谷粒学院Spring-security

一、Spring Security介绍

1、框架介绍

Spring 是一个非常流行和成功的 Java 应用开发框架。Spring Security 基于 Spring 框架，提供了一套

Web 应用安全性的完整解决方案。一般来说，Web 应用的安全性包括用户认证（Authentication）和用

户授权（Authorization）两个部分。

（1）用户认证指的是：验证某个用户是否为系统中的合法主体，也就是说用户能否访问该系统。用户认

证一般要求用户提供用户名和密码。系统通过校验用户名和密码来完成认证过程。

（2）用户授权指的是验证某个用户是否有权限执行某个操作。在一个系统中，不同用户所具有的权限是

不同的。比如对一个文件来说，有的用户只能进行读取，而有的用户可以进行修改。一般来说，系统会

为不同的用户分配不同的角色，而每个角色则对应一系列的权限。

  • Spring Security其实就是用filter，多请求的路径进行过滤。

（1）如果是基于Session，那么Spring-security会对cookie里的sessionid进行解析，找到服务器存储

的sesion信息，然后判断当前用户是否符合请求的要求。

（2）如果是token，则是解析出token，然后将当前请求加入到Spring-security管理的权限信息中去

即 上述session方式和token方式中的取值和放值都交给Spring-security去做了

2、认证与授权实现思路

认证与授权实现思路 即：Spring-security原理（）B站P272 第13分

如果系统的模块众多，每个模块都需要就行授权与认证，所以我们选择基于token的形式进行授权与认

证，用户根据用户名密码认证成功，然后获取当前用户角色的一系列权限值，并以用户名为key，权限列

表为value的形式存入redis缓存中，根据用户名相关信息生成token返回，浏览器将token记录到cookie中，

每次调用api接口都默认将token携带到header请求头中，Spring-security解析header头获取token信息，解

析token获取当前用户名，根据用户名就可以从redis中获取权限列表，这样Spring-security就能够判断当前

请求是否有权限访问

二、整合Spring Security

1、在common下创建spring_security模块

2、在spring_security引入相关依赖

    
        
            com.atguigu
            common_utils
            0.0.1-SNAPSHOT
        
        
        
            org.springframework.boot
            spring-boot-starter-security
        

        
            io.jsonwebtoken
            jjwt

3、代码结构说明：

ps： 以上类名是随便起的名字（只是部分具体代码需要继承spring-security的接口）

具体代码如下（注意导包勿错）

TokenWebSecurityConfig 核心配置类
package com.atguigu.serurity.config;

import com.atguigu.serurity.filter.TokenAuthenticationFilter;
import com.atguigu.serurity.filter.TokenLoginFilter;
import com.atguigu.serurity.security.DefaultPasswordEncoder;
import com.atguigu.serurity.security.TokenLogoutHandler;
import com.atguigu.serurity.security.TokenManager;
import com.atguigu.serurity.security.UnauthorizedEntryPoint;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
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.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;

/**
 * 

 * Security配置类
 * 

 *
 * @author qy
 * @since 2019-11-18
 */
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true) // 开启权限控制注解
public class TokenWebSecurityConfig extends WebSecurityConfigurerAdapter {

    private UserDetailsService userDetailsService;// 自己写的类，参考‘认证与授权实现思路’这里的图解。功能是从数据库查询用户信息，然后我们只要将返回的用户数据信息交给spring-security即可
    private TokenManager tokenManager;// 生成token使用
    private DefaultPasswordEncoder defaultPasswordEncoder;// 密码处理
    private RedisTemplate redisTemplate;

    @Autowired        // 使用构造注入到容器中
    public TokenWebSecurityConfig(UserDetailsService userDetailsService, DefaultPasswordEncoder defaultPasswordEncoder,
                                  TokenManager tokenManager, RedisTemplate redisTemplate) {
        this.userDetailsService = userDetailsService;
        this.defaultPasswordEncoder = defaultPasswordEncoder;
        this.tokenManager = tokenManager;
        this.redisTemplate = redisTemplate;
    }

