微信消息处理JAXP-sax解析

  1 package cn.zhaokai.sax;
  2 
  3 import java.io.IOException;
  4 import java.io.InputStream;
  5 import java.io.PrintWriter;
  6 import java.text.SimpleDateFormat;
  7 import java.util.ArrayList;
  8 import java.util.List;
  9 
 10 import javax.servlet.ServletException;
 11 import javax.servlet.http.HttpServlet;
 12 import javax.servlet.http.HttpServletRequest;
 13 import javax.servlet.http.HttpServletResponse;
 14 import javax.xml.parsers.ParserConfigurationException;
 15 import javax.xml.parsers.SAXParser;
 16 import javax.xml.parsers.SAXParserFactory;
 17 
 18 import org.xml.sax.Attributes;
 19 import org.xml.sax.InputSource;
 20 import org.xml.sax.Locator;
 21 import org.xml.sax.SAXException;
 22 import org.xml.sax.XMLReader;
 23 import org.xml.sax.helpers.DefaultHandler;
 24 
 25 public class Demo1 extends HttpServlet {
 26 
 27     public void doPost(HttpServletRequest request, HttpServletResponse response)
 28             throws ServletException, IOException {
 29 
 30     try {
 31             //解决乱码问题
 32             request.setCharacterEncoding("UTF-8");
 33             response.setContentType("text/html;charset=UTF-8"); 
 34             //得到输入流
 35             InputStream inputStream = request.getInputStream();
 36             //A single input source for an XML entity
 37             InputSource input = new InputSource(inputStream);
 38             
 39            //5步 sax解析
 40             //1创建工厂
 41             SAXParserFactory factory = SAXParserFactory.newInstance();
 42            //得到解析器
 43             SAXParser sp= factory.newSAXParser();     
 44            //3.得到读取器
 45             XMLReader reader = sp.getXMLReader();        
 46             //4.设置内容处理器，TagValueHandler是单独写的函数
 47            TagValueHandler handler= new TagValueHandler();
 48            reader.setContentHandler(handler); 
 49            //5.读取xml文档内容
 50            reader.parse(input); 
 51            //返回识别结果
 52            List list = handler.getList();
 53            
 54            //定义输出对象，输出到response
 55            PrintWriter out = response.getWriter();
 56            
 57            //输出原始消息
 58            String content1 = "<xml><ToUserName><![CDATA[gh_1c586f95bd68]]></ToUserName><FromUserName><![CDATA[ogNtkuMTj4uOx-DCvLfu8mUDmubM]]></FromUserName><CreateTime>1403313142</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[软件孵化实验室]]></Content><MsgId>6027184051137754303</MsgId></xml>";
 59            String content2 = "<xml><ToUserName><![CDATA[gh_1c586f95bd68]]></ToUserName><FromUserName><![CDATA[ogNtkuMTj4uOx-DCvLfu8mUDmubM]]></FromUserName><CreateTime>1403313091</CreateTime><MsgType><![CDATA[event]]></MsgType><Event><![CDATA[CLICK]]></Event><EventKey><![CDATA[I_SDUT_SIL]]></EventKey></xml>";
 60            out.println("原始消息:");
 61            if(list.get(3).equals("text"))
 62            {
 63                out.println(content1);
 64                 out.println("解析结果:");
 65                 out.print("FromUserName(来自)：");
 66                 out.println(list.get(1));
 67                 out.print("ToUserName(发送至)：");
 68                 out.println(list.get(0));
 69                 out.print("CreateTime(时间)：");
 70                  
 71                 //时间转换
 72                 int t = Integer.parseInt((String) list.get(2));
 73                 SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd hh:mm:ss");
 74                 out.println(format.format((long)t*1000L));
 75 
 76                 out.print("MsgType(消息类型)：");
 77                 out.println(list.get(3));
 78                 out.print("Content(文本内容)：");
 79                 out.println(list.get(4));
 80                 out.print("MsgId(文本消息标识号)：");
 81                 out.println(list.get(5));
 82            }
 83            else
 84            {
 85                out.println(content2);
 86                 out.println("解析结果:");
 87                 out.print("FromUserName(来自)：");
 88                 out.println(list.get(1));
 89                 out.print("ToUserName(发送至)：");
 90                 out.println(list.get(0));
 91                 out.print("CreateTime(时间)：");
 92                  
 93                 //时间转换
 94                 int t = Integer.parseInt((String) list.get(2));
 95                 SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd hh:mm:ss");
 96                 out.println(format.format((long)t*1000L));
 97                 out.print("MsgType(消息类型)：");
 98                 out.println(list.get(3));
 99                 out.print("Event(事件)：");
100                 out.println(list.get(4));
101                 out.print("EventKey(事件值)：");
102                 out.println(list.get(5));
103                
104            }
105     
106            
107             
108         } catch (ParserConfigurationException e) {
109             // TODO Auto-generated catch block
110             e.printStackTrace();
111         } catch (SAXException e) {
112             // TODO Auto-generated catch block
113             e.printStackTrace();
114         }    
115     }
116 }
117 //解析xml文档
118 class TagValueHandler extends DefaultHandler{
119     
120     List <String> list = new ArrayList();
121 
122     private String currentTag;  //记住当前解析到的是什么标签
123     @Override
124     public void startElement(String uri, String localName, String qName,
125             Attributes attributes) throws SAXException {
126         
127         currentTag = qName;
128     }
129     @Override
130     public void endElement(String uri, String localName, String qName)
131             throws SAXException {
132         currentTag = null;
133     }
134     @Override
135     public void characters(char[] ch, int start, int length)
136             throws SAXException {
137         
138         if("ToUserName".equals(currentTag)){
139          list.add(new String(ch,start,length));
140         }
141         if("FromUserName".equals(currentTag)){
142             list.add(new String(ch,start,length));
143            }
144         if("CreateTime".equals(currentTag)){
145             list.add(new String(ch,start,length));
146            }
147         if("MsgType".equals(currentTag)){
148             list.add(new String(ch,start,length));
149            }
150         if("Content".equals(currentTag)){
151             list.add(new String(ch,start,length));
152            }
153         else if("Event".equals(currentTag)){
154             list.add(new String(ch,start,length));
155         }
156         if("MsgId".equals(currentTag)){
157             list.add(new String(ch,start,length));
158            }
159         else if("EventKey".equals(currentTag))
160         {
161             list.add(new String(ch,start,length));
162         }
163     } 
164    
165     public List getList() {
166         return list;
167     }
168 }