JPA how do I persist a String into a database field type MYSQL Text

Question

The requirement is that the user can write an article  therefore I choose type Text for the content field inside mysql database  How can I convert Java String into MySQL Text  Here you go Jim Tough   Entity public class Article implements Serializable       private static final long serialVersionUID   1L       Id      GeneratedValue strategy   GenerationType AUTO      private Long id       private Long userId       private String title       private String content       private Integer vote         Constructors  setters  getters  equals and hashcode     In my MYSQL database  content is type Text   I was hoping that there would be something like this java sql Text  since java sql Blob is an actual type  but sadly  that does not exist

User · Answer

With  Lob I always end up with a LONGTEXTin MySQL   To get TEXT I declare it that way  JPA 2 0     Column columnDefinition    TEXT   private String text   Find this better  because I can directly choose which Text-Type the column will have in database   For columnDefinition it is also good to read this   EDIT  Please pay attention to Adam Siemions comment and check the database engine you are using  before applying columnDefinition    TEXT

User · Answer

Since you re using JPA  use the Lob annotation  and optionally the Column annotation   Here is what the JPA specification says about it      9 1 19 Lob Annotation      A Lob annotation specifies that a   persistent property or field should be   persisted as a large object to a   database-supported large object type    Portable applications should use the   Lob annotation when mapping to a   database Lob type  The Lob annotation   may be used in conjunction with the   Basic annotation  A Lob may be   either a binary or character type  The   Lob type is inferred from the type of   the persistent field or property  and   except for string and character-based   types defaults to Blob    So declare something like this    Lob   Column name  CONTENT   length 512  private String content    References   JPA 1 0 specification    Section 9 1 19  Lob Annotation

User · Answer

for mysql  text      Column columnDefinition    TEXT   private String description    for mysql  longtext     Lob private String description

[java] JPA: how do I persist a String into a database field, type MYSQL Text

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