引入maven依赖
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>rest</artifactId>
<version>5.5.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.2.4</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency |
public class ElTest {
private static RestClient restClient;
private static Gson gson = new Gson();
/**
* 初始化RestClient
*/
@Before
public void initRestClient(){
restClient = RestClient.builder(
new HttpHost("139.199.119.214", 9200, "http")).build();
}
/**
* 创建索引(id自己设置，PUT请求)
*/
@Test
public void testCreateIndex() throws Exception{
User user = new User();
user.setId(100L);
user.setAge(20);
user.setName("张三100");
user.setSex(1);
HttpEntity entity = new NStringEntity(gson.toJson(user), ContentType.APPLICATION_JSON);
Response indexResponse = restClient.performRequest(
"PUT",
"userindex/user/100",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(indexResponse.getEntity()));
}
/**
* 创建索引(id自动生成，POST请求)
*/
@Test
public void testCreateIndex2() throws Exception{
User user = new User();
user.setAge(20);
user.setName("张三");
user.setSex(1);
HttpEntity entity = new NStringEntity(gson.toJson(user), ContentType.APPLICATION_JSON);
Response indexResponse = restClient.performRequest(
"POST",
"userindex/user/",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(indexResponse.getEntity()));
}
/**
* 根据id查询
* @throws Exception
*/
@Test
public void testFindById() throws Exception{
String DSL ="{\n" +
" \"query\": {\n" +
" \"match\" : {\n" +
" \"id\" : \"100\"\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"GET",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
InputStream content = response.getEntity().getContent();
System.out.println("@@@liu"+content.toString());
Header[] headers = response.getHeaders();
for (Header header:headers){
System.out.println("@@@name"+header.getName());
System.out.println("@@@value"+header.getValue());
}
/*byte[] b = new byte[1024];
int lenth = 0;
while ((lenth=content.read())!=-1){
int read = content.read(b, 0, lenth);
System.out.println("!!!"+new String(b,0,read));
}*/
System.out.println("!!!"+IOUtils.toString(content,"UTF-8"));
}
/**
* (查询特定字段用户)
* @throws Exception
*/
@Test
public void testFindByKey() throws Exception{
String DSL ="{\n" +
" \"query\": {\n" +
" \"match\" : {\n" +
" \"name\" : \"张1\"\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"GET",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 查询所有(默认返回10条记录)
*/
@Test
public void findAll() throws Exception{
String DSL = "{\n" +
" \"query\": { \"match_all\": {} }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"GET",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* match_all & 返回11到20个文档信息
* from：指定文档索引从哪里开始，默认从0开始
size：从from开始，返回多个文档
*/
@Test
public void findByPage() throws Exception{
String DSL = "{\n" +
" \"query\": { \"match_all\": {} },\n" +
" \"from\": 10,\n" +
" \"size\": 10\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 根据年龄降序排序查询.默认返回10条
*/
@Test
public void findAllByAgeOderBy() throws Exception{
String DSL = "{\n" +
" \"query\": { \"match_all\": {} },\n" +
" \"sort\": { \"age\": { \"order\": \"desc\" } }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 查询返回指定的字段（这样操作有点类似于SQL SELECT FROM field lis）
*/
@Test
public void findByLimitField() throws Exception{
String DSL = "{\n" +
" \"query\": { \"match_all\": {} },\n" +
" \"_source\": [\"name\", \"age\"]\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 布尔值(bool)查询(返回 匹配name=张1 & age=21)
*/
@Test
public void findByMustBool() throws Exception{
String DSL = "{\n" +
" \"query\": {\n" +
" \"bool\": {\n" +
" \"must\": [\n" +
" { \"match\": { \"name\": \"张1\" } },\n" +
" { \"match\": { \"age\": \"21\" } }\n" +
" ]\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 布尔值(bool)查询(返回 匹配name=张1 || age=21)
*/
@Test
public void findByOrBool() throws Exception{
String DSL = "{\n" +
" \"query\": {\n" +
" \"bool\": {\n" +
" \"should\": [\n" +
" { \"match\": { \"name\": \"张1\" } },\n" +
" { \"match\": { \"age\": \"21\" } }\n" +
" ]\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 布尔值(bool)查询(返回 不匹配name=张1 & age=21)
*/
@Test
public void findByMachNotBool() throws Exception{
String DSL = "{\n" +
" \"query\": {\n" +
" \"bool\": {\n" +
" \"must_not\": [\n" +
" { \"match\": { \"name\": \"张1\" } },\n" +