    /**
     * 核心配置设置
     * @param http
     * @throws Exception
     */
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.exceptionHandling()
                .authenticationEntryPoint(new UnauthorizedEntryPoint())
                .and().csrf().disable()
                .authorizeRequests()
                .anyRequest().authenticated()
                .and().logout().logoutUrl("/admin/acl/index/logout")// 只需要写这个退出地址，然后由spring-security自动进行退出
                .addLogoutHandler(new TokenLogoutHandler(tokenManager,redisTemplate)).and()
                .addFilter(new TokenLoginFilter(authenticationManager(), tokenManager, redisTemplate))
                .addFilter(new TokenAuthenticationFilter(authenticationManager(), tokenManager, redisTemplate)).httpBasic();
    }

    /**
     * 密码处理
     * @param auth
     * @throws Exception
     */
    @Override
    public void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService).passwordEncoder(defaultPasswordEncoder);
    }

    /**
     * 配置哪些请求不拦截（不进行权限控制）
     * @param web
     * @throws Exception
     */
    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers("/api/**",
                "/swagger-resources/**", "/webjars/**", "/v2/**", "/swagger-ui.html/**"
               );
    }
}
实体类 SecurityUser 和User
package com.atguigu.serurity.entity;

import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.util.StringUtils;

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

/**
 * 

 * 安全认证用户详情信息
 * 

 *
 * @author qy
 * @since 2019-11-08
 */
@Data
@Slf4j
public class SecurityUser implements UserDetails {

    //当前登录用户
    private transient User currentUserInfo;

    //当前权限
    private List permissionValueList;

    public SecurityUser() {
    }

    public SecurityUser(User user) {
        if (user != null) {
            this.currentUserInfo = user;
        }
    }

    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
        Collection authorities = new ArrayList<>();
        for(String permissionValue : permissionValueList) {
            if(StringUtils.isEmpty(permissionValue)) continue;
            SimpleGrantedAuthority authority = new SimpleGrantedAuthority(permissionValue);
            authorities.add(authority);
        }

        return authorities;
    }

    @Override
    public String getPassword() {
        return currentUserInfo.getPassword();
    }

    @Override
    public String getUsername() {
        return currentUserInfo.getUsername();
    }

    @Override
    public boolean isAccountNonExpired() {
        return true;
    }

    @Override
    public boolean isAccountNonLocked() {
        return true;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        return true;
    }

    @Override
    public boolean isEnabled() {
        return true;
    }
}

  • 由于上面这个类需要下边这个类，所以建立类如下

    package com.atguigu.serurity.entity;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

import java.io.Serializable;

/**
 * 
    
 * 用户实体类
 * 
    
 *
 * @author qy
 * @since 2019-11-08
 */
@Data
@ApiModel(description = "用户实体类")
public class User implements Serializable {

	private static final long serialVersionUID = 1L;

	@ApiModelProperty(value = "微信openid")
	private String username;

	@ApiModelProperty(value = "密码")
	private String password;

	@ApiModelProperty(value = "昵称")
	private String nickName;

	@ApiModelProperty(value = "用户头像")
	private String salt;

	@ApiModelProperty(value = "用户签名")
	private String token;

}

上述类是是固定写法（spring-security要求的）

TokenAuthenticationFilter 授权过滤类
package com.atguigu.serurity.filter;

import com.atguigu.commonutils.R;
import com.atguigu.commonutils.ResponseUtil;
import com.atguigu.serurity.security.TokenManager;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.web.authentication.www.BasicAuthenticationFilter;
import org.springframework.util.StringUtils;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

/**
 * 

 * 访问过滤器（授权过滤器）
 * 

 *
 * @author qy
 * @since 2019-11-08
 */
public class TokenAuthenticationFilter extends BasicAuthenticationFilter {
    private TokenManager tokenManager;
    private RedisTemplate redisTemplate;

    public TokenAuthenticationFilter(AuthenticationManager authManager, TokenManager tokenManager,RedisTemplate redisTemplate) {
        super(authManager);
        this.tokenManager = tokenManager;
        this.redisTemplate = redisTemplate;
    }

    @Override
    protected void doFilterInternal(HttpServletRequest req, HttpServletResponse res, FilterChain chain)
            throws IOException, ServletException {
        logger.info("================="+req.getRequestURI());
        if(req.getRequestURI().indexOf("admin") == -1) {
            chain.doFilter(req, res);
            return;
        }

