Spring+JDBC，使用@Resource无效，使用Setter和Getter方式就可以获得实例

Question

请问大神们哪里错了，，，感觉是少jar包了，但是我加common-annotations.jar了、、纠结

报错：

 Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userDAO' defined in class path resource [applicationContext.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'dataSource' of bean class [com.daoImpl.UserDAOImpl]: Bean property 'dataSource' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1514)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1222)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at manger.Manger.main(Manger.java:18)
Caused by: org.springframework.beans.NotWritablePropertyException: Invalid property 'dataSource' of bean class [com.daoImpl.UserDAOImpl]: Bean property 'dataSource' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
    at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:1076)
    at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:927)
    at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:95)
    at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:75)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1510)
    ... 8 more

Spring的配置文件

 <?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

    <context:annotation-config />
    <!-- 配置数据库配置文件 -->
    <bean id="propertyConfigurer"
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:mysql.properties" />
    </bean>

    <!-- 配置数据源 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <property name="driverClassName" value="${jdbc.driver}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
    </bean>

    <bean id="userDAO" class="com.daoImpl.UserDAOImpl">
        <property name="dataSource" ref="dataSource" />
    </bean>
</beans>

main：

 package manger;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

import com.dao.UserDAO;
import com.pojo.User;

public class Manger {

    @SuppressWarnings("deprecation")
    public static void main(String[] args) {

        Resource resource = new ClassPathResource("applicationContext.xml");
        BeanFactory factory = new XmlBeanFactory(resource);
        UserDAO userDAO = (UserDAO) factory.getBean("userDAO");
        User user = new User();
        user.setPassword("aa");
        user.setUsername("hi");
        userDAO.insert(user);
    }
}

daoImpl

 package com.daoImpl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import javax.annotation.Resource;
import javax.sql.DataSource;
import com.dao.UserDAO;
import com.pojo.User;

public class UserDAOImpl implements UserDAO{

    @Resource(name="dataSource")
    private DataSource dataSource;

    public void insert(User user) {

        String sql="INSERT INTO user(username,password) VALUES (?,?)";
        try {
            Connection conn=dataSource.getConnection();
            PreparedStatement pstmt=conn.prepareStatement(sql);
            pstmt.setString(1,user.getUsername());
            pstmt.setString(2,user.getPassword());
            int row=pstmt.executeUpdate();
            System.out.println(row);

        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

}

dao：

 package com.dao;

import com.pojo.User;

public interface UserDAO {
    public void insert(User user);
}

Answer 1

private DataSource dataSource; 把get和set方法写上，试一下