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跳过了官方Learning中较简单的Swagger-UI的实现和整合Redis实现缓存功能的部分,通过整合SpringSecurity和JWT实现后台用户的登录和授权功能,同时改造Swagger-UI的配置使其可以自动记住登录令牌进行发送。
SpringSecurity是一个强大的可高度定制的认证和授权框架,对于Spring应用来说它是一套Web安全标准。
SpringSecurity注重于为Java应用提供认证和授权功能,像所有的Spring项目一样,它对自定义需求具有强大的扩展性。
JWT是JSON WEB TOKEN的缩写,它是基于 RFC 7519 标准定义的一种可以安全传输的的JSON对象,
由于使用了数字签名,所以是可信任和安全的。
{"alg": "HS512"}
{"sub":"admin","created":1489079981393,"exp":1489684781}
//secret为加密算法的密钥
String signature = HMACSHA512(base64UrlEncode(header) + "." +base64UrlEncode(payload),secret)
eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiJhZG1pbiIsImNyZWF0ZWQiOjE1NTY3NzkxMjUzMDksImV4cCI6MTU1NzM4MzkyNX0.d-iki0193X0bBOETf2UN3r3PotNIEAV7mzIxxeI5IxFyzzkOZxS0PGfF_SK6wxCv2K8S0cZjMkv6b5bCqc0VBw
可以在该网站上获得解析结果:https://jwt.io/
Hutool是一个丰富的Java开源工具包,它帮助我们简化每一行代码,减少每一个方法,mall项目采用了此工具包。
ums_admin
:后台用户表ums_role
:后台用户角色表ums_permission
:后台用户权限表ums_admin_role_relation
:后台用户和角色关系表,用户与角色是多对多关系ums_role_permission_relation
:后台用户角色和权限关系表,角色与权限是多对多关系ums_admin_permission_relation
:后台用户和权限关系表(除角色中定义的权限以外的加减权限),加权限是指用户比角色多出的权限,减权限是指用户比角色少的权限
<!--SpringSecurity依赖配置-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<!--Hutool Java工具包-->
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>4.5.7</version>
</dependency>
<!--JWT(Json Web Token)登录支持-->
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.9.0</version>
</dependency>
/**
* 根据用户信息生成token
*/
public String generateToken(UserDetails userDetails) {
Map<String, Object> claims = new HashMap<>();
claims.put(CLAIM_KEY_USERNAME, userDetails.getUsername());
claims.put(CLAIM_KEY_CREATED, new Date());
return generateToken(claims);
}
/**
* 根据负责生成JWT的token
*/
private String generateToken(Map<String, Object> claims) {
return Jwts.builder()
.setClaims(claims)
.setExpiration(generateExpirationDate())
.signWith(SignatureAlgorithm.HS512, secret)
.compact();
}
/**
* 从token中获取登录用户名
*/
public String getUserNameFromToken(String token) {
String username;
try {
Claims claims = getClaimsFromToken(token);
username = claims.getSubject();
} catch (Exception e) {
username = null;
}
return username;
}
/**
* 验证token是否还有效
*
* @param token 客户端传入的token
* @param userDetails 从数据库中查询出来的用户信息
*/
public boolean validateToken(String token, UserDetails userDetails) {
String username = getUserNameFromToken(token);
return username.equals(userDetails.getUsername()) && !isTokenExpired(token);
}
/**
* SpringSecurity的配置
*/
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled=true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private UmsAdminService adminService;
@Autowired
private RestfulAccessDeniedHandler restfulAccessDeniedHandler;
@Autowired
private RestAuthenticationEntryPoint restAuthenticationEntryPoint;
@Override
protected void configure(HttpSecurity httpSecurity) throws Exception {
httpSecurity.csrf()// 由于使用的是JWT,我们这里不需要csrf
.disable()
.sessionManagement()// 基于token,所以不需要session
.sessionCreationPolicy(SessionCreationPolicy.STATELESS)
.and()
.authorizeRequests()
.antMatchers(HttpMethod.GET, // 允许对于网站静态资源的无授权访问
"/",
"/*.html",
"/favicon.ico",
"/**/*.html",
"/**/*.css",
"/**/*.js",
"/swagger-resources/**",
"/v2/api-docs/**"