        UsernamePasswordAuthenticationToken authentication = null;
        try {
            authentication = getAuthentication(req);
        } catch (Exception e) {
            ResponseUtil.out(res, R.error());
        }

        if (authentication != null) {
            SecurityContextHolder.getContext().setAuthentication(authentication);
        } else {
            ResponseUtil.out(res, R.error());
        }
        chain.doFilter(req, res);
    }

    private UsernamePasswordAuthenticationToken getAuthentication(HttpServletRequest request) {
        // token置于header里，所以先取到
        String token = request.getHeader("token");
        if (token != null && !"".equals(token.trim())) {
            String userName = tokenManager.getUserFromToken(token);

            // 判断此登录用户有没有操作这些菜单的权限（即为流程图示第6步：由spring-security给当前用户赋予权限，可以进行相应操作）
            List permissionValueList = (List) redisTemplate.opsForValue().get(userName);
            Collection authorities = new ArrayList<>();
            for(String permissionValue : permissionValueList) {
                if(StringUtils.isEmpty(permissionValue)) continue;
                SimpleGrantedAuthority authority = new SimpleGrantedAuthority(permissionValue);
                authorities.add(authority);
            }

            if (!StringUtils.isEmpty(userName)) {
                return new UsernamePasswordAuthenticationToken(userName, token, authorities);
            }
            return null;
        }
        return null;
    }
}
TokenLoginFilter 认证过滤器类（登录类）（先认证（登录）成功再授权）
package com.atguigu.serurity.filter;

import com.atguigu.commonutils.R;
import com.atguigu.commonutils.ResponseUtil;
import com.atguigu.serurity.entity.SecurityUser;
import com.atguigu.serurity.entity.User;
import com.atguigu.serurity.security.TokenManager;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;

/**
 * 

 * 登录过滤器，继承UsernamePasswordAuthenticationFilter，对用户名密码进行登录校验
 * 

 *
 * @author qy
 * @since 2019-11-08
 */
public class TokenLoginFilter extends UsernamePasswordAuthenticationFilter {

    private AuthenticationManager authenticationManager;
    private TokenManager tokenManager;
    private RedisTemplate redisTemplate;

    public TokenLoginFilter(AuthenticationManager authenticationManager, TokenManager tokenManager, RedisTemplate redisTemplate) {
        this.authenticationManager = authenticationManager;
        this.tokenManager = tokenManager;
        this.redisTemplate = redisTemplate;
        this.setPostOnly(false);
        // 设置当前登录请求的地址，这个地址是随便写的，因为登录是由security帮我们做的，我们只需要写查询数据库的过程就可以做到
        this.setRequiresAuthenticationRequestMatcher(new AntPathRequestMatcher("/admin/acl/login","POST"));
    }

    /**
     * 得到用户名和密码进行验证
     * @param req
     * @param res
     * @return
     * @throws AuthenticationException
     */
    @Override
    public Authentication attemptAuthentication(HttpServletRequest req, HttpServletResponse res)
            throws AuthenticationException {
        try {
            User user = new ObjectMapper().readValue(req.getInputStream(), User.class);

            return authenticationManager.authenticate(new UsernamePasswordAuthenticationToken(user.getUsername(), user.getPassword(), new ArrayList<>()));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }

    /**
     * 登录成功执行这个方法
     * @param req
     * @param res
     * @param chain
     * @param auth
     * @throws IOException
     * @throws ServletException
     */
    @Override
    protected void successfulAuthentication(HttpServletRequest req, HttpServletResponse res, FilterChain chain,
                                            Authentication auth) throws IOException, ServletException {
        SecurityUser user = (SecurityUser) auth.getPrincipal();
        String token = tokenManager.createToken(user.getCurrentUserInfo().getUsername());
        // 登录成功之后把数据放入redis中
        redisTemplate.opsForValue().set(user.getCurrentUserInfo().getUsername(), user.getPermissionValueList());

        ResponseUtil.out(res, R.ok().data("token", token));
    }

    /**
     * 登录失败执行这个方法
     * @param request
     * @param response
     * @param e
     * @throws IOException
     * @throws ServletException
     */
    @Override
    protected void unsuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response,
                                              AuthenticationException e) throws IOException, ServletException {
        ResponseUtil.out(response, R.error());
    }
}
以及如下放在security包里面的四个工具类和2个放值common里的两个工具类
package com.atguigu.serurity.security;

import com.atguigu.commonutils.MD5;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.stereotype.Component;

