我可以在扩展另一个类（SimpleUrlAuthenticationSuccessHandler）的类中“自动装配”吗？

Question

我有一个类，它会激活SimpleUrlAuthenticationSuccessHandler。

我尝试自动连接我的另一个类，注释为@Component，但是当我调用这个类（扩展的类）时，我收到了这个错误：

java.lang.NullPointerException
    com.springgestioneerrori.loginhandler.CustomAuthenticationSuccessHandler.onAuthenticationSuccess(CustomAuthenticationSuccessHandler.java:33)
    org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.successfulAuthentication(AbstractAuthenticationProcessingFilter.java:329)
    org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.successfulAuthentication(AbstractAuthenticationProcessingFilter.java:294)
    org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:219)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
    org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
    org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
    org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)

这是扩展SimpleUrlAuthenticationSuccessHandler

的类

 package com.springgestioneerrori.loginhandler;

import java.io.IOException;
import java.util.Collection;
import java.util.Iterator;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.web.authentication.SimpleUrlAuthenticationSuccessHandler;
import org.springframework.stereotype.Component;

import com.springgestioneerrori.struttura.Menu;

@Component
public class CustomAuthenticationSuccessHandler extends SimpleUrlAuthenticationSuccessHandler {     


    @Autowired
    Menu menu;

    @Override
    public void onAuthenticationSuccess(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, Authentication authentication) throws IOException, javax.servlet.ServletException{         

       menu.prova();   <------ here menu is null       

       Collection<SimpleGrantedAuthority> authorities = (Collection<SimpleGrantedAuthority>) SecurityContextHolder.getContext().getAuthentication().getAuthorities();

       Iterator<SimpleGrantedAuthority> i = authorities.iterator();

        while(i.hasNext()){
            System.out.println(i.next().toString());
        }       

        System.out.println("sto onAuthenticationSuccess");
        super.setDefaultTargetUrl("/index");        
        super.onAuthenticationSuccess(request, response, authentication);
    }

}

菜单类

package com.springgestioneerrori.struttura; 


@Component
public class Menu { 
    public void prova(){
        System.out.println("prova");
    }

}

这是web-servlet.xml的一段代码

<context:component-scan base-package="com.springgestioneerrori.struttura"/> 
<context:component-scan base-package="com.springgestioneerrori.loginhandler"/>

安全配置

....
    <form-login 
                    login-page="/login"         
                    default-target-url="/index" 
                    always-use-default-target="true"
                    authentication-success-handler-ref="customSuccessHandler"                 
                    authentication-failure-handler-ref="customFailureHandler"   
                    username-parameter="j_username"         
                    password-parameter="j_password" />
....

    <beans:bean id="customSuccessHandler" class="com.springgestioneerrori.loginhandler.CustomAuthenticationSuccessHandler"/>

...

Whene调试，菜单为空

有什么问题？

Answer 1

你可以这样做。假设这是Menu内的CustomAuthenticationSuccessHandler声明。

private Menu menu;

public Menu getMenu() {
    return menu;
}

public void setMenu(Menu menu) {
    this.menu= menu;
}

现在我们可以在这里使用属性注入。内部安全配置

<beans:bean id="menu" class="menu path goes here....">
</beans:bean>

 <beans:bean id="customSuccessHandler" class="com.springgestioneerrori.loginhandler.CustomAuthenticationSuccessHandler">
<beans:property name="menu" ref="menu"/>
</beans:bean>

现在它应该解决你的问题。