SSH的简单整合
本文通过ssh三大框架实现一个小demo,通过查询在jsp页面显示员工信息
整合步骤：（Eclipse 新建javaweb工程）
1. 引入SSH Jar文件
Struts 核心jar
Hibernate 核心jar
Spring
Core 核心功能
Web 对web模块支持
Aop aop支持
Orm 对hibernate支持
Jdbc/tx jdbc支持包、事务相关包
2. 配置
Web.xml 初始化struts功能、spring容器
Struts.xml 配置请求路径与映射action的关系
Spring.xml IOC容器配置
bean-base.xml 【公用信息】
bean-service.xml
bean-dao.xml
bean-action.xml
3. 开发
Entity/Dao/service/action
- 部门实体类
package cn.zhongkai.entity;
public class Dept {
private int id;
private String name;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
- 部门类对应映射文件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="cn.zhongkai.entity">
<class name="Dept" table="t_dept">
<id name="id" column="deptId">
<generator class="native"></generator>
</id>
<property name="name" column="deptName"></property>
</class>
</hibernate-mapping>
- 员工实体类
package cn.zhongkai.entity;
public class Employee {
private int id;
private String empName;
private double salary;
private Dept dept;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getEmpName() {
return empName;
}
public void setEmpName(String empName) {
this.empName = empName;
}
public double getSalary() {
return salary;
}
public void setSalary(double salary) {
this.salary = salary;
}
public Dept getDept() {
return dept;
}
public void setDept(Dept dept) {
this.dept = dept;
}
}
- 员工类对应映射文件
<?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="cn.zhongkai.entity">
<class name="Employee" table="t_employee">
<id name="id" column="empId">
<generator class="native"></generator>
</id>
<property name="empName"></property>
<property name="salary"></property>
<!-- 多对一 -->
<many-to-one name="dept" column="dept_id" class="Dept"></many-to-one>
</class>
</hibernate-mapping>
- dao层
package cn.zhongkai.dao;
import java.io.Serializable;
import org.hibernate.SessionFactory;
import cn.zhongkai.entity.Employee;
public class EmployeeDao {
// 注入SessionFactory对象
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
/**
* 查询
* @param emp
*/
public Employee findById(Serializable id) {
return (Employee) sessionFactory.getCurrentSession().get(Employee.class, id);
}
}
- service层
package cn.zhongkai.service;
import java.io.Serializable;
import org.hibernate.SessionFactory;
import cn.zhongkai.dao.EmployeeDao;
import cn.zhongkai.entity.Employee;
public class EmployeeService {
// IOC注入
private EmployeeDao employeeDao;
public void setEmployeeDao(EmployeeDao employeeDao) {
this.employeeDao = employeeDao;
}
/**
* 查询
* @param emp
*/
public Employee findById(Serializable id) {
Employee emp = employeeDao.findById(id);
return emp;
}
}
- action层
package cn.zhongkai.action;
import java.util.Map;
import cn.zhongkai.entity.Employee;
import cn.zhongkai.service.EmployeeService;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class EmployeeAction extends ActionSupport{
// IOC容器注入
private EmployeeService employeeService;
public void setEmployeeService(EmployeeService employeeService) {
this.employeeService = employeeService;
}
@Override
public String execute(){
int empid = 11;
// 调用Service
Employee emp = employeeService.findById(empid);
// 保存到request
Map<String,Object> request = (Map<String, Object>) ActionContext.getContext().get("request");
request.put("emp", emp);
return SUCCESS;
}
}
- 配置web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<!-- 配置spring的OpenSessionInView模式 【目的：JSp页面访问懒加载数据】 -->
<!-- 注意：访问struts时候需要带上*.action后缀 -->
<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>
<!-- struts2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>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
- struts配置文件
<?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容器创建 -->
<action name="show" class="employeeAction" method="execute">
<result name="success">/index.jsp</result>
</action>
</package>
</struts>
*index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
员工： ${emp.empName }
部门： ${emp.dept.name }
</body>
</html>
- pring配置文件
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:p="http://www.springframework.org/schema/p"
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">
<!-- 所有配置的公共部门 -->
<!-- 1) 连接池实例 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql:///hib_demo"></property>
<property name="user" value="root"></property>
<property name="password" value="root"></property>
<property name="initialPoolSize" value="3"></property>
<property name="maxPoolSize" value="6"></property>
</bean>
<!-- 2) SessionFactory实例创建 -->
<!-- 所有的配置都由spring维护(项目中不需要hibernate.cfg.xml啦) -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<!-- a. 连接池 -->
<property name="dataSource" ref="dataSource"></property>
<!-- b. hibernate常用配置： 方言、显示sql、自动建表等 -->
<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>
<!-- c. 映射配置 -->
<property name="mappingLocations">
<list>
<value>classpath:cn/zhongkai/entity/*.hbm.xml</value>
</list>
</property>
</bean>
<!-- 3) 事务配置 -->
<!-- # 事务管理器 -->
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"></property>
</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 expression="execution(* cn.zhongkai.service.*.*(..))" id="pt"/>
<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:p="http://www.springframework.org/schema/p"
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="employeeDao" class="cn.zhongkai.dao.EmployeeDao">
<property name="sessionFactory" ref="sessionFactory"></property>
</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:p="http://www.springframework.org/schema/p"
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="employeeService" class="cn.zhongkai.service.EmployeeService">
<property name="employeeDao" ref="employeeDao"></property>
</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:p="http://www.springframework.org/schema/p"
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="employeeAction" class="cn.zhongkai.action.EmployeeAction" scope="prototype">
<property name="employeeService" ref="employeeService"></property>
</bean>
</beans>