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一:运行环境
JDK:1.8
ES:5.6.4
二:学习内容
如何构建spring-data-elasticsearch环境?
如何实现常用的增删改查?
如何实现对象嵌套也就是1对多这种关系?
三:JAVA依赖环境
根据spring-data-elasticsearch官网说明,我这采用的是3.0.6.RELEASE版本,spring boot采用的是2.0.1.RELEASE;
4.0.0 org.springframework.boot spring-boot-starter-parent 2.0.1.RELEASE com.huize.pluto.els demo 1.0.0-SNAPSHOT jar demo http://maven.apache.org UTF-8 5.6.4 1.8 spring-libs-milestone https://repo.spring.io/libs-milestone spring-plugins-release https://repo.spring.io/plugins-release org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test org.springframework.data spring-data-elasticsearch 3.0.6.RELEASE org.elasticsearch elasticsearch ${elasticsearch.version} org.elasticsearch.client transport ${elasticsearch.version} commons-logging commons-logging org.apache.maven.plugins maven-compiler-plugin 3.5.1 1.8 1.8 UTF-8
四、spring-data-elasticsearch详解
4.1:配置ES
声明 ElasticsearchTemplate bean ;(当然也可以采用spring boot自动配置方法来实现,因为后面还得直接用JAVA API操作ES,所以这用代码配置了)
/*** ** 配置ES,支持集群 */@Configurationpublic class ElasticConfigration { @Value("${elasticsearch.host}") private String esHost; @Value("${elasticsearch.port}") private int esPort; @Value("${elasticsearch.clusterName}") private String esClusterName; private TransportClient client; @PostConstruct public void initialize() throws Exception { Settings esSettings = Settings.builder() .put("cluster.name", esClusterName) .put("client.transport.sniff", true).build(); client = new PreBuiltTransportClient(esSettings); String[] esHosts = esHost.trim().split(","); for (String host : esHosts) { client.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(host), esPort)); } } @Bean public Client client() { return client; } @Bean public ElasticsearchTemplate elasticsearchTemplate() throws Exception { return new ElasticsearchTemplate(client); } @PreDestroy public void destroy() { if (client != null) { client.close(); } } }
4.2:编写实体类
声明各个字段类型及相应属性:
/** * 声明 USER实体,注意有一个1对多关系的roles **/@Document(indexName = "test-user", type = "user",replicas=0,shards=3)public class User { @Id private String id; @Field(type=FieldType.keyword) private String userName; @Field(type=FieldType.Integer) private Integer age; @Field(type=FieldType.Date) private Date birthday; /** * 声明分词器为ik_smart (注意 es要安装ik分词器插件) */ @Field(searchAnalyzer="ik_smart",analyzer="ik_smart",type=FieldType.text) private String description; /** * 1对多在spring-data-elasticsearch 统一为nested类型 **/ @Field(type=FieldType.Nested,includeInParent=true) private Listroles; public User() {} public User(String userName,Integer age,Date birthday,String description) { this.userName = userName; this.age = age; this.birthday = birthday; this.description = description; } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public Date getBirthday() { return birthday; } public void setBirthday(Date birthday) { this.birthday = birthday; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } public List getRoles() { return roles; } public void setRoles(List roles) { this.roles = roles; } }@Document(indexName = "test-role", type = "role",replicas=0,shards=3)public class Role { @Id private String id; @Field(type=FieldType.keyword) private String name; @Field(type=FieldType.Date) private Date createTime; @Field(searchAnalyzer="ik_smart",analyzer="ik_smart",type=FieldType.text) private String description; public Role() {} public Role(String name,String description,Date createTime) { this.name = name; this.description = description; this.createTime = createTime; } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Date getCreateTime() { return createTime; } public void setCreateTime(Date createTime) { this.createTime = createTime; } public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } }
4.3:编写dao
只要继承ElasticsearchRepository就具有常用的增删减查功能了,可以新增一些其他需要用到的查询
public interface UserRepository extends ElasticsearchRepository{ //按userName like查询 List findByUserNameLike(String userName); //按role的name属性查询 List findByRolesName(String name); //按role的name属性查询 两种方式都可以 List findByRoles_Name(String name); }
4.4:编写service
@Servicepublic class UserStandardService implements StandardService{ @Autowired private UserRepository userRepository; @Autowired private ElasticsearchTemplate elasticsearchTemplate; /** * 批量新增 **/ @Override public void batchAddUser(Listusers) { if(CollectionUtils.isEmpty(users)) { return ; } List queries = Lists.newArrayListWithExpectedSize(users.size()); IndexQuery indexItem = null; for(User user :users) { indexItem = new IndexQuery(); indexItem.setObject(user); queries.add(indexItem); } elasticsearchTemplate.bulkIndex(queries); } @Override public void addUser(User user) { userRepository.save(user); } @Override public void deletedUserById(String id) { userRepository.deleteById(id); } /** * 根据userId更新信息 */ @Override public void updateUser(User user) { UpdateQuery updateQuery = new UpdateQuery(); updateQuery.setId(user.getId()); updateQuery.setClazz(User.class); user.setId(null); UpdateRequest request = new UpdateRequest(); request.doc(JsonUtils.beanToJson(user)); updateQuery.setUpdateRequest(request); elasticsearchTemplate.update(updateQuery); } @Override public List queryByUserName(String userName) { return userRepository.findByUserNameLike(userName); } @Override public List queryByRoleName(Role role) { return userRepository.findByRoles_Name(role.getName()); } }
4.5:启动
主要要加上 @EnableElasticsearchRepositories 注解;
@EnableElasticsearchRepositories(basePackages = "com.test.els.demo.core.user.repository")@SpringBootApplicationpublic class DemoApplication { private static final Logger logger = LoggerFactory.getLogger(DemoApplication.class); public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); logger.info("start completed !"); } }
OK,到这spring-data-elasticsearch 实践完了。
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