springBoot+springSecurity 数据库动态管理用户、角色、权限（二）

序：

本文使用springboot+mybatis＋SpringSecurity 实现数据库动态的管理用户、角色、权限管理

本文细分角色和权限，并将用户、角色、权限和资源均采用数据库存储，并且自定义滤器，代替原有的FilterSecurityInterceptor过滤器，

并分别实现AccessDecisionManager、InvocationSecurityMetadataSourceService和UserDetailsService，并在配置文件中进行相应配置。

spring security的简单原理：

使用众多的拦截器对url拦截，以此来管理权限。但是这么多拦截器，笔者不可能对其一一来讲，主要讲里面核心流程的两个。

首先，权限管理离不开登陆验证的，所以登陆验证拦截器AuthenticationProcessingFilter要讲；

还有就是对访问的资源管理吧，所以资源管理拦截器AbstractSecurityInterceptor要讲；

但拦截器里面的实现需要一些组件来实现，所以就有了AuthenticationManager、accessDecisionManager等组件来支撑。

现在先大概过一遍整个流程，用户登陆，会被AuthenticationProcessingFilter拦截，调用AuthenticationManager的实现，而且AuthenticationManager会调用ProviderManager来获取用户验证信息（不同的Provider调用的服务不同，因为这些信息可以是在数据库上，可以是在LDAP服务器上，可以是xml配置文件上等），如果验证通过后会将用户的权限信息封装一个User放到spring的全局缓存SecurityContextHolder中，以备后面访问资源时使用。

访问资源（即授权管理），访问url时，会通过AbstractSecurityInterceptor拦截器拦截，其中会调用FilterInvocationSecurityMetadataSource的方法来获取被拦截url所需的全部权限，在调用授权管理器AccessDecisionManager，这个授权管理器会通过spring的全局缓存SecurityContextHolder获取用户的权限信息，还会获取被拦截的url和被拦截url所需的全部权限，然后根据所配的策略（有：一票决定，一票否定，少数服从多数等），如果权限足够，则返回，权限不够则报错并调用权限不足页面。

重要

本文设计和代码是基于 上一篇博客（请点击）

springboot+mybatis＋SpringSecurity 实现用户角色数据库管理

进行修改。

本文目录：

1：数据库表设计

2：权限表的业务

3：springSecurity 配置修改

4：修改home.html 文件

5：修改HomeController.java 文件

6：测试检验

目录结构如下：

1：数据库表设计

由于本文增加了权限表所以本文的数据库表为5个分别是： 用户表、角色表、权限表、用户角色中间表、角色权限中间表



初始化数据

注意：Sys_permission 表的url通配符为两颗星，比如说 /user下的所有url，应该写成 /user/**;
权限的名字可以随意起名

insert into SYS_USER (id,username, password) values (1,'admin', 'admin');
insert into SYS_USER (id,username, password) values (2,'abel', 'abel');

insert into SYS_ROLE(id,name) values(1,'ROLE_ADMIN');
insert into SYS_ROLE(id,name) values(2,'ROLE_USER');

insert into SYS_ROLE_USER(SYS_USER_ID,ROLES_ID) values(1,1);
insert into SYS_ROLE_USER(SYS_USER_ID,ROLES_ID) values(2,2);

BEGIN;
INSERT INTO `Sys_permission` VALUES ('1', 'ROLE_HOME', 'home', '/', null), ('2', 'ROLE_ADMIN', 'ABel', '/admin', null);
COMMIT;

BEGIN;
INSERT INTO `Sys_permission_role` VALUES ('1', '1', '1'), ('2', '1', '2'), ('3', '2', '1');
COMMIT;

2：权限表的业务代码

2.1 java bean

Permission.java

package com.us.example.domain;

/**
* Created by yangyibo on 17/1/20.
*/
public class Permission {

private int id;
//权限名称
private String name;

//权限描述
private String descritpion;

//授权链接
private String url;

