Java EE JPA 2 Entity Mappings

I have a MySQL database with the follow开发者_高级运维ing:

`title` text,
`content` longtext,

and have them mapped to the following Entity attributes:

private String title;
private String content;

Here are my questions:

1. When entering a value, does the JPA automatically detect the size of text and longtext, or do I have to annotate the attributes with @Column(length...)?
2. I have seen people using the @Lob annotation on strings. In this case would it be suitable to use it (and on which attributes)?

Thanks

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1. Add column attributes has only sense for varchar/char fields. Text/longtext couldn't be optimized by explicit length spec.
2. Use @Lob for both fields

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text datatype of MySQL is actually an LOB, or better say CLOB (character strings or LOB). So, yes it would be very much suitable to annotate it using @Lob.