SSH案例--入门级

1.项目功能展示

（1）注册

　　

（2）修改地址与级别信息，点击修改

　　 

（3）再添加一位成员，进行删除

点击第二行的删除

（4）登录模块测试

输入数据库中没有的信息：

输入数据库中存在的信息：

　　

2. Web.xml

　　Spring提供了ContextLoaderListener，该监听器实现了ServletContextListener接口，他在Web应用程序启动时被触发。当他创建时会自动查找WEB-INF/下的applicationContext.xml，所以当只有一个配置文件且文件名为applicationContext.xml时，则只需要在web.xml文件中配置ContextLoaderListener监听器即可.当有多个配置文件需要载入，则应该使用<context-param>元素指定配置文件的文件名，ContextLoaderListener加载时，会查找名为contextConfigLocation的初始化参数。当Web应用程序启动时先读取web.xml文件，然后创建spring容器，之后根据配置文件内容，装配Bean实例。

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>ssh</display-name>
  <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>
  
  
 <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  
  <context-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>/WEB-INF/applicationContext.xml</param-value>
  </context-param>

  <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>
</web-app>

3. 实体类与其映射文件

（1）Member.java

package com.entity;

public class Member {
    private long id;
    private String name;
    private String password;
    private String address;
    private String email;
    private int level;
    public Member(){}
    public Member(String name,String password,String address,String email,int level){
        this.name = name;
        this.password = password;
        this.address = address;
        this.email = email;
        this.level = level;
    }
    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public int getLevel() {
        return level;
    }
    public void setLevel(int level) {
        this.level = level;
    }
    
}

（2）Member.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <class name="com.entity.Member" table="MEMBER">
        <id name="id" type="long">
            <column name="ID" />
            <generator class="identity" />
        </id>
        <property name="name" type="java.lang.String">
            <column name="NAME" />
        </property>
        <property name="password" type="java.lang.String">
            <column name="PASSWORD" />
        </property>
        <property name="address" type="java.lang.String">
            <column name="ADDRESS" />
        </property>
        <property name="email" type="java.lang.String">
            <column name="EMAIL" />
        </property>
        <property name="level" type="int">
            <column name="LEVEL" />
        </property>
    </class>
</hibernate-mapping>

4.DAO层

（1）接口MemberDAO.java

package com.dao;

import java.util.List;

import com.entity.Member;

public interface MemberDAO {
    public void add(Member member);
    public void update(Member member);
    public void delete(long id);
    public Member findByName(String name,String password);
    public Member findById(long id);
    public List<Member> findAll();

}

（2）实现类MemberDAOImpl.java(sessionFactory通过构造方法注入，使其可以操作数据库)

package com.dao;

import java.util.List;

import com.entity.Member;
import org.hibernate.*;
import org.springframework.beans.factory.annotation.Autowired;
public class MemberDAOImpl implements MemberDAO {
    
    private SessionFactory sessionFactory;
    
    //构造方法注入SessionFactory对象
    public MemberDAOImpl(SessionFactory sessionFactory) {
        this.sessionFactory=sessionFactory;
    }
    
    //使用SessionFactory对象返回Session对象
    public Session currentSession(){
        return sessionFactory.openSession();
    }
    @Override
    public void add(Member member) {
        Session session=null;
        try {
            session=currentSession();
            Transaction tx = session.beginTransaction();
            session.save(member);
            tx.commit();
        } catch (HibernateException e) {
            e.printStackTrace();
        }finally{
            session.close();
        }

    }

    @Override
    public void update(Member member) {
        Session session=null;
        try {
            session=currentSession();
            Transaction tx = session.beginTransaction();
            session.update(member);
            tx.commit();
        } catch (HibernateException e) {
            e.printStackTrace();
        }finally{
            session.close();
        }

    }

    @Override
    public void delete(long id) {
        Session session=null;
        try {
            session=currentSession();
            Transaction tx = session.beginTransaction();
            Member mb = (Member)session.get(Member.class, id);
            session.delete(mb);
            tx.commit();
        } catch (HibernateException e) {
            e.printStackTrace();
        }finally{
            session.close();
        }

    }

    @Override
    public Member findByName(String name, String password) {
        Session session=null;
        Member result = null;
        try {
            session=currentSession();
            Transaction tx = session.beginTransaction();
            String hsql = " from Member m where m.name = :mname and m.password = :mpassword";
            Query query = session.createQuery(hsql);
            query.setParameter("mname", name);
            query.setParameter("mpassword", password);
            result = (Member)query.uniqueResult();
            tx.commit();
        } catch (HibernateException e) {
            e.printStackTrace();
        }finally{
            session.close();
        }
        return result;
    }