/**
 * 

 * t密码的处理方法类型
 * 

 *
 * @author qy
 * @since 2019-11-08
 */
@Component
public class DefaultPasswordEncoder implements PasswordEncoder {

    public DefaultPasswordEncoder() {
        this(-1);
    }

    /**
     * @param strength
     *            the log rounds to use, between 4 and 31
     */
    public DefaultPasswordEncoder(int strength) {

    }

    public String encode(CharSequence rawPassword) {
        return MD5.encrypt(rawPassword.toString());
    }

    public boolean matches(CharSequence rawPassword, String encodedPassword) {
        return encodedPassword.equals(MD5.encrypt(rawPassword.toString()));
    }
}

package com.atguigu.serurity.security;

import com.atguigu.commonutils.R;
import com.atguigu.commonutils.ResponseUtil;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.Authentication;
import org.springframework.security.web.authentication.logout.LogoutHandler;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 

 * 登出业务逻辑类
 * 

 *
 * @author qy
 * @since 2019-11-08
 */
public class TokenLogoutHandler implements LogoutHandler {

    private TokenManager tokenManager;
    private RedisTemplate redisTemplate;

    public TokenLogoutHandler(TokenManager tokenManager, RedisTemplate redisTemplate) {
        this.tokenManager = tokenManager;
        this.redisTemplate = redisTemplate;
    }

    @Override
    public void logout(HttpServletRequest request, HttpServletResponse response, Authentication authentication) {
        String token = request.getHeader("token");
        if (token != null) {
            tokenManager.removeToken(token);

            //清空当前用户缓存中的权限数据
            String userName = tokenManager.getUserFromToken(token);
            redisTemplate.delete(userName);
        }
        ResponseUtil.out(response, R.ok());
    }

}

package com.atguigu.serurity.security;

import io.jsonwebtoken.CompressionCodecs;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.springframework.stereotype.Component;

import java.util.Date;

/**
 * 

 * token管理
 * 

 *
 * @author qy
 * @since 2019-11-08
 */
@Component
public class TokenManager {

    private long tokenExpiration = 24*60*60*1000;
    private String tokenSignKey = "123456";

    public String createToken(String username) {
        String token = Jwts.builder().setSubject(username)
                .setExpiration(new Date(System.currentTimeMillis() + tokenExpiration))
                .signWith(SignatureAlgorithm.HS512, tokenSignKey).compressWith(CompressionCodecs.GZIP).compact();
        return token;
    }

    public String getUserFromToken(String token) {
        String user = Jwts.parser().setSigningKey(tokenSignKey).parseClaimsJws(token).getBody().getSubject();
        return user;
    }

    public void removeToken(String token) {
        //jwttoken无需删除，客户端扔掉即可。
    }

}


package com.atguigu.serurity.security;

import com.atguigu.commonutils.R;
import com.atguigu.commonutils.ResponseUtil;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.AuthenticationEntryPoint;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 

 * 未授权的统一处理方式
 * 

 *
 * @author qy
 * @since 2019-11-08
 */
public class UnauthorizedEntryPoint implements AuthenticationEntryPoint {

    @Override
    public void commence(HttpServletRequest request, HttpServletResponse response,
                         AuthenticationException authException) throws IOException, ServletException {

        ResponseUtil.out(response, R.error());
    }
}

common里的2个如下

package com.atguigu.commonutils;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


public final class MD5 {

    public static String encrypt(String strSrc) {
        try {
            char hexChars[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8',
                    '9', 'a', 'b', 'c', 'd', 'e', 'f' };
            byte[] bytes = strSrc.getBytes();
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(bytes);
            bytes = md.digest();
            int j = bytes.length;
            char[] chars = new char[j * 2];
            int k = 0;
            for (int i = 0; i < bytes.length; i++) {
                byte b = bytes[i];
                chars[k++] = hexChars[b >>> 4 & 0xf];
                chars[k++] = hexChars[b & 0xf];
            }
            return new String(chars);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            throw new RuntimeException("MD5加密出错！！+" + e);
        }
    }

    public static void main(String[] args) {
        System.out.println(MD5.encrypt("111111"));
    }

