SpringBoot集成Spring Security(1)——入门程序

因为项目需要,第一次接触Spring Security,早就听闻Spring Security强大但上手困难,今天学习了一天,翻遍了全网资料,才仅仅出入门道,特整理这篇文章来让后来者少踩一点坑(本文附带实例程序,请放心食用

本篇文章环境:SpringBoot 2.0 + Mybatis + Spring Security 5.0

源码地址:https://github.com/jitwxs/blog_sample


Step1 导入依赖

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>

<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>

Step2 创建数据库

一般权限控制有三层,即:用户<-->角色<-->权限,用户与角色是多对多,角色和权限也是多对多。这里我们先暂时不考虑权限,只考虑用户<-->角色

创建用户表sys_user

CREATE TABLE `sys_user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) NOT NULL,
`password` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

创建权限表sys_role

CREATE TABLE `sys_role` (
`id` int(11) NOT NULL,
`name` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

创建用户-角色表sys_user_role

CREATE TABLE `sys_user_role` (
`user_id` int(11) NOT NULL,
`role_id` int(11) NOT NULL,
PRIMARY KEY (`user_id`,`role_id`),
KEY `fk_role_id` (`role_id`),
CONSTRAINT `fk_role_id` FOREIGN KEY (`role_id`) REFERENCES `sys_role` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
CONSTRAINT `fk_user_id` FOREIGN KEY (`user_id`) REFERENCES `sys_user` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

初始化一下数据:

INSERT INTO `sys_role` VALUES ('1', 'ROLE_ADMIN');
INSERT INTO `sys_role` VALUES ('2', 'ROLE_USER');

INSERT INTO `sys_user` VALUES ('1', 'admin', '123');
INSERT INTO `sys_user` VALUES ('2', 'jitwxs', '123');

INSERT INTO `sys_user_role` VALUES ('1', '1');
INSERT INTO `sys_user_role` VALUES ('2', '2');

博主有话说:

这里的权限格式为ROLE_XXX,是Spring Security规定的,不要乱起名字哦。

Step3 准备页面

因为是示例程序,页面越简单越好,只用于登陆的login.html以及用于登陆成功后的home.html

login.html:

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>登陆</title>
</head>
<body>
<h1>登陆</h1>
<form method="post" action="/login">
<div>
用户名:<input type="text" name="username">
</div>
<div>
密码:<input type="password" name="password">
</div>
<div>
<button type="submit">立即登陆</button>
</div>
</form>
</body>
</html>

博主有话说:

用户的登陆认证是由Spring Security进行处理的,请求路径默认为/login,用户名默认为username,密码默认为password

home.html:

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>登陆成功</h1>
<a href="/admin">检测ROLE_ADMIN角色</a>
<a href="/user">检测ROLE_USER角色</a>
<button onclick="window.location.href='/logout'">退出登录</button>
</body>
</html>

Step4 配置application.properties

在配置文件中配置下数据库连接:

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/security?useUnicode=true&characterEncoding=utf-8&useSSL=true
spring.datasource.username=root
spring.datasource.password=root

#开启Mybatis下划线命名转驼峰命名
mybatis.configuration.map-underscore-to-camel-case=true

Step5 创建实体、Dao、Service和Controller

5.1 实体

(1)SysUser

public class SysUser implements Serializable{
static final long serialVersionUID = 1L;

private Integer id;

private String name;

private String password;

// 省略getter/setter
}

(2)SysRole

public class SysRole implements Serializable {
static final long serialVersionUID = 1L;

private Integer id;

private String name;

// 省略getter/setter
}

(3)SysUserRole

public class SysUserRole implements Serializable {
static final long serialVersionUID = 1L;

private Integer userId;

private Integer roleId;

// 省略getter/setter
}

5.2 Dao

(1)SysUserMapper

@Mapper
public interface SysUserMapper {
@Select("SELECT * FROM sys_user WHERE id = #{id}")
SysUser selectById(Integer id);

@Select("SELECT * FROM sys_user WHERE name = #{name}")
SysUser selectByName(String name);
}

(2)SysRoleMapper

@Mapper
public interface SysRoleMapper {
@Select("SELECT * FROM sys_role WHERE id = #{id}")
SysRole selectById(Integer id);
}

(3)SysUserRoleMapper

@Mapper
public interface SysUserRoleMapper {
@Select("SELECT * FROM sys_user_role WHERE user_id = #{userId}")
List<SysUserRole> listByUserId(Integer userId);
}

5.3 Service

(1)SysUserService

@Service
public class SysUserService {
@Autowired
private SysUserMapper userMapper;

public SysUser selectById(Integer id) {
return userMapper.selectById(id);
}

public SysUser selectByName(String name) {
return userMapper.selectByName(name);
}
}