" { \"match\": { \"age\": \"21\" } }\n" +
" ]\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 布尔值(bool)查询(返回 name=张1 & age!=21)
*/
@Test
public void findByMachAndNotBool() throws Exception{
String DSL = "{\n" +
" \"query\": {\n" +
" \"bool\": {\n" +
" \"must\": [\n" +
" { \"match\": { \"name\": \"张1\" } }\n" +
" ],\n" +
" \"must_not\": [\n" +
" { \"match\": { \"age\": \"21\" } }\n" +
" ]\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 范围查询(age在25到28岁之间)
*/
@Test
public void findByRang() throws Exception{
String DSL = "{\n" +
" \"query\": {\n" +
" \"range\" : {\n" +
" \"age\" : {\n" +
" \"gte\" : 25,\n" +
" \"lte\" : 28,\n" +
" \"boost\" : 2.0\n" +
" }\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"GET",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 分组查询(按年龄分组查询，降序统计top 10)
*类似 SELECT age, COUNT(*) FROM user GROUP BY age ORDER BY COUNT(*) DESC
*/
@Test
public void findByGroup() throws Exception{
String DSL = "{\n" +
" \"size\": 0,\n" +
" \"aggs\": {\n" +
" \"group_by_age\": {\n" +
" \"terms\": {\n" +
" \"field\": \"age\"\n" +
" }\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 分组查询(按年龄分组查询，查询组里其他字段的平均值)
*类似 SELECT age, avg(age) FROM user GROUP BY age ORDER BY COUNT(*) DESC
*/
@Test
public void findByGroupAndAvag() throws Exception{
String DSL = "{\n" +
" \"size\": 0,\n" +
" \"aggs\": {\n" +
" \"group_by_age\": {\n" +
" \"terms\": {\n" +
" \"field\": \"age\"\n" +
" },\n" +
" \"aggs\": {\n" +
" \"average_age\": {\n" +
" \"avg\": {\n" +
" \"field\": \"age\"\n" +
" }\n" +
" }\n" +
" }\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 分组查询(按年龄分组查询，并且降序排序)
*类似 SELECT age, avg(age) FROM user GROUP BY age ORDER BY avg(age) DESC
*/
@Test
public void findByGroupAndOrderBy() throws Exception{
String DSL = "{\n" +
" \"size\": 0,\n" +
" \"aggs\": {\n" +
" \"group_by_age\": {\n" +
" \"terms\": {\n" +
" \"field\": \"age\",\n" +
" \"order\": {\n" +
" \"average_age\": \"desc\"\n" +
" }\n" +
" },\n" +
" \"aggs\": {\n" +
" \"average_age\": {\n" +
" \"avg\": {\n" +
" \"field\": \"age\"\n" +
" }\n" +
" }\n" +
" }\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 删除操作
*/
@Test
public void testDelete() throws Exception{
Response response = restClient.performRequest(
"DELETE",
"userindex/user/100",
Collections.<String, String>emptyMap());
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 根据条件删除（使用_delete_by_query,POST请求）
*/
@Test
public void testDeleteByQuery()throws Exception{
String DSL ="{\n" +
" \"query\": {\n" +
" \"match\" : {\n" +
" \"name\" : \"张1\"\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_delete_by_query",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 跟新操作(1. 从旧文档中检索JSON
2. 修改它
3. 删除旧文档
4. 索引新文档)
*/
@Test
public void testUpdate() throws Exception{
User user = new User();
user.setId(100L);
user.setAge(20);
user.setName("张三修改");
user.setSex(1);
HttpEntity entity = new NStringEntity(gson.toJson(user), ContentType.APPLICATION_JSON);
Response indexResponse = restClient.performRequest(
"PUT",
"userindex/user/100",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(indexResponse.getEntity()));
}
/**
* 局部跟新字段(动态添加字段，添加tags和views字段)
*/
@Test
public void testUpdateField() throws Exception{
String DSL ="{\n" +
" \"doc\" : {\n" +
" \"tags\" : [ \"testing\" ],\n" +
" \"views\": 0\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/100/_update",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 使用脚本部分跟新字段(将views字段数量加1)
*/
@Test
public void testUpdateFieldByScript() throws Exception{
String DSL ="{\n" +
" \"script\" : \"ctx._source.views+=1\"\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/100/_update",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 将search 标签追加到 tags 数组中
*/
@Test
public void testUpdateFieldAddByScript() throws Exception{
String DSL = "{\n" +
" \"script\" : \"ctx._source.tags+=new_tag\",\n" +
" \"params\" : {\n" +
" \"new_tag\" : \"search\"\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/100/_update",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
@After
public void closeRestClient() throws Exception{
restClient.close();
}
}
|
引入maven依赖
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>rest</artifactId>
<version>5.5.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.2.4</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency |
