The annotation XmlSchemaType defines a mapping between an arbitrary Java type and a simple schema built-in type. Most of the time the default mapping is satisfactory, but every now and then an alternative may be more convenient. Let's assume that the…

For some Java container types JAXB has no built-in mapping to an XML structure. Also, you may want to represent Java types in a way that is entirely different from what JAXB is apt to do. Such mappings require an adapter class, written as an extensio…

一.结构 二.Hibernate支持的UserTypes接口  UserType —You can transform values by interacting with the plain JDBC PreparedStatement (when storing data) and ResultSet (when loading data).By implementing this interface, you can also control how Hibernate caches a…

一.简介 1. 2. 3. 4. to override this default mapping. The JPA specification has a convenient shortcut annotation for this purpose, @Lob @Entity public class Item { @Lob protected byte[] image; @Lob protected String description; // ... } This maps the by…

A class that describes an XML element that is to be a top-level element, i.e., one that can function as an XML document, should be annotated with XmlRootElement. Its optional elements are name and namespace. By default, the class name is used as the…

If JAXB binds a class to XML, then, by default, all public members will be bound, i.e., public getter and setter pairs, or public fields. Any protected, package-visible or private member is bound if it is annotated with a suitable annotation such as …

The basic annotation for a field that's intended to be an element is XmlElement. It permits you to define the XML element name, the namespace, whether it is optional or nillable, a default value and the Java class. Here are two annotated fields, and…

MySQL Type Java Type ---------- --------- CHAR String VARCHAR String LONGVARCHAR String NUMERIC java.math.BigDecimal DECIMAL java.math.BigDecimal BIT boolean TINYINT byte SMALLINT short INTEGER int BIGINT long REAL float FLOAT double DOUBLE double BI…

This annotation adds information that would be available from a schema type, but isn't implied by a Java class declaration. The annotation has several attributes: factoryClass and factoryMethod define the class containing a no-argument method for cre…

This annotation can only be used with a package. It defines parameters that are derived from the xsd:schema element. It must be written on a file package-info.java situated in the package. Below is an example, specifying the namespace and elementForm…