如何在MyBatis中实现自定义的TypeHandler？需要遵循哪些步骤？

import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.TypeHandler;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.UUID;

public class UUIDTypeHandler implements TypeHandler<UUID> {

  // 将UUID类型参数设置到PreparedStatement中
  @Override
  public void setParameter(PreparedStatement ps, int i, UUID parameter, JdbcType jdbcType) throws SQLException {
    if (parameter != null) {
      ps.setString(i, parameter.toString());
    } else {
      ps.setNull(i, JdbcType.VARCHAR.TYPE_CODE);
    }
  }

  // 从ResultSet获取UUID字段（根据列名）
  @Override
  public UUID getResult(ResultSet rs, String columnName) throws SQLException {
    String uuidString = rs.getString(columnName);
    return uuidString != null ? UUID.fromString(uuidString) : null;
  }

  // 从ResultSet获取UUID字段（根据列索引）
  @Override
  public UUID getResult(ResultSet rs, int columnIndex) throws SQLException {
    String uuidString = rs.getString(columnIndex);
    return uuidString != null ? UUID.fromString(uuidString) : null;
  }

  // 从CallableStatement获取UUID字段
  @Override
  public UUID getResult(CallableStatement cs, int columnIndex) throws SQLException {
    String uuidString = cs.getString(columnIndex);
    return uuidString != null ? UUID.fromString(uuidString) : null;
  }
}

<configuration>
  <typeHandlers>
    <typeHandler handler="com.example.UUIDTypeHandler"/>
  </typeHandlers>
</configuration>

<resultMap id="exampleResultMap" type="com.example.YourModel">
  <result property="uuid" column="uuid_column" typeHandler="com.example.UUIDTypeHandler"/>
</resultMap>

@Select("SELECT uuid_column FROM example_table WHERE id = #{id}")
UUID getUUIDById(int id);