pom引入
org.elasticsearch
elasticsearch
5.6.8
org.elasticsearch.client
transport
5.6.8
org.apache.logging.log4j
log4j-to-slf4j
2.9.1
org.slf4j
slf4j-api
1.7.24
org.slf4j
slf4j-simple
1.7.21
log4j
log4j
1.2.12
junit
junit
4.12
com.fasterxml.jackson.core
jackson-core
2.8.1
com.fasterxml.jackson.core
jackson-databind
2.8.1
com.fasterxml.jackson.core
jackson-annotations
2.8.1
org.springframework.data
spring-data-elasticsearch
3.0.5.RELEASE
org.elasticsearch.plugin
transport-netty4-client
org.springframework
spring-test
5.0.4.RELEASE
applicationContext.xml配置
实体类配置
@Document(indexName ="spring_data_index " ,type = "article")
public class Article {
// store：是否存储 index：是否设置分词,默认为true
// analyzer：存储时使用分词器
// searchAnalyzer：查询时使用分词器将查询的字段进行分词
@Id
@Field(store = true,type = FieldType.Long)
private long id;
@Field(store = true,type = FieldType.text,analyzer = "ik_smart",searchAnalyzer = "ik_smart")
private String title;
@Field(store = true,type = FieldType.text,analyzer = "ik_smart",searchAnalyzer = "ik_smart")
private String context;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getContext() {
return context;
}
public void setContext(String context) {
this.context = context;
}
@Override
public String toString() {
return "Article{" +
"id=" + id +
", title='" + title + '\'' +
", context='" + context + '\'' +
'}';
}}
配置接口
//接口中应该指定实体类以及ID的类型
public interface ArticleRespository extends ElasticsearchRepository {
//要注意命名规则
//自定义查询
List findByTitle(String str);
//根据多条件自定义查询
List findByTitleOrContext(String title,String content);
List findByTitleOrContext(String title, String content, Pageable pageable);
} 常用步骤
//创建索引
@Autowired
private ArticleRespository articleRespository;
@Autowired
private ElasticsearchTemplate template;
@Test
public void createIndex() throws Exception{
//创建索引，并配置映射关系
template.createIndex(Article.class);
}
//添加Document
@Test
public void addDocument() throws Exception{
//创建一个对象
Article article=new Article();
article.setId(2);
article.setTitle("maven项目对象模型,第二个");
article.setContext("maven是一个开源项目管理工具,第二个");
articleRespository.save(article);
}
//添加多个Document
@Test
public void addDocumentMore() throws Exception{
for(int i =3 ;i<10;i++){
//创建一个对象
Article article=new Article();
article.setId(i);
article.setTitle("maven项目对象模型,第"+i+"个");
article.setContext("maven是一个开源项目管理工具,第"+i+"个");
articleRespository.save(article);
}
}
//删除Document
@Test
public void deleteDocument() throws Exception{
articleRespository.deleteById(1l);
//全部删除
//articleRespository.deleteAll();
}
//修改
@Test
public void updateDocument() throws Exception{
//其实就是添加文档,因为es是基于lucene的,所以修改的原理是先删除再添加
//所以更新文档其实就是添加文档,保持文档与源文档id一致,这样就能覆盖原有文档起到更新的作用
//addDocument();
}
//查询 遍历
@Test
public void searchDocument() throws Exception{
//!!!这不是迭代器
Iterable articles = articleRespository.findAll();
articles.forEach(article -> System.out.println(article));
}
//查询 byId
@Test
public void searchById() throws Exception {
Optional optional = articleRespository.findById(3l);
Article article = optional.get();
boolean b = StringUtils.isEmpty(article);
if (!b) {
System.out.println(article);
} else {
System.out.println("无法查询到该对象");
}
}
//自定义查询
@Test
public void searchByTitle(){
List list = articleRespository.findByTitle("maven");
list.stream().forEach(article -> System.out.println(article));
}
//自定义查询 返回list
@Test
public void searchByTitleOrContent(){
//查询时是分词查询，每个词之间是and关系，所以查询的所有词都应该包含在被查到的对象字段中
List list = articleRespository.findByTitleOrContext("对象maven", "第3个");
list.stream().forEach(article -> System.out.println(article));
}
//自定义查询并设置分页
@Test
public void searchByTitleOrContentByPage(){
//设置分页信息，默认从第0页开始
Pageable pageable= PageRequest.of(0,3);
List list = articleRespository.findByTitleOrContext("第二个", "第5个",pageable);
list.stream().forEach(article -> System.out.println(article));
}
//使用原生的查询，查询内容不需要完全匹配
//类似于QueryString
@Test
public void NativeSearchQuery() throws Exception{
//创建一个查询对象
NativeSearchQuery query=new NativeSearchQueryBuilder()
.withQuery(QueryBuilders.queryStringQuery("maven是一个工程构建起").defaultField("title"))
.withPageable(PageRequest.of(0,5))
.withHighlightFields(new HighlightBuilder.Field("title").preTags("").postTags(""))
.build();
List articles = template.queryForList(query, Article.class);
articles.stream().forEach(article -> System.out.println(article));
}
}