//父节点id
private int pid;

public int getId() {
return id;
}

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

public String getName() {
return name;
}

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

public String getDescritpion() {
return descritpion;
}

public void setDescritpion(String descritpion) {
this.descritpion = descritpion;
}

public String getUrl() {
return url;
}

public void setUrl(String url) {
this.url = url;
}

public int getPid() {
return pid;
}

public void setPid(int pid) {
this.pid = pid;
}
}

2.2 dao 层

在 com.us.example.dao 包下新建PermissionDao.java 文件。

PermissionDao.java

package com.us.example.dao;
import com.us.example.config.MyBatisRepository;
import com.us.example.domain.Permission;
import java.util.List;

/**
* Created by yangyibo on 17/1/20.
*/
public interface PermissionDao {
public List<Permission> findAll();
public List<Permission> findByAdminUserId(int userId);
}

在src/resource/mapper目录下新建对应的mapper.xml 文件

PermissionDaoMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.us.example.dao.PermissionDao">
<select id="findAll"  resultType="com.us.example.domain.Permission">

SELECT * from Sys_permission ;
</select>

<select id="findByAdminUserId" parameterType="int" resultType="com.us.example.domain.Permission">
select p.*
from Sys_User u
LEFT JOIN sys_role_user sru on u.id= sru.Sys_User_id
LEFT JOIN Sys_Role r on sru.Sys_Role_id=r.id
LEFT JOIN Sys_permission_role spr on spr.role_id=r.id
LEFT JOIN Sys_permission p on p.id =spr.permission_id
where u.id=#{userId}
</select>
</mapper>

3：springSecurity 配置修改

3.1 修改 WebSecurityConfig.java

修改com.us.example.config包下的 WebSecurityConfig.java 文件如下：

package com.us.example.config;

import com.us.example.service.CustomUserService;
import com.us.example.service.MyFilterSecurityInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.web.access.intercept.FilterSecurityInterceptor;

/**
* Created by yangyibo on 17/1/18.
*/

@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

@Autowired
private MyFilterSecurityInterceptor myFilterSecurityInterceptor;

@Bean
UserDetailsService customUserService(){ //注册UserDetailsService 的bean
return new CustomUserService();
}

@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
auth.userDetailsService(customUserService()); //user Details Service验证

}

@Override
protected void configure(HttpSecurity http) throws Exception {
http.authorizeRequests()
.anyRequest().authenticated() //任何请求,登录后可以访问
.and()
.formLogin()
.loginPage("/login")
.failureUrl("/login?error")
.permitAll() //登录页面用户任意访问
.and()
.logout().permitAll(); //注销行为任意访问
http.addFilterBefore(myFilterSecurityInterceptor, FilterSecurityInterceptor.class);
}
}

3.2 修改CustomUserService

修改CustomUserService.java 内容如下：

package com.us.example.service;

import com.us.example.dao.PermissionDao;
import com.us.example.dao.UserDao;
import com.us.example.domain.Permission;
import com.us.example.domain.SysRole;
import com.us.example.domain.SysUser;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

/**
* Created by yangyibo on 17/1/18.
*/
@Service
public class CustomUserService implements UserDetailsService { //自定义UserDetailsService 接口

@Autowired
UserDao userDao;
@Autowired
PermissionDao permissionDao;

public UserDetails loadUserByUsername(String username) {
SysUser user = userDao.findByUserName(username);
if (user != null) {
List<Permission> permissions = permissionDao.findByAdminUserId(user.getId());
List<GrantedAuthority> grantedAuthorities = new ArrayList <>();
for (Permission permission : permissions) {
if (permission != null && permission.getName()!=null) {

GrantedAuthority grantedAuthority = new SimpleGrantedAuthority(permission.getName());
//1：此处将权限信息添加到 GrantedAuthority 对象中，在后面进行全权限验证时会使用GrantedAuthority 对象。
grantedAuthorities.add(grantedAuthority);
}
}
return new User(user.getUsername(), user.getPassword(), grantedAuthorities);
} else {
throw new UsernameNotFoundException("admin: " + username + " do not exist!");
}
}

}

3.3 新增MyAccessDecisionManager

在com.us.example.service 包下新增

MyAccessDecisionManager.java 文件

package com.us.example.service;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.stereotype.Service;

import java.util.Collection;
import java.util.Iterator;

