• Hibernate关系映射


    一、一对一双向外键关联【Husband-Wife】

    Husband.java

    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import javax.persistence.Entity;
     4 import javax.persistence.GeneratedValue;
     5 import javax.persistence.Id;
     6 import javax.persistence.JoinColumn;
     7 import javax.persistence.OneToOne;
     8 
     9 @Entity
    10 public class Husband
    11 {
    12     private int id;
    13     private String name;
    14     private Wife wife;
    15 
    16     @OneToOne
    17     @JoinColumn(name="wifeId")
    18     public Wife getWife()
    19     {
    20         return wife;
    21     }
    22 
    23     public void setWife(Wife wife)
    24     {
    25         this.wife = wife;
    26     }
    27 
    28     @Id
    29     @GeneratedValue
    30     public int getId()
    31     {
    32         return id;
    33     }
    34 
    35     public void setId(int id)
    36     {
    37         this.id = id;
    38     }
    39 
    40     public String getName()
    41     {
    42         return name;
    43     }
    44 
    45     public void setName(String name)
    46     {
    47         this.name = name;
    48     }
    49 
    50 }

    Wife.java

    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import javax.persistence.CascadeType;
     4 import javax.persistence.Entity;
     5 import javax.persistence.GeneratedValue;
     6 import javax.persistence.Id;
     7 import javax.persistence.JoinColumn;
     8 import javax.persistence.OneToOne;
     9 
    10 @Entity
    11 public class Wife
    12 {
    13     private int id;
    14     private String name;
    15     private Husband husband=new Husband();
    16 
    17     @OneToOne(mappedBy="wife",cascade=CascadeType.ALL)    
    18     public Husband getHusband()
    19     {
    20         return husband;
    21     }
    22 
    23     public void setHusband(Husband husband)
    24     {
    25         this.husband = husband;
    26     }
    27 
    28     @Id
    29     @GeneratedValue
    30     public int getId()
    31     {
    32         return id;
    33     }
    34 
    35     public void setId(int id)
    36     {
    37         this.id = id;
    38     }
    39 
    40     public String getName()
    41     {
    42         return name;
    43     }
    44 
    45     public void setName(String name)
    46     {
    47         this.name = name;
    48     }
    49 }

    生成的SQL语句如下:

    View Code
     1 16:06:06,578  INFO SchemaExport:226 - Running hbm2ddl schema export
     2 16:06:06,578 DEBUG SchemaExport:242 - import file not found: /import.sql
     3 16:06:06,578  INFO SchemaExport:251 - exporting generated schema to database
     4 16:06:06,765 DEBUG SchemaExport:377 - 
     5     drop table Husband cascade constraints
     6 16:06:06,906 DEBUG SchemaExport:377 - 
     7     drop table Wife cascade constraints
     8 16:06:06,968 DEBUG SchemaExport:377 - 
     9     drop sequence hibernate_sequence
    10 16:06:06,984 DEBUG SchemaExport:377 - 
    11     create table Husband (
    12         id number(10,0) not null,
    13         name varchar2(255 char),
    14         wifeId number(10,0),
    15         primary key (id)
    16     )
    17 16:06:07,062 DEBUG SchemaExport:377 - 
    18     create table Wife (
    19         id number(10,0) not null,
    20         name varchar2(255 char),
    21         primary key (id)
    22     )
    23 16:06:07,109 DEBUG SchemaExport:377 - 
    24     alter table Husband 
    25         add constraint FKAEEA401BD5255EDF 
    26         foreign key (wifeId) 
    27         references Wife
    28 16:06:07,109 DEBUG SchemaExport:377 - 
    29     create sequence hibernate_sequence
    30 16:06:07,109  INFO SchemaExport:268 - schema export complete

    生成的表结构如下:

    二、一对多单向关联【UserGroup-User】

    User.java

    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import javax.persistence.Entity;
     4 import javax.persistence.GeneratedValue;
     5 import javax.persistence.Id;
     6 import javax.persistence.Table;
     7 
     8 @Entity
     9 @Table(name = "t_User")
    10 public class User
    11 {
    12     private int id;
    13     private String name;
    14 
    15     public User()
    16     {
    17 
    18     }
    19 
    20     public User(String name)
    21     {
    22         super();
    23         this.name = name;
    24     }
    25 
    26     @Id
    27     @GeneratedValue
    28     public int getId()
    29     {
    30         return id;
    31     }
    32 
    33     public void setId(int id)
    34     {
    35         this.id = id;
    36     }
    37 
    38     public String getName()
    39     {
    40         return name;
    41     }
    42 
    43     public void setName(String name)
    44     {
    45         this.name = name;
    46     }
    47 
    48 }

