【ES】JavaAPI学习-03

前言

本节实现文档的新增，修改

实现

User.java

package com.zwy.es;

public class User {

    private String name;

    private String sex;

    private Integer age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}

ESTest_Doc_Insert.java

package com.zwy.es;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.http.HttpHost;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.indices.GetIndexRequest;
import org.elasticsearch.client.indices.GetIndexResponse;
import org.elasticsearch.common.xcontent.XContentType;

import java.io.IOException;

public class ESTest_Doc_Insert {
    public static void main(String[] args) throws IOException {

        //
        RestHighLevelClient esClient = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );

        // 插入数据
        IndexRequest request = new IndexRequest();
        request.index("users").id("1001");

        // 定义数据对象
        User user = new User();
        user.setName("张三");
        user.setAge(30);
        user.setSex("男");

        // 向ES插入数据，必须将数据转换为JSON格式
        ObjectMapper mapper = new ObjectMapper();
        String userJson = mapper.writeValueAsString(user);
        request.source(userJson, XContentType.JSON);  // 将数据放进request中，并告知数据类型

        IndexResponse response = esClient.index(request, RequestOptions.DEFAULT);

        System.out.println(response.getResult());

        // 关闭ES客户端
        esClient.close();

    }
}

ESTest_Doc_Update.java

package com.zwy.es;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.http.HttpHost;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;

import java.io.IOException;

public class ESTest_Doc_Update {
    public static void main(String[] args) throws IOException {

        //
        RestHighLevelClient esClient = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );

        // 插入数据
        UpdateRequest request = new UpdateRequest();
        request.index("users").id("1001");
        request.doc(XContentType.JSON, "sex", "女");  // 修改文档数据

        UpdateResponse response = esClient.update(request, RequestOptions.DEFAULT);

        System.out.println(response.getResult());

        // 关闭ES客户端
        esClient.close();

    }
}

文件结构

文件结构如下：

运行

运行 ESTest_Doc_Insert.java：

然后打开POSTMAN，定义一个GET 请求，地址为我们刚刚定义的

http://127.0.0.1:9200/users/_doc/1001

然后发送请求有：

查询成功！

运行 ESTest_Doc_Update.java

修改成功，POSTMAN发送请求：

此时张三修改为了女。