/**
* Created by yangyibo on 17/1/19.
*/
@Service
public class MyAccessDecisionManager implements AccessDecisionManager {

// decide 方法是判定是否拥有权限的决策方法，
//authentication 是释CustomUserService中循环添加到 GrantedAuthority 对象中的权限信息集合.
//object 包含客户端发起的请求的requset信息，可转换为 HttpServletRequest request = ((FilterInvocation) object).getHttpRequest();
//configAttributes 为MyInvocationSecurityMetadataSource的getAttributes(Object object)这个方法返回的结果，此方法是为了判定用户请求的url 是否在权限表中，如果在权限表中，则返回给 decide 方法，用来判定用户是否有此权限。如果不在权限表中则放行。
@Override
public void decide(Authentication authentication, Object object, Collection<ConfigAttribute> configAttributes) throws AccessDeniedException, InsufficientAuthenticationException {

if(null== configAttributes || configAttributes.size() <=0) {
return;
}
ConfigAttribute c;
String needRole;
for(Iterator<ConfigAttribute> iter = configAttributes.iterator(); iter.hasNext(); ) {
c = iter.next();
needRole = c.getAttribute();
for(GrantedAuthority ga : authentication.getAuthorities()) {//authentication 为在注释1 中循环添加到 GrantedAuthority 对象中的权限信息集合
if(needRole.trim().equals(ga.getAuthority())) {
return;
}
}
}
throw new AccessDeniedException("no right");
}

@Override
public boolean supports(ConfigAttribute attribute) {
return true;
}

@Override
public boolean supports(Class<?> clazz) {
return true;
}
}

3.4 新增 MyFilterSecurityInterceptor

在com.us.example.service 包下新增

MyFilterSecurityInterceptor.java 文件

package com.us.example.service;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.access.SecurityMetadataSource;
import org.springframework.security.access.intercept.AbstractSecurityInterceptor;
import org.springframework.security.access.intercept.InterceptorStatusToken;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;
import org.springframework.stereotype.Service;

import java.io.IOException;

/**
* Created by yangyibo on 17/1/19.
*/
@Service
public class MyFilterSecurityInterceptor extends AbstractSecurityInterceptor implements Filter {

@Autowired
private FilterInvocationSecurityMetadataSource securityMetadataSource;

@Autowired
public void setMyAccessDecisionManager(MyAccessDecisionManager myAccessDecisionManager) {
super.setAccessDecisionManager(myAccessDecisionManager);
}

@Override
public void init(FilterConfig filterConfig) throws ServletException {

}

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

FilterInvocation fi = new FilterInvocation(request, response, chain);
invoke(fi);
}

public void invoke(FilterInvocation fi) throws IOException, ServletException {
//fi里面有一个被拦截的url
//里面调用MyInvocationSecurityMetadataSource的getAttributes(Object object)这个方法获取fi对应的所有权限
//再调用MyAccessDecisionManager的decide方法来校验用户的权限是否足够
InterceptorStatusToken token = super.beforeInvocation(fi);
try {
//执行下一个拦截器
fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
} finally {
super.afterInvocation(token, null);
}
}

@Override
public void destroy() {

}

@Override
public Class<?> getSecureObjectClass() {
return FilterInvocation.class;
}

@Override
public SecurityMetadataSource obtainSecurityMetadataSource() {
return this.securityMetadataSource;
}
}

3.5 新增 MyInvocationSecurityMetadataSourceService

在com.us.example.service 包下新增MyInvocationSecurityMetadataSourceService.java文件

package com.us.example.service;

import com.us.example.dao.PermissionDao;
import com.us.example.domain.Permission;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.access.SecurityConfig;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpServletRequest;
import java.util.*;

/**
* Created by yangyibo on 17/1/19.
*/
@Service
public class MyInvocationSecurityMetadataSourceService  implements
FilterInvocationSecurityMetadataSource {

@Autowired
private PermissionDao permissionDao;

private HashMap<String, Collection<ConfigAttribute>> map =null;

