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[英]Hibernate - org.hibernate.exception.GenericJDBCException: Cannot open connection
[英]how to resolve ==> org.hibernate.exception.GenericJDBCException: Could not open connection
當我執行我的主類時,我得到這個執行無法弄清問題點
錯誤出現在事務TR = session.beginTransaction();行中
錯誤堆棧說:
ERROR: Access denied for user 'root'@'localhost' (using password: NO)
error===>org.hibernate.exception.GenericJDBCException: Could not open connection
我的主類文件:
package com.hussi.model;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
public class Main {
public static void main(String[] args)
{
User user = new User();
user.setUser_id(1);
user.setUsername("hussi");
user.setPassword("maria");
SessionFactory sesionFactory = new Configuration().configure().buildSessionFactory() ;
Session session = sesionFactory.openSession();
try{
Transaction tr = session.beginTransaction();
session.save(user);
}
catch(Exception e)
{
System.out.println("error===>"+e);
}
finally
{
session.flush();
session.close();
}
}
}
我的模型文件
package com.hussi.model;
public class User
{
int user_id;
String username;
String password;
public int getUser_id() {
return user_id;
}
public void setUser_id(int user_id) {
this.user_id = user_id;
}
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 toString()
{
return "username==>"+this.username+" : password==>"+this.password;
}
}
我的user.hbm.xml文件
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.hussi.model.User" table="users">
<id name="user_id" type="int" column="user_id">
<generator class="increment" />
</id>
<property name="username">
<column name="username"/>
</property>
<property name="password">
<column name="password"/>
</property>
</class>
</hibernate-mapping>
我的休眠配置文件:hibernate.cfg.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/my_hibernate_1</property>
<property name="connection.username">root</property>
<property name="connecttion.password">root</property>
<!-- Database connection settings -->
<property name="connection.pool_size">1</property>
<!-- MySql Dialect -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">false</property>
<mapping resource="user.hbm.xml"/>
</session-factory>
</hibernate-configuration>
我相信您需要重設數據庫密碼。 單擊此鏈接以執行相同操作:
http://dev.mysql.com/doc/refman/5.1/en/resetting-permissions.html
或用戶權限不正確。 請按照以下步驟設置特權:
http://dev.mysql.com/doc/refman/5.1/en/default-privileges.html
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