scala 整合 springboot

发布时间：2023年12月21日

scala 整合 springboot

新建spingboot项目

idea 新建 springboot项目
idea 新建 springboot 项目

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.2.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>cn.lihaozhe</groupId>
    <artifactId>scala-boot</artifactId>
    <version>1.0</version>
    <name>scala-boot</name>
    <description>scala-boot</description>
    <properties>
        <jdk.version>21</jdk.version>
        <!-- 公共配置 -->
        <maven.compiler.source>21</maven.compiler.source>
        <maven.compiler.target>21</maven.compiler.target>
        <maven.compiler.compilerVersion>21</maven.compiler.compilerVersion>
        <maven.compiler.encoding>utf-8</maven.compiler.encoding>
        <project.build.sourceEncoding>utf-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <maven.test.failure.ignore>true</maven.test.failure.ignore>
        <maven.test.skip>true</maven.test.skip>

        <commons-dbutils.version>1.8.1</commons-dbutils.version>
        <commons-io.version>2.14.0</commons-io.version>
        <commons-lang3.version>3.13.0</commons-lang3.version>
        <druid.version>1.2.20</druid.version>
        <fastjson.version>2.0.41</fastjson.version>
        <gson.version>2.10.1</gson.version>
        <hutool.version>5.8.22</hutool.version>
        <jackson.version>2.15.3</jackson.version>
        <junit.version>5.10.0</junit.version>
        <lombok.version>1.18.30</lombok.version>
        <mysql.version>8.2.0</mysql.version>
        <scala.version>2.13.12</scala.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.20</version>
        </dependency>
        <dependency>
            <groupId>org.scala-tools.testing</groupId>
            <artifactId>specs_2.10</artifactId>
            <version>1.6.9</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.scalatest</groupId>
            <artifactId>scalatest_2.13</artifactId>
            <version>3.2.15</version>
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-api -->
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>${junit.version}</version>
            <!-- 作用域 -->
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-engine -->
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/cn.hutool/hutool-all -->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>${hutool.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>${commons-lang3.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>${commons-io.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>${gson.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>${fastjson.version}</version>
        </dependency>
        <!--jackson-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-jsr310</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <!--java 小工具-->
        <dependency>
            <groupId>com.github.binarywang</groupId>
            <artifactId>java-testdata-generator</artifactId>
            <version>1.1.2</version>
        </dependency>
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate.orm</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>6.3.1.Final</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
            <!-- 该插件用于将Scala代码编译成class文件 -->
            <plugin>
                <groupId>net.alchim31.maven</groupId>
                <artifactId>scala-maven-plugin</artifactId>
                <version>4.8.1</version>
                <configuration>
                    <scalaCompatVersion>${scala.version}</scalaCompatVersion>
                    <scalaVersion>${scala.version}</scalaVersion>
                </configuration>
                <executions>
                    <execution>
                        <id>scala-compile-first</id>
                        <phase>process-resources</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                    <execution>
                        <goals>
                            <goal>testCompile</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>compile-scala</id>
                        <phase>compile</phase>
                        <goals>
                            <goal>add-source</goal>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>test-compile-scala</id>
                        <phase>test-compile</phase>
                        <goals>
                            <goal>add-source</goal>
                            <goal>testCompile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>3.5.0</version>
                <configuration>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

创建数据库恢复数据

create database knowledge;
use knowledge;

idea恢复MySQL数据

编写 pojo 类

package cn.lihaozhe.pojo

import jakarta.persistence.{Column, Entity, GeneratedValue, GenerationType, Id, Table}

import scala.beans.BeanProperty

/**
 * @author 李昊哲
 * @version 1.0
 */
@Entity
@Table(name = "dujitang")
class Dujitang {
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  @Column(name = "id")
  @BeanProperty
  var id: Long = _
  @Column(name = "text")
  @BeanProperty
  var text: String = _

  override def toString: String = s"$id\t$text"
}

package cn.lihaozhe.pojo

import jakarta.persistence.{Column, Entity, GeneratedValue, GenerationType, Id, Table}

import scala.beans.BeanProperty

/**
 * @author 李昊哲
 * @version 1.0
 */
@Entity
@Table(name = "cy")
class Cy {
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  @Column(name = "id")
  @BeanProperty
  var id: Long = _
  @Column(name = "name")
  @BeanProperty
  var name: String = _
  @Column(name = "spell")
  @BeanProperty
  var spell: String = _
  @Column(name = "content")
  @BeanProperty
  var content: String = _
  @Column(name = "derivation")
  @BeanProperty
  var derivation: String = _
  @Column(name = "samples")
  @BeanProperty
  var samples: String = _
}