    UserGroup.java

    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import java.util.HashSet;
     4 import java.util.Set;
     5 
     6 import javax.persistence.CascadeType;
     7 import javax.persistence.Entity;
     8 import javax.persistence.GeneratedValue;
     9 import javax.persistence.Id;
    10 import javax.persistence.JoinColumn;
    11 import javax.persistence.OneToMany;
    12 
    13 @Entity
    14 public class UserGroup
    15 {
    16     private int id;
    17     private String name;
    18     private Set<User> moreUsers=new HashSet<User>();
    19     
    20     @OneToMany(cascade=CascadeType.ALL)    
    21     @JoinColumn(name="groupId") //向多的一方(User)加外键,必须要指定外键的名称,否则会出现中间表
    22     public Set<User> getMoreUsers()
    23     {
    24         return moreUsers;
    25     }
    26 
    27     public void setMoreUsers(Set<User> moreUsers)
    28     {
    29         this.moreUsers = moreUsers;
    30     }
    31 
    32     @Id
    33     @GeneratedValue
    34     public int getId()
    35     {
    36         return id;
    37     }
    38 
    39     public void setId(int id)
    40     {
    41         this.id = id;
    42     }
    43 
    44     public String getName()
    45     {
    46         return name;
    47     }
    48 
    49     public void setName(String name)
    50     {
    51         this.name = name;
    52     }
    53 
    54 }

    生成的SQL语句如下:

    View Code
     1 16:17:23,625  INFO SchemaExport:226 - Running hbm2ddl schema export
     2 16:17:23,625 DEBUG SchemaExport:242 - import file not found: /import.sql
     3 16:17:23,625  INFO SchemaExport:251 - exporting generated schema to database
     4 16:17:23,781 DEBUG SchemaExport:377 - 
     5     drop table UserGroup cascade constraints
     6 16:17:23,812 DEBUG SchemaExport:377 - 
     7     drop table t_User cascade constraints
     8 16:17:23,828 DEBUG SchemaExport:377 - 
     9     drop sequence hibernate_sequence
    10 16:17:23,828 DEBUG SchemaExport:377 - 
    11     create table UserGroup (
    12         id number(10,0) not null,
    13         name varchar2(255 char),
    14         primary key (id)
    15     )
    16 16:17:23,906 DEBUG SchemaExport:377 - 
    17     create table t_User (
    18         id number(10,0) not null,
    19         name varchar2(255 char),
    20         groupId number(10,0),
    21         primary key (id)
    22     )
    23 16:17:23,968 DEBUG SchemaExport:377 - 
    24     alter table t_User 
    25         add constraint FKCB5540D68698CAAC 
    26         foreign key (groupId) 
    27         references UserGroup
    28 16:17:23,968 DEBUG SchemaExport:377 - 
    29     create sequence hibernate_sequence
    30 16:17:23,968  INFO SchemaExport:268 - schema export complete

    生成的表结构如下:

    插入数据:

    View Code
     1 @Test
     2     public void testUserGroupAdd()
     3     {
     4         Transaction transaction = null;
     5         try
     6         {
     7             Session session = sessionFactory.getCurrentSession();
     8             transaction = session.beginTransaction();
     9             UserGroup group=new UserGroup();
    10             group.setName("组1");
    11             User u1=new User("张三");            
    12             User u2=new User("李四");
    13             User u3=new User("王武");
    14             group.getMoreUsers().add(u1);
    15             group.getMoreUsers().add(u2);
    16             group.getMoreUsers().add(u3);
    17             session.save(group);
    18 
    19             transaction.commit();
    20         }
    21         catch (Exception e)
    22         {
    23             e.printStackTrace();
    24             transaction.rollback();
    25         }
    26     }

