Spring：Spring&Struts2&Hibernate整合后，实现查询Employee信息

Posted 2020-09-17 yy

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背景：

　　基于之前两篇文章《Spring（三）：Spring整合Hibernate》、《Spring（四）：Spring整合Hibernate，之后整合Struts2》，了解了如何整合SSH的过程，但还不知道整合后在项目中该怎么开发使用，本文主要讲解的是基于SSH实现Employee信息查询功能的使用。

新建Employee,Department实体类，并添加对应类的hibernate实体配置文件

　　新建包com.dx.ssh.entities，在该包下创建Employee、Department实体类，并添加对应的hibernate实体配置文件Employee.hbm.xml、Department.hbm.xml

Employee.java

 1 package com.dx.ssh.entities;
 2 
 3 public class Department {
 4     private Integer id;
 5     private String deparmentName;
 6 
 7     public Integer getId() {
 8         return id;
 9     }
10 
11     public void setId(Integer id) {
12         this.id = id;
13     }
14 
15     public String getDeparmentName() {
16         return deparmentName;
17     }
18 
19     public void setDeparmentName(String deparmentName) {
20         this.deparmentName = deparmentName;
21     }
22 }

View Code

Employee.hbm.xml

 1 <?xml version="1.0"?>
 2 <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 3 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 4 <!-- Generated 2017-5-9 16:33:32 by Hibernate Tools 3.5.0.Final -->
 5 <hibernate-mapping>
 6     <class name="com.dx.ssh.entities.Department" table="SSH_DEPARTMENT">
 7         <id name="id" type="java.lang.Integer">
 8             <column name="ID" />
 9             <generator class="native" />
10         </id>
11         <property name="deparmentName" type="java.lang.String">
12             <column name="DEPARMENTNAME" />
13         </property>
14     </class>
15 </hibernate-mapping>

View Code

Department.java

 1 package com.dx.ssh.entities;
 2 
 3 import java.util.Date;
 4 
 5 public class Employee {
 6     private Integer id;
 7     private String lastName;
 8     private String email;
 9     private Date birth;
10     // 不能被修改
11     private Date createTime;
12     // n:1的关系
13     private Department department;
14 
15     public Integer getId() {
16         return id;
17     }
18 
19     public void setId(Integer id) {
20         this.id = id;
21     }
22 
23     public String getLastName() {
24         return lastName;
25     }
26 
27     public void setLastName(String lastName) {
28         this.lastName = lastName;
29     }
30 
31     public String getEmail() {
32         return email;
33     }
34 
35     public void setEmail(String email) {
36         this.email = email;
37     }
38 
39     public Date getBirth() {
40         return birth;
41     }
42 
43     public void setBirth(Date birth) {
44         this.birth = birth;
45     }
46 
47     public Date getCreateTime() {
48         return createTime;
49     }
50 
51     public void setCreateTime(Date createTime) {
52         this.createTime = createTime;
53     }
54 
55     public Department getDepartment() {
56         return department;
57     }
58 
59     public void setDepartment(Department department) {
60         this.department = department;
61     }
62 }

View Code

Department.hbm.xml

 1 <?xml version="1.0"?>
 2 <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 3 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 4 <!-- Generated 2017-5-9 16:33:32 by Hibernate Tools 3.5.0.Final -->
 5 <hibernate-mapping>
 6     <class name="com.dx.ssh.entities.Employee" table="SSH_EMPLOYEE">
 7         <id name="id" type="java.lang.Integer">
 8             <column name="ID" />
 9             <generator class="native" />
10         </id>
11         <property name="lastName" type="java.lang.String">
12             <column name="LASTNAME" />
13         </property>
14         <property name="email" type="java.lang.String">
15             <column name="EMAIL" />
16         </property>
17         <property name="birth" type="java.util.Date">
18             <column name="BIRTH" />
19         </property>
20         <property name="createTime" type="java.util.Date">
21             <column name="CREATETIME" />
22         </property>
23         <!-- 单项N:1关联关系 -->
24         <many-to-one name="department" class="com.dx.ssh.entities.Department">
25             <column name="DEPARTMENT_ID" />
26         </many-to-one>
27     </class>
28 </hibernate-mapping>

View Code

添加Dao、Service、Action，并配置相关配置文件

添加包com.dx.ssh.dao，并新建EmployeeDao.java

package com.dx.ssh.dao;

import java.util.List;

import org.hibernate.Session;
import org.hibernate.SessionFactory;

import com.dx.ssh.entities.Employee;

public class EmployeeDao {
    private SessionFactory sessionFactory;

    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    private Session getSession() {
        return this.sessionFactory.getCurrentSession();
    }

    public List<Employee> getAll() {
        String hql = "From Employee e LEFT OUTER JOIN FETCH e.department";
        return getSession().createQuery(hql).list();
    }
}

在com.dx.ssh.service包下，新建EmployeeService.java

package com.dx.ssh.service;

import java.util.List;

import com.dx.ssh.dao.EmployeeDao;
import com.dx.ssh.entities.Employee;

public class EmployeeService {
    private EmployeeDao employeeDao;

    public void setEmployeeDao(EmployeeDao employeeDao) {
        this.employeeDao = employeeDao;
    }

    public List<Employee> getAll() {
        List<Employee> items = employeeDao.getAll();

        return items;
    }
}

在com.dx.ssh.actions下，新建Action类EmployeeAction.java

package com.dx.ssh.service;

import java.util.List;

import com.dx.ssh.dao.EmployeeDao;
import com.dx.ssh.entities.Employee;

public class EmployeeService {
    private EmployeeDao employeeDao;

    public void setEmployeeDao(EmployeeDao employeeDao) {
        this.employeeDao = employeeDao;
    }

    public List<Employee> getAll() {
        List<Employee> items = employeeDao.getAll();

        return items;
    }
}

配置applicationContext-beans.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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="employeeDao" class="com.dx.ssh.dao.EmployeeDao">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>

