Java操作elasticSearch索引保存数据

本文已参与「新人创作礼」活动，一起开启掘金创作之路。 Java操作elasticSearch索引保存数据

计划与实现：

存储一个新索引students，然后保存文档

借助Kibana:

GET /students/_search

结果：
{
  "error" : {
    "root_cause" : [
      {
        "type" : "index_not_found_exception",
        "reason" : "no such index [students]",
        "resource.type" : "index_or_alias",
        "resource.id" : "students",
        "index_uuid" : "_na_",
        "index" : "students"
      }
    ],
    "type" : "index_not_found_exception",
    "reason" : "no such index [students]",
    "resource.type" : "index_or_alias",
    "resource.id" : "students",
    "index_uuid" : "_na_",
    "index" : "students"
  },
  "status" : 404
}

索引不存在

单元测试

索引数据的请求是个网络操作，所以会有异常处理。

//做一个学生对象
	//注解后setter getter
	@Data
	class Student{
		private String name;
		private Integer age;
		private String gender;
	}

	@Test
	public void indexData() throws IOException {
		//索引
		IndexRequest indexRequest = new IndexRequest("students");
		//数据id 不设置会自动生成
		indexRequest.id("1");

		Student student = new Student();
		student.setAge(18);
		student.setGender("男");
		student.setName("张铁蛋");
		//对象转换json
		String jsonString = JSON.toJSONString(student);
		//索引对象加入对象json  声明保存形式
		indexRequest.source(jsonString, XContentType.JSON);
		//用容器中导入的client 调用请求  索引对象 和 配置参数 这个配置参数是整合配置时搞定的
		IndexResponse index = client.index(indexRequest, GuilimallElasticSearchConfig.COMMON_OPTIONS);
		//index为相应数据
		System.out.println(index);
	}

执行：

2021-11-05 16:01:28.219  INFO 1548 --- [           main] c.a.g.s.GulimallSearchApplicationTests   : Started GulimallSearchApplicationTests in 18.417 seconds (JVM running for 19.985)
IndexResponse[index=students,type=_doc,id=1,version=1,result=created,seqNo=0,primaryTerm=1,shards={"total":2,"successful":1,"failed":0}]
2021-11-05 16:01:32.019  INFO 1548 --- [       Thread-9] o.s.s.concurrent.ThreadPoolTaskExecutor  : Shutting down ExecutorService 'applicationTaskExecutor'

Process finished with exit code 0

在看一下Kibana:

GET /students/_search

结果集：

{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "students",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "age" : 18,
          "gender" : "男",
          "name" : "张铁蛋"
        }
      }
    ]
  }
}

保存成功