    三、多对一单向关联【User-UserGroup】

    User.java

    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import javax.persistence.CascadeType;
     4 import javax.persistence.Entity;
     5 import javax.persistence.GeneratedValue;
     6 import javax.persistence.Id;
     7 import javax.persistence.JoinColumn;
     8 import javax.persistence.ManyToOne;
     9 import javax.persistence.Table;
    10 
    11 @Entity
    12 @Table(name = "t_User")
    13 public class User
    14 {
    15     private int id;
    16     private String name;
    17     private UserGroup userGroup=new UserGroup();
    18 
    19     public User()
    20     {
    21 
    22     }
    23 
    24     public User(String name)
    25     {
    26         super();
    27         this.name = name;
    28     }
    29 
    30     @Id
    31     @GeneratedValue
    32     public int getId()
    33     {
    34         return id;
    35     }
    36 
    37     public void setId(int id)
    38     {
    39         this.id = id;
    40     }
    41 
    42     @ManyToOne(cascade=CascadeType.ALL)
    43     @JoinColumn(name = "userGroupId")
    44     public UserGroup getUserGroup()
    45     {
    46         return userGroup;
    47     }
    48 
    49     public void setUserGroup(UserGroup userGroup)
    50     {
    51         this.userGroup = userGroup;
    52     }
    53 
    54     public String getName()
    55     {
    56         return name;
    57     }
    58 
    59     public void setName(String name)
    60     {
    61         this.name = name;
    62     }
    63 
    64 }

    UserGroup.java

    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import javax.persistence.Entity;
     4 import javax.persistence.GeneratedValue;
     5 import javax.persistence.Id;
     6 
     7 @Entity
     8 public class UserGroup
     9 {
    10     private int id;
    11     private String name;
    12 
    13     @Id
    14     @GeneratedValue
    15     public int getId()
    16     {
    17         return id;
    18     }
    19 
    20     public void setId(int id)
    21     {
    22         this.id = id;
    23     }
    24 
    25     public String getName()
    26     {
    27         return name;
    28     }
    29 
    30     public void setName(String name)
    31     {
    32         this.name = name;
    33     }
    34 
    35 }

    表结构与生成的SQL语句同二。

    插入数据:

    View Code
     1 @Test
     2     public void testUserAdd()
     3     {
     4         Transaction transaction = null;
     5         try
     6         {
     7             Session session = sessionFactory.getCurrentSession();
     8             transaction = session.beginTransaction();
     9             User u1 = new User("张三");
    10             u1.getUserGroup().setName("组1");
    11             User u2 = new User("李四");
    12             u2.getUserGroup().setName("组1");
    13             User u3 = new User("王武");
    14             u3.getUserGroup().setName("组1");
    15 
    16             session.save(u1);
    17             session.save(u2);
    18             session.save(u3);
    19 
    20             transaction.commit();
    21         }
    22         catch (Exception e)
    23         {
    24             e.printStackTrace();
    25             transaction.rollback();
    26         }
    27     }

    四、一对多,多对一双向关联【User-UserGroup】

    User.java

    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import javax.persistence.CascadeType;
     4 import javax.persistence.Entity;
     5 import javax.persistence.GeneratedValue;
     6 import javax.persistence.Id;
     7 import javax.persistence.JoinColumn;
     8 import javax.persistence.ManyToOne;
     9 import javax.persistence.Table;
    10 
    11 @Entity
    12 @Table(name = "t_User")
    13 public class User
    14 {
    15     private int id;
    16     private String name;
    17     private UserGroup userGroup;
    18 
    19     public User()
    20     {
    21 
    22     }
    23 
    24     public User(String name)
    25     {
    26         super();
    27         this.name = name;
    28     }
    29 
    30     @Id
    31     @GeneratedValue
    32     public int getId()
    33     {
    34         return id;
    35     }
    36 
    37     public void setId(int id)
    38     {
    39         this.id = id;
    40     }
    41 
    42     @ManyToOne
    43     @JoinColumn(name = "userGroupId")
    44     public UserGroup getUserGroup()
    45     {
    46         return userGroup;
    47     }
    48 
    49     public void setUserGroup(UserGroup userGroup)
    50     {
    51         this.userGroup = userGroup;
    52     }
    53 
    54     public String getName()
    55     {
    56         return name;
    57     }
    58 
    59     public void setName(String name)
    60     {
    61         this.name = name;
    62     }
    63 
    64 }

