11.springsecurity权限管理

登录认证

1.首先开启登录认证，对static下的静态资源css、js、img、plugins全部放行

2.但是访问/admin/**下资源的需要开启实时的权限认证，会调用authService下的auth函数

3.antMatchers("/pages/**").authenticated()代表对pages下的资源，如果已经通过了权限认证，就可以访问

SecurityConfig：

package com.example.admin.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;


@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    //使用BCrypt加密策略
    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder() {
        return new BCryptPasswordEncoder();
    }

    public static void main(String[] args)
    {
        //加密策略 MD5 不安全 彩虹表  MD5 加盐
        String mszlu = new BCryptPasswordEncoder().encode("mszlu");
    }

    @Override
    public void configure(WebSecurity web) throws Exception
    {
        super.configure(web);
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception
    {
        //开启登录认证
        http.authorizeRequests()
                .antMatchers("/css/**").permitAll()
                .antMatchers("/img/**").permitAll()
                .antMatchers("/js/**").permitAll()
                .antMatchers("/plugins/**").permitAll()

                .antMatchers("/admin/**").access("@authService.auth(request,authentication)") //自定义service实现实时的权限认证
                .antMatchers("/pages/**").authenticated();

        //没有权限，会自动跳到登陆页,需要开启登录的页面
        http.formLogin()
                .loginPage("/login.html") //自定义的登录页面
                .loginProcessingUrl("/login") //登录处理接口
                .usernameParameter("username") //定义登录时的用户名的key 默认为username
                .passwordParameter("password") //定义登录时的密码key，默认是password

                .defaultSuccessUrl("/pages/main.html") //登录成功跳转的页面
                .failureUrl("/login.html") //登录失败跳转的页面
                .permitAll(); //和登录表单相关的接口/login通过

        //退出登录配置
        http.logout()
                .logoutUrl("/logout") //退出登录接口
                .logoutSuccessUrl("/login.html") //退出登录成功跳转的页面
                .permitAll(); //退出登录的接口放行

        http.httpBasic()
            .and()
            .csrf().disable() //csrf关闭 如果自定义登录 需要关闭
            .headers().frameOptions().sameOrigin();//支持iframe嵌套
    }
}

SecurityUserService：

登录的时候，会把username传递到这里

通过username查询admin,如果存在，将密码告诉springSecurity

如果不存在 返回Null,代表认证失败

package com.example.admin.service;

import com.example.admin.pojo.Admin;
import org.springframework.beans.factory.annotation.Autowired;
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;

@Service
public class SecurityUserService implements UserDetailsService
{
    @Autowired
    private AdminService adminService;
    //登录的时候，会把username传递到这里
    //通过username查询admin,如果存在，将密码告诉springSecurity
    //如果不存在 返回Null,代表认证失败
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException
    {
        Admin admin = adminService.findAdminByUsername(username);
        if(admin == null)
        {
            //登录失败
            return null;
        }
        UserDetails userDetails = new User(username,admin.getPassword(),new ArrayList<>());
        return userDetails;
    }
}

AuthService：

自定义service 来去实现实时的权限认证

package com.example.admin.service;
import com.example.admin.pojo.Admin;
import com.example.admin.pojo.Permission;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.stereotype.Service;
import org.thymeleaf.util.StringUtils;

import javax.servlet.http.HttpServletRequest;
import java.util.List;
//自定义service 来去实现实时的权限认证
@Service
public class AuthService
{
    @Autowired
    private AdminService adminService;

    //权限认证
    public boolean auth(HttpServletRequest request, Authentication authentication)
    {
        //请求路径
        String requestURI = request.getRequestURI();
        //匿名用户
        Object principal = authentication.getPrincipal();
        if(principal == null || "anonymousUser".equals(principal))
        {
            //未登录
            return false;
        }
        UserDetails userDetails = (UserDetails) principal;
        String username = userDetails.getUsername();
        Admin admin = adminService.findAdminByUsername(username);
        if(admin == null)
        {
            return false;
        }
        //最高权限者
        if(admin.getId() == 1)
        {
            return true;
        }
        Long id = admin.getId();
        List permissionList = adminService.findPermissionByAdminId(id);

        //requestURI可能有?后面的参数传参，所以要分割一下
        requestURI = StringUtils.split(requestURI, "?")[0];
        for (Permission permission : permissionList)
        {
            //判断该用户有没有这个请求路径的权限
            if(requestURI.equals(permission.getPath()))
            {
                return true;
            }
        }
        return false;
    }
}