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 block110             e.printStackTrace();111         } catch (SAXException e) {112             // TODO Auto-generated catch block113             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     @Override124     public void startElement(String uri, String localName, String qName,125             Attributes attributes) throws SAXException {126         127         currentTag = qName;128     }129     @Override130     public void endElement(String uri, String localName, String qName)131             throws SAXException {132         currentTag = null;133     }134     @Override135     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 }