解析SpringSecurity自定义登录验证成功与失败的结果处理问题

@Component
public class MyAuthenticationSuccessHandler 
            extends SavedRequestAwareAuthenticationSuccessHandler {
  //在application配置文件中配置登陆的类型是JSON数据响应还是做页面响应
  @Value("${spring.security.logintype}")
  private String loginType;
  private static ObjectMapper objectMapper = new ObjectMapper();
  @Override
  public void onAuthenticationSuccess(HttpServletRequest request, 
                    HttpServletResponse response, 
                    Authentication authentication) 
                    throws ServletException, IOException {
    if (loginType.equalsIgnoreCase("JSON")) {
      response.setContentType("application/json;charset=UTF-8");
      response.getWriter().write(objectMapper.writeValueAsString(AjaxResponse.success()));
    } else {
      // 会帮我们跳转到上一次请求的页面上
      super.onAuthenticationSuccess(request, response, authentication);
    }
  }
}

@Component
public class MyAuthenticationFailureHandler extends SimpleUrlAuthenticationFailureHandler {
  //在application配置文件中配置登陆的类型是JSON数据响应还是做页面响应
  @Value("${spring.security.logintype}")
  private String loginType;
  private static ObjectMapper objectMapper = new ObjectMapper();
  @Override
  public void onAuthenticationFailure(HttpServletRequest request,
                    HttpServletResponse response, 
                    AuthenticationException exception) 
                    throws IOException, ServletException {
    if (loginType.equalsIgnoreCase("JSON")) {
      response.setContentType("application/json;charset=UTF-8");
      response.getWriter().write(
          objectMapper.writeValueAsString(
              AjaxResponse.error(
                  new CustomException(
                    CustomExceptionType.USER_INPUT_ERROR,
                    "用户名或密码存在错误，请检查后再次登录"))));
    } else {
      response.setContentType("text/html;charset=UTF-8");
      super.onAuthenticationFailure(request, response, exception);
    }
  }
}

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
  @Resource
  private MyAuthenticationSuccessHandler myAuthenticationSuccessHandler;
  @Resource
  private MyAuthenticationFailureHandler myAuthenticationFailureHandler;
  @Override
  protected void configure(HttpSecurity http) throws Exception {
    http.csrf().disable() //禁用跨站csrf攻击防御，后面的章节会专门讲解
      .formLogin()
      .successHandler(myAuthenticationSuccessHandler)
      .failureHandler(myAuthenticationFailureHandler)
      .defaultSuccessUrl("/index")//登录认证成功后默认转跳的路径
      .failureUrl("/login.html") //登录认证是被跳转页面
}