一、环境配置

所需要的jar包： org.apache.solr.solr-solrj

maven依赖：

<!-- https://mvnrepository.com/artifact/org.apache.solr/solr-solrj -->
<dependency>
    <groupId>org.apache.solr</groupId>
    <artifactId>solr-solrj</artifactId>
    <version>7.7.2</version>
</dependency>

二、教程

solr查询方法：

/**
 * 执行solr查询
 * @param query SolrQuery
 * @param pageNo 页码
 * @param pageSize 页面数据大小
 * @param orderBy 排序
 * @return Map<String, Object>
 */
public Map<String, Object> getSolrQuery(String query, String pageNo, String pageSize, String orderBy){
    SolrQuery solrQuery = new SolrQuery();
    solrQuery.set(CommonParams.Q, query);
    Map<String, Object> map = Maps.newHashMap();
    map.put("total", 0);
    map.put("rows", Collections.emptyList());
    try {
        Integer no = PageUtils.parseNo(pageNo);
        Integer size = PageUtils.parseSize(pageSize);
        Integer offset = PageUtils.getOffset(no, size);
        solrQuery.setStart(offset);
        solrQuery.setRows(size);
        setOrder(solrQuery, orderBy);
        //执行查询并返回结果
        QueryResponse resp = solrClient.query(solrQuery);
        SolrDocumentList results = resp.getResults();
        //获取查询到的数据总量
        long numFound = results.getNumFound();
        if(numFound <= 0) {
            return map;
        }else {
            map.put("total", numFound);
            map.put("rows", convert(results));
            return map;
        }
    } catch (Exception e) {
        LOGGER.error(e.getMessage(), e);
        return map;
    }
}

/**
 * 设置排序方式
 * 
 * @param solrQuery SolrQuery
 * @param orderBy 排序字段 example:name desc
 */
private void setOrder(SolrQuery solrQuery, String orderBy) {
    if(VerifyUtils.isEmpty(orderBy)) {
        return;
    }
    String[] split = orderBy.split(SPACE);
    if("asc".equals(split[1].toLowerCase())) {
        solrQuery.setSort(split[0], ORDER.asc);
    }else {
        solrQuery.setSort(split[0], ORDER.desc);
    }
}