Java 为什么我会得到一个“；MySQLSyntaxErrorException:用户的访问被拒绝；错误？
运行应用程序时，堆栈跟踪中提到了错误Java 为什么我会得到一个“；MySQLSyntaxErrorException:用户的访问被拒绝；错误？,java,mysql,spring,hibernate,jpa,Java,Mysql,Spring,Hibernate,Jpa,运行应用程序时，堆栈跟踪中提到了错误 com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:Accès refusépour l'usilisateur:''@'@localhost'。基本'db_hajar' （我用的是弹簧靴）。 你能帮忙吗 以下是我正在使用的数据库类： package demo.entities; import java.io.Serializable; import java.util.Collection;
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:Accès refusépour l'usilisateur:''@'@localhost'。基本'db_hajar' （我用的是弹簧靴）。 你能帮忙吗 以下是我正在使用的数据库类：
package demo.entities;
import java.io.Serializable;
import java.util.Collection;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
@Entity
public class Database implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private int id_database;
private String database_name;
@OneToMany
@JoinColumn(name="id_entity")
private Collection<entities>entities;
public int getId_database() {
return id_database;
}
public void setId_database(int id_database) {
this.id_database = id_database;
}
public String getDatabase_name() {
return database_name;
}
public void setDatabase_name(String database_name) {
this.database_name = database_name;
}
public Database() {
super();
// TODO Auto-generated constructor stub
}
public Database(int id_database, String database_name) {
super();
this.id_database = id_database;
this.database_name = database_name;
}
@Override
public String toString() {
return "Database [id_database=" + id_database + ", database_name="
+ database_name + "]";
}
}
# DataSourcesettings:
spring.datasource.url= jdbc:mysql://localhost:3306/db_hajar
spring.datasource.username= root
spring.datasource.password=
spring.datasource.driverClassName= com.mysql.jdbc.Driver
# Specifythe DBMS #
spring.jpa.database = MYSQL
# Show or not log for each sqlquery
spring.jpa.show-sql = true
# Hibernateddlauto (create, create-drop, update)
spring.jpa.hibernate.ddl-auto = update
# Naming strategy
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Accès refusé pour l'utilisateur: ''@'@localhost'. Base 'db_hajar'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
at com.mysql.jdbc.Util.getInstance(Util.java:360)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:978)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3887)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3823)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:870)
at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1659)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1206)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2234)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2265)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2064)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:790)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:395)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:325)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:307)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:200)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:699)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:633)
at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:484)
at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:142)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:115)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:102)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:126)
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:139)
at org.hibernate.tool.hbm2ddl.SuppliedConnectionProviderConnectionHelper.prepare(SuppliedConnectionProviderConnectionHelper.java:51)
at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:219)
at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:203)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:522)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1859)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:852)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:845)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:398)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:844)
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:343)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1633)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:956)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:747)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
at demo.DemoJpaApplication.main(DemoJpaApplication.java:10)
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:Accès refulsépour l'usilizateur:'@'@localhost'。基本'db_hajar'
位于sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）
位于sun.reflect.NativeConstructorAccessorImpl.newInstance（未知源）
位于sun.reflect.delegatingConstructor或AccessorImpl.newInstance（未知源）
位于java.lang.reflect.Constructor.newInstance（未知源）
位于com.mysql.jdbc.Util.HandleneInstance（Util.java:377）
位于com.mysql.jdbc.Util.getInstance（Util.java:360）
位于com.mysql.jdbc.SQLError.createSQLException（SQLError.java:978）
在com.mysql.jdbc.MysqlIO.checkErrorPacket上（MysqlIO.java:3887）
在com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:3823）上
在com.mysql.jdbc.MysqlIO.checkErrorPacket上（MysqlIO.java:870）
在com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication（MysqlIO.java:1659）上
位于com.mysql.jdbc.MysqlIO.doHandshake（MysqlIO.java:1206）
位于com.mysql.jdbc.ConnectionImpl.coreConnect（ConnectionImpl.java:2234）
位于com.mysql.jdbc.ConnectionImpl.connectOneTryOnly（ConnectionImpl.java:2265）
位于com.mysql.jdbc.ConnectionImpl.createNewIO（ConnectionImpl.java:2064）
位于com.mysql.jdbc.ConnectionImpl（ConnectionImpl.java:790）
位于com.mysql.jdbc.JDBC4Connection（JDBC4Connection.java:44）
