覆盖UsernamePasswordAuthenticationFilter后怎么rememberMe

在覆盖`UsernamePasswordAuthenticationFilter`后，您可以实现Remember Me功能来住用户的登录状态以下是实现此功能的一步骤：

1. 创建一个实现`RememberMeServices`接口的类，用于处理Remember Me功能的逻辑。您可以在该类中实现生成和验证Remember Me令牌的方法。例如，您可以使用加密算法生成令牌，并将令牌存储在用户的cookie中。

import org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationException;
import org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter;
import org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationToken;
import org.springframework.security.web.authentication.rememberme.RememberMeServices;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Arrays;

public class CustomRememberMeServices implements RememberMeServices {

    private static final String REMEMBER_ME_COOKIE_NAME = "rememberMeCookie";

    @Override
    public Authentication autoLogin(HttpServletRequest request, HttpServletResponse response) {
        String rememberMeToken = getRememberMeTokenFromCookie(request);

        if (rememberMeToken != null) {
            // 验证Remember Me令牌的有效性
            // 如果令牌有效，返回一个RememberMeAuthenticationToken
            // 如果令牌无效，抛出RememberMeAuthenticationException
        }

        return null;
    }

    @Override
    public void loginFail(HttpServletRequest request, HttpServletResponse response) {
        // 登录失败时的处理逻辑
    }

    @Override
    public void loginSuccess(HttpServletRequest request, HttpServletResponse response, Authentication successfulAuthentication) {
        if (successfulAuthentication instanceof UsernamePasswordAuthenticationToken) {
            // 生成Remember Me令牌
            String rememberMeToken = generateRememberMeToken((UsernamePasswordAuthenticationToken) successfulAuthentication);

            // 将令牌存储在cookie中
            storeRememberMeTokenInCookie(request, response, rememberMeToken);
        }
    }

    private String getRememberMeTokenFromCookie(HttpServletRequest request) {
        // 从cookie中获取Remember Me令牌
    }

    private String generateRememberMeToken(UsernamePasswordAuthenticationToken authentication) {
        // 生成Remember Me令牌的逻辑
    }

    private void storeRememberMeTokenInCookie(HttpServletRequest request, HttpServletResponse response, String rememberMeToken) {
        // 将Remember Me令牌存储在cookie中
    }
}

2. 创建一个实现`RememberMeAuthenticationFilter`的类，用于拦截请求并处理Remember Me功能。在该类中，您可以调用`rememberMeServices()`方法来设置先前创建的`CustomRememberMeServices`实例。

import org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter;

public class CustomRememberMeAuthenticationFilter extends RememberMeAuthenticationFilter {

    public CustomRememberMeAuthenticationFilter(AuthenticationManager authenticationManager, RememberMeServices rememberMeServices) {
        super(authenticationManager, rememberMeServices);
    }
}

3. 在Spring Security配置类中，将`CustomRememberMeAuthenticationFilter`添加到过滤器链中，并配置相关属性。

import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .addFilter(customRememberMeAuthenticationFilter())
            // 其他配置...
    }

    private CustomRememberMeAuthenticationFilter customRememberMeAuthenticationFilter() throws Exception {
        CustomRememberMeAuthenticationFilter filter = new CustomRememberMeAuthenticationFilter(authenticationManager(), rememberMeServices());
        filter.setRememberMeParameterName("rememberMe");
        return filter;
    }

    private CustomRememberMeServices rememberMeServices() {
        return new CustomRememberMeServices();
    }
}

通过以上步骤，您可以覆盖`UsernamePasswordAuthenticationFilter`并实现Remember Me功能来记住用户的登录状态。请根据您的具体需求和系统配置进行适当调整。