学习：SSH整合学习笔记（xml配置版，后期更新注解版）

提示：

本文是SSH整合中的笔记，所以在记录时，配置内容有所省略，所以建议SSH零基础者慎之，以防因某一步错误而不得完成此demo，尽量不误人子弟！

SSH整合，整合Struts2、Hibernate和Spring（只是简单整合的demo，故没有涉及事务部分的内容，Struts拦截器等），测试内容为简单的用户登录和查询两个功能

有完整源码，测试请自行建立Oracle表（字段参考show.jsp页面）

源码bdy链接：https://pan.baidu.com/s/1erU0F4RtSywx9TfhSDuY3Q 密码：76i8

链接失效请联系我更新。

整合思路

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整合概述： Struts对MVC封装、Hibernate完成持久层，两者都应交给Spring管理，先整合Hibernate和Spring
整合流程：
1、将原来Hibernate的cfg文件（配置文件）交给Spring管理（Spring配置dataSource)：得到数据源
2、Spring核心为sessionFactory：得到sessionFactory
3、建立DAO、Action、Entity等
4、建立Test测试

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Hibernate内容包含了两个xml文件：
1、cfg文件（引用hbm，包含数据库配置url，driver、user、pwd、etc……）
2、hbm文件（实体映射）
Struts内容包含1个xml文件：struts.xml
整合完毕包含四个xml文件（四类文件：entity每个都会对应hbm文件）：web.xml、cfg、hbm、struts

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整合准备：
1、建立web项目
2、导入Strust2、Hibernate和Spring包（注意导入reference包）（jar存在多个版本，选择较高版本）
3、建立xml（共4类）文件：src下建立applicationContext.xml 配置 <bean>
4、参考jar包(37个）

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注意：applicationContext.xml按照流程分开书写，分为得到数据源、得到sessionFactory、整合action、dao配置等
完整配置、源码参考链接。

1、得到数据源

applicationContext.xml（第一部分）

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" >
    <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"></property>
    <property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl"></property>
    <property name="username" value="scott"></property>
    <property name="password" value="tiger"></property>    
  </bean>

2、得到sessionFactory

applicationContext.xml（第二部分）

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource"></property>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.show_sql">true</prop>
        </props>
    </property>
    <property name="mappingResources">
        <list>
            <value>com/it/ssh/entity/Person.hbm.xml</value>
        </list>
    </property>
  </bean>
  <!--整合完毕后，DAO,SERVICE要做一下配置（即第三部分）-->

  <bean id="personDao" class="com.it.ssh.dao.impl.PersonDaoImpl">
    <property name="sessionFactory" ref="sessionFactory"></property>
  </bean>
  <bean id="personService" class="com.it.ssh.service.impl.PersonServiceImpl">
    <property name="personDao" ref="personDao"></property>
  </bean>
  <!--整合了Struts之后，不能直接找action，没有personService会有空指针异常。应该先找到Spring配置文件中的内容-->
  <bean name="personAction" class="com.it.ssh.action.PersonAction">
    <property name="personService" ref="personService"></property>
  </bean>

3、Struts.xml

<struts>

    <constant name="struts.enable.DynamicMethodInvocation" value="true" />
    <constant name="struts.devMode" value="true" />

    <package name="default" namespace="/" extends="struts-default">

        <default-action-ref name="index" />

        <global-results>
            <result name="error">/WEB-INF/jsp/error.jsp</result>
        </global-results>

        <global-exception-mappings>
            <exception-mapping exception="java.lang.Exception" result="error"/>
        </global-exception-mappings>

        <action name="personAction" class="personAction">
            <result>show.jsp</result>
            <result name="input" type="redirect">login.jsp</result>
        </action>
    </package>

    <include file="example.xml"/>

    <!-- Add packages here -->

</struts>

4、person.hbm.xml

<hibernate-mapping package="com.it.ssh.entity">
    <class name="Person">
        <id name="pid" type="int">
            <generator class="sequence">
                <param name="sequence">se_per</param>
            </generator>
        </id>
        <property name="pname" type="string"  />
        <property name="pwd" type="string"></property>
    </class>
</hibernate-mapping>

5、web.xml

<display-name>ssh</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <!--注意：服务器启动时就应该先加载applicationContext.xml-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <!--配置application文件位置时注意：应该为：WEB-INFO/classes/applicationContext.xml或classpath:applicationContext.xml-->
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  <listener>
    <listener-class>
    org.springframework.web.context.ContextLoaderListener
    </listener-class>
  </listener>
    <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>
    <!--error-page可设置error页,
    Struts中global result的配置最终执行到这里，后面覆盖前面的设置内容-->
    <!-- <error-page>
        <error-code>404</error-code>
        <location>……</location>
    </error-page> -->
</web-app>