编写持久层

package cn.lihaozhe.repository

import cn.lihaozhe.pojo.Dujitang
import org.springframework.data.jpa.repository.{JpaRepository, JpaSpecificationExecutor}

/**
 * @author 李昊哲
 * @version 1.0
 */
trait DujitangRepository extends JpaRepository[Dujitang, Long] with JpaSpecificationExecutor[Dujitang] {

}

package cn.lihaozhe.repository

import cn.lihaozhe.pojo.Cy
import org.springframework.data.jpa.repository.{JpaRepository, JpaSpecificationExecutor}

/**
 * @author 李昊哲
 * @version 1.0
 */
trait CyRepository extends JpaRepository[Cy, Long] with JpaSpecificationExecutor[Cy] {

}

编写业务层

package cn.lihaozhe.service

import cn.lihaozhe.pojo.Dujitang

/**
 * @author 李昊哲
 * @version 1.0
 */
trait DujitangService {
  /**
   * 随机生成一条鸡汤
   *
   * @return 鸡汤文案
   */
  def random(): Dujitang
}

package cn.lihaozhe.service

import cn.lihaozhe.pojo.Cy
import org.springframework.data.domain.Page

/**
 * @author 李昊哲
 * @version 1.0
 */
trait CyService {
  /**
   * 分页查找 成语
   *
   * @param word     成语关键字
   * @param pageNum  查询页面号
   * @param pageSize 每页记录数
   * @return 成语列表
   */
  def page(word: String, pageNum: Int, pageSize: Int): Page[Cy]
}

package cn.lihaozhe.service.impl

import cn.lihaozhe.pojo.Dujitang
import cn.lihaozhe.repository.DujitangRepository
import cn.lihaozhe.service.DujitangService
import org.springframework.stereotype.Service

import scala.util.Random

/**
 * @author 李昊哲
 * @version 1.0
 */
@Service
class DujitangServiceImpl(dujitangRepository: DujitangRepository) extends DujitangService {

  /**
   * 随机生成一条鸡汤
   *
   * @return 鸡汤文案
   */
  override def random(): Dujitang = {
    val dujitangList = dujitangRepository.findAll()
    val index = new Random().nextInt(dujitangList.size())
    dujitangList.get(index)
  }
}

package cn.lihaozhe.service.impl

import cn.lihaozhe.pojo.Cy
import cn.lihaozhe.repository.CyRepository
import cn.lihaozhe.service.CyService
import jakarta.persistence.criteria.{CriteriaBuilder, CriteriaQuery, Predicate, Root}
import org.apache.commons.lang3.StringUtils
import org.springframework.data.domain.{Page, PageRequest, Sort}
import org.springframework.data.jpa.domain.Specification
import org.springframework.stereotype.Service

/**
 * @author 李昊哲
 * @version 1.0
 */
@Service
class CyServiceImpl(cyRepository: CyRepository) extends CyService {

  /**
   * 分页查找 成语
   *
   * @param word     成语关键字
   * @param pageNum  查询页面号
   * @param pageSize 每页记录数
   * @return 成语列表
   */
  override def page(word: String, pageNum: Int, pageSize: Int): Page[Cy] = {
    if (StringUtils.isBlank(word)) {
      cyRepository.findAll(PageRequest.of(pageNum - 1, pageSize, Sort.by(Sort.Direction.ASC, "id")))
    } else {
      val sb = new StringBuilder
      sb.append("%")
      sb.append(word)
      sb.append("%")
      cyRepository.findAll(new Specification[Cy] {
        override def toPredicate(root: Root[Cy], query: CriteriaQuery[_], cb: CriteriaBuilder): Predicate = cb.like(root.get("name").as(classOf[String]), sb.toString())
      }, PageRequest.of(pageNum - 1, pageSize, Sort.by(Sort.Direction.ASC, "id")))
    }
  }
}

编写数据接口

package cn.lihaozhe.controller

import cn.lihaozhe.pojo.Dujitang
import cn.lihaozhe.service.DujitangService
import org.springframework.web.bind.annotation.{GetMapping, RequestMapping, RestController}