位于sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）
位于sun.reflect.NativeConstructorAccessorImpl.newInstance（未知源）
位于sun.reflect.delegatingConstructor或AccessorImpl.newInstance（未知源）
位于java.lang.reflect.Constructor.newInstance（未知源）
位于com.mysql.jdbc.Util.HandleneInstance（Util.java:377）
位于com.mysql.jdbc.ConnectionImpl.getInstance（ConnectionImpl.java:395）
位于com.mysql.jdbc.NonRegisteringDriver.connect（NonRegisteringDriver.java:325）
位于org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver（PooledConnection.java:307）
位于org.apache.tomcat.jdbc.pool.PooledConnection.connect（PooledConnection.java:200）
位于org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection（ConnectionPool.java:699）
位于org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection（ConnectionPool.java:633）
位于org.apache.tomcat.jdbc.pool.ConnectionPool.init（ConnectionPool.java:484）
位于org.apache.tomcat.jdbc.pool.ConnectionPool.（ConnectionPool.java:142）
位于org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool（DataSourceProxy.java:115）
位于org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool（DataSourceProxy.java:102）
位于org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection（DataSourceProxy.java:126）
位于org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection（DatasourceConnectionProviderImpl.java:139）
位于org.hibernate.tool.hbm2ddl.SuppliedConnectionProviderConnectionHelper.prepare（SuppliedConnectionProviderConnectionHelper.java:51）
位于org.hibernate.tool.hbm2ddl.SchemaUpdate.execute（SchemaUpdate.java:219）
位于org.hibernate.tool.hbm2ddl.SchemaUpdate.execute（SchemaUpdate.java:203）
位于org.hibernate.internal.SessionFactoryImpl.（SessionFactoryImpl.java:522）
位于org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1859）
位于org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform（EntityManagerFactoryBuilderImpl.java:852）
位于org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform（EntityManagerFactoryBuilderImpl.java:845）
位于org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl（ClassLoaderServiceImpl.java:398）
位于org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build（EntityManagerFactoryBuilderImpl.java:844）
位于org.springframework.orm.jpa.vendor.springhibernatejbapersistenceprovider.createContainerEntityManager工厂（springhibernatejbapersistenceprovider.java:60）
位于org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory（LocalContainerEntityManagerFactoryBean.java:343）
位于org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.AfterPropertieSet（AbstractEntityManagerFactoryBean.java:318）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1633）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1570）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:539）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:476）
位于org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject（AbstractBeanFactory.java:303）
位于org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230）
位于org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:299）
位于org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:194）
位于org.springframework.context.support.AbstractApplicationContext.getBean（AbstractApplication
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Accès refusé pour l'utilisateur: ''@'@localhost'. Base 'db_hajar'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
at com.mysql.jdbc.Util.getInstance(Util.java:360)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:978)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3887)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3823)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:870)
at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1659)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1206)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2234)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2265)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2064)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:790)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:395)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:325)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:307)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:200)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:699)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:633)
at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:484)
at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:142)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:115)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:102)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:126)
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:139)
at org.hibernate.tool.hbm2ddl.SuppliedConnectionProviderConnectionHelper.prepare(SuppliedConnectionProviderConnectionHelper.java:51)
at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:219)
at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:203)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:522)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1859)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:852)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:845)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:398)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:844)
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:343)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1633)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:956)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:747)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
at demo.DemoJpaApplication.main(DemoJpaApplication.java:10)