在Spring Boot应用程序中获取类未找到异常错误

时间：2018-11-05 17:14:10

标签： java spring hibernate spring-boot spring-security

My project structure as shown in image attached

Authority.java 

package com.easkart.domain.security;

import org.springframework.security.core.GrantedAuthority;

public class Authority implements GrantedAuthority {

/**
 * 
 */
private static final long serialVersionUID = 5888173406859788817L;
private final String authority;

public Authority(String authority) {
    this.authority = authority;
}

@Override
public String getAuthority() {
    return authority;
}

}

Role.java 

package com.easkart.domain.security;

import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.OneToMany;

@Entity
public class Role {

@Id
private int roleId;
private String name;
@OneToMany(mappedBy = "role", cascade = CascadeType.ALL, fetch = FetchType.LAZY)
private Set<UserRole> userRoles = new HashSet<>();

public int getRoleId() {
    return roleId;
}

public void setRoleId(int roleId) {
    this.roleId = roleId;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public Set<UserRole> getUserRoles() {
    return userRoles;
}

public void setUserRoles(Set<UserRole> userRoles) {
    this.userRoles = userRoles;
}

}

UserRole.java 

package com.easkart.domain.security;

import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

import com.easkart.domain.User;


@Entity
@Table(name = "user_role")
public class UserRole {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long userRoleId;

@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "user_id")
private User user;

@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "role_id")
private Role role;

public UserRole(User user, Role role) {
    this.user = user;
    this.role = role;
}

public long getUserRoleId() {
    return userRoleId;
}

public void setUserRoleId(long userRoleId) {
    this.userRoleId = userRoleId;
}

public User getUser() {
    return user;
}

public void setUser(User user) {
    this.user = user;
}

public Role getRole() {
    return role;
}

public void setRole(Role role) {
    this.role = role;
}

}

User.java 

package com.easkart.domain;

import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;

import com.easkart.domain.security.Authority;
import com.easkart.domain.security.UserRole;
import com.fasterxml.jackson.annotation.JsonIgnore;

@Entity
public class User implements UserDetails {
/**
 * 
 */
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id", nullable = false, updatable = false)
private long userId;
private String fullName;

@Column(name = "email", nullable = false, updatable = false)
private String email;

@Column(name = "phone", nullable = false, updatable = false)
private String phone;
private boolean enabled = true;

@OneToMany(mappedBy = "user", cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@JsonIgnore
private Set<UserRole> userRoles = new HashSet<>();

public long getUserId() {
    return userId;
}

public void setUserId(long userId) {
    this.userId = userId;
}

public String getFullName() {
    return fullName;
}

public void setFullName(String fullName) {
    this.fullName = fullName;
}

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

public String getPhone() {
    return phone;
}

public void setPhone(String phone) {
    this.phone = phone;
}

public void setEnabled(boolean enabled) {
    this.enabled = enabled;
}

public Set<UserRole> getUserRoles() {
    return userRoles;
}

public void setUserRoles(Set<UserRole> userRoles) {
    this.userRoles = userRoles;
}

@Override
public Collection<? extends GrantedAuthority> getAuthorities() {
    Set<GrantedAuthority> grantedAuhority = new HashSet<>();
    for (UserRole userRole : userRoles) {
        grantedAuhority.add(new Authority(userRole.getRole().getName()));
    }
    return grantedAuhority;
}

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

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

@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 enabled;
}

}

当我以Spring Boot应用程序的形式运行此代码时；我得到了例外

  

