@DependsOn(value="userService")
public class AuthcRealm implements Realm {
@Autowired
@Lazy(value=false)
@Qualifier(value="userService")
private UserServiceImpl userService;//here I did the injection
public AuthcRealm() {
System.out.print("realm constructor");
}
public String getName() {
return "AuthenticateRealm";
}
public boolean supports(AuthenticationToken token) {
return token instanceof UsernamePasswordToken;
}
public AuthenticationInfo getAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
//serServiceImpl userService=new UserServiceImpl();
User user=new User();
user.setUsername((String)token.getPrincipal());
user.setCredential(new String((char[])token.getCredentials()));
System.out.println((String)token.getPrincipal());
System.out.println(new String((char[])token.getCredentials()));
System.out.println(userService.getClass().toString());//at here I got a NullPointerException
if(!userService.isExist(user)){
System.out.println("user not exist");
throw new UnknownAccountException();
}
if(!userService.isValid(user)){
throw new IncorrectCredentialsException();
}
return new SimpleAuthenticationInfo(user.getUsername(), user.getCredential(), getName());
}
}
tomcat 给出了以下错误输出:
Serious: Servlet.service() for servlet [spring] in context with path [/Fentalk] threw exception [Request processing failed; nested exception is org.apache.shiro.authc.AuthenticationException: Authentication failed for token submission [org.apache.shiro.authc.UsernamePasswordToken - ADMIN, rememberMe=false]. Possible unexpected error? (Typical or expected login exceptions should extend from AuthenticationException).] with root cause
java.lang.NullPointerException
at com.fentalk.shiro.realm.AuthcRealm.getAuthenticationInfo(AuthcRealm.java:46)
at org.apache.shiro.authc.pam.ModularRealmAuthenticator.doSingleRealmAuthentication(ModularRealmAuthenticator.java:180)
at org.apache.shiro.authc.pam.ModularRealmAuthenticator.doAuthenticate(ModularRealmAuthenticator.java:267)
at org.apache.shiro.authc.AbstractAuthenticator.authenticate(AbstractAuthenticator.java:198)
at org.apache.shiro.mgt.AuthenticatingSecurityManager.authenticate(AuthenticatingSecurityManager.java:106)
at org.apache.shiro.mgt.DefaultSecurityManager.login(DefaultSecurityManager.java:270)
at org.apache.shiro.subject.support.DelegatingSubject.login(DelegatingSubject.java:256)
at com.fentalk.ctrl.AccountController.doLogin(AccountController.java:58)
主要是告诉我我的 userService 无法注入(inject),得到一个 NullPointerException
token 首先在我的 AccountController
中构建。
我已经确定 spring 正在扫描这个类,并且 token 不为空。
有好心人求shiro配置,这里有
<bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
<property name="realm" ref="authRealm" />
</bean>
<bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
<property name="securityManager" ref="securityManager" />
<property name="loginUrl" value="/home/index.jsp" />
<property name="successUrl" value="/main/index" />
<property name="filterChainDefinitions">
</property>
</bean>
<bean id=" authRealm" class="com.fentalk.shiro.realm.AuthcRealm">
</bean>
<bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor"/>
最佳答案
userService为null是spring配置错误,与shiro无关。
您正在将 spring 注释与 xml 配置混合在一起。
在您的 AuthcRealm 中,您尝试 Autowiring 用户服务:
@Autowired
@Lazy(value=false)
@Qualifier(value="userService")
private UserServiceImpl userService;//here I did the injection
然后你在 xml 中显示你的 spring 配置。
<bean id=" authRealm" class="com.fentalk.shiro.realm.AuthcRealm">
</bean>
您要么忘记了 xml 中的以下 spring 配置部分来进行 Autowiring :
<context:annotation-config/>
我们明确地将用户服务放入其中,例如:
<bean id="userService" class="<yourpackage>.UserServiceImpl">
<!-- other injections -->
</bean>
<bean id="authRealm" class="com.fentalk.shiro.realm.AuthcRealm">
<property name="userService" ref="userService"/>
</bean>
关于java - 使用 Shiro 、 NullPointerException 时对 Spring 进行注释,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/25114907/