    @Override
    public Member findById(long id) {
        Session session=null;
        Member result = null;
        try {
            session=currentSession();
            Transaction tx = session.beginTransaction();
            String hsql = " from Member m where m.id = :id";
            Query query = session.createQuery(hsql);
            query.setParameter("id",id);
            result = (Member)query.uniqueResult();
            tx.commit();
        } catch (HibernateException e) {
            e.printStackTrace();
        }finally{
            session.close();
        }
        return result;
    }

    @Override
    public List<Member> findAll() {
        Session session=null;
        List<Member> list = null;
        try {
            session=currentSession();
            Transaction tx = session.beginTransaction();
            String hsql = " from Member";
            Query query = session.createQuery(hsql);
            list = query.list();
            tx.commit();
        } catch (HibernateException e) {
            e.printStackTrace();
        }finally{
            session.close();
        }
        return list;
    }

}

5.业务逻辑层

（1）接口MemberService.java

package com.service;
import java.util.List;
import com.entity.Member;
public interface MemberService {
    public void add(Member member);
    public void update(Member member);
    public void delete(long id);
    public Member findByName(String name,String password);
    public Member findById(long id);
    public List<Member> findAll();
}

（2）实现类MemberServiceImpl.java(设值注入DAO层组件)

package com.service;

import java.util.List;

import com.dao.MemberDAO;
import com.entity.Member;

public class MemberServiceImpl implements MemberService {
    private MemberDAO memberDao;
    //设值注入DAO对象
    public void setMemberDao(MemberDAO memberDao) {
        this.memberDao = memberDao;
    }

    @Override
    public void add(Member member) {
        if(memberDao.findById(member.getId())==null)
            memberDao.add(member);

    }

    @Override
    public void update(Member member) {
        if(memberDao.findById(member.getId())!=null)
            memberDao.update(member);

    }

    @Override
    public void delete(long id) {
        if(memberDao.findById(id)!=null)
            memberDao.delete(id);

    }

    @Override
    public Member findByName(String name, String password) {
        return memberDao.findByName(name, password);
    }

    @Override
    public Member findById(long id) {
        return memberDao.findById(id);
    }

    @Override
    public List<Member> findAll() {
        return memberDao.findAll();
    }

}

6. Action类

（1）注册MemberRegisterAction.java（设值注入业务逻辑组件）

package com.action;

import com.entity.Member;
import com.opensymphony.xwork2.ActionSupport;
import com.service.MemberService;

public class MemberRegisterAction extends ActionSupport {
    private Member member;
    private MemberService memberService;
    public Member getMember() {
        return member;
    }
    public void setMember(Member member) {
        this.member = member;
    }
    //注入业务逻辑组件
    public void setMemberService(MemberService memberService) {
        this.memberService = memberService;
    }
    public String execute(){
        memberService.add(member);
        return SUCCESS;
    }
    
}

（2）删除MemberDeleteAction.java(设置注入业务逻辑组件，注意传入参数id的相应getter和setter方法)

package com.action;

import com.opensymphony.xwork2.ActionSupport;
import com.service.MemberService;

public class MemberDeleteAction extends ActionSupport {
    private MemberService memberService;

    public void setMemberService(MemberService memberService) {
        this.memberService = memberService;
    }
    
    private long id;


    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }

    public String execute(){
        memberService.delete(getId());
        return SUCCESS;
    }
}

（3）查询MemberQueryAction.java(用于查看所有会员信息)

package com.action;

import java.util.List;

import org.apache.struts2.ServletActionContext;

import com.entity.Member;
import com.opensymphony.xwork2.ActionSupport;
import com.service.MemberService;

public class MemberQueryAction extends ActionSupport {
    private MemberService memberService;

    public void setMemberService(MemberService memberService) {
        this.memberService = memberService;
    }
    public String execute(){
        List<Member> list = memberService.findAll();
        ServletActionContext.getRequest().setAttribute("memberList", list);
        return SUCCESS;
    }
}

（4）修改MemberUpdateAction.java(有两个方法，execute（）和showMember（），当需要修改时，showMember（）方法转向update.jsp.并设置好需要修改的对象，修改完成之后，由spring托管的memberUpdateAction组件执行execute方法进行update操作)

package com.action;

import com.entity.Member;
import com.opensymphony.xwork2.ActionSupport;
import com.service.MemberService;

public class MemberUpdateAction extends ActionSupport {
    private MemberService memberService;
    private Member member;
    private long id;
    public void setMemberService(MemberService memberService) {
        this.memberService = memberService;
    }
    public Member getMember() {
        return member;
    }
    public void setMember(Member member) {
        this.member = member;
    }
    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    public String showMember(){
        Member mb = memberService.findById(getId());
        setMember(mb);
        return SUCCESS;
    }
    public String execute(){
        memberService.update(member);
        return SUCCESS;
    }
}