    UserGroup.java

    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import java.util.HashSet;
     4 import java.util.Set;
     5 
     6 import javax.persistence.CascadeType;
     7 import javax.persistence.Entity;
     8 import javax.persistence.GeneratedValue;
     9 import javax.persistence.Id;
    10 import javax.persistence.JoinColumn;
    11 import javax.persistence.OneToMany;
    12 
    13 @Entity
    14 public class UserGroup
    15 {
    16     private int id;
    17     private String name;
    18     private Set<User> moreUsers=new HashSet<User>();
    19     
    20     @OneToMany(mappedBy="userGroup",cascade=CascadeType.ALL)    
    21     public Set<User> getMoreUsers()
    22     {
    23         return moreUsers;
    24     }
    25 
    26     public void setMoreUsers(Set<User> moreUsers)
    27     {
    28         this.moreUsers = moreUsers;
    29     }
    30 
    31     @Id
    32     @GeneratedValue
    33     public int getId()
    34     {
    35         return id;
    36     }
    37 
    38     public void setId(int id)
    39     {
    40         this.id = id;
    41     }
    42 
    43     public String getName()
    44     {
    45         return name;
    46     }
    47 
    48     public void setName(String name)
    49     {
    50         this.name = name;
    51     }
    52 
    53 }

    表结构与生成的SQL语句同二。

    插入数据:

    View Code
     1 @Test
     2     public void testUserGroupAdd()
     3     {
     4         Transaction transaction = null;
     5         try
     6         {
     7             Session session = sessionFactory.getCurrentSession();
     8             transaction = session.beginTransaction();
     9             UserGroup group=new UserGroup();
    10             group.setName("组1");
    11             User u1=new User("张三");
    12             u1.setUserGroup(group);
    13             User u2=new User("李四");
    14             u2.setUserGroup(group);
    15             User u3=new User("王武");
    16             u3.setUserGroup(group);
    17             group.getMoreUsers().add(u1);
    18             group.getMoreUsers().add(u2);
    19             group.getMoreUsers().add(u3);
    20             session.save(group);
    21 
    22             transaction.commit();
    23         }
    24         catch (Exception e)
    25         {
    26             e.printStackTrace();
    27             transaction.rollback();
    28         }
    29     }

    五、多对多双向关联【Student-Teacher】

    Student.java

    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import java.util.Set;
     4 
     5 import javax.persistence.Entity;
     6 import javax.persistence.GeneratedValue;
     7 import javax.persistence.Id;
     8 import javax.persistence.ManyToMany;
     9 
    10 @Entity
    11 public class Student
    12 {
    13     private int id;
    14     private String name;
    15     private Set<Teacher> allTeacher;
    16 
    17     public Student()
    18     {
    19 
    20     }
    21 
    22     public Student(String name)
    23     {
    24         super();
    25         this.name = name;
    26     }
    27 
    28     @ManyToMany(mappedBy = "allStudent")
    29     public Set<Teacher> getAllTeacher()
    30     {
    31         return allTeacher;
    32     }
    33 
    34     public void setAllTeacher(Set<Teacher> allTeacher)
    35     {
    36         this.allTeacher = allTeacher;
    37     }
    38 
    39     @Id
    40     @GeneratedValue
    41     public int getId()
    42     {
    43         return id;
    44     }
    45 
    46     public void setId(int id)
    47     {
    48         this.id = id;
    49     }
    50 
    51     public String getName()
    52     {
    53         return name;
    54     }
    55 
    56     public void setName(String name)
    57     {
    58         this.name = name;
    59     }
    60 
    61 }

    Teacher.java

    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import java.util.HashSet;
     4 import java.util.Set;
     5 
     6 import javax.persistence.CascadeType;
     7 import javax.persistence.Entity;
     8 import javax.persistence.GeneratedValue;
     9 import javax.persistence.Id;
    10 import javax.persistence.JoinColumn;
    11 import javax.persistence.JoinTable;
    12 import javax.persistence.ManyToMany;
    13 
    14 @Entity
    15 public class Teacher
    16 {
    17     private int id;
    18     private String name;
    19     private Set<Student> allStudent=new HashSet<Student>();
    20 
    21     @ManyToMany(cascade=CascadeType.ALL)
    22     @JoinTable(name = "T_S_fk", joinColumns = { @JoinColumn(name = "tencher_idt") }, inverseJoinColumns = { @JoinColumn(name = "student_ids") })
    23     public Set<Student> getAllStudent()
    24     {
    25         return allStudent;
    26     }
    27 
    28     public void setAllStudent(Set<Student> allStudent)
    29     {
    30         this.allStudent = allStudent;
    31     }
    32 
    33     @Id
    34     @GeneratedValue
    35     public int getId()
    36     {
    37         return id;
    38     }
    39 
    40     public void setId(int id)
    41     {
    42         this.id = id;
    43     }
    44 
    45     public String getName()
    46     {
    47         return name;
    48     }
    49 
    50     public void setName(String name)
    51     {
    52         this.name = name;
    53     }
    54 }

