Spring mvc 如何捕获Springbean创建错误?
AdminService.javaSpring mvc 如何捕获Springbean创建错误?,spring-mvc,model-view-controller,spring-security,Spring Mvc,Model View Controller,Spring Security,AdminService.java package service; import java.awt.Window.Type; import java.util.HashMap; import javax.servlet.http.HttpSession; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Repository; impor
package service;
import java.awt.Window.Type;
import java.util.HashMap;
import javax.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;
import dao.IMemberDAO;
import model.Member;
@Service
public class MemberService
{
@Autowired
private IMemberDAO memberDao;
// 로그인
public HashMap<String, Object> login(String id,String pw)
{
HashMap<String, Object> result = memberDao.selectOne(id);
if(result != null) // 존재하는 값이 있으면
{
String opwd = (String) result.get("pw"); // opwd = 존재하는값의 pw값을 가져온 값
if(opwd.equals(pw))
{
return result; // true면 존재하는값을 반환
}
else
{
return null;
//return null; // 아니면 값을 반환하지 않음.
}
}
else // 존재하는 값이 없다면
{
return null;
}
}
// 아이디 체크
public boolean idCheck(String loginPerson)
{
HashMap<String, Object> user = memberDao.selectOne(loginPerson);
if(user != null)
{
return false;
}
else
{
return true;
}
}
// 멤버 추가
public boolean insertMember(Member member)
{
if(idCheck(member.getId()))
{
memberDao.insertMember(member);
return true;
}
else
{
return false;
}
}
public HashMap<String, Object> getMemberInfo(String id)
{
return memberDao.selectOne(id);
}
// 회원 수정
public void memberUpdate(HashMap<String, Object> params)
{
System.out.println("params is : " + params);
memberDao.updateMember(params);
}
// 회원삭제
public boolean memberDelete(String id,String pw)
{
HashMap<String, Object> user = memberDao.selectOne(id);
String pw2 = (String) user.get("pw");
System.out.println("id and pw is : " + id + "/" + pw);
System.out.println("pw2 is : " + pw2);
if(pw2.equals(pw))
{
memberDao.deleteMember(id);
System.out.println("return true");
return true;
}
else
{
System.out.println("return false");
return false;
}
}
}
我想到了错误的原因,
但我认为这是因为我没有插入服务注释
但是,没有任何拼写错误,所有内容都写对了,并且出现了错误。有什么我不知道的吗
你能告诉我是什么导致了这个错误吗
那么解决方案呢
请帮助我。尝试更改您的此代码:
@Autowired
public AdminService aService;
为此:
@Autowired
public AdminService adminService;
因为当你自动连线时,他看不到你上下文中的aService
,这就是为什么他不能创建adminService
的实例作为服务
bean的默认名称
编辑:
另一件事是,为了实例化bean,您必须实现一个具体类的接口,您不能实例化接口,所以您需要具体的bean来实现接口上的内容。像这样:
@Repository
public class IAdminDAOImpl implements IAdminDAO {
//Implementation here
}
@Service
public class AdminServiceImpl implements AdminService {
//Implementation here
}
我试着按照你告诉我的那样修改代码来运行这个项目,但它也导致了一个错误@LKTN.25我认为您应该将IAdminDAO实现为像IAdminDAOImpl这样的具体bean。并将@Service放在它上面,这样上下文将把它识别为Springbean,autowire将定位您的实现@LKTN.25现在您已经修改了代码,请检查下面的链接。
<?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:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.3.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
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-4.1.xsd">
<context:component-scan base-package="service" />
<bean class="org.springframework.jdbc.datasource.DriverManagerDataSource" id="dataSource">
<property value="com.mysql.jdbc.Driver" name="driverClassName"></property>
<property value="jdbc:mysql://localhost/rachelvf" name="url"></property>
<property value="root" name="username"/>
<property value="mysql" name="password"/>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="mapperLocations" value="classpath*:dao/mapper/*.xml"></property>
</bean>
<bean id="memberDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
<property name="mapperInterface" value="dao.IMemberDAO"></property>
</bean>
</beans>
<?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:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.3.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
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-4.1.xsd">
<context:component-scan base-package="service" />
<bean class="org.springframework.jdbc.datasource.DriverManagerDataSource" id="dataSource">
<property value="com.mysql.jdbc.Driver" name="driverClassName"></property>
<property value="jdbc:mysql://localhost/rachelvf" name="url"></property>
<property value="root" name="username"/>
<property value="mysql" name="password"/>
</bean>
<bean class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="mapperLocations" value="classpath:dao/mapper/*.xml"></property>
<property name="typeAliasesPackage" value="model"></property>
<property name="dataSource" ref="dataSource"></property>
</bean>
</beans>
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'adminService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private dao.IAdminDAO service.AdminService.adminDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [dao.IAdminDAO] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1210)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
@Autowired
public AdminService aService;
@Autowired
public AdminService adminService;
@Repository
public class IAdminDAOImpl implements IAdminDAO {
//Implementation here
}
@Service
public class AdminServiceImpl implements AdminService {
//Implementation here
}