Kotlin之data与mybatis映射的坑

 <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.35</version>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-stdlib-jdk8</artifactId>
            <version>${kotlin.version}</version>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-test</artifactId>
            <version>${kotlin.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.0</version>
        </dependency>
    </dependencies>
    <build>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*</include>
                </includes>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.jetbrains.kotlin</groupId>
                <artifactId>kotlin-maven-plugin</artifactId>
                <version>${kotlin.version}</version>
                <executions>
                    <execution>
                        <id>compile</id>
                        <phase>compile</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>test-compile</id>
                        <phase>test-compile</phase>
                        <goals>
                            <goal>test-compile</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <jvmTarget>1.8</jvmTarget>
                </configuration>
            </plugin>
        </plugins>
    </build>

 <build>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*</include>
                </includes>
            </resource>
        </resources>
  </build>

server:
  port: 8080
spring:
  freemarker:
    suffix: .ftl                                 # 设置模板后缀名
    content-type: text/html                      # 设置文档类型
    charset: UTF-8                               # 设置页面编码格式
    cache: false                                 # 设置页面缓存
    template-loader-path: classpath:/templates   # 设置ftl文件路径
    check-template-location: true
      static-path-pattern: /static
  datasource:
    url: jdbc:mysql://localhost:3306/app?useUnicode=true&characterEncoding=utf-8
    username: root
    password: 12345678
mybatis:
  mapper-locations: classpath:mybatis/mapper/*.xml
logging:
  level:
      mapper: debug

data class Movie(val id: Int = 0,
 val title: String, 
 var brief: String?,
  var directors: String? = null, 
  var actors: String? = null,
   var categoryId: Int = 0,
   val pic:String,
   val parentCategoryId:Int = 0) 

<resultMap id="movie" type="app.entity.Movie">
        <result property="id" column="ic"/>
        <result column="title" property="title"/>
        <result column="brief" property="brief"/>
        <result column="directors" property="directors"/>
        <result column="actors" property="actors"/>
        <result column="category_id" property="categoryId"/>
        <result column="pic" property="pic"/>
        <result column="parent_category_id" property="parentCategoryId"/>
    </resultMap>
 <select id="indexMovie" resultMap="movie">
        <bind name="off_set" value="(page-1)*pageSize"></bind>
        select * from movie
        <choose>
            <when test="category==1"></when>
            <otherwise>
                <where>
                    <choose>
                        <when test="parentId ==0">
                            parent_category_id = #{category}
                        </when>
                        <otherwise>
                            category_id = #{category}
                        </otherwise>
                    </choose>
                </where>
            </otherwise>
        </choose>
        <if test="page>0">
            limit #{off_set},#{pageSize}
    </select>

 data class Menu(val id: Int) {
    val name: String? = null
    val status: Int = 0
    val parent: Int = 0
    val link: String? = null
data class MainMenu(val id: Int) {
    val name: String? = null
    val status: Int = 0
    val parent: Int = 0
    val link: String? = null
    open var subs: List<Menu> = mutableListOf()
}

 <resultMap id="menu" type="app.entity.MainMenu">
        <id column="id" property="id"/>
        <result column="name" property="name"/>
        <result column="status" property="status"/>
        <result column="parent" property="parent"/>
        <result column="link" property="link"/>
        <collection property="subs" ofType="app.entity.Menu">
            <id column="child_id" property="id"/>
            <result column="child_name" property="name"/>
            <result column="child_status" property="status"/>
            <result column="child_parent" property="parent"/>
            <result column="child_link" property="link"/>
        </collection>
    </resultMap>

data class Resource(var  id: Int) {
    constructor():this(id=0)
    var  status: Int = 0
    var link: String?=null
    var movieId: Int = 0
    var type:ResourceType? = null
data class ResourceType(val id:Int = 0) {
    var type: String  =""
 <resultMap id="resource" type="app.entity.Resource">
            <id column="id" javaType="java.lang.Integer"/>
        <result column="status" property="status"/>
        <result column="link" property="link"/>
        <result column="movie_id" property="movieId"/>
        <association property="type" javaType="app.entity.ResourceType">
            <id column="type_id" property="id"/>
            <result property="type" column="type_type"/>