私はHibernate 4とSpring 3を使用しています。
私は2つのエンティティを持っています。
書籍実体
@Entity
@Table(name = "book")
public class Book implements Serializable {
public Book() {
}
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue( strategy = GenerationType.IDENTITY)
private int id;
@ManyToOne()
@JoinColumn( name = "author_id" )
private Author author;
private String name;
private int pages;
@Version
@Column( name = "VERSION")
private int version;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Author getAuthor() {
return author;
}
public void setAuthor(Author author) {
this.author = author;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getPages() {
return pages;
}
public void setPages(int pages) {
this.pages = pages;
}
public int getVersion() {
return version;
}
public void setVersion(int version) {
this.version = version;
}
}
および Author エンティティ
@Entity
@Table(name = "author")
public class Author implements Serializable {
public Author() {
}
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue( strategy = GenerationType.IDENTITY)
private int id;
private String name;
@OneToMany( mappedBy = "author", cascade = CascadeType.ALL, orphanRemoval = true)
private Set<Book> books = new HashSet<Book>();
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Set<Book> getBooks() {
return books;
}
public void setBooks(Set<Book> books) {
this.books = books;
}
public void addBook(Book book) {
book.setAuthor(this);
getBooks().add(book);
}
public void removeBook(Book book) {
getBooks().remove(book);
}
}
JSONはpom.xmlに依存します
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.1.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-hibernate4</artifactId>
<version>2.1.2</version>
</dependency>
私のルートコンテキストはここにあります -
<!-- Root Context: defines shared resources visible to all other web components -->
<context:annotation-config/>
<context:component-scan base-package="org.jar.libs.dao" />
<context:component-scan base-package="org.jar.libs.service" />
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="jspViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource"
p:driverClassName="com.mysql.jdbc.Driver" p:url="jdbc:mysql://localhost:3306/hibernate"
p:username="root" p:password="root" />
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="annotatedClasses">
<list>
<value>org.jar.libs.domain.Book</value>
<value>org.jar.libs.domain.Author</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
</bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
</beans>
...サーブレット-context.xml
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<context:component-scan base-package="org.jar.libs.controller" />
コントローラ。
@Controller
@RequestMapping (value = "books/rest")
public class BookController {
@Autowired
private BookService bookService;
// logger
private static final Logger logger = LoggerFactory.getLogger(BookController.class);
@SuppressWarnings("unchecked")
@RequestMapping( method = RequestMethod.GET )
public @ResponseBody List<Book> getBook() {
List<Book> res = bookService.findAll();
return res;
}
}
私のDAOのfindAll：
public List<Book> findAll() {
Session session = sessionFactory.getCurrentSession();
List<Book> result = (List<Book>) session.createQuery("select c from Book c").list();
return result;
}
デバッグでは、メソッドが 2 つのレコードを返すことがわかりますが、Spring は結果を JSON に変換できず、406 HTTP エラーを返します。どうしたの？
デバッグで見た画像を添付します。- http://tinypic.com/view.php?pic=35kvi9i&s=6