无法查询 findOne - SpringMVC MongoDB

Posted 2023-04-18

【中文标题】无法查询 findOne - SpringMVC MongoDB

【英文标题】：unable to query findOne - SpringMVC MongoDB

【发布时间】：2018-01-21 04:01:30

【问题描述】：

我正在尝试登录但无法登录，因为 findOne 查询在 DAO 实现中失败。我放了一系列 system.out.println 看看哪里出错了。

我明白了

email: abcdef Password : 123123

email2: abcdef Password2: 123123

check 1

check 2

由于某种原因，程序无法到达检查 3、检查 4 和内部 if 条件 where user != null。

我尝试了 mongoTemplate，mongoOperations，使用 addCriteria 没有标准但没有运气。

代码：UserDaoImplementation

import com.mthree.model.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.UUID;

import static org.springframework.data.mongodb.core.query.Criteria.where;
import static org.springframework.data.mongodb.core.query.Query.query;

@Repository
@Service(value = "userDao")
public class UserDaoImpl implements UserDao 

    @Autowired
    MongoTemplate mongoTemplate;
    private static final String COLLECTION_NAME = "user";

    public List<User> listUser() 
        return mongoTemplate.findAll(User.class, COLLECTION_NAME);
    

    public void add(User user) 
        if(!mongoTemplate.collectionExists(User.class))
            mongoTemplate.createCollection(User.class);
        
        user.setId(UUID.randomUUID().toString());
        mongoTemplate.insert(user, COLLECTION_NAME);
    

    public void update(User user) 
        mongoTemplate.save(user);
    

    public void delete(User user) 
        mongoTemplate.remove(user, COLLECTION_NAME);
    

    public User findUserById(String id) 
        return mongoTemplate.findById(id, User.class);
    

    @Override
    public User login(String Email, String Password) 

        System.out.println("email2: "+ Email + " Password2: "+ Password);
        try 

            System.out.println("check 1");

            Query query = new Query();

            System.out.println("check 2");

           // User user = mongoTemplate
             //       .findOne(query.addCriteria(Criteria.where("Email").is(Email)), User.class, COLLECTION_NAME);

            User user = mongoTemplate.findOne(query(where("Email").is(Email)), User.class,COLLECTION_NAME);
            System.out.println("check 3");

            if(user != null)
                //return user;
                System.out.println("check 4");

                System.out.println("password3: "+ Password + " Password4: "+ user.getPassword());
                BCryptPasswordEncoder bCryptPasswordEncoder = new BCryptPasswordEncoder();
                // t y
                if(bCryptPasswordEncoder.matches(Password, user.getPassword())) 
                    return user;
                
            

            return null;

        catch (Exception e)
            return null;
        
    

    @Override
    public void register(User user) 

        mongoTemplate.insert(user);
    

    @Override
    public void changeProfile(User user) 

        mongoTemplate.save(user);
    

控制器

@RequestMapping(value="/login", method= RequestMethod.POST)
    public String login(@ModelAttribute("user") User user, HttpSession session, ModelMap modelMap)

         //simply checking the values my password is not yet encrypted
        System.out.println("email: "+ user.getEmail() + " Password : "+ user.getPassword());
        User user2 = userService.login(user.getEmail(), user.getPassword());
        if(user2 == null)
            modelMap.put("error", "Invalid User");
            return "account/login";
        else
            session.setAttribute("username", user.getFirstname());
            return "account/welcome";
        
        //BCryptPasswordEncoder bCryptPasswordEncoder = new BCryptPasswordEncoder();
        //user.setPassword(bCryptPasswordEncoder.encode(user.getPassword()));
       // userService.register(user);

        //return "redirect:../login";
    

用户 - 模型

导入 org.springframework.data.annotation.Id; 导入 org.springframework.data.mongodb.core.mapping.Document；

