1、本系统的后台使用mysql数据库，SSH 框架，前端使用ExtJs实现。因为系统需要用到权限管理，所以作此记录，权限管理精确到前端的每一个按钮，甚至每一个action请求。
废话不多说，直接进入主题
（一）、数据库的设计
权限管理部分总共包括4个数据表：
Power（记录权限）、 Role（记录角色）、 PowerRole（中间表）、 PowerUrl（记录每一个action请求或者前端按钮）
（Role表）
package com.txb.model;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
@Entity
@Table(name="TB_ROLE")
public class Role {
private int roleId;
private String roleName;
private Set<RolePower> rolePowers;
private Set<AdminRole> adminRoles;
@Id
@Column(name = "ROLE_ID", insertable = false, updatable = false, nullable = false, unique = true)
@GeneratedValue(strategy=GenerationType.AUTO)
public int getroleId() {
return roleId;
}
public void setroleId(int roleId) {
this.roleId = roleId;
}
@Column(name = "role_NAME", nullable = false, length = 50)
public String getroleName() {
return roleName;
}
public void setroleName(String roleName) {
this.roleName = roleName;
}
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "role")
public Set<RolePower> getrolePowers() {
return rolePowers;
}
public void setrolePowers(Set<RolePower> rolePowers) {
this.rolePowers = rolePowers;
}
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "role")
public Set<AdminRole> getAdminroles() {
return adminRoles;
}
public void setAdminroles(Set<AdminRole> adminRoles) {
this.adminRoles = adminRoles;
}
}
（Power表）
package com.txb.model;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
@Entity
@Table(name="TB_POWER")
public class Power {
private int powerId;
private String powerName;
private String powerType;
private String menu; //菜单
private Set<RolePower> rolePowers;
private Set<ActionUrl> actionUrls; //用户角色
@Id
@Column(name = "POWER_ID", insertable = false, updatable = false, nullable = false, unique = true)
@GeneratedValue(strategy=GenerationType.AUTO)
public int getPowerId() {
return powerId;
}
public void setPowerId(int powerId) {
this.powerId = powerId;
}
@Column(name="POWER_NAME", nullable = false, length = 50)
public String getPowerName() {
return powerName;
}
public void setPowerName(String powerName) {
this.powerName = powerName;
}
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "power")
public Set<RolePower> getRolePowers() {
return rolePowers;
}
public void setRolePowers(Set<RolePower> rolePowers) {
this.rolePowers = rolePowers;
}
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "power")
public Set<ActionUrl> getActionUrls() {
return actionUrls;
}
public void setActionUrls(Set<ActionUrl> actionUrls) {
this.actionUrls = actionUrls;
}
@Column(name="POWER_TYPE", nullable = false, length = 10)
public String getPowerType() {
return powerType;
}
public void setPowerType(String powerType) {
this.powerType = powerType;
}
@Column(name="POWER_MENU", nullable = true, length = 10)
public String getMenu() {
return menu;
}
public void setMenu(String menu) {
this.menu = menu;
}
}
（Role - Power 中间表，因为他们是多对多的关系）
package com.txb.model;
import java.io.Serializable;
import javax.persistence.*;
@Entity
@Table(name="TB_ROLE_POWER")
public class RolePower implements Serializable {
private int rpid;
private Power power;
private Role role;
public RolePower() {
}
@Id
@Column(name = "RP_ID", insertable = false, updatable = false, nullable = false, unique = true)
@GeneratedValue(strategy=GenerationType.AUTO)
public int getRpid() {
return this.rpid;
}
public void setRpid(int rpid) {
this.rpid = rpid;
}
@ManyToOne
@JoinColumn(name="POWER_ID")
public Power getPower() {
return this.power;
}
public void setPower(Power power) {
this.power = power;
}
@ManyToOne
@JoinColumn(name="ROLE_ID")
public Role getRole() {
return role;
}
public void setRole(Role role) {
this.role = role;
}
}
（PowerUrl 表，这个表是用来记录每一个action请求，判断该用户所拥有的权限是否能执行对应的action请求）
package com.txb.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
@Entity
@Table(name="TB_ACTION_URL")
public class ActionUrl {
private Power power;
private String url;
private String actionName;
private int aId;
@ManyToOne
@JoinColumn(name="POWER_ID")
public Power getPower() {
return power;
}
public void setPower(Power power) {
this.power = power;
}
@Column(name="URL", nullable = false, length = 50)
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
@Column(name="ACTION_NAME", nullable = false, length = 50)
public String getActionName() {
return actionName;
}
public void setActionName(String actionName) {
this.actionName = actionName;
}
@Id
@Column(name = "A_ID", insertable = false, updatable = false, nullable = false, unique = true)
@GeneratedValue(strategy=GenerationType.AUTO)
public int getaId() {
return aId;
}
public void setaId(int aId) {
this.aId = aId;
}
}
到此权限数据库就已经设计完毕，下一篇给大家介绍后台逻辑部分