/**
* 加载权限表中所有权限
*/
public void loadResourceDefine(){
map = new HashMap<>();
Collection<ConfigAttribute> array;
ConfigAttribute cfg;
List<Permission> permissions = permissionDao.findAll();
for(Permission permission : permissions) {
array = new ArrayList<>();
cfg = new SecurityConfig(permission.getName());
//此处只添加了用户的名字，其实还可以添加更多权限的信息，例如请求方法到ConfigAttribute的集合中去。此处添加的信息将会作为MyAccessDecisionManager类的decide的第三个参数。
array.add(cfg);
//用权限的getUrl() 作为map的key，用ConfigAttribute的集合作为 value，
map.put(permission.getUrl(), array);
}

}

//此方法是为了判定用户请求的url 是否在权限表中，如果在权限表中，则返回给 decide 方法，用来判定用户是否有此权限。如果不在权限表中则放行。
@Override
public Collection<ConfigAttribute> getAttributes(Object object) throws IllegalArgumentException {
if(map ==null) loadResourceDefine();
//object 中包含用户请求的request 信息
HttpServletRequest request = ((FilterInvocation) object).getHttpRequest();
AntPathRequestMatcher matcher;
String resUrl;
for(Iterator<String> iter = map.keySet().iterator(); iter.hasNext(); ) {
resUrl = iter.next();
matcher = new AntPathRequestMatcher(resUrl);
if(matcher.matches(request)) {
return map.get(resUrl);
}
}
return null;
}

@Override
public Collection<ConfigAttribute> getAllConfigAttributes() {
return null;
}

@Override
public boolean supports(Class<?> clazz) {
return true;
}
}

4：修改home.html 文件

修改src/resources/templates目录下 的home.html

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4">
<head>
<meta content="text/html;charset=UTF-8"/>
<title sec:authentication="name"></title>
<link rel="stylesheet" th:href="@{css/bootstrap.min.css}" />
<style type="text/css">
body {
padding-top: 50px;
}
.starter-template {
padding: 40px 15px;
text-align: center;
}
</style>
</head>
<body>
<nav class="navbar navbar-inverse navbar-fixed-top">
<div class="container">
<div class="navbar-header">
<a class="navbar-brand" href="#">Spring Security演示</a>
</div>
<div id="navbar" class="collapse navbar-collapse">
<ul class="nav navbar-nav">
<li><a th:href="@{/}"> 首页 </a></li>
<li><a th:href="@{/admin}"> admin </a></li>
</ul>
</div><!--/.nav-collapse -->
</div>
</nav>

<div class="container">

<div class="starter-template">
<h1 th:text="${msg.title}"></h1>

<p class="bg-primary" th:text="${msg.content}"></p>

<div sec:authorize="hasRole('ROLE_HOME')"> <!-- 用户类型为ROLE_ADMIN 显示 -->
<p class="bg-info" th:text="${msg.etraInfo}"></p>
</div>
<div sec:authorize="hasRole('ROLE_ADMIN')"> <!-- 用户类型为ROLE_ADMIN 显示 -->
<p class="bg-info">恭喜您,您有 ROLE_ADMIN 权限 </p>
</div>

<form th:action="@{/logout}" method="post">
<input type="submit" class="btn btn-primary" value="注销"/>
</form>
</div>

</div>

</body>
</html>

5：修改HomeController.java 文件

package com.us.example.controller;

import com.us.example.domain.Msg;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
* Created by yangyibo on 17/1/18.
*/
@Controller
public class HomeController {

@RequestMapping("/")
public String index(Model model){
Msg msg =  new Msg("测试标题","测试内容","欢迎来到HOME页面,您拥有 ROLE_HOME 权限");
model.addAttribute("msg", msg);
return "home";
}
@RequestMapping("/admin")
@ResponseBody
public String hello(){
return "hello admin";
}
}

6.测试检验

启动访问 http://localhost:8080/ 到登录页面

由于数据库的配置 admin 用户拥有 访问 home和admin 页面的权限。
abel 用户只有访问 home 的权限

使用admin 登录



点击 admin 按钮 会反回结果 “hello admin“

使用abel 用户登录 点击 点击 admin 按钮 页面会报403

源码地址：https://github.com/527515025/springBoot

参考资料：

http://www.tuicool.com/articles/jq6fuur#c-23220

http://blog.csdn.net/u012367513/article/details/38866465