}


package com.atguigu.commonutils;

import com.atguigu.commonutils.R;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class ResponseUtil {

    public static void out(HttpServletResponse response, R r) {
        ObjectMapper mapper = new ObjectMapper();
        response.setStatus(HttpStatus.OK.value());
        response.setContentType(MediaType.APPLICATION_JSON_UTF8_VALUE);
        try {
            mapper.writeValue(response.getWriter(), r);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

此外JwtUtils工具类备用

package com.atguigu.commonutils;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jws;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.util.StringUtils;

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

/**
 * @author helen
 * @since 2019/10/16
 */
public class JwtUtils {

    //常量
    public static final long EXPIRE = 1000 * 60 * 60 * 24; //token过期时间
    public static final String APP_SECRET = "ukc8BDbRigUDaY6pZFfWus2jZWLPHO"; //秘钥

    //生成token字符串的方法
    public static String getJwtToken(String id, String nickname){

        String JwtToken = Jwts.builder()
                .setHeaderParam("typ", "JWT")
                .setHeaderParam("alg", "HS256")

                .setSubject("guli-user")
                .setIssuedAt(new Date())
                .setExpiration(new Date(System.currentTimeMillis() + EXPIRE))

                .claim("id", id)  //设置token主体部分 ，存储用户信息
                .claim("nickname", nickname)

                .signWith(SignatureAlgorithm.HS256, APP_SECRET)
                .compact();

        return JwtToken;
    }

    /**
     * 判断token是否存在与有效
     * @param jwtToken
     * @return
     */
    public static boolean checkToken(String jwtToken) {
        if(StringUtils.isEmpty(jwtToken)) return false;
        try {
            Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    /**
     * 判断token是否存在与有效
     * @param request
     * @return
     */
    public static boolean checkToken(HttpServletRequest request) {
        try {
            String jwtToken = request.getHeader("token");
            if(StringUtils.isEmpty(jwtToken)) return false;
            Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    /**
     * 根据token字符串获取会员id
     * @param request
     * @return
     */
    public static String getMemberIdByJwtToken(HttpServletRequest request) {
        String jwtToken = request.getHeader("token");
        if(StringUtils.isEmpty(jwtToken)) return "";
        Jws claimsJws = Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
        Claims claims = claimsJws.getBody();
        return (String)claims.get("id");
    }
}

4、面向框架接口开发思想，写一个自己的类实现框架接口，执行自己的业务逻辑

5、

5.1、创建自定义查询用户类

（1）在service_acl模块创建，因为其他模板不会用到

UserDetailsServiceImpl 认证用户详情类
在这个类中执行用户查询逻辑并将用户信息返回（securityUser）
package com.atguigu.aclservice.service.impl;

import com.atguigu.aclservice.entity.User;
import com.atguigu.aclservice.service.PermissionService;
import com.atguigu.aclservice.service.UserService;
import com.atguigu.serurity.entity.SecurityUser;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
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.List;


/**
 * 

 * 自定义userDetailsService - 认证用户详情
 * 

 *
 * @author qy
 * @since 2019-11-08
 */
@Service("userDetailsService")
public class UserDetailsServiceImpl implements UserDetailsService {

    @Autowired
    private UserService userService;

    @Autowired
    private PermissionService permissionService;

    /***
     * 根据账号获取用户信息
     * @param username:
     * @return: org.springframework.security.core.userdetails.UserDetails
     */
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        // 从数据库中取出用户信息
        User user = userService.selectByUsername(username);

        // 判断用户是否存在
        if (null == user){
            //throw new UsernameNotFoundException("用户名不存在！");
        }
        // 返回UserDetails实现类
        com.atguigu.serurity.entity.User curUser = new com.atguigu.serurity.entity.User();
        BeanUtils.copyProperties(user,curUser);

        List authorities = permissionService.selectPermissionValueByUserId(user.getId());
        SecurityUser securityUser = new SecurityUser(curUser);
        securityUser.setPermissionValueList(authorities);
        return securityUser;
    }

}

。。。。。。略

三、前端整合

略

四、security执行过程（debug）P276

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