6、entity

public class Person {
    private int pid;
    private String pname;
    private String pwd;
    public Person() {
        // TODO Auto-generated constructor stub
    }
    public Person(int pid, String pname, String pwd) {
        super();
        this.pid = pid;
        this.pname = pname;
        this.pwd = pwd;
    }
    public int getPid() {
        return pid;
    }
    public void setPid(int pid) {
        this.pid = pid;
    }
    public String getPname() {
        return pname;
    }
    public void setPname(String pname) {
        this.pname = pname;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }


}

7、DAO

7.1、com.dao

public interface PersonDao {
    public boolean login(Person person);
    public boolean add(Person person);
    public boolean update(Person person);
    public boolean delete(int pid);
    public Person queryById(int pid);
    public List<Person> queryAll();


}

7.2、com.dao.impl

  public class PersonDaoImpl implements PersonDao {
    private SessionFactory sessionFactory;


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

    @Override
    public boolean login(Person person) {
        String hql="from Person where pid=? and pwd=?";
        Session session=sessionFactory.openSession();
        Query q=session.createQuery(hql);
        q.setInteger(0, person.getPid());
        q.setString(1, person.getPwd());
        Object obj=q.uniqueResult();
        boolean flag=false;
        if(obj!=null){
            flag=true;
        }
        session.close();
        return flag;
    }

    @Override
    public boolean add(Person person) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean update(Person person) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean delete(int pid) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public Person queryById(int pid) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public List<Person> queryAll() {
        String hql="from Person";
        Session session=sessionFactory.openSession();
        Query q=session.createQuery(hql);
        List<Person> list=q.list();
        session.close();
        return list;
    }

}

8、action

public class PersonAction extends ActionSupport implements ModelDriven<Person> {
    Person person=new Person();
    private PersonService personService;

    public void setPersonService(PersonService personService) {
        this.personService = personService;
    }
    private List<Person> list;

    public List<Person> getList() {
        return list;
    }
    public void setList(List<Person> list) {
        this.list = list;
    }
    @Override
    public Person getModel() {
        // TODO Auto-generated method stub
        return person;
    }
    public String login() throws Exception {
        boolean flag=personService.login(person);
        String path=INPUT;
        if(flag){
            path=SUCCESS;
            queryAll();
        }
        return path;
    }
    public String queryAll() throws Exception {
        list=personService.queryAll();      
        return "success";
    }


}

9、service

9.1、com.service

public interface PersonService {
    public boolean login(Person person);
    public boolean add(Person person);
    public boolean update(Person person);
    public boolean delete(int pid);
    public Person queryById(int pid);
    public List<Person> queryAll();

}

9.2、com.service.impl

public class PersonServiceImpl implements PersonService {
    private PersonDao personDao;

    public void setPersonDao(PersonDao personDao) {
        this.personDao = personDao;
    }

    @Override
    public boolean login(Person person) {
        // TODO Auto-generated method stub
        return personDao.login(person);
    }

    @Override
    public boolean add(Person person) {
        // TODO Auto-generated method stub
        return personDao.add(person);
    }

    @Override
    public boolean update(Person person) {
        // TODO Auto-generated method stub
        return personDao.update(person);
    }

    @Override
    public boolean delete(int pid) {
        // TODO Auto-generated method stub
        return personDao.delete(pid);
    }

    @Override
    public Person queryById(int pid) {
        // TODO Auto-generated method stub
        return personDao.queryById(pid);
    }

    @Override
    public List<Person> queryAll() {
        // TODO Auto-generated method stub
        return personDao.queryAll();
    }

}

10、Test

public class Test {

    public static void main(String[] args) {
        ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml");
        PersonService personService=(PersonService)ac.getBean("personService");
        Person person=new Person(10025, "tom", "123456");
        boolean flag=personService.login(person);
        System.out.println(flag);

    }

}

11、login.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<s:form action="personAction!login" method="post">
    <s:textfield name="pid" label="帐号"></s:textfield>
    <s:password name="pwd" label="密码"></s:password>
    <tr>
        <td colspan="2">
            <s:submit value="提交" theme="simple"></s:submit>
            <s:reset value="重置" theme="simple"></s:reset>
        </td>
    </tr>
</s:form>

</body>
</html>

12.show.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<table border="1" width="300px">
    <tr>
        <th>编号</th>
        <th>姓名</th>
        <th>密码</th>
    </tr>
    <s:iterator value="list" >
        <tr>
            <td><s:property value="pid"/></td>
            <td><s:property value="pname"/></td>
            <td><s:property value="pwd"/></td>
        </tr>
    </s:iterator>
</table>

</body>
</html>

后记：SSH简单整合、包含连接Oracle登录用户、queryall两个功能。有不足之处还望海涵，欢迎指正错误！
可联系[email protected]作以学习交流。