SpringBoot与MybatisPlus3.X整合之字段类型处理器(八)

• pom.xml

  <dependencies>
          <dependency>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-starter</artifactId>
          </dependency>
          <dependency>
              <groupId>com.baomidou</groupId>
              <artifactId>mybatis-plus-boot-starter</artifactId>
              <version>3.2.0</version>
          </dependency>
          <dependency>
              <groupId>org.projectlombok</groupId>
              <artifactId>lombok</artifactId>
          </dependency>
          <!-- https://mvnrepository.com/artifact/p6spy/p6spy -->
          <dependency>
              <groupId>p6spy</groupId>
              <artifactId>p6spy</artifactId>
              <version>3.8.0</version>
          </dependency>
          <dependency>
              <groupId>com.h2database</groupId>
              <artifactId>h2</artifactId>
              <scope>runtime</scope>
          </dependency>
  ​
          <dependency>
              <groupId>com.alibaba</groupId>
              <artifactId>fastjson</artifactId>
              <version>1.2.49</version>
              <scope>test</scope>
          </dependency>
          <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
          <dependency>
              <groupId>com.fasterxml.jackson.core</groupId>
              <artifactId>jackson-databind</artifactId>
              <version>2.10.0</version>
          </dependency>
  ​
          <!-- for testing -->
          <dependency>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-starter-test</artifactId>
              <scope>test</scope>
          </dependency>
      </dependencies>

• 配置类

  @Configuration
  @MapperScan("com.mp.typehandler.mapper")
  public class MybatisPlusConfig {
  ​
  }

• application.yml

  spring:
    datasource:
      driver-class-name: com.p6spy.engine.spy.P6SpyDriver
      url: jdbc:p6spy:h2:tcp://192.168.180.115:19200/~/mem/test
      username: root
      password: test

• 实体类

  @Data
  public class Currency {
      /**
       * 类型: 人民币 RMB , 美元 USD
       */
      private String type;
      /**
       * 金额
       */
      private Double amount;
  ​
  }
  @Data
  public class OtherInfo {
      /**
       * 性别
       */
      private String sex;
      /**
       * 居住城市
       */
      private String city;
  ​
  }
  ​
  Data
  @Accessors(chain = true)
  @TableName(value="user",autoResultMap = true)
  public class User {
      private Long id;
      private String name;
      private Integer age;
      private String email;
  ​
      /**
       * 注意！！ 必须开启映射注解
       *
       * @TableName(autoResultMap = true)
       *
       * 以下两种类型处理器，二选一 也可以同时存在
       *
       * 注意！！选择对应的 JSON 处理器也必须存在对应依赖包
       */
      @TableField(typeHandler = JacksonTypeHandler.class)
      private Wallet wallet;
  ​
      @TableField(typeHandler = FastjsonTypeHandler.class)
      private OtherInfo otherInfo;
  ​
  }
  @Data
  public class Wallet {
      /**
       * 名称
       */
      private String name;
      /**
       * 各种货币
       */
      private List<Currency> currencyList;
  ​
  }
  ​

• mapper

  public interface UserMapper extends BaseMapper<User> {
  ​
  }

• 数据库脚本

  DELETE FROM user;
  ​
  INSERT INTO user (id, name, age, email, wallet, other_info) VALUES
  (1, 'Jone', 18, 'test1@baomidou.com', '{
      "name": "支付宝钱包",
      "currencyList": [{
          "type": "USD",
          "amount": 999.19
      },{
          "type": "RMB",
          "amount": 1000.19
      }]
  }', '{
          "sex": "男",
          "city": "南昌"
  }'),
  (2, 'Jack', 20, 'test2@baomidou.com', '{
      "name": "微信钱包",
      "currencyList": [{
          "type": "USD",
          "amount": 888.18
      },{
          "type": "RMB",
          "amount": 1000.18
      }]
  }', '{
          "sex": "男",
          "city": "青岛"
  }');
  ​
  DROP TABLE IF EXISTS user;
  ​
  CREATE TABLE user
  (
      id BIGINT(20) NOT NULL COMMENT '主键ID',
      name VARCHAR(30) NULL DEFAULT NULL COMMENT '姓名',
      age INT(11) NULL DEFAULT NULL COMMENT '年龄',
      email VARCHAR(50) NULL DEFAULT NULL COMMENT '邮箱',
      wallet VARCHAR(3000) NULL DEFAULT NULL COMMENT '钱包',
      other_info VARCHAR(3000) NULL DEFAULT NULL COMMENT '其他信息',
      PRIMARY KEY (id)
  );
  ​

• 测试类

  @SpringBootTest
  public class TypehandlerApplicationTests {
  ​
  ​
      @Autowired
      private UserMapper userMapper;
  ​
     
      @Test
      public void test() {
          User Jone = userMapper.selectById(1);
          System.err.println(Jone.getName());
          System.err.println(Jone.getOtherInfo().getSex());
  ​
          User Jack = userMapper.selectById(1);
          System.err.println(Jack.getName());
      }
  ​
  }

• 测试结果

   Consume Time：7 ms 2019-10-30 20:13:03
   Execute SQL：SELECT * FROM user WHERE id=1 
  ​
  Jone
  男
   Consume Time：0 ms 2019-10-30 20:13:03
   Execute SQL：SELECT * FROM user WHERE id=1 
  ​
  Jone