15.Spring Security结果JWT实现用户认证

1.demo-admin模块引入依赖

        <!-- spring security -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <!-- jwt -->
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>0.9.1</version>
        </dependency>

2.编写Spring Security认证配置类

package com.lvxk.demo.admin.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
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.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.authentication.logout.HttpStatusReturningLogoutSuccessHandler;


/**
 * WebSecurityConfig
 * Description: <br/>
 * date: 2020/5/5 15:36<br/>
 *
 * @author lvxk<br />
 * @since JDK 1.8
 */
@Configuration
@EnableWebSecurity  // 开启Spring Security
@EnableGlobalMethodSecurity(prePostEnabled = true)  // 开启权限注解，如：@PreAuthorize注解
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private UserDetailsService userDetailsService;

    @Override
    public void configure(AuthenticationManagerBuilder auth) throws Exception {
        // 使用自定义身份验证组件
        auth.authenticationProvider(new JwtAuthenticationProvider(userDetailsService));
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        // 禁用 csrf, 由于使用的是JWT，我们这里不需要csrf
        http.cors().and().csrf().disable()
                .authorizeRequests()
                // 跨域预检请求
                .antMatchers(HttpMethod.OPTIONS, "/**").permitAll()
                // web jars
                .antMatchers("/webjars/**").permitAll()
                // 查看SQL监控（druid）
                .antMatchers("/druid/**").permitAll()
                // 首页和登录页面
                .antMatchers("/").permitAll()
                .antMatchers("/login").permitAll()
                // swagger
                .antMatchers("/swagger-ui.html").permitAll()
                .antMatchers("/swagger-resources/**").permitAll()
                .antMatchers("/v2/api-docs").permitAll()
                .antMatchers("/webjars/springfox-swagger-ui/**").permitAll()
                // 验证码
                .antMatchers("/captcha/**").permitAll()
                // 服务监控
                .antMatchers("/actuator/**").permitAll()
                // 其他所有请求需要身份认证
                .anyRequest().authenticated();
        // 退出登录处理器
        http.logout().logoutSuccessHandler(new HttpStatusReturningLogoutSuccessHandler());
        // token验证过滤器
        http.addFilterBefore(new JwtAuthenticationFilter(authenticationManager()), UsernamePasswordAuthenticationFilter.class);
    }

    @Bean
    @Override
    public AuthenticationManager authenticationManager() throws Exception {
        return super.authenticationManager();
    }
}

3.新建security包,编写登录认证过滤器

package com.lvxk.demo.admin.security;
import java.io.IOException;

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

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.web.authentication.www.BasicAuthenticationFilter;


/**
 * JwtAuthenticationFilter
 * Description: <br/>
 * date: 2020/5/5 15:39<br/>
 *
 * @author lvxk<br />
 * @since JDK 1.8
 */
public class JwtAuthenticationFilter extends BasicAuthenticationFilter {


    @Autowired
    public JwtAuthenticationFilter(AuthenticationManager authenticationManager) {
        super(authenticationManager);
    }

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException {
        // 获取token, 并检查登录状态
        SecurityUtils.checkAuthentication(request);
        chain.doFilter(request, response);
    }

}

4.创建util包和SecurityUtils

package com.lvxk.demo.admin.util;

import javax.servlet.http.HttpServletRequest;

import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;

/**
 * SecurityUtils
 * Description: <br/>
 * date: 2020/5/5 15:42<br/>
 *
 * @author lvxk<br />
 * @since JDK 1.8
 */
public class SecurityUtils {
    /**
     * 系统登录认证
     * @param request
     * @param username
     * @param password
     * @param authenticationManager
     * @return
     */
    public static JwtAuthenticatioToken login(HttpServletRequest request, String username, String password, AuthenticationManager authenticationManager) {
        JwtAuthenticatioToken token = new JwtAuthenticatioToken(username, password);
        token.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
        // 执行登录认证过程
        Authentication authentication = authenticationManager.authenticate(token);
        // 认证成功存储认证信息到上下文
        SecurityContextHolder.getContext().setAuthentication(authentication);
        // 生成令牌并返回给客户端
        token.setToken(JwtTokenUtils.generateToken(authentication));
        return token;
    }

    /**
     * 获取令牌进行认证
     * @param request
     */
    public static void checkAuthentication(HttpServletRequest request) {
        // 获取令牌并根据令牌获取登录认证信息
        Authentication authentication = JwtTokenUtils.getAuthenticationeFromToken(request);
        // 设置登录认证信息到上下文
        SecurityContextHolder.getContext().setAuthentication(authentication);
    }