public class ElTest {
private static RestClient restClient;
private static Gson gson = new Gson();
/**
* 初始化RestClient
*/
@Before
public void initRestClient(){
restClient = RestClient.builder(
new HttpHost("139.199.119.214", 9200, "http")).build();
}
/**
* 创建索引(id自己设置，PUT请求)
*/
@Test
public void testCreateIndex() throws Exception{
User user = new User();
user.setId(100L);
user.setAge(20);
user.setName("张三100");
user.setSex(1);
HttpEntity entity = new NStringEntity(gson.toJson(user), ContentType.APPLICATION_JSON);
Response indexResponse = restClient.performRequest(
"PUT",
"userindex/user/100",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(indexResponse.getEntity()));
}
/**
* 创建索引(id自动生成，POST请求)
*/
@Test
public void testCreateIndex2() throws Exception{
User user = new User();
user.setAge(20);
user.setName("张三");
user.setSex(1);
HttpEntity entity = new NStringEntity(gson.toJson(user), ContentType.APPLICATION_JSON);
Response indexResponse = restClient.performRequest(
"POST",
"userindex/user/",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(indexResponse.getEntity()));
}
/**
* 根据id查询
* @throws Exception
*/
@Test
public void testFindById() throws Exception{
String DSL ="{\n" +
" \"query\": {\n" +
" \"match\" : {\n" +
" \"id\" : \"100\"\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"GET",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
InputStream content = response.getEntity().getContent();
System.out.println("@@@liu"+content.toString());
Header[] headers = response.getHeaders();
for (Header header:headers){
System.out.println("@@@name"+header.getName());
System.out.println("@@@value"+header.getValue());
}
/*byte[] b = new byte[1024];
int lenth = 0;
while ((lenth=content.read())!=-1){
int read = content.read(b, 0, lenth);
System.out.println("!!!"+new String(b,0,read));
}*/
System.out.println("!!!"+IOUtils.toString(content,"UTF-8"));
}
/**
* (查询特定字段用户)
* @throws Exception
*/
@Test
public void testFindByKey() throws Exception{
String DSL ="{\n" +
" \"query\": {\n" +
" \"match\" : {\n" +
" \"name\" : \"张1\"\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"GET",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 查询所有(默认返回10条记录)
*/
@Test
public void findAll() throws Exception{
String DSL = "{\n" +
" \"query\": { \"match_all\": {} }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"GET",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* match_all & 返回11到20个文档信息
* from：指定文档索引从哪里开始，默认从0开始
size：从from开始，返回多个文档
*/
@Test
public void findByPage() throws Exception{
String DSL = "{\n" +
" \"query\": { \"match_all\": {} },\n" +
" \"from\": 10,\n" +
" \"size\": 10\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 根据年龄降序排序查询.默认返回10条
*/
@Test
public void findAllByAgeOderBy() throws Exception{
String DSL = "{\n" +
" \"query\": { \"match_all\": {} },\n" +
" \"sort\": { \"age\": { \"order\": \"desc\" } }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 查询返回指定的字段（这样操作有点类似于SQL SELECT FROM field lis）
*/
@Test
public void findByLimitField() throws Exception{
String DSL = "{\n" +
" \"query\": { \"match_all\": {} },\n" +
" \"_source\": [\"name\", \"age\"]\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 布尔值(bool)查询(返回 匹配name=张1 & age=21)
*/
@Test
public void findByMustBool() throws Exception{
String DSL = "{\n" +
" \"query\": {\n" +
" \"bool\": {\n" +
" \"must\": [\n" +
" { \"match\": { \"name\": \"张1\" } },\n" +
" { \"match\": { \"age\": \"21\" } }\n" +
" ]\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 布尔值(bool)查询(返回 匹配name=张1 || age=21)
*/
@Test
public void findByOrBool() throws Exception{
String DSL = "{\n" +
" \"query\": {\n" +
" \"bool\": {\n" +
" \"should\": [\n" +
" { \"match\": { \"name\": \"张1\" } },\n" +
" { \"match\": { \"age\": \"21\" } }\n" +
" ]\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 布尔值(bool)查询(返回 不匹配name=张1 & age=21)
*/
@Test
public void findByMachNotBool() throws Exception{
String DSL = "{\n" +
" \"query\": {\n" +
" \"bool\": {\n" +
" \"must_not\": [\n" +
" { \"match\": { \"name\": \"张1\" } },\n" +
" { \"match\": { \"age\": \"21\" } }\n" +
" ]\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 布尔值(bool)查询(返回 name=张1 & age!=21)
*/
@Test
