JDBCTemplate RowMapper 读取 postgres 中的 jsonb 列 table

Question

我正在使用具有以下架构的 JDBCTemplate 阅读 Postgres table：

orderid|order_name|features|extra_features|

orderid: 整数
order_name: 文字
特征：josnb
extra_features: jsonb

订购 DTO：

public class Order{
  private Integer orderid;
  private String orderName;
  List<Features> features;
  List<ExtraFeatures> extraFeatures;
       ....

   getter & setter   
}

特征 DTO:

public class Features{
  private String featureName:
  private String featureValuel
}

现在，在执行 SELECT * FROM public.orders 查询时，我正在编写如下所示的 rowMapper： jdbcTemplate.query("SELECT * FROM public.orders", new OrderRowMapper())

RowMapper

public class OrderRowMapper implements RowMapper<Order>{
  @Override
  public Order mapRow(ResultSet rs, int rowNum) throws SQLException{
     Order order = new Order();
     order.setOrderid(rs.getInt("orderid"));
     order.setFeatures()// how to read jsonbcolumn?
  }
}

我可以设置除 jsonb 列之外的所有值，我不知道如何为此实现 RowMapper，请帮忙。

Answer 1


public class OrderRowMapper implements RowMapper<Order>{
  private ObjectMapper mapper = new ObjectMapper();

  @Override
  public Order mapRow(ResultSet rs, int rowNum) throws SQLException{

     List<Features> features = objectMapper
          .readValue(rs.getString("features"), 
                     new TypeReference<List<Features>>(){});
     Order order = new Order();
     order.setOrderid(rs.getInt("orderid"));
     order.setFeatures()// how to read jsonbcolumn?
  }
}

JDBCTemplate RowMapper 读取 postgres 中的 jsonb 列 table

JDBCTempalte RowMapper to read jsonb column in postgres table

java

postgresql

jdbctemplate

spring-boot

rowmapper