1 项目搭建以及环境配置
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。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id private 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 */ @Override public 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()); } @Override public void delete(Long id) { super.getJdbcTemplate().update("DELETE FROM t_news WHERE id",id); } @Override public 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() ); } @Override public News query(Long id) { return super.getJdbcTemplate().queryForObject("select * from t_news where id=?", new NewsRowMapper()) ; } @Override public 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>{ @Override public 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; } @Override public void save(News news) { newsDAO.save(news); } @Override public void delete(Long id) { newsDAO.delete(id); } @Override public void update(News news) { newsDAO.update(news); } @Override public News findNewsById(Long id) { return newsDAO.query(id); } @Override public 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 { @Autowired private NewsService newsService; @Test public 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); } @Test public void testQuery(){ News newsById = newsService.findNewsById(16L); System.out.println(newsById); } @Test public void delete(){ newsService.delete(10L); } @Test public void updateTest(){ News news = newsService.findNewsById(16L); news.setTitle("寺库的危机"); newsService.update(news); } @Test public 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