一个网站是如何建设/qq群怎么优化排名靠前

1. 准备数据库对象

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;@Data
@NoArgsConstructor
@AllArgsConstructor
@TableName("tb_hotel")
public class Hotel {@TableId(type = IdType.INPUT)private Long id;private String name;private String address;private Integer price;private Integer score;private String brand;private String city;private String starName;private String business;private String latitude;private String longitude;private String pic;
}

2. 准备文档对象

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;/*** 与索引库的doc保持一致*/
@Data
@NoArgsConstructor
@AllArgsConstructor
@TableName("tb_hotel")
public class HotelDoc {@TableId(type = IdType.INPUT)private Long id;private String name;private String address;private Integer price;private Integer score;private String brand;private String city;private String starName;private String business;private String location;    //地理坐标private String pic;public HotelDoc(Hotel hotel){this.id = hotel.getId();this.name = hotel.getName();this.address = hotel.getAddress();this.price = hotel.getPrice();this.score = hotel.getScore();this.brand = hotel.getBrand();this.city = hotel.getCity();this.starName = hotel.getStarName();this.business = hotel.getBusiness();//整合地理对象和es中的mappings保持一致this.location = hotel.getLatitude() + "," + hotel.getLongitude();this.pic = hotel.getPic();}
}

3. 向es中插入数据

//向es中插入数据@GetMapping("inserDoc")public void inserDoc() throws IOException {List<Hotel> hotels = hotelMapper.selectList(null);for (int i = 0; i < hotels.size(); i++) {//doc准备Hotel hotel = hotels.get(i);HotelDoc hotelDoc = new HotelDoc(hotel);//准备request对象IndexRequest request = new IndexRequest("hotel").id(hotel.getId().toString());//本人使用的是7.8.0版本，但是依赖用的是6.8.6，因此加入默认的type类型为:_doc,否则会插入失败request.type("_doc");//准备json文档request.source(JSON.toJSONString(hotelDoc),XContentType.JSON);//发送请求restHighLevelClient.index(request,RequestOptions.DEFAULT);}}

4. 根据文档id查询文档记录

@GetMapping("getDocById")public void getDocById() throws IOException {//1. 创建request对象GetRequest request = new GetRequest("hotel");request.id("1");//doc = 1request.type("_doc");//2.发送请求GetResponse response = restHighLevelClient.get(request, RequestOptions.DEFAULT);String json = response.getSourceAsString();System.out.println(json);}

2023-06-23 13:14:21.142  INFO 11932 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 1 ms
{"address":"柳州东路1号","brand":"如家","business":"弘阳商圈","city":"南京市浦口区","id":1,"location":"33.33,131.33","name":"如家","pic":"http://www.bai.com/images/rujia.png","price":189,"score":7,"starName":"二星级"}
Disconnected from the target VM, address: '127.0.0.1:64333', transport: 'socket'

5 根据文档id更新文档

忍不了，升级了依赖到7.8.0

// 根据id修改数据@GetMapping("updateDocById")public void updateDocById() throws IOException {//1. 创建request对象UpdateRequest request = new UpdateRequest("hotel","1");request.doc("name","jack","age",22);//2.发送请求UpdateResponse update = restHighLevelClient.update(request, RequestOptions.DEFAULT);System.out.println(update.getResult());}

更新结果

2024-06-23 13:31:42.279  INFO 13972 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
2024-06-23 13:31:42.279  INFO 13972 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2024-06-23 13:31:42.281  INFO 13972 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 2 ms
UPDATED
2024-06-23 13:32:08.321 ERROR 13972 --- [rRegistryThread] c.xxl.job.core.util.XxlJobRemotingUtil   : Connection refused: connect

6 删除文档

//删除文档@GetMapping("delDocById")public void delDocById() throws IOException {//1. 创建request对象DeleteRequest request = new DeleteRequest("hotel","1");//2.发送请求DeleteResponse delete = restHighLevelClient.delete(request, RequestOptions.DEFAULT);System.out.println(delete.getResult());}

删除成功

2024-06-23 13:36:22.696  INFO 19580 --- [rRegistryThread] c.x.j.c.thread.ExecutorRegistryThread    : >>>>>>>>>>> xxl-job registry fail, registryParam:RegistryParam{registryGroup='EXECUTOR', registryKey='myXxlJob', registryValue='http://192.168.1.15:8088/'}, registryResult:ReturnT [code=500, msg=xxl-rpc remoting error(Connection refused: connect), for url : http://localhost:18080/xxl-job-admin/api/registry, content=null]
DELETED
2024-06-23 13:36:54.769 ERROR 19580 --- [rRegistryThread] c.xxl.job.core.util.XxlJobRemotingUtil   : Connection refused: connect

7 批量导入

//批量数据导入@GetMapping("batchInsert")public void batchInsert() throws IOException {List<Hotel> hotels = hotelMapper.selectList(null);BulkRequest request = new BulkRequest();for (int i = 0; i < hotels.size(); i++) {request.add(new IndexRequest("hotel").id(hotels.get(i).getId().toString()).source(JSON.toJSONString(hotels.get(i)),XContentType.JSON));}BulkResponse bulk = restHighLevelClient.bulk(request, RequestOptions.DEFAULT);System.out.println(bulk.status());System.out.println(bulk.getTook());}

插入成功

2024-06-23 13:45:46.866  WARN 13928 --- [nio-8080-exec-2] com.zaxxer.hikari.util.DriverDataSource  : Registered driver with driverClassName=com.mysql.jdbc.Driver was not found, trying direct instantiation.
2024-06-23 13:45:46.955  INFO 13928 --- [nio-8080-exec-2] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
OK
73ms
2024-06-23 13:45:58.035 ERROR 13928 --- [rRegistryThread] c.xxl.job.core.util.XxlJobRemotingUtil   : Connection refused: connect