Mybatis+Spring，服务未使用，但Dao为空

Question

Mybatis+Spring

当我在Junit Test中将一个Dao自动连接到服务并调用服务时，服务对象是完整的，但Dao对象为空。

springTest/springcontext-datasource.xml
-----------------------------------------------------------------------
<?xml version="1.0" encoding="gb18030"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/jdbc 
http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location">
<value>classpath:springTest/config.properties</value>
</property>
</bean>     
<!-- define the mysql dataSource -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${driverClassName}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
</bean> 
<!-- transaction manager -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<aop:config>  
<aop:advisor pointcut="execution(* com.service..*.*(..))" advice-ref="txAdvice"/>  
</aop:config>
<tx:advice id="txAdvice" transaction-manager="transactionManager">  
<tx:attributes>  
<tx:method name="get*" read-only="true"/>  
<tx:method name="find*" read-only="true"/>  
<tx:method name="*"  propagation="REQUIRED"/>  
</tx:attributes>  
</tx:advice>       
<!-- enable component scanning and autowire (beware that this does not enable mapper scanning!) -->    
<context:component-scan base-package="com.service" />
<!-- define the SqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="typeAliasesPackage" value="com.domain" />
<property name="mapperLocations" value="classpath*:com/dao/*.xml" />
</bean>
<!-- scan for mappers and let them be autowired -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.dao" />
</bean>
<bean id="productService" class="com.service.ProductService" >
</bean>
</beans>
DAO
-----------------------------------------------------------------------
package com.dao;
import com.domain.Author;
public interface AuthorMapper {
int deleteByPrimaryKey(Integer authorId);
}
domain
-----------------------------------------------------------------------
package com.domain;
public class Author {
private Integer authorId;
private String sourceId;
private String name;
private String personalName;
private Integer revision;
private String lastModified;
public Integer getAuthorId() {
return authorId;
}
public void setAuthorId(Integer authorId) {
this.authorId = authorId;
}
public String getSourceId() {
return sourceId;
}
public void setSourceId(String sourceId) {
this.sourceId = sourceId == null ? null : sourceId.trim();
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name == null ? null : name.trim();
}
public String getPersonalName() {
return personalName;
}
public void setPersonalName(String personalName) {
this.personalName = personalName == null ? null : personalName.trim();
}
public Integer getRevision() {
return revision;
}
public void setRevision(Integer revision) {
this.revision = revision;
}
public String getLastModified() {
return lastModified;
}
public void setLastModified(String lastModified) {
this.lastModified = lastModified == null ? null : lastModified.trim();
}
}
package com.service;
ProductService
-----------------------------------------------------------------------
@Service
public class ProductService{
@Autowired
private AuthorMapper authorMapper;
public Author selectAuthorByPrimaryKey(Integer authorId) {
Author author = null;
try{
System.out.println("authorMapper:"+authorMapper);
author = authorMapper.selectByPrimaryKey(authorId);
System.out.println("Author Obj:"+author);
return author;
}catch(Exception e){
log.info(e.getMessage()+" selectAuthorByPrimaryKey authorId:"+authorId);
}
return author;
}
}
package com.test;
ProductServiceTest
-----------------------------------------------------------------------
@ContextConfiguration(locations = {"classpath:springTest/springcontext-*.xml"})
@Controller
public class ProductServiceTest extends AbstractTransactionalJUnit4SpringContextTests {
@Autowired
private ProductService productService;
@Test
public void test01_selectAuthor(){
try{
System.out.println("productService:"+productService);
Author author = productService.selectAuthorByPrimaryKey(1);

}catch(Exception e){
e.printStackTrace();
}
}
}
AuthorMapper.xml
-----------------------------------------------------------------------
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.dao.AuthorMapper" >
<resultMap id="BaseResultMap" type="com.domain.Author" >
<id column="author_id" property="authorId" jdbcType="INTEGER" />
<result column="source_id" property="sourceId" jdbcType="VARCHAR" />
<result column="name" property="name" jdbcType="VARCHAR" />
<result column="personal_name" property="personalName" jdbcType="VARCHAR" />
<result column="revision" property="revision" jdbcType="INTEGER" />
<result column="last_modified" property="lastModified" jdbcType="VARCHAR" />
</resultMap>
<sql id="Base_Column_List" >
author_id, source_id, name, personal_name, revision, last_modified
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select 
<include refid="Base_Column_List" />
from author_t
where author_id = #{authorId,jdbcType=INTEGER}
</select>  
</mapper>
config.properties
-----------------------------------------------------------------------
driverClassName = com.mysql.jdbc.Driver
url = jdbc:mysql://localhost:3306/test
username =root
password =satish

author_t Table
-----------------------------------------------------------------------
CREATE TABLE `author_t` (
`author_id` int(15) NOT NULL AUTO_INCREMENT,
`source_id` varchar(15) NOT NULL,
`name` varchar(1000) NOT NULL,
`personal_name` varchar(1000) DEFAULT NULL,
`revision` int(3) DEFAULT NULL,
`last_modified` varchar(100) DEFAULT NULL,
PRIMARY KEY (`author_id`),
UNIQUE KEY `source_id` (`source_id`)
) ENGINE=InnoDB

OutPut Of Junit Test
----------------------------------------------------------------------
productService:com.service.ProductService@ee9867d
authorMapper:null
Author Obj:null

pom.xml
-----------------------------------------------------------------------
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.6.11</version>
</dependency>           
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>   
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>   
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>   
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>   
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>   
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>3.0.5.RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>       
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.0.5</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.0.1</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.17</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<dependency>
<groupId>commons-beanutils</groupId>
<artifactId>commons-beanutils-core</artifactId>
<version>1.8.3</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib-nodep</artifactId>
<version>2.2.2</version>
</dependency>
</dependencies>

Answer 1

要使用带注释的自动布线，应在applicationContext.xml 中包含<context:annotation-config/>