    /**
     * 获取当前用户名
     * @return
     */
    public static String getUsername() {
        String username = null;
        Authentication authentication = getAuthentication();
        if(authentication != null) {
            Object principal = authentication.getPrincipal();
            if(principal != null && principal instanceof UserDetails) {
                username = ((UserDetails) principal).getUsername();
            }
        }
        return username;
    }

    /**
     * 获取用户名
     * @return
     */
    public static String getUsername(Authentication authentication) {
        String username = null;
        if(authentication != null) {
            Object principal = authentication.getPrincipal();
            if(principal != null && principal instanceof UserDetails) {
                username = ((UserDetails) principal).getUsername();
            }
        }
        return username;
    }

    /**
     * 获取当前登录信息
     * @return
     */
    public static Authentication getAuthentication() {
        if(SecurityContextHolder.getContext() == null) {
            return null;
        }
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        return authentication;
    }

}

5.JwtTokenUtils

package com.lvxk.demo.admin.util;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

/**
 * JwtTokenUtils
 * Description: <br/>
 * date: 2020/5/5 15:45<br/>
 *
 * @author lvxk<br />
 * @since JDK 1.8
 */
public class JwtTokenUtils implements Serializable {

    private static final long serialVersionUID = 1L;

    /**
     * 用户名称
     */
    private static final String USERNAME = Claims.SUBJECT;
    /**
     * 创建时间
     */
    private static final String CREATED = "created";
    /**
     * 权限列表
     */
    private static final String AUTHORITIES = "authorities";
    /**
     * 密钥
     */
    private static final String SECRET = "abcdefgh";
    /**
     * 有效期12小时
     */
    private static final long EXPIRE_TIME = 12 * 60 * 60 * 1000;

    /**
     * 生成令牌
     *
     * @param authentication 用户
     * @return 令牌
     */
    public static String generateToken(Authentication authentication) {
        Map<String, Object> claims = new HashMap<>(3);
        claims.put(USERNAME, SecurityUtils.getUsername(authentication));
        claims.put(CREATED, new Date());
        claims.put(AUTHORITIES, authentication.getAuthorities());
        return generateToken(claims);
    }

    /**
     * 从数据声明生成令牌
     *
     * @param claims 数据声明
     * @return 令牌
     */
    private static String generateToken(Map<String, Object> claims) {
        Date expirationDate = new Date(System.currentTimeMillis() + EXPIRE_TIME);
        return Jwts.builder().setClaims(claims).setExpiration(expirationDate).signWith(SignatureAlgorithm.HS512, SECRET).compact();
    }

    /**
     * 从令牌中获取用户名
     *
     * @param token 令牌
     * @return 用户名
     */
    public static String getUsernameFromToken(String token) {
        String username;
        try {
            Claims claims = getClaimsFromToken(token);
            username = claims.getSubject();
        } catch (Exception e) {
            username = null;
        }
        return username;
    }

    /**
     * 根据请求令牌获取登录认证信息
     * @param request 令牌
     * @return 用户名
     */
    public static Authentication getAuthenticationeFromToken(HttpServletRequest request) {
        Authentication authentication = null;
        // 获取请求携带的令牌
        String token = JwtTokenUtils.getToken(request);
        if(token != null) {
            // 请求令牌不能为空
            if(SecurityUtils.getAuthentication() == null) {
                // 上下文中Authentication为空
                Claims claims = getClaimsFromToken(token);
                if(claims == null) {
                    return null;
                }
                String username = claims.getSubject();
                if(username == null) {
                    return null;
                }
                if(isTokenExpired(token)) {
                    return null;
                }
                Object authors = claims.get(AUTHORITIES);
                List<GrantedAuthority> authorities = new ArrayList<GrantedAuthority>();
                if (authors != null && authors instanceof List) {
                    for (Object object : (List) authors) {
                        authorities.add(new GrantedAuthorityImpl((String) ((Map) object).get("authority")));
                    }
                }
                authentication = new JwtAuthenticatioToken(username, null, authorities, token);
            } else {
                if(validateToken(token, SecurityUtils.getUsername())) {
                    // 如果上下文中Authentication非空，且请求令牌合法，直接返回当前登录认证信息
                    authentication = SecurityUtils.getAuthentication();
                }
            }
        }
        return authentication;
    }

    /**
     * 从令牌中获取数据声明
     *
     * @param token 令牌
     * @return 数据声明
     */
    private static Claims getClaimsFromToken(String token) {
        Claims claims;
        try {
            claims = Jwts.parser().setSigningKey(SECRET).parseClaimsJws(token).getBody();
        } catch (Exception e) {
            claims = null;
        }
        return claims;
    }

    /**
     * 验证令牌
     * @param token
     * @param username
     * @return
     */
    public static Boolean validateToken(String token, String username) {
        String userName = getUsernameFromToken(token);
        return (userName.equals(username) && !isTokenExpired(token));
    }

