Spring 应用程序抛出 ArrayIndexOutOfBoundsException

Question

我是编程新手。当我运行程序时，程序抛出数组索引越界异常。使用 spring 和 java 进行编程。我正在主 class 中创建一个文本编辑器对象。错误在 SpellChecker 构造函数的系统输出 println 行。如果我从该行中删除 'a' 变量，则代码运行s 没有错误。主要 class:

public class MainApp {
public static void main(String[] args) {
    ApplicationContext context = new ClassPathXmlApplicationContext("Bean.xml");

    TextEditor te = (TextEditor)context.getBean("textEditor");
    te.spellCheck();
}

}

文本编辑器class:

public class TextEditor {
private SpellChecker spellChecker;

public TextEditor(SpellChecker spellChecker){
    System.out.println("Inside TestEditor constructor");
    this.spellChecker=spellChecker;
}
public void spellCheck(){
    spellChecker.checkSpelling();
}

}

拼写检查器class:

public class SpellChecker {
String a;

public SpellChecker(String a){
    this.a=a;
    System.out.println("Inside SpellChecker constructor " +a);
}

public void checkSpelling(){
    System.out.println("Inside checkSpelling");
}

}

XML:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

<bean id="textEditor" class="TextEditor">
    <constructor-arg ref="spellChecker"/>
</bean>

<bean id="spellChecker" class="SpellChecker">
    <constructor-arg type="java.lang.String" value="raviya"/>
</bean>

堆栈跟踪：

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 24882 out of bounds for length 1064
at org.springframework.asm.ClassReader.<init>(Unknown Source)
at org.springframework.asm.ClassReader.<init>(Unknown Source)
at org.springframework.asm.ClassReader.<init>(Unknown Source)
at org.springframework.core.LocalVariableTableParameterNameDiscoverer.inspectClass(LocalVariableTableParameterNameDiscoverer.java:112)
at org.springframework.core.LocalVariableTableParameterNameDiscoverer.getParameterNames(LocalVariableTableParameterNameDiscoverer.java:86)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:188)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:984)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:888)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:479)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450)
at org.springframework.beans.factory.support.AbstractBeanFactory.getObject(AbstractBeanFactory.java:290)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:189)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:322)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:106)
at org.springframework.beans.factory.support.ConstructorResolver.resolveConstructorArguments(ConstructorResolver.java:600)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:140)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:984)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:888)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:479)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450)
at org.springframework.beans.factory.support.AbstractBeanFactory.getObject(AbstractBeanFactory.java:290)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:189)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:562)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:871)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:423)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at MainApp.main(MainApp.java:6)

Answer 1

你应该：

在SpellChecker中添加setA()方法class
修改XML以这种方式设置字段的值

  <bean id="spellChecker" class="SpellChecker">
       <property name="a" value="raviya"/>
   </bean>

您正在通过 setter 注入将值注入字段。您可以阅读更多内容，例如 here and in the Spring documentation.

Spring 应用程序抛出 ArrayIndexOutOfBoundsException

Spring application throws an ArrayIndexOutOfBoundsException

java

spring

javabeans