SpringBoot與MybatisPlus3.X整合之字段類型處理器(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>

   

• 配置類

  @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

• 實體類

  @Data
  public class Currency {
      /**
       * 類型: 人民幣 RMB , 美元 USD
       */
      private String type;
      /**
       * 金額
       */
      private Double amount;
  ​
  }
  @Data
  public class OtherInfo {
      /**
       * 性別
       */
      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！！ 必須開啟映射注解
       *
       * @TableName(autoResultMap = true)
       *
       * 以下兩種類型處理器，二選一 也可以同時存在
       *
       * 注意！！選擇對應的 JSON 處理器也必須存在對應依賴包
       */
      @TableField(typeHandler = JacksonTypeHandler.class)
      private Wallet wallet;
  ​
      @TableField(typeHandler = FastjsonTypeHandler.class)
      private OtherInfo otherInfo;
  ​
  }
  @Data
  public class Wallet {
      /**
       * 名稱
       */
      private String name;
      /**
       * 各種貨幣
       */
      private List<Currency> currencyList;
  ​
  }
  ​

   

• mapper

  public interface UserMapper extends BaseMapper<User> {
  ​
  }

• 數據庫腳本

  DELETE FROM user;
  ​
  INSERT INTO user (id, name, age, email, wallet, other_info) VALUES
  (1, 'Jone', 18, '[e-mail]', '{
      "name": "支付寶錢包",
      "currencyList": [{
          "type": "USD",
          "amount": 999.19
      },{
          "type": "RMB",
          "amount": 1000.19
      }]
  }', '{
          "sex": "男",
          "city": "南昌"
  }'),
  (2, 'Jack', 20, '[e-mail]', '{
      "name": "微信錢包",
      "currencyList": [{
          "type": "USD",
          "amount": 888.18
      },{
          "type": "RMB",
          "amount": 1000.18
      }]
  }', '{
          "sex": "男",
          "city": "青島"
  }');
  ​
  DROP TABLE IF EXISTS user;
  ​
  CREATE TABLE user
  (
      id BIGINT(20) NOT NULL COMMENT '主鍵ID',
      name VARCHAR(30) NULL DEFAULT NULL COMMENT '姓名',
      age INT(11) NULL DEFAULT NULL COMMENT '年齡',
      email VARCHAR(50) NULL DEFAULT NULL COMMENT '郵箱',
      wallet VARCHAR(3000) NULL DEFAULT NULL COMMENT '錢包',
      other_info VARCHAR(3000) NULL DEFAULT NULL COMMENT '其他信息',
      PRIMARY KEY (id)
  );
  ​

   

• 測試類

  @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());
      }
  ​
  }

   

• 測試結果

   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