大神指点： No matching bean of type [****.UserInfoService] found for dependency:

Posted 2023-03-01

SpringMVC+mybatis框架出现了差错
No matching bean of type [com.basic.readygo.service.UserInfoService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations:

package com.basic.readygo.service;
public interface UserInfoService
/**
* 根据前台传递的账户名和密码查询数据库，是否有木有相应的对象
* @author
* @param userAccount 用户账号
* @param userPassword 密码
* @return 用户信息对象
* */
public Object getObjByNameAndPwd(String username,String password);


package com.basic.readygo.service;

import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.basic.readygo.mapper.UserInfoMapper;
@Service("userInfoService")
public class UserInfoServiceImpl implements UserInfoService
@Resource
private UserInfoMapper userInfoMapper;
@Override
public Object getObjByNameAndPwd(String username, String password)
// TODO Auto-generated method stub
return userInfoMapper.getObjByNameAndPwd(username, password);



@Controller
@RequestMapping(value="/user")
public class UserInfoController

@Resource
private UserInfoService userInfoService;

//@RequestMapping(method = RequestMethod.POST)
@RequestMapping(value="/login")
public ModelAndView list(HttpServletRequest request)
System.out.println("administrator");
ModelAndView mav = new ModelAndView();
String username="admin";
String password="123456";
UserInfo userInfo=(UserInfo) userInfoService.getObjByNameAndPwd(username, password);

mav.setViewName("/user/ok");
return mav;


applicationContext.xml相应的配置
<!-- spring 自动注入bean -->
<context:annotation-config/>
<context:component-scan base-package="***.model"/>
<context:component-scan base-package="***.service"/>
<context:component-scan base-package="***.mapper"/>

出现这个错误是由于在执行sql的时候无法匹配sql语句的通配符造成的，有两个解决方法

具体步骤

org.apache.ibatis.binding.BindingException: Parameter 'username' not found. Available parameters are [0, 1, param1, param2]1

出现这个错误是由于在执行sql的时候无法匹配sql语句的通配符造成的，有两个解决方法。

1.在对应dao的xml文件的sql语句要这样写

<select id="findByUsernameAndPassword" resultType="com.lzcc.model.User">        select * from user where username = #0 and password = #1;</select>123

2.在dao接口的方法中的参数中添加@param注解

List<User> findByUsernameAndPassword(@Param("username") String username,@Param("password") String password) throws SQLException;1

3.如果上述两点都正常有可能是springmvc把静态资源给拦截了。要在springmvc的配置文件中加入以下代码：

<mvc:resources location="/images/" mapping="/images/**"/>  

<mvc:resources location="/js/" mapping="/js/**"/>  

<mvc:resources location="/css" mapping="/css/**"/>

参考技术A @Resource换成@Autowire追问

所有的@Resource吗？所有的@Resource换成@Autowire，我已经试过了，失败了。

参考技术B <context:component-scan base-package="com.basic.readygo"/>

<mvc:annotation-driven/>