    生成的SQL语句如下:(多对多的关联需要生成中间表,通过@joinTable指定中间表的名称)

    View Code
     1 16:38:56,187  INFO SchemaExport:226 - Running hbm2ddl schema export
     2 16:38:56,187 DEBUG SchemaExport:242 - import file not found: /import.sql
     3 16:38:56,187  INFO SchemaExport:251 - exporting generated schema to database
     4 16:38:56,343 DEBUG SchemaExport:377 - 
     5     drop table Student cascade constraints
     6 16:38:56,390 DEBUG SchemaExport:377 - 
     7     drop table T_S_fk cascade constraints
     8 16:38:56,515 DEBUG SchemaExport:377 - 
     9     drop table Teacher cascade constraints
    10 16:38:56,515 DEBUG SchemaExport:377 - 
    11     drop sequence hibernate_sequence
    12 16:38:56,531 DEBUG SchemaExport:377 - 
    13     create table Student (
    14         id number(10,0) not null,
    15         name varchar2(255 char),
    16         primary key (id)
    17     )
    18 16:38:56,578 DEBUG SchemaExport:377 - 
    19     create table T_S_fk (
    20         tencher_idt number(10,0) not null,
    21         student_ids number(10,0) not null,
    22         primary key (tencher_idt, student_ids)
    23     )
    24 16:38:56,625 DEBUG SchemaExport:377 - 
    25     create table Teacher (
    26         id number(10,0) not null,
    27         name varchar2(255 char),
    28         primary key (id)
    29     )
    30 16:38:56,656 DEBUG SchemaExport:377 - 
    31     alter table T_S_fk 
    32         add constraint FK94B8F93CFF45A8A9 
    33         foreign key (tencher_idt) 
    34         references Teacher
    35 16:38:56,671 DEBUG SchemaExport:377 - 
    36     alter table T_S_fk 
    37         add constraint FK94B8F93C87009DCD 
    38         foreign key (student_ids) 
    39         references Student
    40 16:38:56,671 DEBUG SchemaExport:377 - 
    41     create sequence hibernate_sequence
    42 16:38:56,671  INFO SchemaExport:268 - schema export complete

    生成的表结构如下:

    插入数据测试:

    View Code
     1 @Test
     2     public void testTeacher_MTM_Add()
     3     {
     4         Transaction transaction=null;
     5         try
     6         {
     7             Session session=sessionFactory.getCurrentSession();
     8             transaction=session.beginTransaction();
     9             Teacher t=new Teacher();
    10             t.setName("张三");
    11             t.getAllStudent().add(new Student("李四"));
    12             t.getAllStudent().add(new Student("王武"));
    13             t.getAllStudent().add(new Student("赵麻子"));
    14             session.save(t);            
    15             transaction.commit();
    16         }
    17         catch(Exception e)
    18         {
    19             e.printStackTrace();
    20             transaction.commit();
    21         }
    22     }

    六、补充

         1,组件映射通过@Embedded,将另一个实体列表嵌入到一张表中。【Husband-Wife】

    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import javax.persistence.Embedded;
     4 import javax.persistence.Entity;
     5 import javax.persistence.GeneratedValue;
     6 import javax.persistence.Id;
     7 import javax.persistence.JoinColumn;
     8 import javax.persistence.OneToOne;
     9 
    10 @Entity
    11 public class Husband
    12 {
    13     private int id;
    14     private String name;
    15     private Wife wife=new Wife();
    16 
    17     @Embedded
    18     public Wife getWife()
    19     {
    20         return wife;
    21     }
    22 
    23     public void setWife(Wife wife)
    24     {
    25         this.wife = wife;
    26     }
    27 
    28     @Id
    29     @GeneratedValue
    30     public int getId()
    31     {
    32         return id;
    33     }
    34 
    35     public void setId(int id)
    36     {
    37         this.id = id;
    38     }
    39 
    40     public String getName()
    41     {
    42         return name;
    43     }
    44 
    45     public void setName(String name)
    46     {
    47         this.name = name;
    48     }
    49 
    50 }
    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 public class Wife
     4 {
     5     private int wife_id;
     6     private String wife_name;
     7     private int age;
     8 
     9     public int getWife_id()
    10     {
    11         return wife_id;
    12     }
    13 
    14     public void setWife_id(int wife_id)
    15     {
    16         this.wife_id = wife_id;
    17     }
    18 
    19     public String getWife_name()
    20     {
    21         return wife_name;
    22     }
    23 
    24     public void setWife_name(String wife_name)
    25     {
    26         this.wife_name = wife_name;
    27     }
    28 
    29     public int getAge()
    30     {
    31         return age;
    32     }
    33 
    34     public void setAge(int age)
    35     {
    36         this.age = age;
    37     }
    38 
    39 }