2018-11-05 22：21：35.643错误5136 --- [main] o.s.boot.SpringApplication：应用程序运行失败       org.springframework.beans.factory.BeanCreationException：在类路径资源[org / springframework / boot / autoconfigure / orm / jpa / HibernateJpaConfiguration.class]中创建名称为'entityManagerFactory'的bean时出错：调用init方法失败；嵌套的异常是org.hibernate.boot.registry.classloading.spi.ClassLoadingException：无法加载类[com.easkart.domain.User]           在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1745）〜[spring-beans-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:576）〜[spring-beans-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:498）〜[spring-beans-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.beans.factory.support.AbstractBeanFactory.lambda $ doGetBean $ 0（AbstractBeanFactory.java:320）〜[spring-beans-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:222）〜[spring-beans-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:318）〜[spring-beans-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:199）〜[spring-beans-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.context.support.AbstractApplicationContext.getBean（AbstractApplicationContext.java:1083）〜[spring-context-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:853）〜[spring-context-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:546）〜[spring-context-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh（ServletWebServerApplicationContext.java:140）〜[spring-boot-2.1.0.RELEASE.jar：2.1.0.RELEASE]           在org.springframework.boot.SpringApplication.refresh（SpringApplication.java:775）上[spring-boot-2.1.0.RELEASE.jar：2.1.0.RELEASE]           在org.springframework.boot.SpringApplication.refreshContext（SpringApplication.java:397）上[spring-boot-2.1.0.RELEASE.jar：2.1.0.RELEASE]           在org.springframework.boot.SpringApplication.run（SpringApplication.java:316）上[spring-boot-2.1.0.RELEASE.jar：2.1.0.RELEASE]           在org.springframework.boot.SpringApplication.run（SpringApplication.java:1260）上[spring-boot-2.1.0.RELEASE.jar：2.1.0.RELEASE]           在org.springframework.boot.SpringApplication.run（SpringApplication.java:1248）上[spring-boot-2.1.0.RELEASE.jar：2.1.0.RELEASE]           在com.easkart.EaskartApplication.main（EaskartApplication.java:10）[classes /：na]       原因：org.hibernate.boot.registry.classloading.spi.ClassLoadingException：无法加载类[com.easkart.domain.User]           在org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.classForName（ClassLoaderServiceImpl.java:354）〜[hibernate-core-5.3.7.Final.jar：5.3.7.Final]           在org.hibernate.boot.model.source.internal.annotations.AnnotationMetadataSourceProcessorImpl。（AnnotationMetadataSourceProcessorImpl.java:105）〜[hibernate-core-5.3.7.Final.jar：5.3.7.Final]           在org.hibernate.boot.model.process.spi.MetadataBuildingProcess $ 1。（MetadataBuildingProcess.java:156）〜[hibernate-core-5.3.7.Final.jar：5.3.7.Final]           在org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete（MetadataBuildingProcess.java:150）〜[hibernate-core-5.3.7.Final.jar：5.3.7.Final]           在org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata（EntityManagerFactoryBuilderImpl.java:904）〜[hibernate-core-5.3.7.Final.jar：5.3.7.Final]           在org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build（EntityManagerFactoryBuilderImpl.java:935）〜[hibernate-core-5.3.7.Final.jar：5.3.7.Final]           在org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory（SpringHibernateJpaPersistenceProvider.java:57）〜[spring-orm-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory（LocalContainerEntityManagerFactoryBean.java:365）〜[spring-orm-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory（AbstractEntityManagerFactoryBean.java:390）〜[spring-orm-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet（AbstractEntityManagerFactoryBean.java:377）〜[spring-orm-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet（LocalContainerEntityManagerFactoryBean.java:341）〜[spring-orm-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1804）〜[spring-beans-5.1.2.RELEASE.jar：5.1.2.RELEASE]           在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1741）〜[spring-beans-5.1.2.RELEASE.jar：5.1.2.RELEASE]           ...省略了16个通用框架       原因：java.lang.ClassNotFoundException：无法加载请求的类：com.easkart.domain.User           在org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl $ AggregatedClassLoader.findClass（ClassLoaderServiceImpl.java:342）〜[hibernate-core-5.3.7.Final.jar：5.3.7.Final]           在java.lang.ClassLoader.loadClass（未知来源）〜[na：1.8.0_151]           在java.lang.ClassLoader.loadClass（未知来源）〜[na：1.8.0_151]           在java.lang.Class.forName0（本机方法）〜[na：1.8.0_151]           在java.lang.Class.forName（未知来源）〜[na：1.8.0_151]           在org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.classForName（ClassLoaderServiceImpl.java:351）〜[hibernate-core-5.3.7.Final.jar：5.3.7.Final]           ...省略了28个常见框架

请帮帮我。

2 个答案:

答案 0 :(得分：0)

将Main移至根包。这样您的结构看起来就像下面的样子。

src/main/java
    -> EaskantApplication (which I guess is the Main class)
        -> All other packages

通常，当Main类不在根目录中时，往往会找不到所需的资源。

答案 1 :(得分：-1)

将EaskartApplication.java移动到新软件包 例如com.easkart.app

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