如何使用 JPA 将映射 JSON 列映射到 Java 对象

我们有一张很大的桌子，有很多列.移动到MySQL集群后，由于以下原因无法创建表:

ERROR 1118 (42000): Row size too large. The maximum row size for the used table type, not counting BLOBs, is 14000. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs

As an example:

@Entity @Table (name = "appconfigs", schema = "myproject")
public class AppConfig implements Serializable
{
    @Id @Column (name = "id", nullable = false)
    @GeneratedValue (strategy = GenerationType.IDENTITY)
    private int id;

    @OneToOne @JoinColumn (name = "app_id")
    private App app;

    @Column(name = "param_a")
    private ParamA parama;

    @Column(name = "param_b")
    private ParamB paramb;
}

这是一个存储配置参数的表格.我在想，我们可以将一些列合并成一个列，并将其存储为JSON对象，然后将其转换为一些Java对象.

For example:

@Entity @Table (name = "appconfigs", schema = "myproject")
public class AppConfig implements Serializable
{
    @Id @Column (name = "id", nullable = false)
    @GeneratedValue (strategy = GenerationType.IDENTITY)
    private int id;

    @OneToOne @JoinColumn (name = "app_id")
    private App app;

    @Column(name = "params")
    //How to specify that this should be mapped to JSON object?
    private Params params;
}

Where we have defined:

public class Params implements Serializable
{
    private ParamA parama;
    private ParamB paramb;
}

By using this we can combine all columns into one and create our table. Or we can split the whole table into several tables. Personally I prefer the first solution.

无论如何，我的问题是如何映射PARAMS列，该列是文本，包含Java对象的JSON字符串.