（5）登录MemberLoginAction.java（将输入的信息与数据库中进行比较）

package com.action;

import com.entity.Member;
import com.opensymphony.xwork2.ActionSupport;
import com.service.MemberService;

public class MemberLoginAction extends ActionSupport {
    private Member member;
    private MemberService memberService;
    public Member getMember() {
        return member;
    }
    public void setMember(Member member) {
        this.member = member;
    }
    //注入业务逻辑组件
    public void setMemberService(MemberService memberService) {
        this.memberService = memberService;
    }
    
    public String execute(){
        Member mb =memberService.findByName(member.getName(), member.getPassword());
        if(mb!=null)
            return SUCCESS;
        else
            return ERROR;
    }
}

7.struts.xml

　　spring托管将Struts2中的Action的实例化工作交由Spring容器统一管理，同时使Struts2中的Action实例能够访问Spring提供的业务逻辑资源，spring容器依赖注入的优势也可以体现，Struts2提供的spring插件struts2-spring-plugin-2.3.16.3.jar配合<constant name="struts.objectFactory" value="spring">使得Struts2的action由Spring来负责进行实例化.

<?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.devMode" value="true" />
    
    <constant name="struts.objectFactory" value="spring"></constant>
    
    <package name="default" namespace="/" extends="struts-default">
        <!-- class属性值是spring定义的Bean，当执行execute（）返回success时，控制转到另一个动作memberQuery -->
        <action name="memberRegister" class="memberRegisterAction">
            <result name="success" type="redirectAction">/memberQuery</result>
        </action>
        
        <action name="memberLogin" class="memberLoginAction">
            <result name="success">/welcome.jsp</result>
            <result name="error">/register.jsp</result>
        </action>
        
        <action name="memberQuery" class="memberQueryAction">
            <result name="success">/displayAll.jsp</result>
        </action>
        
        <action name="memberDelete" class="memberDeleteAction">
            <result name="success" type="redirectAction">/memberQuery</result>
        </action>
        
        <action name="memberShow" class="memberUpdateAction" method="showMember">
            <result name="success">/update.jsp</result>
        </action>
        
        <action name="memberUpdate" class="memberUpdateAction">
            <result name="success" type="redirectAction">/memberQuery</result>
        </action>
    </package>
</struts>

8.applicationContext.xml

　　spring 框架提供了多种数据源类，可以使用spring提供的DriverManagerDataSource类还可以使用第三方数据源，如C3P0的ComboPooledDataSource数据源类，注意相应的两个jar包c3p0-0.9.2.1.jar mchange-commons-java-0.2.3.4.jar.

　　Hibernate4已经完全实现自己的事物管理，所以spring4不提供HibernateDaoSupport和HibernateTemplete的支持。可以在应用程序的spring上下文中，像配置其他bean那样来配置HibernateSession工厂。如果要使用XML文件定义对象与数据库之间的映射，则需要在spring中配置LocalSessionFactoryBean。hibernateProperties属性配置了Hibernate如何进行操作的细节。"hibernate.current_session_context_class"是为当前Session提供一个策略，Session由org.springframework.orm.hibernate4.SpringSessionContext.currentSession得到。将sessionFactory注入到其他Bean中，如注入到DAO组件中，使其获得SessionFactory的引用后，就可以实现对数据库的访问。

<?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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd  
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-4.3.xsd">


    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/zzh?useUnicode=true&amp;characterEncoding=UTF-8"/>
        <property name="user" value="root"/>
        <property name="password" value="root"/>
        <property name="maxPoolSize" value="40"/>
        <property name="minPoolSize" value="1"/>
        <property name="initialPoolSize" value="2"/>
        <property name="maxIdleTime" value="20"/>
    </bean>
    
    <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="mappingResources">
            <list>
                <value>com/entity/Member.hbm.xml</value>
            </list>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
                <prop key="hibernate.temp.use_jdbc_metadata_defaults">false</prop>
                <prop key="hibernate.current_session_context_class">
                    org.springframework.orm.hibernate4.SpringSessionContext
                </prop>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
            </props>
        </property>
    </bean>
    
    
    <bean id="memberDao" class="com.dao.MemberDAOImpl">
    <!-- 构造方法注入会话工厂组件sessionFactory -->
        <constructor-arg>
            <ref bean="sessionFactory"/>
        </constructor-arg>
    </bean>
    
