Cannot invoke "java.util.Map.containsKey(Object)" because "requestMap" is null

padde479

padde479

Bekanntes Mitglied
Wenn ich meinen UserServieImpl ausführe, bekomme ich immer eine Exception, dass meine requestMap null ist. Ich kann mir aber nicht erklären, warum die requestMap nulll ist. Diese sind meine Implementierungen:

Java: 
package com.inn.cafe.rest;

import java.util.Map;

import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@RequestMapping(path = "/user", method = {RequestMethod.GET, RequestMethod.POST})
public interface UserRest {
    @PostMapping(path = "/signup")
    public ResponseEntity<String> signup(@RequestBody(required = false) Map<String, String> requestMap);
}

Java: 
package com.inn.cafe.restImpl;

import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RestController;

import com.inn.cafe.constents.CafeConstants;
import com.inn.cafe.rest.UserRest;
import com.inn.cafe.service.UserService;
import com.inn.cafe.utils.CafeUtils;

@RestController
public class UserRestImpl implements UserRest {

    @Autowired
    UserService userService;

    @Override
    public ResponseEntity<String> signup(Map<String, String> requestMap) {
        try {
            userService.signup(requestMap);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return CafeUtils.getResponseEntity(CafeConstants.SOMETHING_WENT_WRONG, HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

Java: 
package com.inn.cafe.service;
import java.util.Map;
import org.springframework.http.ResponseEntity;

public interface UserService {

    ResponseEntity<String> signup(Map<String, String> requestMap);
}

Java: 
package com.inn.cafe.serviceImpl;

import java.util.Map;
import java.util.Objects;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;

import com.inn.cafe.POJO.User;
import com.inn.cafe.constents.CafeConstants;
import com.inn.cafe.dao.UserDao;
import com.inn.cafe.service.UserService;
import com.inn.cafe.utils.CafeUtils;

import lombok.extern.slf4j.Slf4j;

@Slf4j
@Service
public class UserServiceImpl implements UserService {

    @Autowired
    UserDao userDao;

    @Override
    public ResponseEntity<String> signup(Map<String, String> requestMap) {
        log.info("Inside signup");
        try {
            if (validateSignupMap(requestMap)) {
                User user = userDao.findByEmailId(requestMap.get("email"));
                if (Objects.isNull(user)) {
                    userDao.save(getUserFromMap(requestMap));
                    return CafeUtils.getResponseEntity("Successfully Registered", HttpStatus.OK);
                } else {
                    return CafeUtils.getResponseEntity("Email already exists", HttpStatus.BAD_REQUEST);
                }
            } else
                return CafeUtils.getResponseEntity(CafeConstants.INVALID_DATA, HttpStatus.BAD_REQUEST);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return CafeUtils.getResponseEntity(CafeConstants.SOMETHING_WENT_WRONG, HttpStatus.INTERNAL_SERVER_ERROR);
    }

    private boolean validateSignupMap(Map<String, String> requestMap) {
        if (requestMap.containsKey("name") && requestMap.containsKey("contactNumber") && requestMap.containsKey("email")
                && requestMap.containsKey("password"))
            return true;
        else
            return false;
    }

    private User getUserFromMap(Map<String, String> requestMap) {
        User user = new User();
        user.setName(requestMap.get("name"));
        user.setContactNumber(requestMap.get("contactNumber"));
        user.setEmail(requestMap.get("email"));
        user.setPassword(requestMap.get("password"));
        user.setStatus("false");
        user.setRole("user");
        return user;
    }
}

Java: 
package com.inn.cafe.dao;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.repository.query.Param;

import com.inn.cafe.POJO.User;

public interface UserDao extends JpaRepository<User, Integer> {
    User findByEmailId(@Param("email") String email);
}

Meine Exception lautet dann

Code: 
  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v3.1.2)

