java从数据库有些字段的值无法取出来，详细问题见内容

[葱花鸡蛋]

1. applicationContext配置文件

<context:component-scan base-package="cn.fourinnovation.note"></context:component-scan>
	<mvc:annotation-driven></mvc:annotation-driven>

	<util:properties id="jdbc" location="classpath:jdbc.properties"></util:properties>
	
	<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
		<property name="driverClassName" value="#{jdbc.driver}"></property>
		<property name="url" value="#{jdbc.url}"></property>
		<property name="username" value="#{jdbc.user}"></property>
		<property name="password" value="#{jdbc.password}"></property>
	</bean>
	
	<bean id="sqlsessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource"/>
		<property name="mapperLocations" value="classpath:cn/fourinnovation/note/sql/*.xml"/>
	</bean>
	<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="cn.fourinnovation.note.dao"/>
	</bean>

2. service实现类代码

@Service
public class UserServiceImpl implements UserService {
	 @Autowired
	 private UserDao userDao;
	public NoteResult login(String email, String password) {
		NoteResult result=new NoteResult();
                //加密密码
		String pwd=NoteUtil.md5(password);
		User user=userDao.findByEmail(email);
		if(user==null){
			result.setStatus(1);
			result.setMsg("用户不存在");
		}else{
			if(user.getPassword().equals(pwd)){
				result.setStatus(0);
				result.setMsg("账号和密码正确");
				String token=NoteUtil.createToken();
				Map<String,Object> data=new HashMap<String,Object>();
				data.put("userToken", token);
                                //这里出了问题，user.getUserid()应该是有值的，但是它在这里却是null
				data.put("userId", user.getUserid());
				result.setData(data);
				System.out.println(data);
				userDao.updateToken(data);
			}else{
				result.setStatus(2);
				result.setMsg("密码不正确");
			}
		}
		return result;
	}

上面代码的第20行代码user.getUserid()输出为null，但我在数据库里对应字段是有值的，也就是没有取出来，我的问题也是出在这里。我可以取出密码用user.getPassword。
3. dao包里interface代码

public interface UserDao {
	public User findByEmail(String email);
	public int save(User user);
	public int updateToken(Map<String,Object> parameter);
	public String findUserId(String email);
}

4. Mapper配置文件代码

<mapper namespace="cn.fourinnovation.note.dao.UserDao">
	<select id="findByEmail" parameterType="string" resultType="cn.fourinnovation.note.bean.User">
		select * from user where email=#{email} 
	</select>
	<insert id="save" parameterType="cn.fourinnovation.note.bean.User">
		insert into user (email,password,user_id) values (#{email},#{password},#{userid})
	</insert>
	<update id="updateToken" parameterType="map">
		update user set usertoken=#{usertoken} where user_id=#{userid}
	</update>
	<select id="findUserId" parameterType="string" resultType="string">
		select user_id from user where email=#{email}
	</select>
</mapper>

5. User类代码

public class User implements Serializable {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	//邮箱
	private String email;
	//密码
	private String password;
	//用户序号
	private String userid;
	//用户口令
	private String usertoken;

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public String getUserid() {
		return userid;
	}

	public void setUserid(String userid) {
		this.userid = userid;
	}

	public String getUsertoken() {
		return usertoken;
	}

	public void setUsertoken(String usertoken) {
		this.usertoken = usertoken;
	}
	
}

6. NoteResult类代码

private int status;
	private String msg;
	private Object data;
	public int getStatus() {
		return status;
	}
	public void setStatus(int status) {
		this.status = status;
	}
	public String getMsg() {
		return msg;
	}
	public void setMsg(String msg) {
		this.msg = msg;
	}
	public Object getData() {
		return data;
	}
	public void setData(Object data) {
		this.data = data;
	}

7. 数据库的表结构

8. 项目的目录结构

9. 我后来在UserDao接口里又加了一个返回值是String类的方法，只取user_id就可以取出来，有人知道我的findByEmail方法为什么错了吗？

[追梦_沙]

好 很好 非常好