Java org.springframework.beans.NotWritablePropertyException：bean 类的无效属性“adminEmails”
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org.springframework.beans.NotWritablePropertyException: Invalid property 'adminEmails' of bean class
提问by Praveen Verma
I got stuck on this error given below:
我陷入了下面给出的这个错误：
Stack Trace
堆栈跟踪
Apr 16, 2014 12:21:23 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [beans.xml]
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'collectionsWithProps' defined in class path resource [beans.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'adminEmails' of bean class [com.student.spring.impl.CollectionsWithProps]: Bean property 'adminEmails' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1396)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1118)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at com.student.spring.test.MyTest.main(MyTest.java:26)
Caused by: org.springframework.beans.NotWritablePropertyException: Invalid property 'adminEmails' of bean class [com.student.spring.impl.CollectionsWithProps]: Bean property 'adminEmails' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:1064)
at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:924)
at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:76)
at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:58)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1393)
... 8 more
Here is my MyTest.java
这是我的MyTest.java
package com.student.spring.test;
import java.util.Properties;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import com.student.spring.impl.CollectionsWithProps;
@SuppressWarnings("deprecation")
public class MyTest {
public static void main(String[] args) {
Resource resource = new ClassPathResource("beans.xml");
BeanFactory beanFactory = new XmlBeanFactory(resource);
CollectionsWithProps cWP = (CollectionsWithProps) beanFactory
.getBean("collectionsWithProps");
System.out.println(cWP);
}
}
Here is CollectionsWithProps.java
这是CollectionsWithProps.java
package com.student.spring.impl;
import java.util.Properties;
public class CollectionsWithProps {
private Properties emails=null;
public Properties getEmails() {
return emails;
}
public void setEmails(Properties emails) {
this.emails = emails;
}
public String toString(){
return "College [Props=" + emails + "]";
}
}
Here is my beans.xml
这是我的beans.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" xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<bean id="collectionsWithProps" class="com.student.spring.impl.CollectionsWithProps">
<property name="adminEmails">
<props>
<prop key="admin">[email protected]</prop>
<prop key="support">[email protected]"></prop>
<prop key="hr">[email protected]</prop>
</props>
</property>
</bean>
</beans>
采纳答案by geoand
In beans.xmlyou are trying to set the field adminEmailsof CollectionsWithProps.
However the class doesn't have that field, it has the emailsfield.
在beans.xml您要设置字段adminEmails的CollectionsWithProps。但是该类没有该字段，它具有该emails字段。
Either fix beans.xmlto use emails instead of adminEmails, or fix the source code of CollectionsWithPropsbe renaming emailsto adminEmails(along with the getters and setters)
要么修复beans.xml使用电子邮件而不是adminEmails，要么修复CollectionsWithProps重命名emails为的源代码adminEmails（以及getter和setter）
回答by Himanshu Bhardwaj
There is property name mismatch:
属性名称不匹配：
private Properties emails=null;
should ideally be:
理想情况下应该是：
private Properties adminEmails=null;
getters and setters should be renamed accordingly. This will match with what you have mentioned in the configuration files.
getter 和 setter 应该相应地重命名。这将与您在配置文件中提到的内容相匹配。
回答by Vinodini Thambudurairaj
I had the same issue and it got resolved by just removing getter. As I required only setter for my application. Sometimes Spring gives this error.
我遇到了同样的问题，只需删除 getter 即可解决。因为我的应用程序只需要设置器。有时 Spring 会出现此错误。
