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Security是什么？

是一个安全框架。可以用来做认证和授权

官网：Spring Security

SpringSecurity环境搭建

1、创建一个新的project

2、导入thymeleaf依赖

        <dependency><groupId>org.thymeleaf</groupId><artifactId>thymeleaf-spring5</artifactId></dependency><dependency><groupId>org.thymeleaf.extras</groupId><artifactId>thymeleaf-extras-java8time</artifactId></dependency>

3、导入静态资源：Spring security教程案例素材（狂神说Java之SpringBoot教程集合版）: 狂神SpringBoot教程IDEA版中p34中用到的页面素材，学习Spring security

4、在controller包下，编写RouterController

@Controller
public class RouterController {@RequestMapping({"/","/index","/index.html"})public String index(){return "index";}@RequestMapping("/toLogin")public String toLogin(){return "views/login";}@RequestMapping("/level1/{id}")public String level1(@PathVariable("id") int id){return "views/level1/"+id;}@RequestMapping("/level2/{id}")public String level2(@PathVariable("id") int id){return "views/level2/"+id;}@RequestMapping("/level3/{id}")public String level3(@PathVariable("id") int id){return "views/level3/"+id;}
}

5、显示结果
首页：

 登录页：

用户认证和授权 

1、导入security的starter

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

2、在config包下，编写一个类去继承WebSecurityConfigurerAdapter，并且加上注解@EnableWebSecurity

@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {//授权@Overrideprotected void configure(HttpSecurity http) throws Exception {//请求授权的规则http.authorizeHttpRequests()//首页所有人都可以访问，功能页只有对应权限的人才可以访问.antMatchers("/").permitAll().antMatchers("/level1/**").hasRole("vip1").antMatchers("/level2/**").hasRole("vip2").antMatchers("/level3/**").hasRole("vip3");//没有权限默认会到登录页面，需要开启登录的页面http.formLogin();}//认证@Overrideprotected void configure(AuthenticationManagerBuilder auth) throws Exception {//这些数据正常应该从数据库中读auth.inMemoryAuthentication().passwordEncoder(new BCryptPasswordEncoder()).withUser("qiu").password(new BCryptPasswordEncoder().encode("123456")).roles("vip1","vip2").and().withUser("root").password(new BCryptPasswordEncoder().encode("123456")).roles("vip1","vip2","vip3").and().withUser("guest").password(new BCryptPasswordEncoder().encode("123456")).roles("vip3");}
}

注销

        //开启注销功能，注销成功之后跳到首页http.logout().logoutSuccessUrl("/");

 

记住我

前端：

<input type="checkbox" name="remember">记住我

后端： 

        //开启记住我功能，自定义接受前端传过来的参数http.rememberMe().rememberMeParameter("remember");

原理是保存了一个cookie和一个session，默认保存14天

定制登录页

http.formLogin().loginPage("/toLogin");