新人！SpringMVC+myBatis编写登录模块，运行时网页报错500_Java Web开发

新人求助！SpringMVC+myBatis编写登录模块，运行时网页报错500.
错误信息如下：
2015-9-4 9:41:01 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [spring] in context with path [/last] threw exception [Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.last.dao.impl.UserDaoIMP.selectUser] with root cause
org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.last.dao.impl.UserDaoIMP.selectUser
at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:189)
at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:43)
at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:58)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:51)
at $Proxy6.selectUser(Unknown Source)
at com.last.service.UserService.selectUser(UserService.java:21)
at com.last.controller.LoginController.handleRequest(LoginController.java:27)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:844)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:957)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2516)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2505)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:619)

UserDaoIMP.xml
代码如下：
<?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.last.IMP.UserDaoIMP">
        <select id="selectUser" parameterType="com.last.vo.UserVO" resultType="com.last.vo.UserVO">
            select * from user where name=#{name} and pwd=#{pwd}
        </select>
        <insert id="insertUser" parameterType="com.last.vo.UserVO" flushCache="true">
            insert into user(name,pwd) values(#{name},#{pwd})
        </insert>
        <update id="updateUser" parameterType="com.last.vo.UserVO">
            update user set name=#{name} where id=#{id}
        </update>
        <delete id="deleteUser" parameterType="int">
            delete from user where id=#{id}
        </delete>
    </mapper>

UserDaoIMP.java
代码如下：
package com.last.dao.impl;

import com.last.vo.UserVO;

public interface UserDaoIMP {
  public UserVO selectUser(UserVO uservo);
  public int insertUser(UserVO uservo);
  public int updateUser(UserVO uservo);
  public int deleteUserById(int id);
}

LoginController.java
代码如下：
package com.last.controller;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

import com.last.service.UserService;
import com.last.vo.UserVO;

public class LoginController implements Controller {
    private UserService userService;
    public ModelAndView handleRequest(HttpServletRequest request,
            HttpServletResponse response) throws Exception {
        // TODO Auto-generated method stub
        String name=request.getParameter("userName");
        String password=request.getParameter("password");
        //System.out.println("name-----"+name+"----password-----"+password);
        UserVO uservo=new UserVO();
        uservo.setName(name);
        uservo.setPwd(password);
        Map<String, Object> model=new HashMap<String, Object>();
        if(userService.selectUser(uservo)!=null){
            uservo=userService.selectUser(uservo);
            System.out.println("能查到信息");
            model.put("uservo", uservo);
            return new ModelAndView("WEB-INF/Main.jsp",model);
        }else{
            System.out.println("查不到信息");
            model.put("error", "用户名或密码错误");
            return new ModelAndView("WEB-INF/Login.jsp",model);
        }

    }
    public void setUserService(UserService userService) {
        this.userService = userService;
    }
    public UserService getUserService() {
        return userService;
    }

}

------解决思路----------------------
很明显啊，

哥们你的包路径不对，请注意下面红色部分：

错误信息如下：
2015-9-4 9:41:01 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [spring] in context with path [/last] threw exception [Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.last.dao.impl.UserDaoIMP.selectUser] with root cause
org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.last.dao.impl.UserDaoIMP.selectUser

中的
com.last.dao.impl.UserDaoIMP和下面xml文件中的
com.last.IMP.UserDaoIMP不一致

<?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.last.IMP.UserDaoIMP">  
        <select id="selectUser" parameterType="com.last.vo.UserVO" resultType="com.last.vo.UserVO">  
            select * from user where name=#{name} and pwd=#{pwd}  
        </select>  
        <insert id="insertUser" parameterType="com.last.vo.UserVO" flushCache="true">  
            insert into user(name,pwd) values(#{name},#{pwd})  
        </insert>  
        <update id="updateUser" parameterType="com.last.vo.UserVO">  
            update user set name=#{name} where id=#{id}  
        </update>  
        <delete id="deleteUser" parameterType="int">  
            delete from user where id=#{id}  
        </delete>  
    </mapper>