关于mybatis中@SelectProvider的一点疑惑

[utf7]

需求是这样的。假如有一个User表，表中字段有id,username,gender,email, address.....
现在使用mybatis中的@SelectProvider去实现查询逻辑，查询条件是自定义的Map<String,Object> query，query中放入查询的字段和值，假如我放置id，则根据id查询，假如放置username和id，则根据username和id查询，代码实现如下：

Usermapper代码：
public interface UserMapper {

@SelectProvider(type=UserMapperProvider.class,method="find")
public List<User> find(Map<String,Object> query);
}


UserMapperProvider代码：
import java.util.Map;
class UserMapperProvider{
public static String find(Map<String, Object> query) {
StringBuffer buffer = new StringBuffer();
buffer.append("SELECT * FROM user WHERE 1=1 ");

if(query.get("id")!=null){
buffer.append("AND id = #{id} ");
}
if(query.get("username")!=null){
buffer.append("AND username = #{id} ");
}
if(query.get("gender")!=null){
buffer.append("AND gender = #{gender} ");
}
if(query.get("email")!=null){
buffer.append("AND email = #{email} ");
}
return buffer.toString();
}
}


service层：
@Service("userService")
public class UserServiceImpl{
@Resource
private UserMapper userMapper;

/*
* 根据query条件，查询User
*
*/
public List<User> find(Map<String,Object> query) {
return userMapper.find(query);
}
}

问题是

@SelectProvider(type=UserMapperProvider.class,method="find")
public List<User> find(Map<String,Object> query);
好像有问题，这边的参数是如何传递的呢？当条件是Map<String,Object> query或者List或者自定义的时候，如果实现？

[utf7]

报错为：Caused by: java.lang.IllegalAccessException: Class org.apache.ibatis.builder.annotation.ProviderSqlSource can not access a member of class UserMapperProvider with modifiers ""

[romanitc]

表示没搞过mybatis！

[utf7]

有哪位大神知道的说一下啊

[yousite1]

userMapper应该这么写才对： @SelectProvider(type=UserMapperProvider.class,method="find") public List<User> find(@Param("id") Long id, @Param("username") Stirng username, @Param("gender") String gender, @Param("email") String email);