)
.permitAll()
.antMatchers("/admin/login", "/admin/register")// 对登录注册要允许匿名访问
.permitAll()
.antMatchers(HttpMethod.OPTIONS)//跨域请求会先进行一次options请求
.permitAll()
// .antMatchers("/**")//测试时全部运行访问
// .permitAll()
.anyRequest()// 除上面外的所有请求全部需要鉴权认证
.authenticated();
// 禁用缓存
httpSecurity.headers().cacheControl();
// 添加JWT filter
httpSecurity.addFilterBefore(jwtAuthenticationTokenFilter(), UsernamePasswordAuthenticationFilter.class);
//添加自定义未授权和未登录结果返回
httpSecurity.exceptionHandling()
.accessDeniedHandler(restfulAccessDeniedHandler)
.authenticationEntryPoint(restAuthenticationEntryPoint);
}
}
/**
* 当访问接口没有权限时,自定义的返回结果
*/
@Component
public class RestfulAccessDeniedHandler implements AccessDeniedHandler{
@Override
public void handle(HttpServletRequest request,
HttpServletResponse response,
AccessDeniedException e) throws IOException, ServletException {
response.setCharacterEncoding("UTF-8");
response.setContentType("application/json");
response.getWriter().println(JSONUtil.parse(CommonResult.forbidden(e.getMessage())));
response.getWriter().flush();
}
}
/**
* 当未登录或者token失效访问接口时,自定义的返回结果
*/
@Component
public class RestAuthenticationEntryPoint implements AuthenticationEntryPoint {
@Override
public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException) throws IOException, ServletException {
response.setCharacterEncoding("UTF-8");
response.setContentType("application/json");
response.getWriter().println(JSONUtil.parse(CommonResult.unauthorized(authException.getMessage())));
response.getWriter().flush();
}
}
在用户名和密码校验前添加的过滤器,如果请求中有jwt的token且有效,会取出token中的用户名,
然后调用SpringSecurity的API进行登录操作。
/**
* JWT登录授权过滤器
*/
public class JwtAuthenticationTokenFilter extends OncePerRequestFilter {
private static final Logger LOGGER = LoggerFactory.getLogger(JwtAuthenticationTokenFilter.class);
@Autowired
private UserDetailsService userDetailsService;
@Autowired
private JwtTokenUtil jwtTokenUtil;
@Value("${jwt.tokenHeader}")
private String tokenHeader;
@Value("${jwt.tokenHead}")
private String tokenHead;
@Override
protected void doFilterInternal(HttpServletRequest request,
HttpServletResponse response,
FilterChain chain) throws ServletException, IOException {
String authHeader = request.getHeader(this.tokenHeader);
if (authHeader != null && authHeader.startsWith(this.tokenHead)) {
String authToken = authHeader.substring(this.tokenHead.length());// The part after "Bearer "
String username = jwtTokenUtil.getUserNameFromToken(authToken);
LOGGER.info("checking username:{}", username);
if (username != null && SecurityContextHolder.getContext().getAuthentication() == null) {
UserDetails userDetails = this.userDetailsService.loadUserByUsername(username);
if (jwtTokenUtil.validateToken(authToken, userDetails)) {
UsernamePasswordAuthenticationToken authentication = new UsernamePasswordAuthenticationToken(userDetails, null, userDetails.getAuthorities());
authentication.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
LOGGER.info("authenticated user:{}", username);
SecurityContextHolder.getContext().setAuthentication(authentication);
}
}
}
chain.doFilter(request, response);
}
}
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