SSH整合

Posted 2020-07-26 十三弦

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需求：

查询员工和所属部门

1.引入jar包

hibernate

struts

spring-core

spring-aop

spring-orm

spring-web

2.实体类及映射文本配置

Dept

public class Dept {
    private int deptId;
    private String deptName;
    set...
    get...
}

Dept.hbm.xml

<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.juaner.entity">
    <class name="Dept" table="t_dept">
        <id name="deptId" column="depId">
            <generator class="native"/>
        </id>
        <property name="deptName"/>
    </class>

</hibernate-mapping>

Employee

public class Employee {
    private int empId;
    private String empName;
    private double salary;
    private Dept dept;
    set...
    get...
}

Employee.hbm.xml

<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.juaner.entity">
    <class name="Employee" table="t_employee">
        <id name="empId">
            <generator class="native"/>
        </id>
        <property name="empName"/>
        <property name="salary"/>
        <many-to-one name="dept" class="Dept" column="dept_id"/>
    </class>

</hibernate-mapping>

3.dao、service和action

EmployeeDao

public class EmployeeDao {
//    注入sessionfactory
    private SessionFactory sessionFactory;

    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }
    public Employee findById(Serializable id){
        return (Employee) this.sessionFactory.getCurrentSession().get(Employee.class,id);
    }
}

EmployeeService

public class EmployeeService {
    private EmployeeDao employeeDao;

    public void setEmployeeDao(EmployeeDao employeeDao) {
        this.employeeDao = employeeDao;
    }
    public Employee findById(Serializable id){
        return employeeDao.findById(id);
    }
}

EmployeeAction

public class EmployeeAction extends ActionSupport{
    private EmployeeService employeeService;

    public void setEmployeeService(EmployeeService employeeService) {
        this.employeeService = employeeService;
    }

    @Override
    public String execute() throws Exception {
        int empid= 3;
        Employee employee = employeeService.findById(empid);

        Map<String, Object> request = ActionContext.getContext().getContextMap();
        request.put("employee",employee);
        return SUCCESS;
    }
}

4.struts和spring相关配置

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
    <!--struts配置-->
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!--Spring配置-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:bean*.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
</web-app>

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>
    <package name="emp" extends="struts-default">
        <!--action实例交给spring去创建-->
        <action name="show" class="employeeAction">
            <result name="success">/show.jsp</result>
        </action>
    </package>
</struts>

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

    <!--所有配置的公共部分-->
    <!--连接池-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql:///test"></property>
        <property name="user" value="root"></property>
        <property name="password" value="juaner767"></property>
        <property name="initialPoolSize" value="3"></property>
        <property name="maxPoolSize" value="6"/>
    </bean>
    <!--sessionfactory-->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--hibernate常用配置-->
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>
        <property name="mappingLocations">
            <list>
                <value>classpath:com/juaner/entity/*.hbm.xml</value>
            </list>
        </property>
    </bean>
    <!--事务配置-->
    <!--事务管理器-->
    <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"/>
    </bean>
    <!--事务增强-->
    <tx:advice id="txAdvice" transaction-manager="txManager">
        <tx:attributes>
            <tx:method name="*" read-only="false"/>
        </tx:attributes>
    </tx:advice>
    <!--aop配置-->
    <aop:config>
        <aop:pointcut id="pt" expression="execution(* com.juaner.service.*.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
    </aop:config>
</beans>

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

    <bean id="productDao" class="com.juaner.dao.ProductDao">
        <property name="sessionFactory" ref="sessionFactory"/>
    </bean>
    <bean id="employeeDao" class="com.juaner.dao.EmployeeDao">
        <property name="sessionFactory" ref="sessionFactory"/>
    </bean>
</beans>

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

    <bean id="productService" class="com.juaner.service.ProductService">
        <property name="productDao" ref="productDao"/>
    </bean>
    <bean id="employeeService" class="com.juaner.service.EmployeeService">
        <property name="employeeDao" ref="employeeDao"/>
    </bean>
</beans>

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

    <!--scope=prototype 用的时候创建实例-->
    <bean id="employeeAction" class="com.juaner.EmployeeAction" scope="prototype">
        <property name="employeeService" ref="employeeService"/>
    </bean>
</beans>

5.显示页面

show.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<html>
  <head>
    <title>显示员工信息</title>
  </head>
  <body>
  员工：${employee.empName}<br>
  薪水：${employee.salary}<br>
  </body>
</html>

6.为了访问懒加载数据dept，需要配置open session in view

    <!--配置spring的open session in view 为了在jsp中使用懒加载数据-->
    <filter>
        <filter-name>OpenSessionInView</filter-name>
        <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>OpenSessionInView</filter-name>
        <url-pattern>*.action</url-pattern>
    </filter-mapping>

结果：

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