数据库连接错误
我一直致力于一个项目，这是一个简单的Spring，Hibernate，JSF，MySQL集成;我在Eclipse上运行它。该程序的目的是在MySQLWorkbench上添加Person（id，名字，姓氏，性别，年龄等）数据库并在服务器上运行它。我使用Spring4，Hibernate4，Primefaces 5.0.2和Eclipse Luna作为工具。我将项目构建为maven。 当我在main上运行程序时，我想看到我的表中包含一个新的Person。 我在终端上为我创建的用户使用了“GRANT ALL ON”和“FLUSH PRIVILEGES”命令，并收到“Query OK”消息。 尽管在必要的文件上指定了用户名和密码，但我无法在我的表中添加新记录。我的项目结构如下：
其他文件是：
domain-classes.hbm.xml：
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class table="testPerson" name="com.hibernate.data.Person">
<id column="person_id" type="int" name="id">
<generator class="increment" />
</id>
<property name="firstName" column="person_firstname" type="string" />
<property name="lastName" column="person_lastname" type="string" />
<property name="gender" column="person_gender" type="string" />
<property name="age" column="person_age" type="int" />
</class>
</hibernate-mapping>
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="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/PERSONDB</property>
<property name="hibernate.connection.username">fulden2</property>
<property name="hibernate.connection.password">secret_pass</property>
<!-- SQL dialect -->
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- Show SQL -->
<property name="show_sql">true</property>
<!-- Specify session context -->
<property name="hibernate.current_session_context_class">thread</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- Autocommit -->
<property name="hibernate.connection.autocommit">false</property>
<!-- Referring Mapping File -->
<mapping resource="domain-classes.hbm.xml" />
</session-factory>
</hibernate-configuration>
applicationContext.xml：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
<!-- Enable Spring Annotation Configuration -->
<context:annotation-config />
<!-- Scan for all of Spring components such as Spring Service -->
<context:component-scan base-package="com.*"></context:component-scan>
<!-- Create Data Source bean -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/PERSONDB" />
<property name="username" value="fulden2" />
<property name="password" value="secret_pass" />
</bean>
<!-- Define SessionFactory bean -->
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation">
<value>classpath:hibernate.cfg.xml</value>
</property>
</bean>
<!-- Transaction Manager -->
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<!-- Detect @Transactional Annotation -->
<tx:annotation-driven transaction-manager="transactionManager" />
</beans>
的pom.xml：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>test</groupId>
<artifactId>PersonApp</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>PersonApp</name>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.0.2</version>
<configuration>
<source>1.4</source>
<target>1.4</target>
</configuration>
</plugin>
</plugins>
</build>
<url>http://maven.apache.org</url>
<repositories>
<repository>
<id>prime-repo</id>
<name>PrimeFaces Maven Repository</name>
<url>http://repository.primefaces.org</url>
<layout>default</layout>
</repository>
</repositories>
<dependencies>
<!-- Servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<!-- Faces Implementation -->
<dependency>
<groupId>com.sun.faces</groupId>
<artifactId>jsf-impl</artifactId>
<version>2.2.10</version>
</dependency>
<!-- Faces Library -->
<dependency>
<groupId>com.sun.faces</groupId>
<artifactId>jsf-api</artifactId>
<version>2.2.10</version>
</dependency>
<!-- Primefaces Version 5 -->
<dependency>
<groupId>org.primefaces</groupId>
<artifactId>primefaces</artifactId>
<version>5.2</version>
</dependency>
<!-- JSP Library -->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.1</version>
</dependency>
<!-- JSTL Library -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- Primefaces Theme Library -->
<dependency>
<groupId>org.primefaces.themes</groupId>
<artifactId>blitzer</artifactId>
<version>1.0.10</version>
</dependency>
<!-- Hibernate library -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.3.9.Final</version>
</dependency>
<!-- MySQL driver connector library -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
</dependency>
<!-- Spring ORM -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<!-- Spring Web -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
</dependencies>
</project>
主要课程：
package com.test;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import com.hibernate.data.Person;
public class Main {
public static void main(String [] args){
Configuration configuration = new Configuration();
System.out.println("CFG and hbm files loaded successfully.");//just to test
configuration.configure("hibernate.cfg.xml");
SessionFactory factory = configuration.buildSessionFactory(new StandardServiceRegistryBuilder().configure().build());
Session session = factory.openSession();
Transaction tx = session.getTransaction();
tx.begin();
System.out.println("Transaction began");//just to test
Person newPerson = new Person();
newPerson.setFirstName("aa");
newPerson.setLastName("bbb");
newPerson.setGender("Male");
newPerson.setAge(2);
session.save(newPerson);
session.flush();
tx.commit();
session.close();
System.out.println("Session closed");//just to test
}
}
是否有额外的步骤来实现此数据库连接？
或者我的错误是什么？
感谢您的帮助..
1 个答案:
答案 0 :(得分：0)
可能你的会话没有被刷新;可能是您配置中的一个小故障。如果您已配置OpenSessionInView过滤器它会更改配置的默认刷新模式，则会为实例多次执行此操作。在DAO层中检查flushMode session.getFlushMode()
刷新模式不应为NEVER或MANUAL
如果没有刷新会话，则不会更新db。您必须在事务后session.flush()
同样在in配置文件中，只需将属性从false＆amp;更改为true即可。检查<property name="connection.autocommit">true</property>
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