项目中处理用户与角色的关系

用户：用户1，用户2

角色：管理员，一般用户

用户与角色的关系：多对多

一个用户可以有多个角色；一个角色可以被多个用户使用

用户：user

用户id,名称...

1      用户1

2      用户2

用户角色：user_role

用户id,角色id

1       1

1       2

2       2

角色：role

角色Id,名称

1      管理员

2      一般用户

查询出用户后；需要知道这个用户有哪些角色

1.User

package cn.itcast.nsfw.user.entity;

import java.io.Serializable;
import java.util.Date;
import java.util.List;

public class User implements Serializable {

private String id;//用户ID
private String dept;//部门
private String account;//账号
private String name;//用户名
private String password;//密码

private String headImg;//头像
private boolean gender;//性别
private String state;//状态
private String mobile;//手机号
private String email;//电子邮箱
private Date birthday;//生日
private String memo;//描述

private List<UserRole> userRoles;//用户角色

//用户状态
public static String USER_STATE_VALID = "1";//有效
public static String USER_STATE_INVALID = "0";//无效

public User() {
}
public User(String id, String dept, String account, String name, String password, String headImg, boolean gender, String state, String mobile, String email, Date birthday, String memo) {
this.id = id;
this.dept = dept;
this.account = account;
this.name = name;
this.password = password;
this.headImg = headImg;
this.gender = gender;
this.state = state;
this.mobile = mobile;
this.email = email;
this.birthday = birthday;
this.memo = memo;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getDept() {
return dept;
}
public void setDept(String dept) {
this.dept = dept;
}
public String getAccount() {
return account;
}
public void setAccount(String account) {
this.account = account;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getHeadImg() {
return headImg;
}
public void setHeadImg(String headImg) {
this.headImg = headImg;
}
public boolean isGender() {
return gender;
}
public void setGender(boolean gender) {
this.gender = gender;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getMobile() {
return mobile;
}
public void setMobile(String mobile) {
this.mobile = mobile;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getMemo() {
return memo;
}
public void setMemo(String memo) {
this.memo = memo;
}
public List<UserRole> getUserRoles() {
return userRoles;
}
public void setUserRoles(List<UserRole> userRoles) {
this.userRoles = userRoles;
}
}


2.UserRole
package cn.itcast.nsfw.user.entity;

import java.io.Serializable;

public class UserRole implements Serializable {

private UserRoleId id;

public UserRole() {
}

public UserRole(UserRoleId id) {
this.id = id;
}

public UserRoleId getId() {
return id;
}

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

}


3.UserRoleId
package cn.itcast.nsfw.user.entity;

import java.io.Serializable;

import cn.itcast.nsfw.role.entity.Role;

public class UserRoleId implements Serializable {

private Role role;
private String userId;

public UserRoleId() {
}
public UserRoleId(Role role, String userId) {
this.role = role;
this.userId = userId;
}
public Role getRole() {
return role;
}
public void setRole(Role role) {
this.role = role;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((role == null) ? 0 : role.hashCode());
result = prime * result + ((userId == null) ? 0 : userId.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
UserRoleId other = (UserRoleId) obj;
if (role == null) {
if (other.role != null)
return false;
} else if (!role.equals(other.role))
return false;
if (userId == null) {
if (other.userId != null)
return false;
} else if (!userId.equals(other.userId))
return false;
return true;
}

}


4.User.hbm.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class name="cn.itcast.nsfw.user.entity.User" table="user">
<id name="id" type="java.lang.String">
<column name="id" length="32" />
<generator class="uuid.hex" />
</id>
<property name="name" type="java.lang.String">
<column name="name" length="20" not-null="true" />
</property>
<property name="dept" type="java.lang.String">
<column name="dept" length="20" not-null="true" />
</property>
<property name="account" type="java.lang.String">
<column name="account" length="50" not-null="true" />
</property>
<property name="password" type="java.lang.String">
<column name="password" length="50" not-null="true" />
</property>
<property name="headImg" type="java.lang.String">
<column name="headImg" length="100" />
</property>
<property name="gender" type="java.lang.Boolean">
<column name="gender" />
</property>
<property name="email" type="java.lang.String">
<column name="email" length="50" />
</property>
<property name="mobile" type="java.lang.String">
<column name="mobile" length="20" />
</property>
<property name="birthday" type="java.util.Date">
<column name="birthday" length="10" />
</property>
<property name="state" type="java.lang.String">
<column name="state" length="1" />
</property>
<property name="memo" type="java.lang.String">
<column name="memo" length="200" />
</property>
</class>

</hibernate-mapping>


5.UserRole.hbm.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class name="cn.itcast.nsfw.user.entity.UserRole" table="user_role">
<composite-id name="id" class="cn.itcast.nsfw.user.entity.UserRoleId">
<key-many-to-one name="role" lazy="false" class="cn.itcast.nsfw.role.entity.Role">
<column name="role_id"></column>
</key-many-to-one>
<key-property name="userId" type="java.lang.String">
<column name="user_id" length="32"></column>
</key-property>
</composite-id>
</class>

</hibernate-mapping>