阅读文本大概需要3分钟。
1、 查看Index
创建Index时method使用PUT，查看Index时method使用GET
/**
* 查看api信息
*
* @throws Exception
*/
public static void lookIndex(RestClient client) {
String method = "GET";
Stringendpoint = "/book";
try {
Request request = new Request(method, endpoint);
Response response= client.performRequest(request);
System.out.println(EntityUtils.toString(response.getEntity()));
}catch (Exception e) {
e.printStackTrace();
}
}运行后结果如下：
{
"book": {
"aliases": { },
"mappings": { },
"settings": {
"index": {
"creation_date": "1561263334053",
"number_of_shards": "5",
"number_of_replicas": "1",
"uuid": "mEeGPmbRR2Cc3Rg6mK4YCA",
"version": {
"created": "5061399"
},
"provided_name": "book"
}
}
}
}2、 添加文档
构造一个Model对象
package es;
import java.util.Date;
public class ItBook {
private String name;
private String writer;
private int count;
private Date publishDate;
// 省略 get set
}创建基于该模型的Document
public static void addDocument(RestClient client) {
try{
String method = "PUT";
String endpoint = "/book/it/1"; // 索引：图书【DB】 类型：小说【table】 文档：【表里的数据】
ItBook book = new ItBook();
book.setName("三国演义");
book.setWriter("张飞");
book.setCount(10);
book.setPublishDate(new Date());
String jsonStr = JSON.toJSONString(book);
// JSON格式字符串
HttpEntity entity = new NStringEntity(jsonStr, ContentType.APPLICATION_JSON);
Request request = new Request(method, endpoint);
request.setEntity(entity);
Response response = client.performRequest(request);
System.out.println(EntityUtils.toString(response.getEntity()));
System.out.println("新增文档结束！！！");
}catch (Exception e) {
e.printStackTrace();
}
}测试返回结果
{
"_index": "book",
"_type": "it",
"_id": "1",
"_version": 1,
"result": "created",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"created": true
}3、 查询文档
根据ID查询文档
public static void queryDocument(RestClient client) {
try{
String method = "GET";
String endpoint = "/book/it/1";
Request request = new Request(method, endpoint);
Response response = client.performRequest(request);
System.out.println(EntityUtils.toString(response.getEntity()));
System.out.println("查询文档结束！！！");
}catch (Exception e) {
e.printStackTrace();
}
}测试结果
{
"_index": "book",
"_type": "it",
"_id": "1",
"_version": 1,
"found": true,
"_source": {
"count": 10,
"name": "三国演义",
"publishDate": 1561471991012,
"writer": "张飞"
}
}返回的json字符串可以使用json类库转换成对象，例如使用fastjson。
查询所有it的文档
public static void queryAll(RestClient client) {
try{
String method = "POST";
String endpoint = "/book/it/_search";
HttpEntity entity = new NStringEntity("{n" +
" "query": {n" +
" "match_all": {}n" +
" }n" +
"}", ContentType.APPLICATION_JSON);
Request request = new Request(method, endpoint);
request.setEntity(entity);
Response response = client.performRequest(request);
System.out.println(EntityUtils.toString(response.getEntity()));
System.out.println("查询所有数据:queryAll ！！！");
}catch (Exception e) {
e.printStackTrace();
}
}测试结果：
{
"took": 441,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 1,
"max_score": 1,
"hits": [
{
"_index": "book",
"_type": "it",
"_id": "1",
"_score": 1,
"_source": {
"count": 10,
"name": "三国演义",
"publishDate": 1561471991012,
"writer": "张飞"
}
}
]
}
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