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[英]No primary or default constructor found for interface org.springframework.data.jpa.domain.Specification] with root cause
[英]mongodb org.springframework.data.authentication.UserCredentials No default constructor found
我剛剛開始將mongodb用作新項目的存儲庫,直到我們決定在mongo服務器中設置用戶身份驗證之前,一切都OK。
我如下更改我的spring.config.xml以通過身份驗證連接到mongo
<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
<constructor-arg name="mongo" ref="mongo"/>
<constructor-arg name="databaseName" value="admin"/>
<constructor-arg name="userCredentials" ref="mongoCredentials"/>
</bean>
<bean id="mongoCredentials" class="org.springframework.data.authentication.UserCredentials">
<property name="username" value="user" />
<property name="password" value="password" />
</bean>
<bean class="com.mongodb.MongoURI" id="mongoURI">
<constructor-arg value="mongodb://localhost:27017" />
</bean>
<bean class="com.mongodb.Mongo" id="mongo">
<constructor-arg ref="mongoURI" />
</bean>
這是堆棧跟蹤:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoTemplate' defined in class path resource [spring-config.xml]: Cannot resolve reference to bean 'mongoCredentials' while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoCredentials' defined in class path resource [spring-config.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.authentication.UserCredentials]: No default constructor found; nested exception is java.lang.NoSuchMethodException: org.springframework.data.authentication.UserCredentials.<init>()
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:359)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:108)
at org.springframework.beans.factory.support.ConstructorResolver.resolveConstructorArguments(ConstructorResolver.java:648)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:140)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1143)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at com.tosan.test.Test.main(Test.java:27)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoCredentials' defined in class path resource [spring-config.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.authentication.UserCredentials]: No default constructor found; nested exception is java.lang.NoSuchMethodException: org.springframework.data.authentication.UserCredentials.<init>()
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1105)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1050)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:351)
... 17 more
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.authentication.UserCredentials]: No default constructor found; nested exception is java.lang.NoSuchMethodException: org.springframework.data.authentication.UserCredentials.<init>()
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:85)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1098)
... 25 more
Caused by: java.lang.NoSuchMethodException: org.springframework.data.authentication.UserCredentials.<init>()
at java.lang.Class.getConstructor0(Class.java:3082)
at java.lang.Class.getDeclaredConstructor(Class.java:2178)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:80)
... 26 more
pom.xml的一部分:
<properties>
<spring.version>4.2.4.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>com.ibm.icu</groupId>
<artifactId>icu4j</artifactId>
<version>57.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb</artifactId>
<version>1.8.2.RELEASE</version>
</dependency>
我感謝您的幫助。
嘗試這個:
<bean id="mongoCredentials" class="org.springframework.data.authentication.UserCredentials">
<constructor-arg value="user"></constructor-arg>
<constructor-arg value="password"></constructor-arg>
通過配置方式,Spring嘗試調用默認構造函數,然后調用setter。 但是當然沒有默認的構造函數,因此Spring報告異常
UserCredentials類沒有默認構造,它具有一個帶有以下參數的構造: UserCredentials(String username, String password)
。 您必須修改bean定義才能使用此構造函數:
<bean id="mongoCredentials" class="org.springframework.data.authentication.UserCredentials">
<constructor-arg value="user" />
<constructor-arg value="password" />
</bean>
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