2023-08-09T18:14:20.531+02:00  INFO 1524 --- [           main] c.i.c.CafeManagementSystemApplication    : Starting CafeManagementSystemApplication using Java 18.0.1.1 with PID 1524 (C:\Users\Downloads\com.inn.cafe\target\classes started by in C:\Users\Downloads\com.inn.cafe)
2023-08-09T18:14:20.533+02:00  INFO 1524 --- [           main] c.i.c.CafeManagementSystemApplication    : No active profile set, falling back to 1 default profile: "default"
2023-08-09T18:14:21.100+02:00  INFO 1524 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2023-08-09T18:14:21.161+02:00  INFO 1524 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 51 ms. Found 1 JPA repository interfaces.
2023-08-09T18:14:21.740+02:00  INFO 1524 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2023-08-09T18:14:21.749+02:00  INFO 1524 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2023-08-09T18:14:21.749+02:00  INFO 1524 --- [           main] o.apache.catalina.core.StandardEngine    : Starting Servlet engine: [Apache Tomcat/10.1.11]
2023-08-09T18:14:21.843+02:00  INFO 1524 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2023-08-09T18:14:21.844+02:00  INFO 1524 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1265 ms
2023-08-09T18:14:21.972+02:00  INFO 1524 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
2023-08-09T18:14:22.019+02:00  INFO 1524 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 6.2.6.Final
2023-08-09T18:14:22.022+02:00  INFO 1524 --- [           main] org.hibernate.cfg.Environment            : HHH000406: Using bytecode reflection optimizer
2023-08-09T18:14:22.148+02:00  INFO 1524 --- [           main] o.h.b.i.BytecodeProviderInitiator        : HHH000021: Bytecode provider name : bytebuddy
2023-08-09T18:14:22.261+02:00  INFO 1524 --- [           main] o.s.o.j.p.SpringPersistenceUnitInfo      : No LoadTimeWeaver setup: ignoring JPA class transformer
2023-08-09T18:14:22.274+02:00  INFO 1524 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2023-08-09T18:14:22.402+02:00  INFO 1524 --- [           main] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Added connection com.mysql.cj.jdbc.ConnectionImpl@23b1aa9
2023-08-09T18:14:22.403+02:00  INFO 1524 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2023-08-09T18:14:22.425+02:00  WARN 1524 --- [           main] org.hibernate.orm.deprecation            : HHH90000026: MySQL8Dialect has been deprecated; use org.hibernate.dialect.MySQLDialect instead
2023-08-09T18:14:22.590+02:00  INFO 1524 --- [           main] o.h.b.i.BytecodeProviderInitiator        : HHH000021: Bytecode provider name : bytebuddy
2023-08-09T18:14:23.040+02:00  INFO 1524 --- [           main] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2023-08-09T18:14:23.254+02:00  INFO 1524 --- [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2023-08-09T18:14:23.468+02:00  INFO 1524 --- [           main] o.s.d.j.r.query.QueryEnhancerFactory     : Hibernate is in classpath; If applicable, HQL parser will be used.
2023-08-09T18:14:23.606+02:00  WARN 1524 --- [           main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2023-08-09T18:14:23.859+02:00  INFO 1524 --- [           main] o.s.s.web.DefaultSecurityFilterChain     : Will secure any request with [org.springframework.security.web.session.DisableEncodeUrlFilter@68a1bb31, org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@344f4a82, org.springframework.security.web.context.SecurityContextHolderFilter@7a79a5d6, org.springframework.security.web.header.HeaderWriterFilter@2a728076, org.springframework.security.web.authentication.logout.LogoutFilter@65067d37, com.inn.cafe.JWT.JwtFilter@2db4a84a, org.springframework.security.web.savedrequest.RequestCacheAwareFilter@1eaf4e77, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@23cfc9eb, org.springframework.security.web.authentication.AnonymousAuthenticationFilter@1ecbb787, org.springframework.security.web.session.SessionManagementFilter@480f1311, org.springframework.security.web.access.ExceptionTranslationFilter@10efb806, org.springframework.security.web.access.intercept.FilterSecurityInterceptor@1509bd56]
2023-08-09T18:14:24.062+02:00  INFO 1524 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2023-08-09T18:14:24.069+02:00  INFO 1524 --- [           main] c.i.c.CafeManagementSystemApplication    : Started CafeManagementSystemApplication in 3.846 seconds (process running for 4.195)
2023-08-09T18:14:27.442+02:00  INFO 1524 --- [nio-8080-exec-2] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
2023-08-09T18:14:27.442+02:00  INFO 1524 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2023-08-09T18:14:27.444+02:00  INFO 1524 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : Completed initialization in 1 ms
2023-08-09T18:14:27.519+02:00  INFO 1524 --- [nio-8080-exec-2] c.inn.cafe.serviceImpl.UserServiceImpl   : Inside signup
Hibernate: 
    select
        u1_0.id,
        u1_0.contact_number,
        u1_0.email,
        u1_0.name,
        u1_0.password,
        u1_0.role,
        u1_0.status 
    from
        user u1_0 
    where
        u1_0.email=?
2023-08-09T18:14:27.627+02:00  INFO 1524 --- [nio-8080-exec-2] c.inn.cafe.serviceImpl.UserServiceImpl   : Inside signup
java.lang.NullPointerException: Cannot invoke "java.util.Map.containsKey(Object)" because "requestMap" is null
    at com.inn.cafe.serviceImpl.UserServiceImpl.validateSignupMap(UserServiceImpl.java:47)
    at com.inn.cafe.serviceImpl.UserServiceImpl.signup(UserServiceImpl.java:30)
    at com.inn.cafe.restImpl.UserRestImpl.signup(UserRestImpl.java:24)
    at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
    at java.base/java.lang.reflect.Method.invoke(Method.java:577)
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:884)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1081)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:974)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1011)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:914)
    at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:590)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885)
    at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
    at org.springframework.security.web.FilterChainProxy.lambda$doFilterInternal$3(FilterChainProxy.java:231)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:365)
    at com.inn.cafe.JWT.JwtFilter.doFilterInternal(JwtFilter.java:58)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:107)
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:93)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
    at org.springframework.security.web.header.HeaderWriterFilter.doHeadersAfter(HeaderWriterFilter.java:90)
    at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:75)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
    at org.springframework.security.web.context.SecurityContextHolderFilter.doFilter(SecurityContextHolderFilter.java:82)
    at org.springframework.security.web.context.SecurityContextHolderFilter.doFilter(SecurityContextHolderFilter.java:69)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
    at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:62)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
    at org.springframework.security.web.session.DisableEncodeUrlFilter.doFilterInternal(DisableEncodeUrlFilter.java:42)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:233)
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:191)
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:352)
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:268)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:166)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:391)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:894)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1740)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.base/java.lang.Thread.run(Thread.java:833)

