异常：org.hibernate.annotationException：未为实体指定标识符：jpa.tenants.DataSourceConfig

Question

我在下面的链接中了解“https://medium.com/swlh/multi-tenancy-implementation-using-spring-boot-hibernate-6A8E3ECB251A”教程

package jpa.tenants;
import java.util.HashMap;
import java.util.Map;

import javax.annotation.PostConstruct;
import javax.sql.DataSource;

import org.hibernate.engine.jdbc.connections.spi.AbstractDataSourceBasedMultiTenantConnectionProviderImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Component;

@SuppressWarnings("serial")
@Component
public class DataSourceBasedMultiTenantConnectionProviderImpl extends AbstractDataSourceBasedMultiTenantConnectionProviderImpl {
    @Autowired
    private DataSource defaultDS;

    @Autowired
    private ApplicationContext context;

    private Map<String, DataSource> map = new HashMap<>();

    boolean init = false;

    private String DEFAULT_TENANT_ID="1";

    @PostConstruct
    public void load() {
        map.put(DEFAULT_TENANT_ID, defaultDS);
    }

    @Override
    protected DataSource selectAnyDataSource() {
        return map.get(DEFAULT_TENANT_ID);
    }

    @Override
    protected DataSource selectDataSource(String tenantIdentifier) {
        if (!init) {
            init = true;
            TenantDataSource tenantDataSource = context.getBean(TenantDataSource.class);
            map.putAll(tenantDataSource.getAll());
        }
        return map.get(tenantIdentifier) != null ? map.get(tenantIdentifier) : map.get(DEFAULT_TENANT_ID);
    }
}

导致以下例外情况：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path

null

    'This is my DataSourceConfig Class:-'

    package jpa.tenants;

    import javax.persistence.Column;
    import javax.persistence.Entity;
    import javax.persistence.GeneratedValue;
    import javax.persistence.GenerationType;

    import org.hibernate.annotations.Table;
    import org.springframework.data.annotation.Id;

    import com.fasterxml.jackson.annotation.JsonIgnore;

    @Entity
    @Table(appliesTo= "DATASOURCECONFIG")
    public class DataSourceConfig {

        @Id
        @JsonIgnore
        @Column(name="id", nullable=false)
        @GeneratedValue(strategy = GenerationType.AUTO)
        private Long id;

        private String name;
        private String url;
        private String username;
        private String password;
        private String driverClassName;
        private boolean initialize;

        public Long getId() {
            return id;
        }

        public void setId(Long id) {
            this.id = id;
        }

        public String getName() {
            return name;
        }

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

        public String getUrl() {
            return url;
        }

        public void setUrl(String url) {
            this.url = url;
        }

        public String getUsername() {
            return username;
        }

        public void setUsername(String username) {
            this.username = username;
        }

        public String getPassword() {
            return password;
        }

        public void setPassword(String password) {
            this.password = password;
        }

        public String getDriverClassName() {
            return driverClassName;
        }

        public void setDriverClassName(String driverClassName) {
            this.driverClassName = driverClassName;
        }

        public boolean isInitialize() {
            return initialize;
        }

        public void setInitialize(boolean initialize) {
            this.initialize = initialize;
        }
    }

    ----------------------------------------


----------


   ' Any help is highly appriciated thanks..'

Answer 1

类DataSourceConfig中的ID批注从错误的包导入：

import org.springframework.data.annotation.Id;

这一定是

import javax.persistence.Id;