摆动与春天的麻烦

我想在位于Spring Web MVC项目的Swing应用程序中使用@Autowired语句。我只是将它作为Java应用程序运行。摆动与春天的麻烦

import javax.mail.MessagingException; 
import javax.swing.*; 

import org.springframework.beans.factory.annotation.Autowired; 

import net.babobka.blog.headHunter.Converter; 

import java.awt.*; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.io.IOException; 
import java.text.SimpleDateFormat; 
import java.util.ArrayList; 
import java.util.List; 

public class MainFrame implements ActionListener { 
    @Autowired 
    private Converter converter;  
    JFrame jfrm = new JFrame("Project backup system"); 
    JButton startButton = new JButton("Start"), 
      stopButton = new JButton("Stop"); 
    JLabel statusLab = new JLabel(); 
    BackupThread bt; 

    MainFrame() { 
     int eur = (int) converter.getRate("EUR", "RUB");//This is MainFrame.java:29 
     jfrm.setLayout(new FlowLayout()); 
     startButton.addActionListener(this); 
     stopButton.addActionListener(this); 
     jfrm.setSize(275, 100); 
     jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     jfrm.add(startButton); 
     jfrm.add(stopButton); 
     jfrm.add(statusLab); 
     jfrm.setVisible(true); 
    }...

但是NullPointerException就是我所拥有的。布线有什么问题？完整跟踪：

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException 
    at net.babobka.blog.app.MainFrame.<init>(MainFrame.java:29) 
    at net.babobka.blog.app.MainFrame$1.run(MainFrame.java:60) 
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251) 
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:727) 
    at java.awt.EventQueue.access$200(EventQueue.java:103) 
    at java.awt.EventQueue$3.run(EventQueue.java:688) 
    at java.awt.EventQueue$3.run(EventQueue.java:686) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) 
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:697) 
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242) 
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161) 
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150) 
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146) 
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) 
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

Converter作品在其他类，除了摇摆应用。

根context.xml中：

<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" 
    xmlns:beans="http://www.springframework.org/schema/beans" 
    xmlns:context="http://www.springframework.org/schema/context" 
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:jee="http://www.springframework.org/schema/jee" 
    xmlns:lang="http://www.springframework.org/schema/lang" xmlns:p="http://www.springframework.org/schema/p" 
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" 
    xmlns:cache="http://www.springframework.org/schema/cache" xmlns:task="http://www.springframework.org/schema/task" 
    xsi:schemaLocation=" 
    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd 
    http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd 
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd  
    http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd 
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd 
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd 
     http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd 
     http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd 
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd 
     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd"> 



    <context:annotation-config /> 


    <context:component-scan base-package="net.babobka.blog" /> 
    <mvc:resources mapping="/resources/**" location="/resources/" /> 
    <cache:annotation-driven /> 

    <bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager"> 
     <property name="caches"> 
      <set> 
       <bean 
        class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean" 
        p:name="template" /> 
       <bean 
        class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean" 
        p:name="commonStatistic" /> 

       <bean 
        class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean" 
        p:name="langStatistic" /> 

      </set> 
     </property> 
    </bean> 

    <bean id="converter" class="net.babobka.blog.headHunter.Converter" /> 

    <bean id="googleCharts" class="net.babobka.blog.charts.GoogleCharts" /> 

    <bean id="sender" class="net.babobka.blog.backupper.Sender" /> 

    <bean id="mainFrame" class="net.babobka.blog.app.MainFrame" /> 


    <bean id="propertyConfigurer" 
     class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" 
     p:location="/WEB-INF/db/jdbc.properties" /> 

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" 
     destroy-method="close" p:driverClassName="${jdbc.driverClassName}" 
     p:url="${jdbc.databaseurl}" p:username="${jdbc.username}" p:password="${jdbc.password}" /> 
    <bean id="sessionFactory" 
     class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
     <property name="dataSource" ref="dataSource" /> 
     <property name="configLocation"> 
      <value>/WEB-INF/db/hibernate.cfg.xml</value> 
     </property> 
     <property name="configurationClass"> 
      <value>org.hibernate.cfg.AnnotationConfiguration</value> 
     </property> 
     <property name="hibernateProperties"> 
      <props> 
       <prop key="hibernate.dialect">${jdbc.dialect}</prop> 
       <prop key="hibernate.show_sql">${jdbc.show_sql}</prop> 
       <prop key="hibernate.connection.useUnicode">true</prop> 
       <prop key="hibernate.connection.characterEncoding">UTF-8</prop> 
       <prop key="hibernate.connection.charSet">UTF-8</prop> 
      </props> 
     </property> 
    </bean> 




    <bean id="transactionManager" 
     class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
     <property name="sessionFactory" ref="sessionFactory" /> 
    </bean> 
    <mvc:annotation-driven /> 
    <tx:annotation-driven /> 
    <task:annotation-driven /> 


    <bean id="Backupper" class="net.babobka.blog.backupper.Backupper"></bean> 

    <bean id="OldDataRemoval" class="net.babobka.blog.termination.OldDataRemoval"></bean> 

    <bean id="HeadHunterImport" class="net.babobka.blog.headHunter.HeadHunterImport"></bean> 



    <bean id="urlForwardController" 
     class="org.springframework.web.servlet.mvc.UrlFilenameViewController" /> 

    <bean id="tilesConfigurer" 
     class="org.springframework.web.servlet.view.tiles2.TilesConfigurer"> 
     <property name="definitions"> 
      <list> 
       <value>/WEB-INF/tiles.xml</value> 
      </list> 
     </property> 
    </bean> 

    <bean id="viewResolver" 
     class="org.springframework.web.servlet.view.UrlBasedViewResolver"> 
     <property name="viewClass" 
      value="org.springframework.web.servlet.view.tiles2.TilesView" /> 
    </bean> 

    <bean id="viewResolver1" 
     class="org.springframework.web.servlet.view.ResourceBundleViewResolver"> 
     <property name="order" value="1" /> 
     <property name="basename" value="views" /> 
    </bean> 



</beans>

来源

2013-10-22 Tony

哪条线是'MainFrame.java：29'？ –

'int eur =（int）converter.getRate（“EUR”，“RUB”）; //这是' – Tony

转换器是否应该被Spring注入？你可以测试它是否这样做？我从来没有调试过Spring，但肯定有一些方法可以做到这一点。它有适当的getter/setter方法吗？ –

属性施工后设置。尝试将Ctor的init代码移动到初始化方法。

例如

public class MainFrame() { 

    public MainFrame() {} 

    @PostConstruct 
    public void init() { 
     int eur = (int) converter.getRate("EUR", "RUB"); 
     .... 
    } 
}

来源

2013-10-22 15:21:38

摆动与春天的麻烦

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