前几天学习了我ElasticSearch和SpringBoot整合的相关应用，这个项目我也是参考慕课网上视频学习的，大家如果有兴趣的话，也可以去看一下。链接我放这了。
Springboot + ElasticSearch 构建博客检索系统

实现的效果就是如下所示：

MySQL查询出来的结果

ElasticSearch查询出来的结果
image.png

1、开始准备

• 开发工具的的话，我这里使用的IDEA、MySql、ElasticSearch。
• 框架：
  1. SpringBoot
  2. MyBatisPlus
• 这里是使用Spring Boot搭建JSP页面，大家如果不会的话，可以去参考SpringBoot新建JSP页面

2、系统结构

系统结构.png

• 下面我将按照从上到下依次介绍里面的代码。

2.1config

@Configuration
@MapperScan("com.ols.test.online_learning_system.mapper.*")
public class MybatisPlusConfig {
    /**
     * 打印 sql
     */
    @Bean
    public PerformanceInterceptor performanceInterceptor() {
        PerformanceInterceptor performanceInterceptor = new PerformanceInterceptor();
        //格式化sql语句
        Properties properties = new Properties();
        properties.setProperty("format", "true");
        performanceInterceptor.setProperties(properties);
        return performanceInterceptor;
    }
}

2.2 Controller

@RequestMapping("MySqlAndEsApi")
@Controller
public class MySqlAndEsController {

 @Autowired
 private CourseService courseService;
 @Autowired
 private EsCourseRepository esCourseRepository;

 @GetMapping("/search")
 @ResponseBody
 public Map<String, Object> getCourseKeyWord(@RequestParam("keyword") String keyword, @RequestParam("type") String type) {
   Map<String, Object> map = new HashMap<String, Object>();
   StopWatch watch = new StopWatch();
   watch.start();
   if (type.equalsIgnoreCase("mysql")) {
     //mysql
     List<Course> list = courseService.getCourseList(keyword);
     map.put("courseList", list);
   } else if (type.equalsIgnoreCase("es")) {
     //es
     BoolQueryBuilder builder = QueryBuilders.boolQuery();
     builder.should(QueryBuilders.matchPhraseQuery("courseName", keyword));
     builder.should(QueryBuilders.matchPhraseQuery("courseIntroduce", keyword));
     String s = builder.toString();
     System.out.println(s);
     Iterable<EsCourse> iterable = esCourseRepository.search(builder);
     List<EsCourse> list = new ArrayList<>();
     Iterator it = iterable.iterator();
     while (it.hasNext()) {
       list.add((EsCourse) it.next());
     }
     System.out.println(list);
     map.put("courseList", list);
   } else {
     map.put("msg", "i don`t understand");
     return map;
   }
   watch.stop();
   long totalTimeMills = watch.getTotalTimeMillis();
   map.put("duration", totalTimeMills);
   return map;
 }

 @GetMapping("/toMysqlEs")
 public String toMysqlEs(Model model) {
   List<Course> list = courseService.getCourseList();
   model.addAttribute("courseList", list);
   return "mysql_es";
 }
}

2.3 es

2.3.1 entity

@Data
@Document(indexName = "coursename",type = "course")
public class EsCourse {

    @Id
    private Integer courseId;

    @Field(type = FieldType.Text)
    private String courseName;

    @Field(type = FieldType.Text)
    private String coursePicture;

    @Field(type = FieldType.Text)
    private String courseVideo;

    @Field(type = FieldType.Text)
    private String coursePingfen;

    @Field(type = FieldType.Long)
    private Integer teacherId;

    @Field(type = FieldType.Text)
    private String courseIntroduce;
}

2.3.2 repository

public interface EsCourseRepository extends ElasticsearchRepository<EsCourse, Integer> {
}

2.4 mapper

@Mapper
public interface CourseMapper extends BaseMapper<Course> {
    @Select("select * from course c where c.course_name like CONCAT('%',#{param},'%') or c.course_introduce like CONCAT('%',#{param},'%')")
    List<Course> getCourseList(@Param("param") String param);
}

2.5 model

@Data
public class Course {
    @TableId(value = "course_id",type = IdType.AUTO)
    private Integer courseId;

    private String courseName;

    private String coursePicture;

    private String courseVideo;

    private String coursePingfen;

    private Integer teacherId;

    private String courseIntroduce;
}

2.6 service

public interface CourseService {
 List<Course> getCourseList();
  List<Course> getCourseList(@Param("param") String param);
}

2.7 serviceImpl

@Service
public class CourseServiceImpl implements CourseService {

  @Autowired
  private CourseMapper courseMapper;
  @Override
  public List<Course> getCourseList() {
    EntityWrapper entityWrapper = new EntityWrapper();
    return courseMapper.selectList(entityWrapper);
  }

  @Override
  public List<Course> getCourseList(String param) {
    return courseMapper.getCourseList(param);
  }
}

2.8 OnlineLearningSystemApplication

@SpringBootApplication
@MapperScan("com.ols.test.online_learning_system.mapper")
public class OnlineLearningSystemApplication {
  public static void main(String[] args) {
    SpringApplication.run(OnlineLearningSystemApplication.class, args);
  }
}

2.9 CoureMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.ols.test.online_learning_system.mapper.CourseMapper" >
  <resultMap id="BaseResultMap" type="com.ols.test.online_learning_system.model.Course" >
    <id column="course_id" property="courseId" jdbcType="INTEGER" />
    <result column="course_name" property="courseName" jdbcType="VARCHAR" />
    <result column="course_picture" property="coursePicture" jdbcType="VARCHAR" />
    <result column="course_video" property="courseVideo" jdbcType="VARCHAR" />
    <result column="course_pingfen" property="coursePingfen" jdbcType="VARCHAR" />
    <result column="teacher_id" property="teacherId" jdbcType="INTEGER" />
    <result column="course_introduce" property="courseIntroduce" jdbcType="VARCHAR" />
  </resultMap>
</mapper>

2.10 application.yml

spring:
  mvc:
    view:
      prefix: /WEB-INF/views/
      suffix: .jsp
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/es?useUnicode=true&characterEncoding=UTF-8
    username: root
    password: hello@
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
  data:
    elasticsearch:
      cluster-name: elasticsearch
      cluster-nodes: 127.0.0.1:9300
mybatis-plus:
  mapper-locations: classpath:/mapping/*Mapper.xml
  typeAliasesPackage: com.ols.test.online_learning_system.model
  configuration:
      map-underscore-to-camel-case: true
      cache-enabled: true
      lazyLoadingEnabled: true
      multipleResultSetsEnabled: true

2.11 pom.xml

关键依赖

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    <!--阿里巴巴连接池-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.9</version>
        </dependency>

        <!--mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
    <!--Mybatis-plus-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>2.3</version>
        </dependency>

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>2.3</version>
        </dependency>

        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.20</version>
            <scope>provided</scope>
        </dependency>

        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional> <!-- 这个需要为 true 热部署才有效 -->
        </dependency>
     <!--JSP配置-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>

        <!--tomcat的支持.-->
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>provided</scope>
        </dependency>
<!--        elasticsearch-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
        </dependency>

3.0 测试

首页

页面1.png

mysql测试

es测试

image.png

终于写完了，忙个半死....