Java微信公众平台开发（2） 微信服务器post消息体的接收

package com.cuiyongzhi.wechat.util;
import java.io.InputStream;
import java.io.Writer;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
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;
  
/**
 * ClassName: MessageUtil
 * @Description: 消息工具类
 * @author dapengniao
 * @date 2016年3月7日 上午10:05:04
 */
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"; 
  
  /**
   * @Description: 解析微信发来的请求（XML） 
   * @param @param request
   * @param @return
   * @param @throws Exception  
   * @author dapengniao
   * @date 2016年3月7日 上午10:04:02
   */
  @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; 
  } 
  
  @SuppressWarnings("unused")
  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("rawtypes")
        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); 
          } 
        } 
      }; 
    } 
  }); 
}

<!-- xml -->
<dependency>
  <groupId>org.apache.directory.studio</groupId>
  <artifactId>org.dom4j.dom4j</artifactId>
  <version>1.6.1</version>
</dependency>
 
<dependency>
  <groupId>com.thoughtworks.xstream</groupId>
  <artifactId>xstream</artifactId>
  <version>1.4.8</version>
</dependency>

@RequestMapping(value = "security", method = RequestMethod.POST)
  // post方法用于接收微信服务端消息
  public void DoPost(HttpServletRequest request,HttpServletResponse response) {
    System.out.println("这是post方法！");
    try{
    Map<String, String> map=MessageUtil.parseXml(request);
    System.out.println("============================="+map.get("Content"));
    }catch(Exception e){
      logger.error(e,e);
    }
  }