(2)SysRoleService

@Service
public class SysRoleService {
@Autowired
private SysRoleMapper roleMapper;

public SysRole selectById(Integer id){
return roleMapper.selectById(id);
}
}

(3)SysUserRoleService

@Service
public class SysUserRoleService {
@Autowired
private SysUserRoleMapper userRoleMapper;

public List<SysUserRole> listByUserId(Integer userId) {
return userRoleMapper.listByUserId(userId);
}
}

5.4 Controller

@Controller
public class LoginController {
private Logger logger = LoggerFactory.getLogger(LoginController.class);

@RequestMapping("/")
public String showHome() {
String name = SecurityContextHolder.getContext().getAuthentication().getName();
logger.info("当前登陆用户:" + name);

return "home.html";
}

@RequestMapping("/login")
public String showLogin() {
return "login.html";
}

@RequestMapping("/admin")
@ResponseBody
@PreAuthorize("hasRole('ROLE_ADMIN')")
public String printAdmin() {
return "如果你看见这句话,说明你有ROLE_ADMIN角色";
}

@RequestMapping("/user")
@ResponseBody
@PreAuthorize("hasRole('ROLE_USER')")
public String printUser() {
return "如果你看见这句话,说明你有ROLE_USER角色";
}
}

博主有话说:

  • 如代码所示,获取当前登录用户:SecurityContextHolder.getContext().getAuthentication()
  • @PreAuthorize用于判断用户是否有指定权限,没有就不能访问

Step6 配置SpringSecurity

6.1 UserDetailsService

首先我们需要自定义UserDetailsService,将用户信息和权限注入进来。

我们需要重写loadUserByUsername方法,参数是用户输入的用户名。

返回值是UserDetails,这是一个接口,一般使用它的子类org.springframework.security.core.userdetails.User(当前你也可以自定义个UserDetails),它有三个参数,分别是用户名、密码和权限集。

/**
* 自定义userDetailsService
* @author jitwxs
* @since 2018/5/9 9:36
*/
@Service("userDetailsService")
public class CustomUserDetailsService implements UserDetailsService {
@Autowired
private SysUserService userService;

@Autowired
private SysRoleService roleService;

@Autowired
private SysUserRoleService userRoleService;

@Override
public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
Collection<GrantedAuthority> authorities = new ArrayList<>();
// 从数据库中取出用户信息
SysUser user = userService.selectByName(username);

// 判断用户是否存在
if(user == null) {
throw new UsernameNotFoundException("用户名不存在");
}

// 添加权限
List<SysUserRole> userRoles = userRoleService.listByUserId(user.getId());
for (SysUserRole userRole : userRoles) {
SysRole role = roleService.selectById(userRole.getRoleId());
authorities.add(new SimpleGrantedAuthority(role.getName()));
}

// 返回UserDetails实现类
return new User(user.getName(), user.getPassword(), authorities);
}
}

6.2 WebSecurityConfig

该类是Spring Security的配置类,该类的三个注解分别是标识该类是配置类、开启Security服务、开启全局Securtiy注解。

首先将我们自定义的userDetailsService注入进来,在configure()方法中使用auth.userDetailsService()方法替换默认的userDetailsService。

这里我们还指定了密码的加密方式(Spring Security 5.0强制要求设置),因为我们数据库是明文存储的,所以无需加密,如下所示:

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private CustomUserDetailsService userDetailsService;

@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
auth.userDetailsService(userDetailsService).passwordEncoder(new PasswordEncoder() {
@Override
public String encode(CharSequence charSequence) {
return charSequence.toString();
}

@Override
public boolean matches(CharSequence charSequence, String s) {
return s.equals(charSequence.toString());
}
});
}

@Override
protected void configure(HttpSecurity http) throws Exception {
http.authorizeRequests()
// 如果有允许匿名的url,填在下面
// .antMatchers().permitAll()
.anyRequest().authenticated()
.and()
// 设置登陆页
.formLogin().loginPage("/login")
// 设置登陆成功页
.defaultSuccessUrl("/").permitAll()
// 自定义登陆用户名和密码参数,默认为username和password
// .usernameParameter("username")
// .passwordParameter("password")
.and()
.logout().permitAll();

// 关闭CSRF跨域
http.csrf().disable();
}

@Override
public void configure(WebSecurity web) throws Exception {
// 设置拦截忽略文件夹,可以对静态资源放行
web.ignoring().antMatchers("/css/**", "/js/**");
}
}

Step7 运行程序

运行结果

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