@文档 公共类用户

@Id
private String id;
private long UserId;
private String Firstname;
private String Lastname;
private String Email;
private String Password;
private String Role;
private long CountryCode;
private long MobileNumber;
private String City;
private String Address;

public User()
    super();


public User(String id, long userId, String firstname, String lastname, String email, String password, String role, long countryCode, long mobileNumber, String city, String address) 
    super();
    this.id = id;
    this.UserId = userId;
    this.Firstname = firstname;
    this.Lastname = lastname;
    this.Email = email;
    this.Password = password;
    this.Role = role;
    this.CountryCode = countryCode;
    this.MobileNumber = mobileNumber;
    this.City = city;
    this.Address = address;



public String getId() 
    return id;


public void setId(String id) 
    this.id = id;


public long getUserId() 
    return UserId;


public void setUserId(long userId) 
    this.UserId = userId;


public String getFirstname() 
    return Firstname;


public void setFirstname(String firstname) 
    this.Firstname = firstname;


public String getLastname() 
    return Lastname;


public void setLastname(String lastname) 
    this.Lastname = lastname;


public String getEmail() 
    return Email;


public void setEmail(String email) 
    this.Email = email;


public String getPassword() 
    return Password;


public void setPassword(String password) 
    this.Password = password;


public String getRole() 
    return Role;


public void setRole(String role) 
    this.Role = role;


public long getCountryCode() 
    return CountryCode;


public void setCountryCode(long countryCode) 
    this.CountryCode = countryCode;


public long getMobileNumber() 
    return MobileNumber;


public void setMobileNumber(long mobileNumber) 
    this.MobileNumber = mobileNumber;


public String getCity() 
    return City;


public void setCity(String city) 
    this.City = city;


public String getAddress() 
    return Address;


public void setAddress(String address) 
    this.Address = address;

堆栈跟踪

e: org.springframework.data.mapping.context.InvalidPersistentPropertyPath: No property email found on com.mthree.model.User!
org.springframework.data.mapping.context.InvalidPersistentPropertyPath: No property email found on com.mthree.model.User!
    at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentPropertyPath(AbstractMappingContext.java:257)
    at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentPropertyPath(AbstractMappingContext.java:230)
    at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentPropertyPath(AbstractMappingContext.java:205)
    at org.springframework.data.mongodb.core.convert.QueryMapper$MetadataBackedField.getPath(QueryMapper.java:867)
    at org.springframework.data.mongodb.core.convert.QueryMapper$MetadataBackedField.<init>(QueryMapper.java:758)
    at org.springframework.data.mongodb.core.convert.QueryMapper$MetadataBackedField.<init>(QueryMapper.java:735)
    at org.springframework.data.mongodb.core.convert.QueryMapper.createPropertyField(QueryMapper.java:231)
    at org.springframework.data.mongodb.core.convert.QueryMapper.getMappedObject(QueryMapper.java:129)
    at org.springframework.data.mongodb.core.MongoTemplate.doFind(MongoTemplate.java:1760)
    at org.springframework.data.mongodb.core.MongoTemplate.doFind(MongoTemplate.java:1750)
    at org.springframework.data.mongodb.core.MongoTemplate.find(MongoTemplate.java:624)
    at org.springframework.data.mongodb.core.MongoTemplate.findOne(MongoTemplate.java:589)
    at org.springframework.data.mongodb.core.MongoTemplate.findOne(MongoTemplate.java:581)
    at com.mthree.dao.UserDaoImpl.login(UserDaoImpl.java:67)
    at com.mthree.service.UserServiceImpl.login(UserServiceImpl.java:38)
    at com.mthree.controller.HomeController.login(HomeController.java:76)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    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.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1115)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2549)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2538)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

【问题讨论】：

您可以共享任何异常或完整堆栈跟踪吗？

in query(where("Email").is(Email) "Email" 指的是一个属性，因此应该是"email"。

@JensSchauder no "email" 没有成功。检查我的用户模型。

@DanielC。我添加了一个堆栈跟踪，看看它。

在您的 catch 块中，您没有打印堆栈跟踪。尝试 e.printStacktrace() 并再次发布结果。您添加的 Stacktrace 只是您的应用程序启动时的日志。

【参考方案1】：

使用正确的 Java (Beans) 命名约定：

CamelCase 首字母小写：

public User(String id, long userId, String firstname, String lastname, String email, String password, String role, long countryCode, long mobileNumber, String city, String address) 

  super();
  this.id = id;
  this.userId = userId;
  this.firstname = firstname;
  this.lastname = lastname;
  this.email = email;
  this.password = password;
  this.role = role;
  this.countryCode = countryCode;
  this.mobileNumber = mobileNumber;
  this.city = city;
  this.address = address;

Getter 和 Setter 应该是第一个字母大写的字段名称，前缀为 get 或 set（如果存在）。

查询/字符串中引用的属性与字段名称相同。

注意：实际的 Java Beans 规范存在一些偏差，例如没有默认构造函数的选项。