Kann mir vielleicht einer erklären, was falsch läuft?

Was auch komisch ist: Wenn ich an folgendes übergebe

JSON: 
{"name":"max","contactNumber":"0123456789","email":"max@muster.de","password":"maximizer"}

und der User noch nicht existiert, erhalte ich eine Fehlermeldung, trotzdem wird der Eintrag in der Tabelle user angelegt?
 
Oneixee5

Oneixee5

Top Contributor
Die Map ist null, weil du es erlaubst: @RequestBody(required = false)
Wenn du erzwingen willst, das ein RequestBody vorhanden ist, dann musst du "required = false" entfernen und natürlich den Body mitsenden. Warum kein Body ankommt musst du in deinem Client überprüfen. Zum Test würde sich CURL etc. anbieten.
 
padde479

padde479

Bekanntes Mitglied
Danke. Ich verwende Postman. Spring Security macht mich noch wahnsinnig. Ich bekomme wahlweise ein 401 oder 403 zurück.

Java: 
package com.inn.cafe.JWT;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.ProviderManager;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.config.Customizer;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityCustomizer;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationConverter;
import org.springframework.security.oauth2.server.resource.authentication.JwtGrantedAuthoritiesConverter;
import org.springframework.security.web.SecurityFilterChain;

@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Autowired
    CustomerUsersDetailsService customerUsersDetailsService;

    @Autowired
    JwtFilter filter;

    @Bean
    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
        http.csrf((csrf) -> csrf.disable()).authorizeHttpRequests((authorize) -> authorize.anyRequest().authenticated())
                .httpBasic(Customizer.withDefaults());

        return http.build();

    }

    @Bean
    public WebSecurityCustomizer webSecurityCustomizer() {
        return (web) -> web.ignoring().requestMatchers("/images/**", "/js/**", "/webjars/**");
    }

    @Bean
    public BCryptPasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    public AuthenticationManager authenticationManager(UserDetailsService detailsService) {
        DaoAuthenticationProvider daoProvider = new DaoAuthenticationProvider();
        daoProvider.setUserDetailsService(detailsService);
        daoProvider.setPasswordEncoder(passwordEncoder());
        return new ProviderManager(daoProvider);
    }

    @Bean
    public JwtAuthenticationConverter jwtAuthenticationConverter() {
        JwtGrantedAuthoritiesConverter jwtGrantedAuthoritiesConverter = new JwtGrantedAuthoritiesConverter();
        jwtGrantedAuthoritiesConverter.setAuthoritiesClaimName("role");
        jwtGrantedAuthoritiesConverter.setAuthorityPrefix("ROLE_");
        JwtAuthenticationConverter jwtConverter = new JwtAuthenticationConverter();
        jwtConverter.setJwtGrantedAuthoritiesConverter(jwtGrantedAuthoritiesConverter);
        return jwtConverter;
    }
}
 
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