具体错误如下： Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'testDao' is defined at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:694) at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1157) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:280) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:956) at test.Test.main(Test.java:15) 我的代码： 1.Dao层的实现类如下：

@Repository("testDao")
public class TestDaoImpl implements TestDao {
@Autowired
//使用配置文件中的JDBC模板
private JdbcTemplate JdbcTemplate;        
    @Override
    public int update(String sql, Object[] param) {
        // TODO Auto-generated method stub
        return JdbcTemplate.update(sql,param);
    }
    @Override
    public List<MyUser> query(String sql, Object[] param) {
        RowMapper<MyUser> rowMapper=new BeanPropertyRowMapper<MyUser>(MyUser.class);
        return JdbcTemplate.query(sql, rowMapper, param);
    }
}

2.applicationContext.xml文件配置如下：

<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:tx="http://www.springframework.org/schema/tx" 
    xmlns:jdbc="http://www.springframework.org/schema/jdbc"
    xmlns:task="http://www.springframework.org/schema/task" 
    xmlns:cache="http://www.springframework.org/schema/cache"
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/jdbc 
    http://www.springframework.org/schema/jdbc/spring-jdbc-4.1.xsd

        http://www.springframework.org/schema/task 
        http://www.springframework.org/schema/task/spring-task-4.1.xsd

        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-4.1.xsd

        http://www.springframework.org/schema/cache 
        http://www.springframework.org/schema/cache/spring-cache-4.1.xsd

        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx-4.1.xsd

        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-4.1.xsd">

<!-- 指定需要扫描的包，使注解生效 -->
<context:component-scan base-package="com.dao"/>

<!-- 1.配置数据源 -->
    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <!-- mysql.数据库驱动 -->
        <property name="driverClassName"
            value="com.mysql.jdbc.Driver"></property>
        <!-- 1.2.连接数据库的url -->
        <property name="url"
            value="jdbc:mysql://localhost:3306/springtest?characterEncoding=utf8"></property>
        <!-- 1.3.连接数据库的用户名 -->
        <property name="username" value="root"></property>
        <!-- 1.4.连接数据库的密码 -->
        <property name="password" value="123456"></property>
    </bean>

    <!-- 2配置JDBC模板 -->
    <bean id="jdbcTemplate"
        class="org.springframework.jdbc.core.JdbcTemplate">
        <!-- 默认必须使用数据源 -->
        <property name="dataSource" ref="dataSource"></property>
    </bean>

</beans>

3.测试类代码如下：

public class Test {
public static void main(String[] args) {
    ApplicationContext appCon=new ClassPathXmlApplicationContext("applicationContext.xml");
    TestDao td= (TestDao)appCon.getBean("testDao");
    //从容器中获取增强后的目标对象
    String insertSql = "insert into user values(null,?,?)";
    //数组param的值与insertSql中的？一一对应
    Object param1[]={"张三","男"};
    Object param2[]={"李四","女"};
    Object param3[]={"王二","男"};
    Object param4[]={"麻子","女"};
    //添加用户
    td.update(insertSql, param1);
    td.update(insertSql, param2);
    td.update(insertSql, param3);
    td.update(insertSql, param4);
    //查询用户
    String selectSql = "select*from user";
    List<MyUser> list = td.query(selectSql, null);
    for(MyUser mu:list){
        System.out.println(mu);
    }

}
}

新手自学，，，网上搜了好多没解决，希望大神指点