Java DAOImpl中的Spring MVC读取属性文件为空

我需要读取UserDetailsDaoImpl中的属性值。我正在使用Spring安全性

<beans:bean id="userDetailsDao" class="com.setelog.spring.dao.UserDetailsDaoImpl" >
    <beans:property name="dataSource" ref="dataSource" />
</beans:bean>

<beans:bean id="encoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"/>


<beans:bean id="authenticationProvider"
    class="com.setelog.spring.handler.LimitLoginAuthenticationProvider">
    <beans:property name="userDetailsService" ref="customUserDetailsService" />
    <beans:property name="userDetailsDao" ref="userDetailsDao" />
    <beans:property name="passwordEncoder" ref="encoder" />

</beans:bean>

它成功地读取

@控制器的内部

，但不在此类中，可能是因为它是

@存储库

<beans:bean id="userDetailsDao" class="com.setelog.spring.dao.UserDetailsDaoImpl" >
    <beans:property name="dataSource" ref="dataSource" />
</beans:bean>

<beans:bean id="encoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"/>


<beans:bean id="authenticationProvider"
    class="com.setelog.spring.handler.LimitLoginAuthenticationProvider">
    <beans:property name="userDetailsService" ref="customUserDetailsService" />
    <beans:property name="userDetailsDao" ref="userDetailsDao" />
    <beans:property name="passwordEncoder" ref="encoder" />

</beans:bean>

如何读取属性值

<beans:bean id="userDetailsDao" class="com.setelog.spring.dao.UserDetailsDaoImpl" >
    <beans:property name="dataSource" ref="dataSource" />
</beans:bean>

<beans:bean id="encoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"/>


<beans:bean id="authenticationProvider"
    class="com.setelog.spring.handler.LimitLoginAuthenticationProvider">
    <beans:property name="userDetailsService" ref="customUserDetailsService" />
    <beans:property name="userDetailsDao" ref="userDetailsDao" />
    <beans:property name="passwordEncoder" ref="encoder" />

</beans:bean>

UserDetailsDaoImpl:

@Repository
public class UserDetailsDaoImpl extends JdbcDaoSupport implements UserDetailsDao {

    @Value("${emails_blocked}")
    private String emails_blocked;

@Autowired
UserDetailsDao userDetailsDao;

@Override
public Authentication authenticate(Authentication authentication) throws AuthenticationException {

    try {

        Authentication auth = super.authenticate(authentication);

        // if reach here, means login success, else exception will be thrown
        // reset the user_attempts
        userDetailsDao.resetFailAttempts(authentication.getName());

        return auth;

    } catch (BadCredentialsException e) {

        userDetailsDao.updateFailAttempts(authentication.getName());
        throw e;

    }

<beans:bean id="userDetailsDao" class="com.setelog.spring.dao.UserDetailsDaoImpl" >
    <beans:property name="dataSource" ref="dataSource" />
</beans:bean>

<beans:bean id="encoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"/>


<beans:bean id="authenticationProvider"
    class="com.setelog.spring.handler.LimitLoginAuthenticationProvider">
    <beans:property name="userDetailsService" ref="customUserDetailsService" />
    <beans:property name="userDetailsDao" ref="userDetailsDao" />
    <beans:property name="passwordEncoder" ref="encoder" />

</beans:bean>

static String emails_blocked;

public static void setEmails_Blocked(String emails_blocked){
    UserDetailsDaoImpl.emails_blocked= emails_blocked;
}

豆子：

<context:property-placeholder location="classpath:config.properties"/>

<beans:bean id="userDetailsDao" class="com.setelog.spring.dao.UserDetailsDaoImpl" >
    <beans:property name="dataSource" ref="dataSource" />
</beans:bean>

<beans:bean id="encoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"/>


<beans:bean id="authenticationProvider"
    class="com.setelog.spring.handler.LimitLoginAuthenticationProvider">
    <beans:property name="userDetailsService" ref="customUserDetailsService" />
    <beans:property name="userDetailsDao" ref="userDetailsDao" />
    <beans:property name="passwordEncoder" ref="encoder" />

</beans:bean>

我的豆豆更新：

<beans:bean id="userDetailsDao" class="com.setelog.spring.dao.UserDetailsDaoImpl" >
    <beans:property name="dataSource" ref="dataSource" />
</beans:bean>

<beans:bean id="encoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"/>


<beans:bean id="authenticationProvider"
    class="com.setelog.spring.handler.LimitLoginAuthenticationProvider">
    <beans:property name="userDetailsService" ref="customUserDetailsService" />
    <beans:property name="userDetailsDao" ref="userDetailsDao" />
    <beans:property name="passwordEncoder" ref="encoder" />

</beans:bean>

<beans:bean id="userDetailsDao" class="com.setelog.spring.dao.UserDetailsDaoImpl" >
    <beans:property name="dataSource" ref="dataSource" />
</beans:bean>

<beans:bean id="encoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"/>


<beans:bean id="authenticationProvider"
    class="com.setelog.spring.handler.LimitLoginAuthenticationProvider">
    <beans:property name="userDetailsService" ref="customUserDetailsService" />
    <beans:property name="userDetailsDao" ref="userDetailsDao" />
    <beans:property name="passwordEncoder" ref="encoder" />

</beans:bean>

---

我的问题是，因为我调用了一个方法，它不会加载@Value，所以我必须注入一些bean。 像这样：

<beans:bean id="userDetailsDao" class="com.setelog.spring.dao.UserDetailsDaoImpl" >
    <beans:property name="dataSource" ref="dataSource" />
</beans:bean>

<beans:bean id="encoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"/>


<beans:bean id="authenticationProvider"
    class="com.setelog.spring.handler.LimitLoginAuthenticationProvider">
    <beans:property name="userDetailsService" ref="customUserDetailsService" />
    <beans:property name="userDetailsDao" ref="userDetailsDao" />
    <beans:property name="passwordEncoder" ref="encoder" />

</beans:bean>

<bean
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:config.properties</value>            
            </list>
        </property>
    </bean>

    <bean class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
        <property name="staticMethod" value="com.setelog.spring.dao.UserDetailsDaoImpl.setEmails_Blocked"/>
        <property name="arguments">
            <list>
                <value>${emails_blocked}</value>
            </list>
       </property>
    </bean>

这个答案对我帮助很大：

---

确保您自己没有创建新实例，并且在

@存储库

所在的上下文中也有一个

。如果没有任何东西将被替换。@M.Deinum您能给我举个例子吗？我不明白。谢谢你怎么不明白？检查您使用此控制器的位置您自己没有创建新实例，并确保您在定义/加载存储库的应用程序上下文中配置了占位符。我已更新了我的问题，说明了如何调用它。我还添加了一个autowire并检查了占位符，但仍然是相同的配置文件中没有

，因此您的

@Value

基本上是无用的。添加它。不，您不需要。您只需要在正确的上下文中指定

。它将只在相同上下文中的bean上运行，在您的情况下，仅由

DispatcherServlet

加载的bean将该行添加到

ContextLoaderListener

。

<beans:bean id="userDetailsDao" class="com.setelog.spring.dao.UserDetailsDaoImpl" >
    <beans:property name="dataSource" ref="dataSource" />
</beans:bean>

<beans:bean id="encoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"/>


<beans:bean id="authenticationProvider"
    class="com.setelog.spring.handler.LimitLoginAuthenticationProvider">
    <beans:property name="userDetailsService" ref="customUserDetailsService" />
    <beans:property name="userDetailsDao" ref="userDetailsDao" />
    <beans:property name="passwordEncoder" ref="encoder" />

</beans:bean>