news_flash新闻快讯项目 Chapter 1

1 项目搭建以及环境配置

<font size=4>本项目是一个简单的新闻资讯的发布管理系统，新闻工作人员可以添加新闻，删除，修改新闻。也可以编辑发布新闻。</font>

1.1 新建news_flash项目（web项目结构）maven配置，下图是项目的整体结构。

1.2 领域对象的建立domain

package cn.czg.core.dao;import java.io.Serializable;
import java.util.Date;/*** 新闻领域对象*/
public class News implements Serializable{//新闻idprivate Long id;//新闻题目private String title;//新闻内容private String context;//新闻图片路径private String imgUrl;//新闻录入时间private Date inputDate;//浏览次数(热点新闻)private Integer viewCount;//是否推荐新闻private Boolean isRecommend;//新闻类型private NewsType type;//新闻录入人(自动生成)private User user;public Long getId() {return id;}public void setId(Long id) {this.id = id;}public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public String getContext() {return context;}public void setContext(String context) {this.context = context;}public String getImgUrl() {return imgUrl;}public void setImgUrl(String imgUrl) {this.imgUrl = imgUrl;}public Date getInputDate() {return inputDate;}public void setInputDate(Date inputDate) {this.inputDate = inputDate;}public Integer getViewCount() {return viewCount;}public void setViewCount(Integer viewCount) {this.viewCount = viewCount;}public Boolean getRecommend() {return isRecommend;}public void setRecommend(Boolean recommend) {isRecommend = recommend;}public NewsType getType() {return type;}public void setType(NewsType type) {this.type = type;}public User getUser() {return user;}public void setUser(User user) {this.user = user;}
}

上述的是News对象，下面以此建立NewsType、以及User对象

package cn.czg.core.dao;import java.io.Serializable;/*** 新闻类型领域对象*/
public class NewsType implements Serializable{/** 新闻类型id*/private Long id;/** 新闻类型名称*/private String name;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;}
}

package cn.czg.core.dao;import java.io.Serializable;/*** 用户领域对象*/
public class User implements Serializable {/** 用户id*/private Long id;/** 用户名称*/private String name;/** 用户密码*/private String password;/** 0：代表管理员(管理后台)  1：普通用户(可以留言)*/private Integer type;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 Integer getType() {return type;}public void setType(Integer type) {this.type = type;}
}

1.3 根据domain建立数据库mysql

第一张表：t_news,建表语句如下：

CREATE TABLE t_news (
id bigint(20) NOT NULL AUTO_INCREMENT,
title varchar(50) DEFAULT NULL,
context longtext,
imgUrl varchar(255) DEFAULT NULL,
viewCount int(11) DEFAULT NULL,
isRecommend bit(1) DEFAULT NULL,
inputDate datetime DEFAULT NULL,
type_id bigint(20) DEFAULT NULL,
user_id bigint(20) DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

第二张表：t_newsType,建表语句如下：

CREATE TABLE t_newstype (
id bigint(20) NOT NULL AUTO_INCREMENT,
name varchar(50) DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

第三张表：t_user,建表语句如下：

CREATE TABLE t_user (
id bigint(20) NOT NULL AUTO_INCREMENT,
name varchar(255) DEFAULT NULL,
password varchar(255) DEFAULT NULL,
type int(11) DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

1.4 配置数据源，装配bean,根据bean创建dao层

jdbc.properties文件：

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///news_flash
jdbc.username=root
jdbc.password=gosaint

applicationContext.xml文件：

<?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.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"><!-- druid数据库连接池 --><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close"><property name="driverClassName" value="${jdbc.driverClassName}"/><property name="url" value="${jdbc.url}"/><property name="username" value="${jdbc.username}"/><property name="password" value="${jdbc.password}"/></bean><context:property-placeholder location="classpath:jdbc.properties"/><bean id="newsDAO" class="cn.czg.core.dao.impl.NewsDAOImpl"><property name="dataSource" ref="dataSource"></property></bean>
</beans>

