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 }
