SpringSecurity-1-AuthenticationSuccessHandler接口(登录成功之后的处理逻辑)

@EnableWebSecurity
public class A extends WebSecurityConfigrerAdapter{
    @Override
    protected void configure(HttpSecurity http) throws Exception{
        http.anthorizeRequests().anyRequest().authenticated().and()
        //我不太明白这个processingUrl是什么意思，难道表单中的action可以不写？？
        formLogin().loginPage("你的登录页面.html").loginProcessingUrl("/login").
        //以下处理自定义逻辑
        successHandler(new AuthenticationSuccessHandler(){
            @Override
            public void onAuthenticationSuccess(HttpServletRequest request,HttpServletResponse,Authentication auth){
                //这里直接写自己的处理逻辑，比如下面这段代码
                response.setContentType("application/json;charset=UTF-8");
                PrintWriter out=response.getWriter();
                out.write("一个JSON串");
            }
        })
        //此处我们可以继续点失败的逻辑
    }
}