SpringSecurity用户认证和授权Demo

SpringSecurity解决两件事情：用户认证（谁可以登陆）、用户授权（他可以干啥）
springboot+springsecurity+thymeleaf+springdatajpa+mysql

用户信息保存在mysql数据库所以需要MySQL驱动，持久化选择spring-data-jpa，从内存认证可以不用考虑持久化这一块

版本信息在pom文件可见，springboot版本过高会出现奇奇怪怪的问题
pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0modelVersion>
    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.0.9.RELEASEversion>
        <relativePath/> 
    parent>
    <groupId>com.dandangroupId>
    <artifactId>springboot-06-securityartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <name>springboot-06-securityname>
    <description>Demo project for Spring Bootdescription>

    <properties>
        <java.version>1.8java.version>
    properties>

    <dependencies>
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
            <version>1.16.20version>
            <scope>providedscope>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-data-jpaartifactId>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-securityartifactId>
        dependency>
        <dependency>
            <groupId>org.thymeleaf.extrasgroupId>
            <artifactId>thymeleaf-extras-springsecurity4artifactId>
            <version>3.0.4.RELEASEversion>
        dependency>
        <dependency>
            <groupId>org.thymeleafgroupId>
            <artifactId>thymeleaf-spring5artifactId>
        dependency>
        <dependency>
            <groupId>org.thymeleaf.extrasgroupId>
            <artifactId>thymeleaf-extras-java8timeartifactId>
        dependency>

        <dependency>
            <groupId>org.springframework.securitygroupId>
            <artifactId>spring-security-configartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.securitygroupId>
            <artifactId>spring-security-webartifactId>
        dependency>
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <scope>runtimescope>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintagegroupId>
                    <artifactId>junit-vintage-engineartifactId>
                exclusion>
            exclusions>
        dependency>
    dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
            plugin>
        plugins>
    build>

project>

user实体类，这个表结构假装一个用户只有一个角色，否则应该有用户表、角色表、用户角色中间表，这样写只是为了简单

package com.dandan.entity;

import lombok.Data;

import javax.persistence.*;

@Data
@Table(name = "user")
@Entity
public class UserEntity {
    @Id   // 表明id
    @GeneratedValue
    String id;
    @Column(name = "user_name")
    String username;
    @Column(name = "user_password")
    String password;
    @Column(name = "roles")
    String roles;
}

userDao

package com.dandan.dao;

import com.dandan.entity.UserEntity;
import org.springframework.data.jpa.repository.JpaRepository;

public interface UserDao extends JpaRepository<UserEntity,String> {
    UserEntity  findByUsername(String username);

}

实现UserDetailsService接口并overried loadUserByUsername类，返回userdetails.User 用来交给security做授权
userService

package com.dandan.service;

import com.dandan.dao.UserDao;
import com.dandan.entity.UserEntity;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
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;
@Service
public class UserService implements UserDetailsService {
    @Autowired
    private UserDao userDao;
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        try {
            UserEntity user = userDao.findByUsername(username);
            if (user == null) {
                throw new UsernameNotFoundException("用户名不存在");
            }
            //用户权限
            List<SimpleGrantedAuthority> authorities = new ArrayList<>();
            if (null != user.getRoles() && !user.getRoles().isEmpty()) {
                String[] roles = user.getRoles().split(",");
                for (String role : roles) {
                    if (null != role && !role.isEmpty()) {
                        authorities.add(new SimpleGrantedAuthority(role.trim()));
                    }
                }
            }
            return new org.springframework.security.core.userdetails.User(user.getUsername(), user.getPassword(), authorities);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}

写个controller用来跳路由，

package com.dandan.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class RouterController {
	
	//登陆页面
    @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;
    }
}

SpringSecurity配置类，继承WebSecurityConfigurerAdapter，开启WebSecurity（@EnableWebSecurity）

package com.dandan.config;

import com.dandan.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
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.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    private UserService userService;

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        //首页所有人都可以访问
        //其他页面需要对应角色
        http.authorizeRequests()
                .antMatchers("/").permitAll()
                .antMatchers("/level1/**").hasRole("vip1")
                .antMatchers("/level2/**").hasRole("vip2");

        //没有权限重定向到登陆页面
        http.formLogin().loginPage("/toLogin");

        //关闭scrf（才可以使用get登出）
        http.csrf().disable();

        //开启注销功能
        //后跳到首页
        http.logout().logoutSuccessUrl("/");

        //开启记住我功能,session和cookie实现，默认两周时间
        http.rememberMe().rememberMeParameter("rememberme");

    }

    //springboot2.0.x可以直接使用，再高版本需要passwordEncoder，对应的数据库存用户密码的时候应该加密过
    //There is no PasswordEncoder mapped for the id "null"
    //在spring security5.0+新增了很多加密方法
    @Override
    public void configure(AuthenticationManagerBuilder auth) throws Exception {
        //从内存，使用这个认证方式，就不用啥啥service、dao、mysql
//        auth.inMemoryAuthentication().passwordEncoder(new BCryptPasswordEncoder())
//                .withUser("dandan").password(new BCryptPasswordEncoder().encode("123456")).roles("vip2")
//                .and()
//                .withUser("root").password(new BCryptPasswordEncoder().encode("123456")).roles("vip1", "vip2");
        //从自定义service，编码方式bcrypt，
        //不写encoder在比较新的springboot种会报错There is no PasswordEncoder mapped for the id "null"，
        //同样的数据库种存储的用户密码要用同种方式加密
        auth.userDetailsService(userService).passwordEncoder(new BCryptPasswordEncoder());
    }
}

注意：使用userService这种方式，需要在角色前加上ROEL_，不然授权不到。
结果：使用dandan用户登陆成功，并可以访问http://localhost:8080/level1/1

试图访问
http://localhost:8080/level2/1

项目已经集成thymeleaf，配合前端可以实现对相应角色显示相应内容（后端狗 不会写thymeleaf，抄的页面就不写出来了）