实体bean的开发

在desploy下创建数据源mysql-ds.xml

<?xml version="1.0" encoding="UTF-8"?>
<datasources>
  <local-tx-datasource> 
<jndi-name>zynDS</jndi-name> 
<use-java-context>false</use-java-context>
<connection-url>jdbc:mysql://localhost:3306/test?useUnicode=true&amp;characterEncoding=utf-8</connection-url> 
<driver-class>com.mysql.jdbc.Driver</driver-class> 
<user-name>root</user-name> 
<password>admin</password> 
<exception-sorter-class-name>org.
jboss.resource.adapter.jdbc.vendor.
MySQLExceptionSorter</exception-sorter-class-name> 
<metadata> 
<type-mapping>mySQL</type-mapping> 
</metadata> 
</local-tx-datasource> 
   
</datasources>

 在class路径下创建文件META-INF，在这个文件下创建persistence.xml，配置数据源

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
    http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
	version="1.0">
	<persistence-unit name="zyn">
		<jta-data-source>zynDS</jta-data-source>
		<properties>
			<property name="show_sql" value="true" />
			<property name="hibernate.hbm2ddl.auto" value="update" />
		</properties>
	</persistence-unit>
</persistence>

 开发实体对象

@Entity
@Table(name = "student")
public class Student extends DomainObject {

	/**
	 * 
	 */
	private static final long serialVersionUID = 9090499971596826674L;

	public Student() {
	}

	public Student(String name, int age, Long num) {
		this.name = name;
		this.age = age;
		this.num = num;
	}

	/**
	 * 业务主键ID，自增，增量1
	 */
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	@Id
	private Integer id;

	/**
	 * 学生姓名
	 */
	@Column(length = 10, name = "student_name", nullable = false)
	private String name = "";

	/**
	 * 学生年龄
	 */
	@Column(length = 2, name = "student_age", nullable = false)
	private Integer age = 0;

	/**
	 * 学号
	 */
	@Column(length = 4, name = "student_no", nullable = false)
	private Long num;

	@ManyToMany(fetch=FetchType.LAZY,mappedBy="students",cascade={CascadeType.MERGE,CascadeType.PERSIST})
	private Set<Teacher> teachers = new HashSet<Teacher>();
	@OneToOne(fetch=FetchType.EAGER,mappedBy="student",cascade=CascadeType.ALL,optional=true)
	private StudentInfo studentInfo ;
	
	public StudentInfo getStudentInfo() {
		return studentInfo;
	}

	public void setStudentInfo(StudentInfo studentInfo) {
		this.studentInfo = studentInfo;
	}

	public Set<Teacher> getTeachers() {
		return teachers;
	}

	public void setTeachers(Set<Teacher> teachers) {
		this.teachers = teachers;
	}

	public Long getNum() {
		return num;
	}

	public void setNum(Long num) {
		this.num = num;
	}

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public Integer getAge() {
		return age;
	}

	public void setAge(Integer age) {
		this.age = age;
	}
}

@SuppressWarnings("serial")
@Entity
@Table(name = "student_info")
public class StudentInfo extends DomainObject {
	public StudentInfo() {
	}

	public StudentInfo(String card, String address) {
		this.userCard = card;
		this.address = address;
	}

	// 使用当前对象中student属性的主键来作为本对象的主键
	@Id
	@GeneratedValue(generator = "pkGenerator")
	@GenericGenerator(name = "pkGenerator", strategy = "foreign", parameters = @Parameter(name = "property", value = "student"))
	private Integer id;

	/**
	 * 身份证号
	 */
	private String userCard;

	/**
	 * 详细地址
	 */
	private String address;
	@OneToOne(cascade = { CascadeType.PERSIST, CascadeType.MERGE }, optional = false)
	@PrimaryKeyJoinColumn
	private Student student;

	public Student getStudent() {
		return student;
	}

	public void setStudent(Student student) {
		this.student = student;
	}

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getUserCard() {
		return userCard;
	}

	public void setUserCard(String userCard) {
		this.userCard = userCard;
	}

	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}
}

@SuppressWarnings("serial")
@Entity
@Table(name = "teacher")
//@Cache(usage=CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class Teacher extends DomainObject {
	public Teacher() {
	}

	public Teacher(String name) {
		this.name = name;
	}

	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Integer id;

	@Column(name = "teacher_name",nullable=false)
	private String name;

	@ManyToMany(fetch=FetchType.LAZY,cascade={CascadeType.PERSIST,CascadeType.MERGE})
	@JoinTable(name = "teacher_student", joinColumns = @JoinColumn(name = "teacher_id",referencedColumnName="id"), inverseJoinColumns = @JoinColumn(name = "student_id",referencedColumnName="id"))
	@OrderBy("num DESC")
	private Set<Student> students = new HashSet<Student>();
	
	@OneToMany(mappedBy="teacher",fetch=FetchType.LAZY,cascade={CascadeType.MERGE,CascadeType.REMOVE})
	private Set<Course> courses = new HashSet<Course>();
	
	
	public Set<Course> getCourses() {
		return courses;
	}
	
	public void setCourses(Set<Course> courses) {
		this.courses = courses;
	}

	public Set<Student> getStudents() {
		return students;
	}

	public void setStudents(Set<Student> students) {
		this.students = students;
	}

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
}

 开发持久化接口和实现的bean

public interface StudentDao {
	public void persist(Student student);
	public void merge(Student student);
	public void getAll();
}
@Remote(value={StudentDao.class})
@Stateless
public class StudentDaoBean implements StudentDao{
	@PersistenceContext(unitName="zyn")
	private EntityManager entityManager ;
	
	public void persist(Student student) {
		this.entityManager.persist(student);
	}

	public void merge(Student student) {
		this.entityManager.merge(student);
	}

	public void getAll() {
	}

}

 

测试：

public class StudentDaoTest {
	private StudentDao studentDao ;
	private InitialContext context;

	@Before
	public void init() {
		try {
			context = new InitialContext();
			this.studentDao = (StudentDao)this.context.lookup("StudentDaoBean/remote");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	@Test
	public void save() {
		Student student = new Student("李四", 22, 20072724L);
		Teacher teacher1 = new Teacher("王老师");
		Teacher teacher2 = new Teacher("李老师");
		student.getTeachers().add(teacher1);
		student.getTeachers().add(teacher2);
		StudentInfo studentInfo = new StudentInfo("520000000000000000","成都市");
		studentInfo.setStudent(student);
		try {
			this.infoDao.persist(studentInfo);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}