项目搭建工具:eclipse
项目开发环境:①Windows10-64位 ②Tomcat 8.5 ③jdk1.8.0_91 ④MySql 8.0.11
jar包准备:这里不详说,自己准备不不冲突能跑起来就没啥问题。
(1)新建一个Dynamic Web Project,可命名为SSH_Template,直接点击finish按钮
(2)将选择的jar包导入到lib(/WebContent/WEB-INF/lib)中,其中包括hibernate、mysql-connector-java、spring、struts2
(3)将导入的jar包添加到项目Libraries中,项目右键==》Properties==》Java Build Path==》Libraries==》选中导入的所有jar包添加到进Libraries中
(4)在/WebContent/WEB-INF/下新建一个web.xml,配置过滤器和监听器
web.xml
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"> ssh index.action struts2 class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter class>struts2 /* contextConfigLocation classpath:applicationContext.xml org.springframework.web.context.ContextLoaderListener
开始搭建
(1)创建用于分层的四个基础包,并分别添加BookCard的操作类
(2)根据数据库表的字段编写BookCard(实体类)和BookCard.hbm.xml(映射文件)放到ssh.entity包里
package ssh.entity; import java.math.BigDecimal; import java.sql.Date; public class BookCard { private int cid; private String name; private String sex; private Date cardDate; private BigDecimal deposit; //押金 //get set方法 public int getCid() { return cid; } public void setCid(int cid) { this.cid = cid; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public Date getCardDate() { return cardDate; } public void setCardDate(Date cardDate) { this.cardDate = cardDate; } public BigDecimal getDeposit() { return deposit; } public void setDeposit(BigDecimal deposit) { this.deposit = deposit; } }
BookCard.hbm.xml
mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><class name="ssh.entity.BookCard" table="BookCard"> class="native"> class>
(3)在ssh.dao包里编写BookCardDao(接口类)和BookCardDaoImpl(实现类)。
BookCardDao.java
package ssh.dao; import java.util.List; import ssh.entity.BookCard; public interface BookCardDao { public ListgetAllBookCard(); }
BookCardDaoImpl.java
package ssh.dao; import java.util.List; import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; import ssh.entity.BookCard; public class BookCardDaoImpl implements BookCardDao { //在SSH的设计理念:要使用某个实例,那么就定义声明一个对象,然后 //给它添加set方法(用于spring注入进来) //实现不要关注这个实例来自于那里,以及怎么创建,或者它是谁 private SessionFactory sessionFactory; public void setSessionFactory(SessionFactory sessionFactory) { this.sessionFactory = sessionFactory; } @Override public ListgetAllBookCard() { //sessionFactory这个实例可以自己按常规的hibernate传统写法创建 //也可以交给spring去托管 Configuration cfg = new Configuration().configure(); sessionFactory = cfg.buildSessionFactory(); //获取session Session session = sessionFactory.openSession(); //后面当使用JPA的时候,EntityManager 类似于 Session Query query = session.createQuery("from BookCard"); //将所有的数据查询出来并放到List集合里 List list = query.list(); //将集合遍历循环 for(BookCard bookCard:list){ //打印输出到控制台 System.out.println(bookCard); } //关闭session session.close(); //关闭sessionFactory sessionFactory.close(); //返回list集合 return list; } }
(4)在ssh.service包里编写BookCardService(接口类)和BookCardServiceImpl(实现类)。
BookCardService.javapackage ssh.service; import java.util.List; import ssh.entity.BookCard; public interface BookCardService { public ListgetAllBookCard(); }
BookCardServiceImpl.java
package ssh.service; import java.util.List; import ssh.dao.BookCardDao; import ssh.entity.BookCard; public class BookCardServiceImpl implements BookCardService{ //dao实例使用注入方式 private BookCardDao id; //用于注入使用 public void setId(BookCardDao id) { this.id = id; } @Override public ListgetAllBookCard() { //本类应该编写业务逻辑的代码, //但本例没有业务逻辑,就不用写。 //访问数据库的代码,不会出现在service这一层 //交给dao来操作数据库 List myBookCardList = id.getAllBookCard(); //进行其它的业务逻辑操作,比如增加多一个选项,是否过期 //本例不需要 //.... return myBookCardList; } }
(5)在ssh.action包里编写IndexAction(action类)。
IndexAction.java
package ssh.action; import java.text.DecimalFormat; import java.util.List; import ssh.entity.BookCard; import ssh.service.BookCardService; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; //创建IndexAction(action类)继承ActionSupport接口 public class IndexAction extends ActionSupport { private static final long serialVersionUID = 1L; //声明service,但不给它创建具体的实现类的实例, private BookCardService is = null; //添加set()方法 public void setIs(BookCardService is) { this.is = is; } //编写execute()方法 public String execute() { //获取IndexService实例,调用getAllBookCard()方法 //将结果保存到List集合里 ListmyBookCardList = is.getAllBookCard(); //将查询出来的结构集打印到控制台 System.out.println("结果集:"+myBookCardList.size()); //获取Context上下文对象 ActionContext ac = ActionContext.getContext(); //将myBookCardList集合添加到上下文对象里 ac.put("myBookCardList", myBookCardList); //返回一个字符串 return "success"; } //金额格式转换 public String formatDouble(double s){ DecimalFormat fmat=new DecimalFormat("\u00A4##.0"); return fmat.format(s); } }
(6)在/src/目录下新建配置文件struts.xml、applicationContext.xml、hibernate.cfg.xml
struts.xmlDOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN" "http://struts.apache.org/dtds/struts-2.5.dtd"><package name="default" namespace="/" extends="struts-default"> class="myIndexAction"> package>/jsp/index.jsp
applicationContext.xml
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation=" http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd 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/jee http://www.springframework.org/schema/jee/spring-jee.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> class="ssh.dao.BookCardDaoImpl" scope="prototype"> class="ssh.service.BookCardServiceImpl" scope="prototype"> class="ssh.action.IndexAction" scope="prototype">
hibernate.cfg.xml
configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">com.mysql.jdbc.Driver jdbc:mysql://localhost:3306/book root root thread true true update org.hibernate.dialect.MySQLDialect
(6)最后还有一个页面文件,页面文件根据习惯放哪里都行。
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ taglib uri="/struts-tags" prefix="s" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>My JSP 'index.jsp' starting page
卡号 | 姓名 | 性别 | 办卡日期 | 押金 | ||
没有查询到数据 |
大功告成效果图
此案例根据简书上(地址如下)修改而成非常感谢。
链接:https://www.jianshu.com/p/69030f8f5437
最后编辑时间:2018.12.20 21:04:10
作者:周老一员
至于为什么修改,原因是按照他的我没跑出来。错误如下:
替换jar以及修改部分东西运行成功。现在看来应该是jar问题。