      2,联合主键通过@JoinColumns指定联合主键的属性名称。【Husband-Wife】

    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import javax.persistence.Entity;
     4 import javax.persistence.GeneratedValue;
     5 import javax.persistence.Id;
     6 import javax.persistence.JoinColumn;
     7 import javax.persistence.JoinColumns;
     8 import javax.persistence.OneToOne;
     9 import javax.persistence.PrimaryKeyJoinColumn;
    10 
    11 @Entity
    12 public class Husband
    13 {
    14     private int id;
    15     private String name;
    16     private Wife wife;
    17     
    18     @OneToOne
    19     @JoinColumns(
    20             {
    21                 @JoinColumn(name="wifeId",referencedColumnName="id"),
    22                 @JoinColumn(name="wifeName",referencedColumnName="name")
    23             }
    24     )
    25     public Wife getWife()
    26     {
    27         return wife;
    28     }
    29 
    30     public void setWife(Wife wife)
    31     {
    32         this.wife = wife;
    33     }
    34 
    35     @Id
    36     @GeneratedValue
    37     public int getId()
    38     {
    39         return id;
    40     }
    41 
    42     public void setId(int id)
    43     {
    44         this.id = id;
    45     }
    46 
    47     public String getName()
    48     {
    49         return name;
    50     }
    51 
    52     public void setName(String name)
    53     {
    54         this.name = name;
    55     }
    56 
    57 }
    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import javax.persistence.CascadeType;
     4 import javax.persistence.EmbeddedId;
     5 import javax.persistence.Entity;
     6 import javax.persistence.OneToOne;
     7 
     8 @Entity
     9 public class Wife
    10 {
    11     private WifePK wifePK;
    12     private int age;
    13     private Husband husband=new Husband();
    14 
    15     @OneToOne(mappedBy = "wife", cascade = CascadeType.ALL)
    16     public Husband getHusband()
    17     {
    18         return husband;
    19     }
    20 
    21     public void setHusband(Husband husband)
    22     {
    23         this.husband = husband;
    24     }
    25 
    26     @EmbeddedId
    27     public WifePK getWifePK()
    28     {
    29         return wifePK;
    30     }
    31 
    32     public void setWifePK(WifePK wifePK)
    33     {
    34         this.wifePK = wifePK;
    35     }
    36 
    37     public int getAge()
    38     {
    39         return age;
    40     }
    41 
    42     public void setAge(int age)
    43     {
    44         this.age = age;
    45     }
    46 
    47 }
    View Code
     1 package org.xiong.hibernate.model;
     2 
     3 import java.io.Serializable;
     4 
     5 public class WifePK implements Serializable
     6 {
     7     /**
     8      * 
     9      */
    10     private static final long serialVersionUID = 1L;
    11     private int id;
    12     private String name;
    13 
    14     public int getId()
    15     {
    16         return id;
    17     }
    18 
    19     public void setId(int id)
    20     {
    21         this.id = id;
    22     }
    23 
    24     public String getName()
    25     {
    26         return name;
    27     }
    28 
    29     public void setName(String name)
    30     {
    31         this.name = name;
    32     }
    33 
    34     @Override
    35     public int hashCode()
    36     {
    37         final int prime = 31;
    38         int result = 1;
    39         result = prime * result + id;
    40         result = prime * result + ((name == null) ? 0 : name.hashCode());
    41         return result;
    42     }
    43 
    44     @Override
    45     public boolean equals(Object obj)
    46     {
    47         if (this == obj) return true;
    48         if (obj == null) return false;
    49         if (getClass() != obj.getClass()) return false;
    50         WifePK other = (WifePK) obj;
    51         if (id != other.id) return false;
    52         if (name == null)
    53         {
    54             if (other.name != null) return false;
    55         }
    56         else if (!name.equals(other.name)) return false;
    57         return true;
    58     }
    59 
    60 }
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  • 原文地址:https://www.cnblogs.com/xiongyu/p/2480850.html
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