ssh框架 全注解编程

//当前的类是一个持久化类，是Category这个类。他映射了一个表category。所对应的 数据库是users

//这句：@Table(name = "category", catalog = "users")  可以省略

@Entity

@Table(name = "category", catalog = "users")

public class Category implements java.io.Serializable {

 private static final long serialVersionUID = 3240281547213597385L;

 private Integer id;

 private String name;

 private String description;

 private Set<Product> products = new HashSet<Product>(0);

 public Category() {

 }

 public Category(String name, String description, Set<Product> products) {

  this.name = name;

  this.description = description;

  this.products = products;

 }

 // 主键 ：@Id    主键生成方式：strategy = "increment"

 //映射表中id这个字段，不能为空，并且是唯一的

 @GenericGenerator(name = "generator", strategy = "increment")

 @Id

 @GeneratedValue(generator = "generator")

 @Column(name = "id", unique = true, nullable = false)

 public Integer getId() {

  return this.id;

 }

 public void setId(Integer id) {

  this.id = id;

 }

 //映射表中name这个字段 ，长度是500

 @Column(name = "name", length = 500)

 public String getName() {

  return this.name;

 }

 public void setName(String name) {

  this.name = name;

 }

 //映射表中description这个字段 ，长度是500

 @Column(name = "description", length = 500)

 public String getDescription() {

  return this.description;

 }