Java 我正在尝试使用存储在数据库中的用户名和密码创建自定义登录页。但我无法解决此错误

我是SpringSecurity的初学者，代码看起来不错，我认为缺少了一些东西

提升应用程序时，它将显示以下错误，但我还没有为appconfig创建bean

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.5.RELEASE)

2020-03-14 12:31:34.584  INFO 5148 --- [           main] com.access6.SecureDemoAppApplication     : Starting SecureDemoAppApplication on DESKTOP-G23R8VK with PID 5148 (D:\workspace-spring-tool-suite-4-4.5.1.RELEASE\SecureDemoApp\target\classes started by Admin in D:\workspace-spring-tool-suite-4-4.5.1.RELEASE\SecureDemoApp)
2020-03-14 12:31:34.588  INFO 5148 --- [           main] com.access6.SecureDemoAppApplication     : No active profile set, falling back to default profiles: default
2020-03-14 12:31:35.199  INFO 5148 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2020-03-14 12:31:35.255  INFO 5148 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 49ms. Found 1 JPA repository interfaces.
2020-03-14 12:31:35.717  INFO 5148 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2020-03-14 12:31:35.724  INFO 5148 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2020-03-14 12:31:35.724  INFO 5148 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.31]
2020-03-14 12:31:35.918  INFO 5148 --- [           main] org.apache.jasper.servlet.TldScanner     : At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
2020-03-14 12:31:35.922  INFO 5148 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2020-03-14 12:31:35.922  INFO 5148 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1291 ms
2020-03-14 12:31:36.075  INFO 5148 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
2020-03-14 12:31:36.133  INFO 5148 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 5.4.12.Final
2020-03-14 12:31:36.258  INFO 5148 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2020-03-14 12:31:36.451  INFO 5148 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2020-03-14 12:31:36.838  INFO 5148 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2020-03-14 12:31:36.854  INFO 5148 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.MySQL8Dialect
2020-03-14 12:31:37.401  INFO 5148 --- [           main] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2020-03-14 12:31:37.408  INFO 5148 --- [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2020-03-14 12:31:37.467  WARN 5148 --- [           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
2020-03-14 12:31:37.710  WARN 5148 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'appConfig': Unsatisfied dependency expressed through field 'UserDetailsService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userDetailsService': Unsatisfied dependency expressed through field 'reop'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepo': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.access6.User com.access6.UserRepo.findByUserName(java.lang.String)! No property userName found for type User!
2020-03-14 12:31:37.710  INFO 5148 --- [           main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2020-03-14 12:31:37.713  INFO 5148 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
2020-03-14 12:31:37.718  INFO 5148 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.
2020-03-14 12:31:37.720  INFO 5148 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2020-03-14 12:31:37.734  INFO 5148 --- [           main] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-03-14 12:31:37.743 ERROR 5148 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'appConfig': Unsatisfied dependency expressed through field 'UserDetailsService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userDetailsService': Unsatisfied dependency expressed through field 'reop'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepo': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.access6.User com.access6.UserRepo.findByUserName(java.lang.String)! No property userName found for type User!
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:643) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:130) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

这是我的密码：

配置类

package com.access6;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.password.NoOpPasswordEncoder;

@SuppressWarnings("deprecation")
@Configuration
@EnableWebSecurity
public class AppConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    public UserDetailsService UserDetailsService;
    @Bean
    public AuthenticationProvider authpro() {
        DaoAuthenticationProvider DAuthpro= new DaoAuthenticationProvider();
        DAuthpro.setUserDetailsService(UserDetailsService);
        DAuthpro.setPasswordEncoder(NoOpPasswordEncoder.getInstance());
        return DAuthpro;
    }
    @Bean
    public User u () {
        return new User();
    }
}

package com.access6;
import java.util.Collection;
import java.util.Collections;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
@Service
@Component
@SuppressWarnings("serial")
public class UserDetailsImpli implements UserDetails {
    User user;

    public UserDetailsImpli(User user) {
        super();
        this.user = user;
    }

