Question

mybatis SqlSession session = sqlSessionFactory.openSession(); 报空指针异常

@Controller
@RequestMapping("/article")
public class UserController {
@Autowired
IUserOperation userMapper;

SqlSessionFactory sqlSessionFactory;

Reader reader;

{
try{
reader = Resources.getResourceAsReader("Configuration.xml");
sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
}catch(Exception e){
e.printStackTrace();
}
}

public SqlSessionFactory getSession(){
return sqlSessionFactory;
}

@RequestMapping("/main.do")
public ModelAndView main(HttpServletRequest request,HttpServletResponse response){
ModelAndView mav=new ModelAndView("main");
return mav;
}

@RequestMapping("/adduser.do")
public void add(HttpServletRequest request,HttpServletResponse response){

String name = request.getParameter("name");
String age = request.getParameter("age");
String address = request.getParameter("address");

User user = new User();
user.setUserName(name);
user.setUserAge(age);
user.setUserAddress(address);

SqlSession session = sqlSessionFactory.openSession(); !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

try {
userMapper.addUser(user);
session.commit();
} finally {
session.close();
}

}

}
代码如下。！！！！！！！！！！！！！那行报空指针。求高手解答

Answer 1

你得先把创建sqlSessionFactory那段代码放入static代码块里面吧 保证在类初始化的时候就创建好sqlSessionFactory， 还有一种原因就是你没有导入mybatis的jar包