创建dao以及dao的实现类，这里使用JdbcDaoSupport

package cn.czg.core.dao;import cn.czg.core.domain.News;import java.util.List;/*** 新闻咨询的CRUD接口*/
public interface NewsDAO {void save(News news);void delete(Long id);void update(News news);News query(Long id);List<News> list();
}

package cn.czg.core.dao.impl;import cn.czg.core.dao.NewsDAO;
import cn.czg.core.domain.News;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.support.JdbcDaoSupport;import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;/*** 继承JdbcDaoSupport，里面有数据源对象*/
public class NewsDAOImpl extends JdbcDaoSupport implements NewsDAO{/*** 保存一个news对象* @param news*/@Overridepublic void save(News news) {super.getJdbcTemplate().update("insert into t_news(title,context,imgUrl,viewCount,isRecommend,inputDate) values (?,?,?,?,?,?)",news.getTitle(),news.getContext(),news.getImgUrl(),news.getViewCount(),news.getIsRecommend(),news.getInputDate());}@Overridepublic void delete(Long id) {super.getJdbcTemplate().update("DELETE FROM t_news WHERE id",id);}@Overridepublic void update(News news) {super.getJdbcTemplate().update("update t_news set title=?,context=?,imgUrl=?,viewCount=?,isRecommend=?,inputDate=? where id=?",news.getTitle(),news.getContext(),news.getImgUrl(),news.getViewCount(),news.getIsRecommend(),news.getInputDate(),news.getId());}@Overridepublic News query(Long id) {return super.getJdbcTemplate().queryForObject("select * from t_news where id=?", new NewsRowMapper()) ;}@Overridepublic List<News> list() {return super.getJdbcTemplate().query("select * from t_news",new NewsRowMapper());}/*** 使用静态内部类封装了结果集对象*/public static class NewsRowMapper implements RowMapper<News>{@Overridepublic News mapRow(ResultSet resultSet, int i) throws SQLException {News news = new News();news.setId(resultSet.getLong("id"));news.setTitle(resultSet.getString("title"));news.setContext(resultSet.getString("context"));news.setImgUrl(resultSet.getString("imgUrl"));news.setViewCount(resultSet.getInt("viewCount"));news.setIsRecommend(resultSet.getBoolean("isRecommend"));news.setInputDate(resultSet.getDate("inputDate"));return news;}}
}

1.5 service层

package cn.czg.core.service.impl;import cn.czg.core.dao.NewsDAO;
import cn.czg.core.domain.News;
import cn.czg.core.service.NewsService;import java.util.List;public class NewsServiceImpl implements NewsService{/*** 注入dao* @param news*/private NewsDAO newsDAO;public void setNewsDAO(NewsDAO newsDAO) {this.newsDAO = newsDAO;}@Overridepublic void save(News news) {newsDAO.save(news);}@Overridepublic void delete(Long id) {newsDAO.delete(id);}@Overridepublic void update(News news) {newsDAO.update(news);}@Overridepublic News findNewsById(Long id) {return newsDAO.query(id);}@Overridepublic List<News> list() {return newsDAO.list();}
}

1.6 单元测试

1 抽取BaseTest类（Spring测试的注解配置）
2 CRUD的测试

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class BaseTest {}

public class NewsTest extends BaseTest {@Autowiredprivate NewsService newsService;@Testpublic void saveTest(){News news=new News();news.setTitle("刘强东：敢在京东卖假货，就敢让你破产");news.setViewCount(77);news.setIsRecommend(true);news.setInputDate(new Date());news.setImgUrl("E:\\就业资料\\14_aigou\\2017-07-31-B2C商城(爱购网)-DAY01\\code\\news_flash\\img\\f3624688c24ee77_w495_h277.jpg");news.setContext("刘强东：做供给链处事。互联网有两个情势，一个是轻情势，一个是重情势，轻情势就是做平台，然则多么没有价值，我们要做有价值的任务，所以，供给链路子是对的，我们是独一的一家重运营重资产的情势。");newsService.save(news);}@Testpublic void testQuery(){News newsById = newsService.findNewsById(16L);System.out.println(newsById);}@Testpublic void delete(){newsService.delete(10L);}@Testpublic void updateTest(){News news = newsService.findNewsById(16L);news.setTitle("寺库的危机");newsService.update(news);}@Testpublic void testList(){List<News> list = newsService.list();System.out.println(list);}
}

1.7 web.xml的配置

<!DOCTYPE web-app PUBLIC"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN""http://java.sun.com/dtd/web-app_2_3.dtd" ><web-app><display-name>Archetype Created Web Application</display-name><!--上下文的配置--><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value></context-param><!--struts2的核心过滤器的配置--><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监听的配置--><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>
</web-app>

.启动tomcat,运行即可，发现程序正式启动，第二章会为大家带来相关的页面，以及分页和高级查询，以及图片上传等相关的技术。敬请期待。相关的代码我会在最后一章的时候发布到我的Github地址上，感兴趣的可以下载下来直接使用，当然相应的sql文件包括在内

代码请见最后一章,有Github地址