Elaticsearch第二篇 添刪查改

package com.tx;


import com.tx.model.Student;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.data.elasticsearch.core.SearchResultMapper;
import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
import org.springframework.data.elasticsearch.core.aggregation.impl.AggregatedPageImpl;
import org.springframework.data.elasticsearch.core.query.*;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = ElaticSearchApplicaton.class)
public class ESTest{
// 參考文章   https://www.cnblogs.com/linlf03/p/12828414.html


@Autowired
private ElasticsearchTemplate elasticsearchTemplate;

    /**
     * 創建索引
     */

        @Test
public void createIndexStu(){
            Student stu =new Student();
            stu.setStuid(1091L);
            stu.setName("d的心");
            stu.setAge(30);

            IndexQuery query = new IndexQueryBuilder().withObject(stu).build();

            elasticsearchTemplate.index(query);


        }

    /**
     * 更新索引
     */

    @Test
    public void updateIndexStu(){
        Map<String,Object> source =new HashMap<>();
//        source.put("age","100");
//        source.put("name","廳阿斯蒂芬");
        source.put("sign","I am not a english teacher");
        source.put("money",88.8f);
        source.put("age","100");

        IndexRequest indexRequest = new IndexRequest();
        indexRequest.source(source);


        UpdateQuery query = new UpdateQueryBuilder().withClass(Student.class).withId("1001").withIndexRequest(indexRequest).build();

        elasticsearchTemplate.update(query);


    }

    /**
     * 刪除索引
     */
//    注意： 不建議使用ElasticsearchTemplate對索引進行管理（創建索引，更新映射，刪除索引）。
//
//    索引就像是數據庫或者數據庫中的表，我們平時不會通過Java代碼頻繁的去創建修改刪除數據庫或者表，之後針對數據做CRUD操作，在es中也是同理，
    @Test
    public void deleteIndexStu(){
        elasticsearchTemplate.delete(Student.class,"1001");
    }

    /**
     * 查詢索引
     *
     */
    @Test
    public void getStuInfo(){
        GetQuery getQuery = new GetQuery();
        getQuery.setId("1001");
        Student student = elasticsearchTemplate.queryForObject(getQuery, Student.class);
        System.out.println(student);
    }

    @Test
    public void createIndex2(){
        for(int i = 0 ; i < 15; i++){
            Student stu = new Student();
            stu.setStuid(1000L + i);
            stu.setName("Nick" + i);
            stu.setAge(20 + i);
            stu.setMoney(18.9f + i);
            stu.setSign("I am a teacher");
            stu.setDescription("I am a english teacher " + i);

            IndexQuery indexQuery = new IndexQueryBuilder().withObject(stu).build();
            elasticsearchTemplate.index(indexQuery);
        }

    }

    @Test
    public void searchStuDoc() {
        Pageable pageable = PageRequest.of(0, 15);
        SearchQuery query = new NativeSearchQueryBuilder()
                .withQuery(QueryBuilders.matchQuery("sign","a teacher"))
                .withPageable(pageable).build();
        AggregatedPage<Student> pageStu = elasticsearchTemplate.queryForPage(query, Student.class);

        System.out.println("總分頁數:" + pageStu.getTotalPages());
        List<Student> stuList = pageStu.getContent();
        for (Student student : stuList) {
            System.out.println(student);
        }
    }

//    @Test
//    public void highlightStuDoc(){
//        String preTag = "<font color='red'>";
//        String postTag = "</font>";
//        Pageable pageable = PageRequest.of(0,2);
//        SearchQuery query = new NativeSearchQueryBuilder()
//                .withQuery(QueryBuilders.matchQuery("sign","a teacher"))
//                .withHighlightFields(new HighlightBuilder.Field("sign").preTags(preTag).postTags(postTag))
//                .withPageable(pageable).build();
//        AggregatedPage<Student> pageStu = elasticsearchTemplate.queryForPage(query, Student.class, new SearchResultMapper() {
//            @Override
//            public <T> AggregatedPage<T> mapResults(SearchResponse searchResponse, Class<T> aClass, Pageable pageable) {
//                List<Student> stuHighlight = new ArrayList<>();
//                SearchHits hits =  searchResponse.getHits();
//                for(SearchHit h: hits){
//                    HighlightField highlightField = h.getHighlightFields().get("description");
//                    Integer stuId = (Integer)h.getSourceAsMap().get("stuId");
//                    String name = (String)h.getSourceAsMap().get("name");
//                    Integer age = (Integer)h.getSourceAsMap().get("age");
//                    String sign = (String)h.getSourceAsMap().get("sign");
//                    Object money = h.getSourceAsMap().get("money");
//                    //高亮數據
//                    String description = highlightField.getFragments()[0].toString();
//                    Student studentHL = new Student();
//                    studentHL.setDescription(description);
//                    studentHL.setStuid(Long.parseLong(stuId.toString()));
//                    studentHL.setName(name);
//                    studentHL.setAge(age);
//                    studentHL.setSign(sign);
//                    studentHL.setMoney(Float.parseFloat(money.toString()));
//                    stuHighlight.add(studentHL);
//                }
//                if(!stuHighlight.isEmpty()){
//                    return  new AggregatedPageImpl<>((List<T>) stuHighlight);
//                }
//                return null;
//            }
//
//
//            public <T> T mapSearchHit(SearchHit searchHit, Class<T> aClass) {
//                return null;
//            }
//        });
//
//        System.out.println("總分頁數:" +   pageStu.getTotalPages());
//        List<Student> stuList = pageStu.getContent();
//        for(Student student : stuList){
//            System.out.println(student);
//        }
//
//    }


    }

import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.Document;
import org.springframework.data.elasticsearch.annotations.Field;

@Document(indexName = "student_index",type = "_doc")
public class Student {

    @Id
    private Long stuid;

    @Field(store = true)
    private String name;

    @Field(store = true)
    private Integer age;

    @Field(store = true)
    private float money;

    @Field(store = true)
    private String sign;

    @Field(store = true)
    private String Description;

    public float getMoney() {
        return money;
    }

    public void setMoney(float money) {
        this.money = money;
    }

    public String getSign() {
        return sign;
    }

    public void setSign(String sign) {
        this.sign = sign;
    }

    public String getDescription() {
        return Description;
    }

    public void setDescription(String description) {
        Description = description;
    }

    public Long getStuid() {
        return stuid;
    }

    public void setStuid(Long stuid) {
        this.stuid = stuid;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Student{" +
                "stuid=" + stuid +
                ", name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}

 

 

問題：springframework.data.elasticsearch.ElasticsearchException: failed to map source

添加一個無參構造方法解決

public Item() { }