<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-security</artifactId>
</dependency>

@Autowired
  private UserDetailsService myUserDetailServiceImpl; // 用戶信息服務(wù)
  @Autowired
  private DataSource dataSource; // 數(shù)據(jù)源
  @Override
  protected void configure(HttpSecurity http) throws Exception {
    // formLogin()是默認(rèn)的登錄表單頁(yè)，如果不配置 loginPage(url)，則使用 spring security
    // 默認(rèn)的登錄頁(yè)，如果配置了 loginPage()則使用自定義的登錄頁(yè)
    http.formLogin() // 表單登錄
        .loginPage(SecurityConst.AUTH_REQUIRE)
        .loginProcessingUrl(SecurityConst.AUTH_FORM) // 登錄請(qǐng)求攔截的url,也就是form表單提交時(shí)指定的action
        .successHandler(loginSuccessHandler)
        .failureHandler(loginFailureHandler)
        .and()
      .rememberMe()
        .userDetailsService(myUserDetailServiceImpl) // 設(shè)置userDetailsService
        .tokenRepository(persistentTokenRepository()) // 設(shè)置數(shù)據(jù)訪問(wèn)層
        .tokenValiditySeconds(60 * 60) // 記住我的時(shí)間(秒)
        .and()
      .authorizeRequests() // 對(duì)請(qǐng)求授權(quán)
        .antMatchers(SecurityConst.AUTH_REQUIRE, securityProperty.getBrowser().getLoginPage()).permitAll() // 允許所有人訪問(wèn)login.html和自定義的登錄頁(yè)
        .anyRequest() // 任何請(qǐng)求
        .authenticated()// 需要身份認(rèn)證
        .and()
      .csrf().disable() // 關(guān)閉跨站偽造
    ;
  }
  /**
   * 持久化token
   * 
   * Security中，默認(rèn)是使用PersistentTokenRepository的子類InMemoryTokenRepositoryImpl，將token放在內(nèi)存中
   * 如果使用JdbcTokenRepositoryImpl，會(huì)創(chuàng)建表persistent_logins，將token持久化到數(shù)據(jù)庫(kù)
   */
  @Bean
  public PersistentTokenRepository persistentTokenRepository() {
    JdbcTokenRepositoryImpl tokenRepository = new JdbcTokenRepositoryImpl();
    tokenRepository.setDataSource(dataSource); // 設(shè)置數(shù)據(jù)源
//    tokenRepository.setCreateTableOnStartup(true); // 啟動(dòng)創(chuàng)建表，創(chuàng)建成功后注釋掉
    return tokenRepository;
  }

// ...
  private RememberMeServices rememberMeServices = new NullRememberMeServices();
  protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response, FilterChain chain,
      Authentication authResult) throws IOException, ServletException {
    // ...
    SecurityContextHolder.getContext().setAuthentication(authResult);
    // 登錄成功后，調(diào)用RememberMeServices保存Token相關(guān)信息
    rememberMeServices.loginSuccess(request, response, authResult);
    // ...
  }

// ...

  private PersistentTokenRepository tokenRepository = new InMemoryTokenRepositoryImpl();
  protected void onLoginSuccess(HttpServletRequest request,
      HttpServletResponse response, Authentication successfulAuthentication) {
    String username = successfulAuthentication.getName();

    logger.debug("Creating new persistent login for user " + username);

    // 創(chuàng)建一個(gè)PersistentRememberMeToken
    PersistentRememberMeToken persistentToken = new PersistentRememberMeToken(
        username, generateSeriesData(), generateTokenData(), new Date());
    try {
      // 保存Token
      tokenRepository.createNewToken(persistentToken);
      // 將Token寫(xiě)到Cookie中
      addCookie(persistentToken, request, response);
    }
    catch (Exception e) {
      logger.error("Failed to save persistent token ", e);
    }
  }

/** The default SQL used by <tt>createNewToken</tt> */
  public static final String DEF_INSERT_TOKEN_SQL = "insert into persistent_logins (username, series, token, last_used) values(?,?,?,?)";

  public void createNewToken(PersistentRememberMeToken token) {
    getJdbcTemplate().update(insertTokenSql, token.getUsername(), token.getSeries(),
        token.getTokenValue(), token.getDate());
  }

protected UserDetails processAutoLoginCookie(String[] cookieTokens,
      HttpServletRequest request, HttpServletResponse response) {

    if (cookieTokens.length != 2) {
      throw new InvalidCookieException("Cookie token did not contain " + 2
          + " tokens, but contained '" + Arrays.asList(cookieTokens) + "'");
    }

    // 從Cookie中獲取Series和Token
    final String presentedSeries = cookieTokens[0];
    final String presentedToken = cookieTokens[1]; 

    //在數(shù)據(jù)庫(kù)中，通過(guò)Series查詢PersistentRememberMeToken
    PersistentRememberMeToken token = tokenRepository
        .getTokenForSeries(presentedSeries);

    if (token == null) {
      throw new RememberMeAuthenticationException(
          "No persistent token found for series id: " + presentedSeries);
    }

    // 校驗(yàn)數(shù)據(jù)庫(kù)中Token和Cookie中的Token是否相同
    if (!presentedToken.equals(token.getTokenValue())) {
      tokenRepository.removeUserTokens(token.getUsername());

      throw new CookieTheftException(
          messages.getMessage(
              "PersistentTokenBasedRememberMeServices.cookieStolen",
              "Invalid remember-me token (Series/token) mismatch. Implies previous cookie theft attack."));
    }

    // 判斷Token是否超時(shí)
    if (token.getDate().getTime() + getTokenValiditySeconds() * 1000L < System
        .currentTimeMillis()) {
      throw new RememberMeAuthenticationException("Remember-me login has expired");
    }

    if (logger.isDebugEnabled()) {
      logger.debug("Refreshing persistent login token for user '"
          + token.getUsername() + "', series '" + token.getSeries() + "'");
    }
    
    // 創(chuàng)建一個(gè)新的PersistentRememberMeToken
    PersistentRememberMeToken newToken = new PersistentRememberMeToken(
        token.getUsername(), token.getSeries(), generateTokenData(), new Date());

    try {
      //更新數(shù)據(jù)庫(kù)中Token
      tokenRepository.updateToken(newToken.getSeries(), newToken.getTokenValue(),
          newToken.getDate());
      //重新寫(xiě)到Cookie
      addCookie(newToken, request, response);
    }
    catch (Exception e) {
      logger.error("Failed to update token: ", e);
      throw new RememberMeAuthenticationException(
          "Autologin failed due to data access problem");
    }
    //調(diào)用UserDetailsService獲取用戶信息
    return getUserDetailsService().loadUserByUsername(token.getUsername());
  }