    
    <bean id="memberService" class="com.service.MemberServiceImpl">
    <!-- 设值注入DAO组件 -->
        <property name="memberDao" ref="memberDao"></property>
    </bean>
    
    
    <bean id="memberRegisterAction" class="com.action.MemberRegisterAction">
    <!-- 设值注入业务逻辑组件 -->
        <property name="memberService" ref="memberService"></property>
    </bean>
    
    <bean id="memberLoginAction" class="com.action.MemberLoginAction">
        <property name="memberService" ref="memberService"></property>
    </bean>
    
    <bean id="memberQueryAction" class="com.action.MemberQueryAction">
        <property name="memberService" ref="memberService"></property>
    </bean>
    
    <bean id="memberDeleteAction" class="com.action.MemberDeleteAction">
        <property name="memberService" ref="memberService"></property>
    </bean>
    
    <bean id="memberUpdateAction" class="com.action.MemberUpdateAction">
        <property name="memberService" ref="memberService"></property>
    </bean>
</beans>

9.jsp

（1）注册register.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>会员注册页面</title>
</head>
<body>
    <s:form action="memberRegister" method="post">
        <h4><s:text name="欢迎注册会员"></s:text></h4>
        <s:property value="exception.message"/>
        <s:textfield name="member.name" label="会员姓名" tooltip="Enter your name!" required="true"></s:textfield>
        <s:password name="member.password" label="会员口令" tooltip="Enter your password!"></s:password>
        <s:textfield name="member.address" label="会员地址"></s:textfield>
        <s:textfield name="member.email" label="会员邮箱"></s:textfield>
        <s:textfield name="member.level" label="会员级别"></s:textfield>
        <s:submit value="提交"/>
    </s:form>
</body>
</html>

（2）所有会员信息displayAll.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>显示会员信息</title>
</head>
<body>
    <h4>会员信息</h4>
    <table border='1'>
        <tr>
            <td>会员id</td><td>会员名</td><td>密码</td><td>地址</td><td>邮箱</td><td>级别</td><td>删除</td><td>修改</td>
        </tr>
            <s:iterator value="#request.memberList" id="mb">
                <tr>
                    <td><s:property value="#mb.id"/></td>
                    <td><s:property value="#mb.name"/></td>
                    <td><s:property value="#mb.password"/></td>
                    <td><s:property value="#mb.address"/></td>
                    <td><s:property value="#mb.email"/></td>
                    <td><s:property value="#mb.level"/></td>
                    
                    <td>
                        <a href="<s:url action="memberDelete"><s:param name="id"><s:property value="#mb.id"/></s:param>
                        </s:url>">删除</a>
                    </td>
                    <td>
                        <a href="<s:url action="memberShow"><s:param name="id"><s:property value="#mb.id"/></s:param>
                        </s:url>">修改</a>
                    </td>
                </tr>
            </s:iterator>
    </table>
    <a href="register.jsp">返回注册页面</a>
</body>
</html>

（3）修改页面update.jsp

　　注意：不允许修改会员id，当需要将会员id传递给更新会员动作，所以使用隐藏表单域标签来接收显示会员页面传递来的会员id在update.jsp页面提交时再传递给更新会员的动作memberUpdate。

<%@ 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>修改会员信息</title>
</head>
<body>
    <s:form action="memberUpdate" method="post">
        <h4><s:text name="修改会员信息"></s:text></h4>
        <s:actionerror/>
        
        <s:hidden name="member.id" value="%{member.id}"></s:hidden>
        <s:textfield name="member.name" label="会员姓名" required="true"></s:textfield>
        <s:textfield name="member.password" label="会员口令"></s:textfield>
        <s:textfield name="member.address" label="会员地址"></s:textfield>
        <s:textfield name="member.email" label="会员邮箱"></s:textfield>
        <s:textfield name="member.level" label="会员级别"></s:textfield>
        <s:submit value="提交"/>
    </s:form>
</body>
</html>

（4）登录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>会员登录</title>
</head>
<body>
    <s:form action="memberLogin" method="post">
        <s:textfield name="member.name" label="会员姓名"></s:textfield>
        <s:password name="member.password" label="会员口令"></s:password>
        <s:submit value="提交"></s:submit>
    </s:form>
</body>
</html>

（5）welcome.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!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>贵宾你好！</title>
</head>
<body>
    合法成员
</body>
</html>

10. END

　　github地址：（https://github.com/byzhaozihan/s2sh_entry-level）

　　本篇案例算是最简单的ssh整合，注入形式也都一目了然，如果对你有帮助，请点赞或关注我，谢谢观看！