    /**
     * 刷新令牌
     * @param token
     * @return
     */
    public static String refreshToken(String token) {
        String refreshedToken;
        try {
            Claims claims = getClaimsFromToken(token);
            claims.put(CREATED, new Date());
            refreshedToken = generateToken(claims);
        } catch (Exception e) {
            refreshedToken = null;
        }
        return refreshedToken;
    }

    /**
     * 判断令牌是否过期
     *
     * @param token 令牌
     * @return 是否过期
     */
    public static Boolean isTokenExpired(String token) {
        try {
            Claims claims = getClaimsFromToken(token);
            Date expiration = claims.getExpiration();
            return expiration.before(new Date());
        } catch (Exception e) {
            return false;
        }
    }

    /**
     * 获取请求token
     * @param request
     * @return
     */
    public static String getToken(HttpServletRequest request) {
        String token = request.getHeader("Authorization");
        String tokenHead = "Bearer ";
        if(token == null) {
            token = request.getHeader("token");
        } else if(token.contains(tokenHead)){
            token = token.substring(tokenHead.length());
        }
        if("".equals(token)) {
            token = null;
        }
        return token;
    }

}

6.JwtAuthenticationProvider

package com.lvxk.demo.admin.security;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;

/**
 * JwtAuthenticationProvider 
 * Description: <br/>
 * date: 2020/5/5 15:57<br/>
 *
 * @author lvxk<br />
 * @since JDK 1.8
 */
public class JwtAuthenticationProvider extends DaoAuthenticationProvider {

    public JwtAuthenticationProvider(UserDetailsService userDetailsService) {
        setUserDetailsService(userDetailsService);
    }

    @Override
    protected void additionalAuthenticationChecks(UserDetails userDetails, UsernamePasswordAuthenticationToken authentication)
            throws AuthenticationException {
        if (authentication.getCredentials() == null) {
            logger.debug("Authentication failed: no credentials provided");
            throw new BadCredentialsException(messages.getMessage("AbstractUserDetailsAuthenticationProvider.badCredentials", "Bad credentials"));
        }

        String presentedPassword = authentication.getCredentials().toString();
        String salt = ((JwtUserDetails) userDetails).getSalt();
        // 覆写密码验证逻辑
        if (!new PasswordEncoder(salt).matches(userDetails.getPassword(), presentedPassword)) {
            logger.debug("Authentication failed: password does not match stored value");
            throw new BadCredentialsException(messages.getMessage("AbstractUserDetailsAuthenticationProvider.badCredentials", "Bad credentials"));
        }
    }

}

7.认证信息查询 security包下新建一个UserDetailsServiceImpl

package com.lvxk.demo.admin.security;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
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;

/**
 * 用户登录认证信息查询
 * Description: <br/>
 * date: 2020/5/5 15:59<br/>
 *
 * @author lvxk<br />
 * @since JDK 1.8
 */
@Service
public class UserDetailsServiceImpl implements UserDetailsService {

    @Autowired
    private SysUserService sysUserService;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        SysUser user = sysUserService.findByName(username);
        if (user == null) {
            throw new UsernameNotFoundException("该用户不存在");
        }
        // 用户权限列表，根据用户拥有的权限标识与如 @PreAuthorize("hasAuthority('sys:menu:view')") 标注的接口对比，决定是否可以调用接口
        Set<String> permissions = sysUserService.findPermissions(user.getName());
        List<GrantedAuthority> grantedAuthorities = permissions.stream().map(GrantedAuthorityImpl::new).collect(Collectors.toList());
        return new JwtUserDetails(user.getName(), user.getPassword(), user.getSalt(), grantedAuthorities);
    }
}

8.安全用户模型JwtUserDetails

package com.lvxk.demo.admin.security;
import java.util.Collection;

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;

import com.fasterxml.jackson.annotation.JsonIgnore;

/**
 * 安全用户模型
 * Description: <br/>
 * date: 2020/5/5 16:05<br/>
 *
 * @author lvxk<br />
 * @since JDK 1.8
 */
public class JwtUserDetails implements UserDetails {

    private static final long serialVersionUID = 1L;

    private String username;
    private String password;
    private String salt;
    private Collection<? extends GrantedAuthority> authorities;

    JwtUserDetails(String username, String password, String salt, Collection<? extends GrantedAuthority> authorities) {
        this.username = username;
        this.password = password;
        this.salt = salt;
        this.authorities = authorities;
    }

    @Override
    public String getUsername() {
        return username;
    }

    @JsonIgnore
    @Override
    public String getPassword() {
        return password;
    }

    public String getSalt() {
        return salt;
    }

    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
        return authorities;
    }

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

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

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

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