public void findByMachAndNotBool() throws Exception{
String DSL = "{\n" +
" \"query\": {\n" +
" \"bool\": {\n" +
" \"must\": [\n" +
" { \"match\": { \"name\": \"张1\" } }\n" +
" ],\n" +
" \"must_not\": [\n" +
" { \"match\": { \"age\": \"21\" } }\n" +
" ]\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 范围查询(age在25到28岁之间)
*/
@Test
public void findByRang() throws Exception{
String DSL = "{\n" +
" \"query\": {\n" +
" \"range\" : {\n" +
" \"age\" : {\n" +
" \"gte\" : 25,\n" +
" \"lte\" : 28,\n" +
" \"boost\" : 2.0\n" +
" }\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"GET",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 分组查询(按年龄分组查询，降序统计top 10)
*类似 SELECT age, COUNT(*) FROM user GROUP BY age ORDER BY COUNT(*) DESC
*/
@Test
public void findByGroup() throws Exception{
String DSL = "{\n" +
" \"size\": 0,\n" +
" \"aggs\": {\n" +
" \"group_by_age\": {\n" +
" \"terms\": {\n" +
" \"field\": \"age\"\n" +
" }\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 分组查询(按年龄分组查询，查询组里其他字段的平均值)
*类似 SELECT age, avg(age) FROM user GROUP BY age ORDER BY COUNT(*) DESC
*/
@Test
public void findByGroupAndAvag() throws Exception{
String DSL = "{\n" +
" \"size\": 0,\n" +
" \"aggs\": {\n" +
" \"group_by_age\": {\n" +
" \"terms\": {\n" +
" \"field\": \"age\"\n" +
" },\n" +
" \"aggs\": {\n" +
" \"average_age\": {\n" +
" \"avg\": {\n" +
" \"field\": \"age\"\n" +
" }\n" +
" }\n" +
" }\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 分组查询(按年龄分组查询，并且降序排序)
*类似 SELECT age, avg(age) FROM user GROUP BY age ORDER BY avg(age) DESC
*/
@Test
public void findByGroupAndOrderBy() throws Exception{
String DSL = "{\n" +
" \"size\": 0,\n" +
" \"aggs\": {\n" +
" \"group_by_age\": {\n" +
" \"terms\": {\n" +
" \"field\": \"age\",\n" +
" \"order\": {\n" +
" \"average_age\": \"desc\"\n" +
" }\n" +
" },\n" +
" \"aggs\": {\n" +
" \"average_age\": {\n" +
" \"avg\": {\n" +
" \"field\": \"age\"\n" +
" }\n" +
" }\n" +
" }\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_search",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 删除操作
*/
@Test
public void testDelete() throws Exception{
Response response = restClient.performRequest(
"DELETE",
"userindex/user/100",
Collections.<String, String>emptyMap());
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 根据条件删除（使用_delete_by_query,POST请求）
*/
@Test
public void testDeleteByQuery()throws Exception{
String DSL ="{\n" +
" \"query\": {\n" +
" \"match\" : {\n" +
" \"name\" : \"张1\"\n" +
" }\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/_delete_by_query",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 跟新操作(1. 从旧文档中检索JSON
2. 修改它
3. 删除旧文档
4. 索引新文档)
*/
@Test
public void testUpdate() throws Exception{
User user = new User();
user.setId(100L);
user.setAge(20);
user.setName("张三修改");
user.setSex(1);
HttpEntity entity = new NStringEntity(gson.toJson(user), ContentType.APPLICATION_JSON);
Response indexResponse = restClient.performRequest(
"PUT",
"userindex/user/100",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(indexResponse.getEntity()));
}
/**
* 局部跟新字段(动态添加字段，添加tags和views字段)
*/
@Test
public void testUpdateField() throws Exception{
String DSL ="{\n" +
" \"doc\" : {\n" +
" \"tags\" : [ \"testing\" ],\n" +
" \"views\": 0\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/100/_update",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 使用脚本部分跟新字段(将views字段数量加1)
*/
@Test
public void testUpdateFieldByScript() throws Exception{
String DSL ="{\n" +
" \"script\" : \"ctx._source.views+=1\"\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/100/_update",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
/**
* 将search 标签追加到 tags 数组中
*/
@Test
public void testUpdateFieldAddByScript() throws Exception{
String DSL = "{\n" +
" \"script\" : \"ctx._source.tags+=new_tag\",\n" +
" \"params\" : {\n" +
" \"new_tag\" : \"search\"\n" +
" }\n" +
"}";
HttpEntity entity = new NStringEntity(DSL, ContentType.APPLICATION_JSON);
Response response = restClient.performRequest(
"POST",
"userindex/user/100/_update",
Collections.<String, String>emptyMap(),
entity);
System.out.println(EntityUtils.toString(response.getEntity()));
}
@After
public void closeRestClient() throws Exception{
restClient.close();
}
}
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