    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
        return Collections.singleton(new SimpleGrantedAuthority("USER"));
    }

    @Override
    public String getPassword() {
        // TODO Auto-generated method stub
        return user.getPassword();
    }

    @Override
    public String getUsername() {
        // TODO Auto-generated method stub
        return user.getName();
    }

    @Override
    public boolean isAccountNonExpired() {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean isAccountNonLocked() {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean isEnabled() {
        // TODO Auto-generated method stub
        return true;
    }
}

控制器类

 package com.access6;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;

@RestController
public class SecureContrlr {
    @RequestMapping("/")
    public ModelAndView weclome() {
        return new ModelAndView("home");
    }

}

模型

存储库

package com.access6;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.stereotype.Repository;
@Repository
@EnableJpaRepositories
public interface UserRepo extends JpaRepository<User, Long> {
    User  findByUserName(String UserName);
}

实现类

package com.access6;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.password.NoOpPasswordEncoder;

@SuppressWarnings("deprecation")
@Configuration
@EnableWebSecurity
public class AppConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    public UserDetailsService UserDetailsService;
    @Bean
    public AuthenticationProvider authpro() {
        DaoAuthenticationProvider DAuthpro= new DaoAuthenticationProvider();
        DAuthpro.setUserDetailsService(UserDetailsService);
        DAuthpro.setPasswordEncoder(NoOpPasswordEncoder.getInstance());
        return DAuthpro;
    }
    @Bean
    public User u () {
        return new User();
    }
}

package com.access6;
import java.util.Collection;
import java.util.Collections;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
@Service
@Component
@SuppressWarnings("serial")
public class UserDetailsImpli implements UserDetails {
    User user;

    public UserDetailsImpli(User user) {
        super();
        this.user = user;
    }

    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
        return Collections.singleton(new SimpleGrantedAuthority("USER"));
    }

    @Override
    public String getPassword() {
        // TODO Auto-generated method stub
        return user.getPassword();
    }

    @Override
    public String getUsername() {
        // TODO Auto-generated method stub
        return user.getName();
    }

    @Override
    public boolean isAccountNonExpired() {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean isAccountNonLocked() {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean isEnabled() {
        // TODO Auto-generated method stub
        return true;
    }
}

---

将存储库中的方法重命名为：

public interface UserRepo extends JpaRepository<User, Long> {
    User findByName(String UserName);
}

---

您不需要在方法签名中写入实体名称。通过查找后，字段的名称应紧跟其后，即名称camelCase。

您的自定义存储库方法错误。改为：

User  findByName(String name);

正如例外情况告诉你的那样

No property userName found for type User!

findBy*仅在其名称与模型中的名称完全相同时才起作用

更新

首先，你可以用谷歌搜索“不满意的支出例外”的含义。现在你可以阅读信息了。这可能有点棘手，因为在本例中，可能存在嵌套执行，在一行中很难读取消息

让我们把它分解一下

这是一个开始，告诉您在创建UserDetailsServebean时出现了一个问题：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'appConfig': Unsatisfied dependency expressed through field 'UserDetailsService'; 

但问题不在于服务，而在于存储库bean：

nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userDetailsService': Unsatisfied dependency expressed through field 'reop'; 

在存储库bean中，由于某些原因，方法的创建失败：

nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepo': Invocation of init method failed; 

就是这样：spring尝试创建一个方法findByUserName，但用户模型没有名为userName的属性：

nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.access6.User com.access6.UserRepo.findByUserName(java.lang.String)! No property userName found for type User!

---

阅读这样一个例外，你总是可以滚动到最右边并阅读最后一句话。现在你应该知道该怎么做了。

哇，只是一个小小的改变就帮我解决了这个错误。谢谢你的时间，这对我有帮助，你也能告诉我你是怎么读到这个错误的吗？我更新了我的答案，因为评论很简短：如果有帮助，请点击灰色旅行，接受答案。谢谢你让我大吃一惊！！，奇妙的解释。谢谢你花时间在这上面。你能通过这个链接吗？对不起，可以早点回答。。。希望有帮助！