    <bean id="employeeService" class="com.dx.ssh.service.EmployeeService">
        <property name="employeeDao" ref="employeeDao"></property>
    </bean>

    <bean id="employeeAction" class="com.dx.ssh.actions.EmployeeAction" scope="prototype">
        <property name="employeeService" ref="employeeService"></property>
    </bean>
</beans>

配置struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
    <constant name="struts.enable.DynamicMethodInvocation" value="false" />
    <constant name="struts.devMode" value="true" />

    <package name="default" namespace="/" extends="struts-default">
        <action name="emp-*" class="employeeAction" method="{1}">
            <result name="list">/WEB-INF/views/emp-list.jsp</result>
        </action>
    </package>
</struts>

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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:tx="http://www.springframework.org/schema/tx"
    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-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

    <!-- 加载配置文件 -->
    <context:property-placeholder location="classpath:jdbc.properties" file-encoding="utf-8" ignore-unresolvable="true" />

    <!-- 配置数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driverClassName}"></property>
        <property name="jdbcUrl" value="${jdbc.url}"></property>
        <property name="user" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
        <property name="testConnectionOnCheckout" value="${jdbc.c3p0.testConnectionOnCheckout}"></property>
        <property name="testConnectionOnCheckin" value="${jdbc.c3p0.testConnectionOnCheckin}"></property>
        <property name="idleConnectionTestPeriod" value="${jdbc.c3p0.idleConnectionTestPeriod}"></property>
        <property name="initialPoolSize" value="${jdbc.c3p0.initialPoolSize}"></property>
        <property name="minPoolSize" value="${jdbc.c3p0.minPoolSize}"></property>
        <property name="maxPoolSize" value="${jdbc.c3p0.maxPoolSize}"></property>
        <property name="maxIdleTime" value="${jdbc.c3p0.maxIdleTime}"></property>
    </bean>

    <bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
        <!-- 数据源dataSource -->
        <property name="dataSource" ref="dataSource" />

        <!-- hibernate的配置方案一  -->
        <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
        <!-- hibernate的配置方案二  -->
        <!-- 
        <property name="hibernateProperties"> 
            <props> 
                <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop> 
                <prop key="hibernate.dialect">${hibernate.dialect}</prop> 
                <prop key="hibernate.show_sql">${hibernate.show_sql}</prop> 
                <prop key="hibernate.format_sql">${hibernate.format_sql}</prop> 
                <prop key="hibernate.temp.use_jdbc_metadata_defaults">false</prop> 
            </props> 
        </property>
         -->

        <!-- 持久化类的位置方案一，通过包进行扫描 -->
        <property name="mappingLocations" value="classpath:com/dx/ssh/entities/*.hbm.xml"></property>
        <!-- spring的spring.jar的jar包内，在org.springframework.orm.hibernate3.annotation下， 
            有一个AnnotationSessionFactoryBean类，其中有一个属性叫做"packagesToScan"， 有个方法叫setpackagesToScan()，
        也就是说我可以再spring里面将这个属性给设定上。 
            packagesToScan是"包扫描"的意思，哪些包spring可以给我们扫描一下，看看有哪些实体类，
        这一项在我们在配置文件中配置hibernate的实体类的时候可以这么配，只要给出具体的扫描范围就可以了， 
        不需要将实体类一个一个的写出来 
        -->
        <!-- 持久化类的位置方案二，通过包进行扫描 -->
        <!-- 
        <property name="packagesToScan"> 
            <list> 
                <value>com.dx.ssh.entities</value> 
            </list> 
        </property> 
        -->
        <!-- 持久化类的位置方案三，通过类进行扫描 -->
        <!-- 
        <property name="annotatedClasses"> 
            <list> 
                <value>com.dx.ssh.entities.Member</value> 
                <value>com.dx.ssh.entities.Log</value> 
            </list> 
        </property> 
        -->
    </bean>
    <!-- 配置Hibernate事务管理器 -->
    <bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

    <!-- 配置事务异常封装
    <bean id="persistenceExceptionTranslationPostProcessor" class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />
     -->
    <!-- 基于数据源的事务管理器 -->
    <!-- 
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean> 
     -->
    <!-- 启用注解来管理事务 -->  
    
    <!-- 配合<tx:advice>和<aop:advisor>完成了事务切面的定义 -->
    <!-- 使用强大的切点表达式是语言轻松定义目标方法 -->
    <aop:config proxy-target-class="true">
        <!-- 通过aop定义事务增强切面 -->
        <aop:pointcut expression=" execution(* com.dx.ssh.service..*(..))" id="serviceMethod" />
        <!-- 引用事务增强 -->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod" />
    </aop:config>
    <!-- 事务增强 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <!-- 事务属性定义 -->
        <tx:attributes>
            <tx:method name="*" />
        </tx:attributes>
    </tx:advice>
    
    <!-- 第一种方式: 注解方式配置事物 
    <tx:annotation-driven transaction-manager="transactionManager" />
    -->
</beans>

View Code

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>
        <!--
        把一下配置信息转移到jdbc.properties中。
        <property name="hibernate.connection.username">root</property>
        <property name="hibernate.connection.password">123456</property>
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql://localhost/my_ssh</property>
        -->

        <property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
        <property nameSpring：Spring&Struts2&Hibernate搭建的blog项目
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 Struts2与Spring整合

Spring：Spring&Struts2&Hibernate整合后，实现查询Employee信息

背景：

新建Employee,Department实体类，并添加对应类的hibernate实体配置文件

添加Dao、Service、Action，并配置相关配置文件