java开发，myeclipse+mysql

QwertyuiopQQQQ1 2019-06-11 04:38:14

请问图中xml文件两处找不到类的错误，怎么弄？求助大神

applicationContext.xml代码：
<?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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/sqltest"></property>
<property name="username" value="root"></property>
<property name="password" value="123456"></property>
</bean>

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean>

<bean id="userDao" class="UserDao">
<property name="jdbcTemplate" ref="jdbcTemplate"></property>
</bean>

<bean id="LoginController" class="LoginController">
<property name="userDao" ref="userDao"></property>
</bean>

<bean id="mapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>

<prop key="login.do">LoginController</prop>
</props>
</property>
</bean>
</beans>

LoginController.java代码：
package com.login;

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;

public class LoginController implements Controller {
private UserDao userDao;
@SuppressWarnings("unchecked")
public ModelAndView handleRequest(HttpServletRequest request,
HttpServletResponse response) throws Exception {
// TODO Auto-generated method stub
String userName=request.getParameter("userName");
String userPwd=request.getParameter("userPwd");

Map model=new HashMap();

UserVO userVO=userDao.selectByName(userName, userPwd);

if(userVO != null){
model.put("userVO", userVO);
return new ModelAndView("WEB-INF/Main.jsp",model);
}else{
model.put("error", "用户名或密码不匹配");
return new ModelAndView("WEB-INF/index.jsp",model);
}

}
public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}
public UserDao getUserDao() {
return userDao;
}

}

UserDao.java代码：

package com.login;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.simple.ParameterizedBeanPropertyRowMapper;

public class UserDao implements UserDaoImp {
private JdbcTemplate jdbcTemplate;

/*
* 查询所有的数据信息
* (non-Javadoc)
* @see UserDAOInterface#find()
*/
public List find(){
String sql="select * from userinfo";
return jdbcTemplate.query(sql, new UserMapper());
}
/*
*
* 使用rowMapper 19行用到，因为query方法不能直接放回一个数组，所以我们只能通过rowMapper赋值给uservo;
*
* RowMapper可以将数据中的每一行封装成用户定义的类，在数据库查询中，如果返回的类型是用户自定义的类型则需要包装
*/
private static final class UserMapper implements RowMapper{

public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
// TODO Auto-generated method stub
UserVO uservo=new UserVO();
uservo.setId(rs.getInt("id"));
uservo.setName(rs.getString("name"));
uservo.setPwd(rs.getString("pwd"));
return uservo;
}

}
/*
* 删除信息
* (non-Javadoc)
* @see UserDAOInterface#delete(int)
*/
public void delete(int id) {
// TODO Auto-generated method stub
String sql="delete from userinfo where id=?";
jdbcTemplate.update(sql,id);
}
/*
* 增加信息
* (non-Javadoc)
* @see UserDAOInterface#insert(UserVO)
*/
public void insert(UserVO uservo) {
// TODO Auto-generated method stub
String sql=" insert into userinfo (name,pwd) values(?,?)";
jdbcTemplate.update(sql,new Object[]{
uservo.getName(),uservo.getPwd()
});
}
/*
* 查询信息
* (non-Javadoc)
* @see UserDAOInterface#select(int)
*/
public UserVO select(int id) {
// TODO Auto-generated method stub
String sql="select * from userinfo where id=?";
return jdbcTemplate.queryForObject(sql, ParameterizedBeanPropertyRowMapper.newInstance(UserVO.class),id);

}
public UserVO selectByName(String name,String pwd){
// TODO Auto-generated method stub
String sql="select * from userinfo where name=? and pwd=?";
return jdbcTemplate.queryForObject(sql, ParameterizedBeanPropertyRowMapper.newInstance(UserVO.class),name,pwd);

}
/*
* 更新信息
* (non-Javadoc)
* @see UserDAOInterface#update(UserVO)
*/
public void update(UserVO uservo) {
// TODO Auto-generated method stub
String sql="update user set name=?,pwd=? where id=?";
jdbcTemplate.update(sql,uservo.getName(),uservo.getPwd(),uservo.getId());
}
public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}
public JdbcTemplate getJdbcTemplate() {
return jdbcTemplate;
}
}

UserDaolmp.java代码：

package com.login;

import java.util.List;

import sun.org.mozilla.javascript.internal.InterfaceAdapter;

public interface UserDaoImp{
public void insert(UserVO uservo);
public void delete(int id);
public void update(UserVO uservo);
public UserVO select(int id);
public List find();
public UserVO selectByName(String name,String pwd);
}

错误信息：

信息: Initializing Spring FrameworkServlet 'spring'
2019-6-11 16:11:55 org.apache.catalina.core.ApplicationContext log
严重: StandardWrapper.Throwable
org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [UserDao] for bean with name 'userDao' defined in ServletContext resource [/WEB-INF/classes/applicationContext.xml]; nested exception is java.lang.ClassNotFoundException: UserDao
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1250)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:576)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1319)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:885)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:562)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:442)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:458)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:339)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:306)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:127)
at javax.servlet.GenericServlet.init(GenericServlet.java:212)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1161)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:806)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassNotFoundException: UserDao
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1358)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
at org.springframework.util.ClassUtils.forName(ClassUtils.java:257)
at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:408)
at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1271)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1242)
... 24 more
2019-6-11 16:11:55 org.apache.catalina.core.StandardWrapperValve invoke
严重: Allocate exception for servlet spring
java.lang.ClassNotFoundException: UserDao
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1358)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
at org.springframework.util.ClassUtils.forName(ClassUtils.java:257)
at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:408)

at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1242)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:576)
at or