微信java开发工具类

package weixin; import java.io.InputStream; import java.io.Writer; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.regex.Matcher; import java.util.regex.Pattern; import javax.servlet.http.HttpServletRequest; import org.dom4j.Document; import org.dom4j.Element; import org.dom4j.io.SAXReader; import com.thoughtworks.xstream.XStream; import com.thoughtworks.xstream.core.util.QuickWriter; import com.thoughtworks.xstream.io.HierarchicalStreamWriter; import com.thoughtworks.xstream.io.xml.PrettyPrintWriter; import com.thoughtworks.xstream.io.xml.XppDriver; /** * 消息工具类 * * @author lvhuina * @date 2016-01-15 */ public class MessageUtil { /** * 返回消息类型：文本 */ public static final String RESP_MESSAGE_TYPE_TEXT = "text"; /** * 返回消息类型：音乐 */ public static final String RESP_MESSAGE_TYPE_MUSIC = "music"; /** * 返回消息类型：图文 */ public static final String RESP_MESSAGE_TYPE_NEWS = "news"; /** * 请求消息类型：文本 */ public static final String REQ_MESSAGE_TYPE_TEXT = "text"; /** * 请求消息类型：图片 */ public static final String REQ_MESSAGE_TYPE_IMAGE = "image"; /** * 请求消息类型：链接 */ public static final String REQ_MESSAGE_TYPE_LINK = "link"; /** * 请求消息类型：地理位置 */ public static final String REQ_MESSAGE_TYPE_LOCATION = "location"; /** * 请求消息类型：音频 */ public static final String REQ_MESSAGE_TYPE_VOICE = "voice"; /** * 请求消息类型：推送 */ public static final String REQ_MESSAGE_TYPE_EVENT = "event"; /** * 事件类型：subscribe(订阅) */ public static final String EVENT_TYPE_SUBSCRIBE = "subscribe"; /** * 事件类型：unsubscribe(取消订阅) */ public static final String EVENT_TYPE_UNSUBSCRIBE = "unsubscribe"; /** * 事件类型：CLICK(自定义菜单点击事件) */ public static final String EVENT_TYPE_CLICK = "CLICK"; /** * 解析微信发来的请求（XML） * * @param request * @return * @throws Exception */ @SuppressWarnings("unchecked") public static Map<String, String> parseXml(HttpServletRequest request) throws Exception { // 将解析结果存储在HashMap中 Map<String, String> map = new HashMap<String, String>(); // 从request中取得输入流 InputStream inputStream = request.getInputStream(); // 读取输入流 SAXReader reader = new SAXReader(); Document document = reader.read(inputStream); // 得到xml根元素 Element root = document.getRootElement(); // 得到根元素的所有子节点 List<Element> elementList = root.elements(); // 遍历所有子节点 for (Element e : elementList) map.put(e.getName(), e.getText()); // 释放资源 inputStream.close(); inputStream = null; return map; } /** * 扩展xstream，使其支持CDATA块 * * @date 2016-01-15 */ private static XStream xstream = new XStream(new XppDriver() { public HierarchicalStreamWriter createWriter(Writer out) { return new PrettyPrintWriter(out) { // 对所有xml节点的转换都增加CDATA标记 boolean cdata = true; @SuppressWarnings("unchecked") public void startNode(String name, Class clazz) { super.startNode(name, clazz); } protected void writeText(QuickWriter writer, String text) { if (cdata) { writer.write("<![CDATA["); writer.write(text); writer.write("]]>"); } else { writer.write(text); } } }; } }); /** * 从html中抽取出历史上的今天信息 * * @param html * @return */ public static String extract(String html) { StringBuffer buffer = null; // 日期标签：区分是昨天还是今天 String dateTag = getMonthDay(0); Pattern p = Pattern.compile("(.*)(<div class=\"listren\">)(.*?)(</div>)(.*)"); Matcher m = p.matcher(html); if (m.matches()) { buffer = new StringBuffer(); if (m.group(3).contains(getMonthDay(-1))) dateTag = getMonthDay(-1); // 拼装标题 buffer.append("≡≡").append(" 历史上的 ").append(dateTag).append("≡≡").append("\n\n"); // 抽取需要的数据 for (String info : m.group(3).split(" ")) { info = info.replace(dateTag, "").replace("（图）", "").replaceAll("</?[^>]+>", "").replace("&nbsp;", "").trim(); // 在每行末尾追加2个换行符 if (!"".equals(info)) { buffer.append(info).append("\n\n"); } } } // 将buffer最后两个换行符移除并返回 return (null == buffer) ? null : buffer.substring(0, buffer.lastIndexOf("\n\n")); } /** * 获取前/后n天日期(M月d日) * * @return */ public static String getMonthDay(int diff) { DateFormat df = new SimpleDateFormat("M月d日"); Calendar c = Calendar.getInstance(); c.add(Calendar.DAY_OF_YEAR, diff); return df.format(c.getTime()); } /** * 获取城市天气预报代码 * @param args */ public static String getWeather(String cityName){ return "w"; } }