Question

这是我的情况： - /WEB-INF/spring/applicationContext.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:context="http://www.springframework.org/schema/context"
    xmlns:util="http://www.springframework.org/schema/util"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:jdbc="http://www.springframework.org/schema/jdbc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/util 
    http://www.springframework.org/schema/util/spring-util.xsd
    http://www.springframework.org/schema/aop 
    http://www.springframework.org/schema/aop/spring-aop.xsd
    http://www.springframework.org/schema/jdbc 
    http://www.springframework.org/schema/jdbc/spring-jdbc.xsd">  

    <context:annotation-config />

    <bean id="userDAO" class="com.test.repository.user.dao.impl.UserDAOImpl" />

</beans>

的web.xml

<display-name>Test</display-name>

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/spring/applicationContext.xml</param-value>
</context-param>

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

在UserDAOImpl：

@Log4j2 public class UserDAOImpl implements UserDAO { ... ... }

测试：

@RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(locations = { "classpath:*applicationContext.xml" })
 public class TestDAO{

@Autowired
UserDAO userDAO;

...

}

的pom.xml：

... org.springframework 春天上下文 $ {} springframework.version

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>${springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>${springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${springframework.version}</version>
        <scope>test</scope>
    </dependency>

...

错误：

没有'com.test.repository.user.dao.impl.UserDAO'类型的限定bean可用：预计至少有1个bean可以作为autowire候选者。依赖注释：{@ org.springframework.beans.factory.annotation.Autowired（required = true）}

Answer 1

除非您为UserDAOImpl定义了正确的软件包名称，否则我不会发现任何问题。我刚做了以下设置，它正在运行。

的applicationContext.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:context="http://www.springframework.org/schema/context"
    xmlns:util="http://www.springframework.org/schema/util"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:jdbc="http://www.springframework.org/schema/jdbc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/util
    http://www.springframework.org/schema/util/spring-util.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop.xsd
    http://www.springframework.org/schema/jdbc
    http://www.springframework.org/schema/jdbc/spring-jdbc.xsd">

    <context:annotation-config />

    <bean id="userDAO" class="com.mytest.UserDAOImpl" />

</beans>

UserDAO的

package com.mytest;

public interface UserDAO {
    public void mytest();
}

在UserDAOImpl

package com.mytest;
public class UserDAOImpl implements UserDAO {
    @Override
    public void mytest() {
        System.out.println("In MY test");
    }
}

TestDAO

package com.mytest;

    @RunWith(SpringJUnit4ClassRunner.class)
    @ContextConfiguration(locations = { "file:C://<fully qualified path>//applicationContext.xml" })
    public class TestDAO {
        @Autowired
        UserDAO userDAO;

        @Test
        public void testSysout(){
            userDAO.mytest();//prints "In MY test"
        }
    }

Spring - Autowired无法正常工作

1 个答案: