IDEA 整合 Struts2 + hibernate的demo

1、新建项目：

 

 

 

 

2、添加Jar包：

在pom.xml中：

asm       asm       3.3                     asm       asm-commons       3.3                     asm       asm-tree       3.3                     commons-fileupload       commons-fileupload       1.2.2                     commons-io       commons-io       2.0.1                     org.apache.commons       commons-lang3       3.1                     org.freemarker       freemarker       2.3.19                     javassist       javassist       3.11.0.GA                     ognl       ognl       3.0.5                     org.apache.struts       struts2-core       2.3.4                     org.apache.struts.xwork       xwork-core       2.3.4                         antlr       antlr       2.7.7                     dom4j       dom4j       1.6.1                     org.hibernate.common       hibernate-commons-annotations       5.0.2.Final                     org.hibernate       hibernate-core       5.2.10.Final                     org.hibernate.javax.persistence       hibernate-jpa-2.0-api       1.0.1.Final                     org.javassist       javassist       3.15.0-GA                     org.jboss.logging       jboss-logging       3.3.0.Final                     org.jboss.spec.javax.transaction       jboss-transaction-api_1.1_spec       1.0.1.Final                             mysql       mysql-connector-java       8.0.13                     junit       junit       4.11       test               org.junit.jupiter       junit-jupiter-api       5.2.0       compile     javax.servlet   javax.servlet-api   4.0.1   provided   javax.servlet.jsp   javax.servlet.jsp-api   2.3.1   provided                                         org.apache.maven.plugins           maven-compiler-plugin           3.1                          1.8             1.8             UTF-8                                                     src/main/resources                      src/main/java                   **/*.properties           **/*.xml                         false

 

3、hibernate自动生成实体类、映射文件：

1、连接mysql

 

成功：

 

2、添加hibernate插件支持：

 

 

 

 

 

 

 

 

成功结果：

 

3、Hibernate映射文件，需要添加主键生成策略：

①这是主键自增：

<generator class="identity">generator>  这是自增-->

 

②这是uuid 字符串唯一：

<generator class="uuid"/>

 

4、如果再次想生成实体类和映射文件：

 

5、创建hibernate核心配置文件：

Hibernate.cfg.xml

hibernate-configuration PUBLIC         "-//Hibernate/Hibernate Configuration DTD 3.0//EN"         "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration>     <session-factory>                 <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driverproperty>         <property name="hibernate.connection.url">             jdbc:mysql://127.0.0.1:3307/hibernate?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC         property>         <property name="hibernate.connection.username">rootproperty>         <property name="hibernate.connection.password">passwordproperty>                 <property name="hibernate.dialect">org.hibernate.dialect.MySQL55Dialectproperty>                 <property name="hbm2ddl.auto">updateproperty>                 <property name="hibernate.show_sql">trueproperty>         <property name="hibernate.format_sql">trueproperty> <property name="hibernate.current_session_context_class">threadproperty>                 <mapping resource="com/lemon/pojo/Students.hbm.xml">mapping>         <mapping resource="com/lemon/pojo/Users.hbm.xml">mapping>     session-factory> hibernate-configuration>

 

 

注册实体：

配置数据库：

 

 

 

6、工具类：

HibernateUtils.java

package com.lemon.utils; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; /**  * 工具类：  */ public class HibernateUtils {     private static SessionFactory sessionFactory;     static {         //1、加载配置         Configuration configuration = new Configuration();         configuration.configure("hibernate.cfg.xml");         /*单例模式*/         //得到工厂 工厂来生产操作数据库的对象         sessionFactory = configuration.buildSessionFactory();     }     //2、得到session     public static Session openSession() {         return sessionFactory.openSession();     }          //获取session方式二：使用这个session必须开启事务     public static Session getCurrentSession() {         //受线程绑定，即在多线程下，线程是安全的         return sessionFactory.getCurrentSession();     } }

 

 

 

 

7、测试：

package com.lemon; import com.lemon.pojo.Students; import com.lemon.utils.HibernateUtils; import org.hibernate.Session; import org.hibernate.query.Query; import org.junit.jupiter.api.Test; /**  * 测试类  *  */ public class App {     //查找     public void findById(){         Session session = HibernateUtils.openSession();         Query query = session.createQuery("from Students where id = ?", Students.class);         query.setParameter(0,"S0000001");         Students students = query.uniqueResult();         System.out.println(students.getSname() + "\t" + students.getGender());         session.close();     }     public static void main(String[] args) {         App app = new App();         app.findById();     } }

 

 

 

 

 

 

 

测试成功：

 

4、Hibernate与Struts2整合

4.1、添加web：

 

 

4.2、配置web.xml

<filter>     <filter-name>struts2filter-name>     <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilterfilter-class> filter> <filter-mapping>     <filter-name>struts2filter-name>     <url-pattern>/*url-pattern>  filter-mapping> <welcome-file-list>     <welcome-file>index.jspwelcome-file> welcome-file-list>

 

4.3、配置struts.xml

xml version="1.0" encoding="UTF-8"?> struts PUBLIC         "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"         "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts>         <package name="default" namespace="/" extends="struts-default">             package> struts>