一.导入maven依赖
本机安装的是6.5.4版本的Elastic Search，故这里导入6.5.4版本的Elastic Search依赖
<properties>
<java.version>1.8</java.version>
<elasticsearch.version>6.5.4</elasticsearch.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>transport</artifactId>
<version>${elasticsearch.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.7</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>二.创建配置类
1.Elastic Search的配置
-
需要在/conf/elasticsearch.yml配置node和cluster.name以及允许跨域访问
conf/elasticsearch.yml
cluster.name: dayukeji
node.name: dayutec
http.cors.enabled: true
http.cors.allow-origin: "*"2.创建配置类
9200作为Http协议，主要用于外部通讯
9300作为Tcp协议，jar之间就是通过Tcp协议通讯
ES集群之间是通过9300进行通讯
@Configuration
public class MyConfig {
@Bean
public TransportClient client() throws UnknownHostException {
//配置setting
Settings settings = Settings.builder()
.put("node.name", "dayutec")
.put("cluster.name", "dayukeji")
.build();
TransportClient client = new PreBuiltTransportClient(settings)
.addTransportAddress(new TransportAddress(InetAddress.getByName("localhost"), 9300));
return client;
}
}三.测试方法
先调用127.0.0.1:9200/book创建一个index
{
"settings":{
"number_of_shards":3,
"number_of_replicas":1
},
"mappings":{
"novel":{
"properties":{
"name":{
"type":"text"
},
"price":{
"type":"integer"
},
"word_count":{
"type":"integer"
}
}
}
}
}
1.新增
@PostMapping("/book/novel")
public ResponseEntity add(@RequestParam("name") String name,
@RequestParam("price") Integer price,
@RequestParam(value = "word_count") int wordCount) {
try {
XContentBuilder xContentBuilder = XContentFactory.jsonBuilder()
.startObject()
.field("name", name)
.field("price", price)
.field("word_count", wordCount)
.endObject();
IndexResponse result = this.client.prepareIndex("book", "novel")
.setSource(xContentBuilder)
.get();
return new ResponseEntity(result.getId(), HttpStatus.OK);
} catch (IOException e) {
e.printStackTrace();
return new ResponseEntity(HttpStatus.INTERNAL_SERVER_ERROR);
}
}2.获取
/**
* 获取
*
* @param id
* @return
*/
@GetMapping("/book/novel/{id}")
public ResponseEntity get(@PathVariable("id") String id) {
GetResponse result = this.client.prepareGet("book", "novel", id).get();
if (result.isExists()) {
return new ResponseEntity(result.getSource(), HttpStatus.OK);
} else {
return new ResponseEntity(HttpStatus.NOT_FOUND);
}
}3.修改
@PutMapping("/book/novel/{id}")
public ResponseEntity update(@PathVariable("id") String id,
@RequestParam(value = "name", required = false) String name,
@RequestParam(value = "price", required = false) Integer price) {
UpdateRequest update = new UpdateRequest("book", "novel", id);
try {
XContentBuilder xContentBuilder = XContentFactory.jsonBuilder()
.startObject();
if (name != null) {
xContentBuilder.field("name", name);
}
if (price != null) {
xContentBuilder.field("price", price);
}
xContentBuilder.endObject();
update.doc(xContentBuilder);
} catch (IOException e) {
return new ResponseEntity(HttpStatus.INTERNAL_SERVER_ERROR);
}
try {
UpdateResponse result = this.client.update(update).get();
return new ResponseEntity(result.getResult().toString(), HttpStatus.OK);
} catch (InterruptedException e) {
return new ResponseEntity(HttpStatus.INTERNAL_SERVER_ERROR);
} catch (ExecutionException e) {
return new ResponseEntity(HttpStatus.INTERNAL_SERVER_ERROR);
}
}4.删除
@DeleteMapping("/book/novel/{id}")
public ResponseEntity delete(@PathVariable("id") String id) {
DeleteResponse result = this.client.prepareDelete("book", "novel", id).get();
return new ResponseEntity(result.getResult().toString(), HttpStatus.OK);
}5.复杂查询
@GetMapping("/book/novel")
public ResponseEntity query(
@RequestParam(value = "name", required = false) String name,
@RequestParam(value = "price", required = false) Integer price,
@RequestParam(value = "gt_word_count", defaultValue = "0") Integer gtWordCount,
@RequestParam(value = "lt_word_count", required = false) Integer ltWordCount) {
BoolQueryBuilder boolQuery = QueryBuilders.boolQuery();
if (name != null) {
boolQuery.must(QueryBuilders.matchQuery("name", name));
}
if (price != null) {
boolQuery.must(QueryBuilders.matchQuery("price", price));
}
RangeQueryBuilder rangeQuery = QueryBuilders.rangeQuery("word_count").from(gtWordCount);
if (ltWordCount != null && ltWordCount > 0) {
rangeQuery.to(ltWordCount);
}
SearchResponse result = this.client.prepareSearch("book")
.setTypes("novel")
.setSearchType(SearchType.DFS_QUERY_THEN_FETCH)
.setQuery(boolQuery)
.setFrom(0)
.setSize(10)
.get();
List<Map<String, Object>> list = new ArrayList<>();
for (SearchHit hit : result.getHits()) {
list.add(hit.getSourceAsMap());
}
return new ResponseEntity(list, HttpStatus.OK);
}