.matchQuery(ke, params.get(ke));
        
        if(null!=queryBuilders)
            SearchSourceBuilder searchSourceBuilder = ElasticUtil.initSearchSourceBuilder(queryBuilders);
            List<?> data = baseElasticService.search(queryVo.getIdxName(),searchSourceBuilder,clazz);
            response.setData(data);
        
     catch (Exception e) 
        response.setCode(ResponseCode.ERROR.getCode());
        response.setMsg("服务忙，请稍后再试");
        response.setStatus(false);
        log.error("查询数据异常，metadataVo=,异常信息=", queryVo.toString(),e.getMessage());
    
    return response;

• QueryVo类

/** 查询Vo对象
 * @ClassName QueryVo
 * @Description 
 * @author [e-mail]
 * @Github <a>https://github.com/rothschil</a>
 * @date 2019/10/25 23:16
 * @Version 1.0.0
*/
@Data
@NoArgsConstructor
@AllArgsConstructor
public class QueryVo 

    /**
     * 索引名
     */
    private String idxName;
    /**
     * 需要反射的实体类型，用于对查询结果的封装
     */
    private String className;
    /**
     * 具体条件
     */
    private Map<String,Map<String,Object>> query;

• Postman提交

1.3. 删除数据

1.3.1. 单实例删除

/**
    * @Description 删除
    * @param elasticDataVo
    * @return xyz.wongs.weathertop.base.message.response.ResponseResult
    * @throws
    * @date 2019/11/21 9:56
    */
@RequestMapping(value = "/delete",method = RequestMethod.POST)
public ResponseResult delete(@RequestBody ElasticDataVo elasticDataVo)
    ResponseResult response = getResponseResult();
    try 
        if(!StringUtils.isNotEmpty(elasticDataVo.getIdxName()))
            response.setCode(ResponseCode.PARAM_ERROR_CODE.getCode());
            response.setMsg("索引为空，不允许提交");
            response.setStatus(false);
            log.warn("索引为空");
            return response;
        
        baseElasticService.deleteOne(elasticDataVo.getIdxName(),elasticDataVo.getElasticEntity());
     catch (Exception e) 
        e.printStackTrace();
    
    return response;

2.相关章节

一、SpringBoot集成Elasticsearch7.4 实战（一）

二、SpringBoot集成Elasticsearch7.4 实战（二）

三、SpringBoot集成Elasticsearch7.4 实战（三）