Java写一个新闻类 

  
  1 package com.jredu.ch10;
  2 
  3 import java.util.Scanner;
  4 
  5 /**
  6  * 新闻类
  7  * @author Administrator
  8  *
  9  */
 10 public class News {
 11 
 12     private int id;//编号
 13     private String title;//标题
 14     private String content;//内容
 15     private String addUser;//添加人
 16     private String imgPath;//图片
 17     private String pubDate;//发布时间
 18     private boolean isShow;//是否显示
 19     
 20     /**
 21      * 无参构造
 22      */
 23     public News(Scanner sc) {
 24         super();
 25         System.out.print("请输入新闻编号");
 26         this.id=sc.nextInt();
 27         // TODO Auto-generated constructor stub
 28         init(sc);
 29     }
 30     
 31     /**
 32      * 带编号的有参构造
 33      * @param id
 34      */
 35     public News(Scanner sc,int id) {
 36         super();
 37         // TODO Auto-generated constructor stub
 38         this.id=id;
 39         // TODO Auto-generated constructor stub
 40         init(sc);
 41     }
 42 
 43     public News(int id, String title, String content, String addUser, String imgPath, String pubDate, boolean isShow) {
 44         super();
 45         this.id = id;
 46         this.title = title;
 47         this.content = content;
 48         this.addUser = addUser;
 49         this.imgPath = imgPath;
 50         this.pubDate = pubDate;
 51         this.isShow = isShow;
 52     }
 53     
 54     public void init(Scanner sc) {
 55         System.out.print("请输入标题");
 56         this.title=sc.next();
 57         System.out.print("请输入内容");
 58         this.content=sc.next();
 59         System.out.print("请输入发布者");
 60         this.addUser=sc.next();
 61         System.out.print("请输入发布时间");
 62         this.pubDate=sc.next();
 63         System.out.print("请输入图片路径");
 64         this.imgPath=sc.next();
 65         System.out.print("是否显示(y/n)");
 66         this.isShow=sc.next().equals("y")?true:false;
 67     }
 68 
 69     public int getId() {
 70         return id;
 71     }
 72 
 73     public void setId(int id) {
 74         this.id = id;
 75     }
 76 
 77     public String getTitle() {
 78         return title;
 79     }
 80 
 81     public void setTitle(String title) {
 82         this.title = title;
 83     }
 84 
 85     public String getContent() {
 86         return content;
 87     }
 88 
 89     public void setContent(String content) {
 90         this.content = content;
 91     }
 92 
 93     public String getAddUser() {
 94         return addUser;
 95     }
 96 
 97     public void setAddUser(String addUser) {
 98         this.addUser = addUser;
 99     }
100 
101     public String getImgPath() {
102         return imgPath;
103     }
104 
105     public void setImgPath(String imgPath) {
106         this.imgPath = imgPath;
107     }
108 
109     public String getPubDate() {
110         return pubDate;
111     }
112 
113     public void setPubDate(String pubDate) {
114         this.pubDate = pubDate;
115     }
116 
117     public boolean isShow() {
118         return isShow;
119     }
120 
121     public void setShow(boolean isShow) {
122         this.isShow = isShow;
123     }
124     
125 }
package com.jredu.ch10;
/**
 * 新闻业务类
 * @author Administrator
 *
 */
public class NewsService {
    //所有的新闻
    private News[] news1=new News[100];
    private int index;//新闻的下标
    /**
     * 添加新闻
     * @param news
     * @return 添加新闻成功时，返回true,添加失败时返回false
     */
    public boolean addNews(News news) {
        if(index<news1.length) {
            for(int i=0;i<index;i++) {
                if(news1[i].getId()==news.getId()) {
                    System.out.println("该新闻编号已经存在，无法添加");
                    return false;
                }
            }
            news1[index]=news;
            index++;
            return true;
        }
        return false;
    }
    
    /**
     * 删除新闻
     * @param id
     * @return 当新闻删除成功时，返回true,删除失败时，返回false
     */
    public boolean deleteNews(int id) {
        //循环遍历所有的新闻
        for(int i=0;i<index;i++) {
            //遍历每一条新闻不为空,并且id等于传入的id时
            if(news1[i]!=null&&news1[i].getId()==id) {
                //删除这条新闻
                news1[i]=null;
                return true;
            }
        }
        return false;
    }
    
    /**
     * 更新新闻
     * @param news
     */
    public boolean updateNews(News news) {
        //循环遍历所有的新闻
        for(int i=0;i<index;i++) {
            //遍历每一条新闻不为空,并且id等于传入的id时
            if(news1[i]!=null&&news1[i].getId()==news.getId()) {
                //更新这条新闻
                news1[i]=news;
                return true;
            }
        }
        return false;
    }
    
    /**
     * 显示新闻
     */
    public void showNews() {
        News news=null;
        for(int i=0;i<index;i++) {
            if(news1[i]!=null&&news1[i].isShow()) {
                news=news1[i];
                System.out.println("编号："+news.getId()+"\t标题:"+news.getTitle());
                System.out.println("作者:"+news.getAddUser()+"\t发布时间："+news.getPubDate());
                System.out.println("\t"+news.getContent());
                System.out.println("图片地址："+news.getImgPath());
            }
        }
    }
    
}
 1 package com.jredu.ch10;
 2 
 3 import java.util.Scanner;
 4 
 5 public class NewsTest {
 6 
 7     public static void main(String[] args) {
 8         NewsService service=new NewsService();
 9         Scanner sc=new Scanner(System.in);
10         //进入系统，让用户选择功能
11         System.out.println("*********欢迎进入新闻管理系统*********");
12         while(true) {
13             System.out.println("1.添加新闻\t2.删除新闻\t3.更新新闻\t4.查看新闻\tn.退出系统");
14             System.out.println("请选择功能");
15             String code=sc.next();
16             boolean isReturn=false;
17             switch(code) {
18                 //添加新闻
19                 case "1":
20                     News news=new News(sc);
21                     boolean isAdd=service.addNews(news);
22                     if(!isAdd) {
23                         System.out.println("添加新闻失败");
24                     }
25                     break;
26                 //删除新闻
27                 case "2":
28                     System.out.print("请输入编号");
29                     boolean isDelete=service.deleteNews(sc.nextInt());
30                     if(!isDelete) {
31                         System.out.println("删除新闻失败");
32                     }
33                     break;
34                 //更新新闻
35                 case "3":
36                     System.out.print("请输入编号");
37                     News news1=new News(sc,sc.nextInt());
38                     boolean isUpdate=service.updateNews(news1);
39                     if(!isUpdate) {
40                         System.out.println("更新新闻失败");
41                     }
42                     break;
43                 //查看新闻
44                 case "4":
45                     service.showNews();
46                     break;
47                 //退出系统
48                 default:
49                     isReturn=true;
50                     break;
51             }
52             if(isReturn) {
53                 break;
54             }
55         }
56         System.out.println("谢谢使用，再见");
57         sc.close();
58     }
59     
60 }

 

posted @ 2017-03-29 12:23  天冷吃冰棍儿  阅读(1129)  评论(0)    收藏  举报