SSH案例--入門級

本文轉載自查看原文 2016-09-21 18:45 10623 SSH

1.項目功能展示

（1）注冊

（2）修改地址與級別信息，點擊修改

（3）再添加一位成員，進行刪除

點擊第二行的刪除

（4）登錄模塊測試

輸入數據庫中沒有的信息：

輸入數據庫中存在的信息：

2. Web.xml

　　Spring提供了ContextLoaderListener，該監聽器實現了ServletContextListener接口，他在Web應用程序啟動時被觸發。當他創建時會自動查找WEB-INF/下的applicationContext.xml，所以當只有一個配置文件且文件名為applicationContext.xml時，則只需要在web.xml文件中配置ContextLoaderListener監聽器即可.當有多個配置文件需要載入，則應該使用<context-param>元素指定配置文件的文件名，ContextLoaderListener加載時，會查找名為contextConfigLocation的初始化參數。當Web應用程序啟動時先讀取web.xml文件，然后創建spring容器，之后根據配置文件內容，裝配Bean實例。

<?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>

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3. 實體類與其映射文件

（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;
    }
    
}

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（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>

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4.DAO層

（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();

}

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（2）實現類MemberDAOImpl.java(sessionFactory通過構造方法注入，使其可以操作數據庫)

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;
    
    //構造方法注入SessionFactory對象
    public MemberDAOImpl(SessionFactory sessionFactory) {
        this.sessionFactory=sessionFactory;
    }
    
    //使用SessionFactory對象返回Session對象
    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;
    }

}

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5.業務邏輯層

（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();
}

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（2）實現類MemberServiceImpl.java(設值注入DAO層組件)

package com.service;

import java.util.List;

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

public class MemberServiceImpl implements MemberService {
    private MemberDAO memberDao;
    //設值注入DAO對象
    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();
    }

}

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6. Action類

（1）注冊MemberRegisterAction.java（設值注入業務邏輯組件）

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;
    }
    //注入業務邏輯組件
    public void setMemberService(MemberService memberService) {
        this.memberService = memberService;
    }
    public String execute(){
        memberService.add(member);
        return SUCCESS;
    }
    
}

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（2）刪除MemberDeleteAction.java(設置注入業務邏輯組件，注意傳入參數id的相應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;
    }
}

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（3）查詢MemberQueryAction.java(用於查看所有會員信息)

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;
    }
}

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（4）修改MemberUpdateAction.java(有兩個方法，execute（）和showMember（），當需要修改時，showMember（）方法轉向update.jsp.並設置好需要修改的對象，修改完成之后，由spring托管的memberUpdateAction組件執行execute方法進行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;
    }
}

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（5）登錄MemberLoginAction.java（將輸入的信息與數據庫中進行比較）

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;
    }
    //注入業務邏輯組件
    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;
    }
}

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7.struts.xml

　　spring托管將Struts2中的Action的實例化工作交由Spring容器統一管理，同時使Struts2中的Action實例能夠訪問Spring提供的業務邏輯資源，spring容器依賴注入的優勢也可以體現，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來負責進行實例化.

<?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屬性值是spring定義的Bean，當執行execute（）返回success時，控制轉到另一個動作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>

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8.applicationContext.xml

　　spring 框架提供了多種數據源類，可以使用spring提供的DriverManagerDataSource類還可以使用第三方數據源，如C3P0的ComboPooledDataSource數據源類，注意相應的兩個jar包c3p0-0.9.2.1.jar mchange-commons-java-0.2.3.4.jar.

　　Hibernate4已經完全實現自己的事物管理，所以spring4不提供HibernateDaoSupport和HibernateTemplete的支持。可以在應用程序的spring上下文中，像配置其他bean那樣來配置HibernateSession工廠。如果要使用XML文件定義對象與數據庫之間的映射，則需要在spring中配置LocalSessionFactoryBean。hibernateProperties屬性配置了Hibernate如何進行操作的細節。"hibernate.current_session_context_class"是為當前Session提供一個策略，Session由org.springframework.orm.hibernate4.SpringSessionContext.currentSession得到。將sessionFactory注入到其他Bean中，如注入到DAO組件中，使其獲得SessionFactory的引用后，就可以實現對數據庫的訪問。

<?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">
    <!-- 構造方法注入會話工廠組件sessionFactory -->
        <constructor-arg>
            <ref bean="sessionFactory"/>
        </constructor-arg>
    </bean>
    
    
    <bean id="memberService" class="com.service.MemberServiceImpl">
    <!-- 設值注入DAO組件 -->
        <property name="memberDao" ref="memberDao"></property>
    </bean>
    
    
    <bean id="memberRegisterAction" class="com.action.MemberRegisterAction">
    <!-- 設值注入業務邏輯組件 -->
        <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>

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9.jsp

（1）注冊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>會員注冊頁面</title>
</head>
<body>
    <s:form action="memberRegister" method="post">
        <h4><s:text name="歡迎注冊會員"></s:text></h4>
        <s:property value="exception.message"/>
        <s:textfield name="member.name" label="會員姓名" tooltip="Enter your name!" required="true"></s:textfield>
        <s:password name="member.password" label="會員口令" tooltip="Enter your password!"></s:password>
        <s:textfield name="member.address" label="會員地址"></s:textfield>
        <s:textfield name="member.email" label="會員郵箱"></s:textfield>
        <s:textfield name="member.level" label="會員級別"></s:textfield>
        <s:submit value="提交"/>
    </s:form>
</body>
</html>

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（2）所有會員信息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>顯示會員信息</title>
</head>
<body>
    <h4>會員信息</h4>
    <table border='1'>
        <tr>
            <td>會員id</td><td>會員名</td><td>密碼</td><td>地址</td><td>郵箱</td><td>級別</td><td>刪除</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>">刪除</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">返回注冊頁面</a>
</body>
</html>

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（3）修改頁面update.jsp

　　注意：不允許修改會員id，當需要將會員id傳遞給更新會員動作，所以使用隱藏表單域標簽來接收顯示會員頁面傳遞來的會員id在update.jsp頁面提交時再傳遞給更新會員的動作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>修改會員信息</title>
</head>
<body>
    <s:form action="memberUpdate" method="post">
        <h4><s:text name="修改會員信息"></s:text></h4>
        <s:actionerror/>
        
        <s:hidden name="member.id" value="%{member.id}"></s:hidden>
        <s:textfield name="member.name" label="會員姓名" required="true"></s:textfield>
        <s:textfield name="member.password" label="會員口令"></s:textfield>
        <s:textfield name="member.address" label="會員地址"></s:textfield>
        <s:textfield name="member.email" label="會員郵箱"></s:textfield>
        <s:textfield name="member.level" label="會員級別"></s:textfield>
        <s:submit value="提交"/>
    </s:form>
</body>
</html>

View Code

（4）登錄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>會員登錄</title>
</head>
<body>
    <s:form action="memberLogin" method="post">
        <s:textfield name="member.name" label="會員姓名"></s:textfield>
        <s:password name="member.password" label="會員口令"></s:password>
        <s:submit value="提交"></s:submit>
    </s:form>
</body>
</html>

View Code

（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>貴賓你好！</title>
</head>
<body>
    合法成員
</body>
</html>

View Code

10. END

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

　　本篇案例算是最簡單的ssh整合，注入形式也都一目了然，如果對你有幫助，請點贊或關注我，謝謝觀看！

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