一个SAX RSS解析器的核心部分

message对象,用来存储每个rss中的一条新闻

1: package com.leipei.rss;

   2:  

   3: import java.net.MalformedURLException;

   4: import java.net.URL;

   5: import java.text.ParseException;

   6: import java.text.SimpleDateFormat;

   7: import java.util.Date;

   8:  

   9: /*

  10:  * 每条rss消息的结构体

  11:  */

  12: public class Message implements Comparable<Message> {

  13:     static SimpleDateFormat FORMATTER = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

  14:     /*

  15:      * 每条rss消息都至少包含tile,link,description,pubdate字段

  16:      */

  17:     private String title=null;

  18:     private URL link=null;

  19:     private String description=null;

  20:     private Date pubDate=null;

  21:     

  22:     public String getTitle() {

  23:         return title;

  24:     }

  25:  

  26:     public void setTitle(String title) {

  27:         this.title = title;

  28:     }

  29:  

  30:     // getters and setters omitted for brevity

  31:     public URL getLink() {

  32:         return link;

  33:     }

  34:  

  35:     public void setLink(String link) {

  36:         try {

  37:             this.link = new URL(link);

  38:         } catch (MalformedURLException e) {

  39:             throw new RuntimeException(e);

  40:         }

  41:     }

  42:  

  43:     public String getDescription() {

  44:         return description;

  45:     }

  46: /*

  47:  * 里面加append部分是为了解决类似网易新闻中description tag解析两次的问题

  48:  */

  49:     public void setDescription(String description) {

  50:         if( this.description==null){

  51:             this.description=description;

  52:             }else{

  53:                 this.description=this.description+description;

  54:             }

  55:     }

  56:  

  57:     public String getDate() {

  58:         return FORMATTER.format(this.pubDate);

  59:     }

  60:  

  61:     public void setDate(String date) {

  62:         try {

  63:             if (date == null || date.equals("")) {

  64:                 this.pubDate = null;

  65:             } else {

  66:                 this.pubDate = FORMATTER.parse(date);

  67:             }

  68:         } catch (ParseException e) {

  69:             e.printStackTrace();

  70:         }

  71:         System.out.println("date string is:\t" + date);

  72:     }

  73:  

  74:     @Override

  75:     public String toString() {

  76:         StringBuilder sb = new StringBuilder();

  77:         sb.append("Title: ");

  78:         sb.append(title);

  79:         sb.append('\n');

  80:         sb.append("Date: ");

  81:         sb.append(this.getDate());

  82:         sb.append('\n');

  83:         sb.append("Link: ");

  84:         sb.append(link);

  85:         sb.append('\n');

  86:         sb.append("Description: ");

  87:         sb.append(description);

  88:         return sb.toString();

  89:     }

  90:  

  91:     @Override

  92:     public int hashCode() {

  93:         final int prime = 31;

  94:         int result = 1;

  95:         result = prime * result + ((this.pubDate == null) ? 0 : this.pubDate.hashCode());

  96:         result = prime * result

  97:                 + ((description == null) ? 0 : description.hashCode());

  98:         result = prime * result + ((link == null) ? 0 : link.hashCode());

  99:         result = prime * result + ((title == null) ? 0 : title.hashCode());

 100:         return result;

 101:     }

 102:  

 103:     @Override

 104:     public boolean equals(Object obj) {

 105:         if (this == obj)

 106:             return true;

 107:         if (obj == null)

 108:             return false;

 109:         if (getClass() != obj.getClass())

 110:             return false;

 111:         Message other = (Message) obj;

 112:         if (this.pubDate == null) {

 113:             if (other.pubDate != null)

 114:                 return false;

 115:         } else if (!this.pubDate.equals(other.pubDate))

 116:             return false;

 117:         if (description == null) {

 118:             if (other.description != null)

 119:                 return false;

 120:         } else if (!description.equals(other.description))

 121:             return false;

 122:         if (link == null) {

 123:             if (other.link != null)

 124:                 return false;

 125:         } else if (!link.equals(other.link))

 126:             return false;

 127:         if (title == null) {

 128:             if (other.title != null)

 129:                 return false;

 130:         } else if (!title.equals(other.title))

 131:             return false;

 132:         return true;

 133:     }

 134:  

 135:     public int compareTo(Message another) {

 136:         if (another == null)

 137:             return 1;

 138:         return another.pubDate.compareTo(this.pubDate);

 139:     }

 140: }