/**
 * @author 李昊哲
 * @version 1.0
 */
@RestController
@RequestMapping(value = Array("/dujitang"))
class DujitangController(dujitangService: DujitangService) {
  @GetMapping(Array("/random"))
  def random(): Dujitang = dujitangService.random()
}

package cn.lihaozhe.controller

import cn.lihaozhe.service.CyService
import org.springframework.web.bind.annotation.{GetMapping, RequestMapping, RestController}

/**
 * @author 李昊哲
 * @version 1.0
 */
@RestController
@RequestMapping(Array("/cy"))
class CyController(cyService: CyService) {
  @GetMapping(Array("/page"))
  def page(word: String, pageNum: Int = 1, pageSize: Int = 5) = cyService.page(word, pageNum, pageSize)
}

application.yml

# 服务器配置
server:
  port: 6633
  servlet:
    context-path: /
    session:
      timeout: 30m
      cookie:
        max-age: 3600
    encoding:
      charset: UTF-8
      force: true
# spring配置
spring:
  application:
    name: scala-boot
  mvc:
    format:
      date: yyyy-MM-dd
      date-time: yyyy-MM-dd HH:mm:ss
    path match:
      matching-strategy: ant_path_matcher
  servlet:
    multipart:
      enabled: true
      max-file-size: 50MB
      max-request-size: 200MB
  jackson:
    serialization:
      FAIL_ON_EMPTY_BEANS: false
    # json 序列化排除值为 null 的属性
    default-property-inclusion: non_null
    # 配置 Date 类的时间格式，如果不涉及可以不加
    date-format: yyyy-MM-dd HH:mm:ss
    # 配置 Date 类的时区，如果不涉及可以不加
    time-zone: GMT+8
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql:///knowledge?useUnicode=true&characterEncoding=UTF8&useSSL=false&useServerPrepStmts=false&rewriteBatchedStatements=true&cachePrepStmts=true&allowMultiQueries=true&serverTimeZone=Aisa/Shanghai
    username: root
    password: lihaozhe
    type: com.alibaba.druid.pool.DruidDataSource
    druid:
      # 下面为连接池的补充设置，应用到上面所有数据源中
      # 初始化大小，最小，最大
      initial-size: 5
      min-idle: 5
      max-active: 200
      # 配置获取连接等待超时的时间
      max-wait: 60000
      # 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
      time-between-eviction-runs-millis: 60000
      # 配置一个连接在池中最小生存的时间，单位是毫秒
      min-evictable-idle-time-millis: 300000
      validation-query: SELECT 1 FROM DUAL
      test-while-idle: true
      test-on-borrow: false
      test-on-return: false
      # 打开PSCache，并且指定每个连接上PSCache的大小
      pool-prepared-statements: true
      # 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
      max-pool-prepared-statement-per-connection-size: 20
      filters: stat,wall,slf4j
      use-global-data-source-stat: true
      # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
      # connect-properties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
      stat-view-servlet:
        login-username: admin
        login-password: 123456
        reset-enable: false
        url-pattern: /druid/*
        allow: 0.0.0.0
        #deny:
        enabled: true
      web-stat-filter:
        url-pattern: /*
        exclusions: "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*"
  jpa:
    database: MySQL
    database-platform: org.hibernate.dialect.MySQL8Dialect
    show-sql: true
    open-in-view: true
    hibernate:
      ddl-auto: update
  #      自动创建数据建库表(hibernate.hbm2ddl.auto)：
  #      create：程序运行时创建数据库表（如果有表，先删除表再创建）
  #      update：程序运行时创建数据库表（如果有表，不会创建表）
  #      none：不会创建数据库

lhz:
  project:
    title: 李昊哲-小课
    slogan: 桃李不言下自成蹊
    map: { "B": "https://space.bilibili.com/480308139","C": "https://blog.csdn.net/qq_24330181" }
    list:
      - https://space.bilibili.com/480308139
      - https://blog.csdn.net/qq_24330181
    lhzSite:
      name: 李昊哲-小课
      url: https://space.bilibili.com/480308139
    siteList:
      - name: 李昊哲-小课 B站
        url: https://space.bilibili.com/480308139
      - name: 李昊哲-小课 C站
        url: https://blog.csdn.net/qq_24330181

启动 springboot 项目

scala springboot

浏览器测试

scala springboot

文章来源:https://blog.csdn.net/qq_24330181/article/details/135132722
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