# SpringBoot整合Elasticsearch

SpringBoot整合Elasticsearch

---

1.SpringBoot项目引入最新的依赖：最简单的方法，其他依赖引入方式会导致jar包冲突

<!--引入ES依赖-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>

2.配置ElasticSearch的信息Appllvation.yml如下：可以不配置

#ElasticSearch配置
#配置Es的节点
es:
  host: 127.0.0.1
  port: 9200

3.目前Es中有索引index1，该索引包含的字段有name,age

{"took":3,"timed_out":false,"_shards":{"total":1,"successful":1,"skipped":0,"failed":0},"hits":{"total":{"value":1,"relation":"eq"},"max_score":1.0,"hits":[{"_index":"index1","_type":"user1","_id":"1","_score":1.0,"_source":{
	"name":"test",
    "age":23

}}]}}

---

4.在项目中创建实体类，并且通过注解来声明字段的映射属性。

@Data
@NoArgsConstructor
@Accessors(chain = true)
@Document(indexName = "index1",type = "user1", shards = 5, replicas = 1)
public class DocBean {
    @Id
    private int id;
    @Field(type = FieldType.Keyword)
    private String firstCode;
    @Field(type = FieldType.Keyword)
    private String name;
    @Field(type = FieldType.Keyword)
    private int age;
    @Field(type = FieldType.Keyword)
    private String secordCode;
    @Field(type = FieldType.Text, analyzer = "ik_max_word")
    private String content;
    public DocBean(int id, String firstCode, String name, int age, String secordCode, String content) {
        this.id = id;
        this.firstCode = firstCode;
        this.name = name;
        this.age = age;
        this.secordCode = secordCode;
        this.content = content;
    }
}

5.ElasticService如下：

	void createIndex();
    void deleteIndex(String index);
    void save(DocBean docBean);
    void saveAll(List<DocBean> list);
    Iterator<DocBean> findAll();
    Page<DocBean> findByContent(String content);
    Page<DocBean> findByFirstCode(String firstCode);
    Page<DocBean> findBySecordCode(String secordCode);
    Page<DocBean> query(String key);

6.实现类如下

@Service("elasticService")
public class ElasticServiceImpl implements ElasticService{
    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;
    @Autowired
    private ElasticRepository elasticRepository;
    private Pageable pageable = PageRequest.of(0,10);
    @Override
    public void createIndex() {
    }
    @Override
    public void deleteIndex(String index) {
    }
    @Override
    public void save(DocBean docBean) {
        elasticRepository.save(docBean);
    }
    @Override
    public void saveAll(List<DocBean> list) {
        elasticRepository.saveAll(list);
    }
    @Override
    public Iterator<DocBean> findAll() {
        return elasticRepository.findAll().iterator();
    }
    @Override
    public Page<DocBean> findByContent(String content) {
        return elasticRepository.findByContent(content,pageable);
    }
    @Override
    public Page<DocBean> findByFirstCode(String firstCode) {
        return elasticRepository.findByFirstCode(firstCode,pageable);
    }

    @Override
    public Page<DocBean> findBySecordCode(String secordCode) {
        return elasticRepository.findBySecordCode(secordCode,pageable);
    }
    @Override
    public Page<DocBean> query(String key) {
        return elasticRepository.findByContent(key,pageable);
    }
}

7.Es测试Controller如下：

@Controller
@RequestMapping("/elastic")
@ResponseBody
public class ElasticController {
    @Autowired
    private ElasticService elasticService;
    
    @RequestMapping("/add")
    public String addindex(){
        DocBean docBean = new DocBean(1, "张三", "张三", 20, "李四", "都是好人");
        elasticService.save(docBean);
        return "保存成功！";
    }
    
    @RequestMapping("/all")
    @ResponseBody
    public Iterator<DocBean> GetAll(){
        Iterator<DocBean> all = elasticService.findAll();
        return all;
    }

    @RequestMapping("/createindex")
    public String createIndex(){
        try{
            elasticService.createIndex();
            List<DocBean> list= new ArrayList<>();
            list.add(new DocBean(1, "张三", "张三", 20, "李四", "都是好人"));
            list.add(new DocBean(2, "张三", "张三", 20, "李四", "都是好人"));
            elasticService.saveAll(list);
            return "创建成功!";
        }catch (Exception e){
            e.printStackTrace();
            return e.getMessage();
        }
    }
}