概述

原文链接：http://blog.csdn.net/u011506468/article/details/47280443
公众号 SuperLishun，想要源码的可以关注公众号，给我留言。
微信服务器返回的数据都为如下格式

<xml>
<ToUserName><![CDATA[toUser]]></ToUserName>
<FromUserName><![CDATA[fromUser]]></FromUserName>
<CreateTime>12345678</CreateTime>
<MsgType><![CDATA[text]]></MsgType>
<Content><![CDATA[你好]]></Content>
</xml> 

先将其解析为java对象再处理，通过判断MsgType这个字段来判断消息的类型，进而进一步根据自己的需求进行处理。

/* type为上述MsgType */
switch (type) 
                {
                    case "text":
                        oms = wechatService.textTypeMsg(msg, wechatUser);
                        break;
                    case "image":
                        oms = wechatService.imageTypeMsg(msg, wechatUser);
                        break;
                    case "voice":
                        oms = wechatService.voiceTypeMsg(msg, wechatUser);
                        break;
                    case "video":
                        oms = wechatService.videoTypeMsg(msg, wechatUser);
                        break;
                    case "location":
                        oms = wechatService.locationTypeMsg(msg, wechatUser);
                        break;
                    case "link":
                        oms = wechatService.linkTypeMsg(msg, wechatUser);
                        break;
                    case "event":
                        oms = wechatService.eventTypeMsg(msg, wechatUser);
                        break;
                    case "news":
                        oms = wechatService.eventNewsMsg(msg, wechatUser);
                        break;
                    default:
                        break;
                }

文字处理

通过msg的content内容获得输入的字符串，通过OutMessage对象的content字段将回复内容输出，InMessage和OutMessage的数据格式会在最下面给出。WeChatUser暂时不需要，为前面封装的微信用户信息对象。处理方法代码示例如下

   /**
     * 文字内容的消息处理
     * @param msg 接收信息
     * @param wechatUser 用户信息
     * @return 回复信息
     */
    public OutMessage textTypeMsg(InMessage msg, WechatUser wechatUser)
    {
        log.info(DateUtil.format(new Date(), DateUtil.FMT_S_TIMES)+"|" + msg.getContent() +"|文字内容的消息处理");
        OutMessage out = null;
        String str = msg.getContent().toLowerCase();
        out.setContent("您输入的是：" + str);
        return out;
    } 

语音处理

将微信开发者中心的语音识别接口开启，则可以接受已经被语音识别后的语音,代码差不多，只不过是接受输入字符串的变量变了，为recognition字段

   /**
     * 语音的消息处理
     * @param msg 接收信息
     * @param wechatUser 用户信息
     * @return 回复信息
     */
    public OutMessage textTypeMsg(InMessage msg, WechatUser wechatUser)
    {
        log.info(DateUtil.format(new Date(), DateUtil.FMT_S_TIMES)+"|" + msg.getContent() +"|语音内容的消息处理");
        OutMessage out = null;
        String str = msg.getRecognition().toLowerCase();
        out.setContent("您说的是：" + str);
        return out;
    } 

其他事件

有时间在写

附录

InMessage

import java.io.Serializable;

/**
 * 接收消息实体类
 * @author lishun
 * 
 */
public class InMessage implements Serializable
{
    /**
     * 
     */
    private static final long serialVersionUID = -2572635563423558942L;

    /** 开发者微信号  */
    private String ToUserName;

    //private String Encrypt;

    /** 发送方帐号OpenID */
    private String FromUserName;

    /** 消息创建时间  */
    private Long CreateTime;

    /** text,image,location,link,event,voice,video  */
    private String MsgType = "text";

    /** 消息ID  */
    private Long MsgId;

    /** 文本消息内容  */
    private String Content;

    /** 图片链接  */
    private String PicUrl;

    /** 地理位置纬度  */
    private String Location_X;

    /** 地理位置经度  */
    private String Location_Y;

    /** 地图缩放大小  */
    private Long Scale;

    /** 地理位置信息  */
    private String Label;

    /** 消息标题  */
    private String Title;

    /** 消息描述  */
    private String Description;

    /** 消息链接  */
    private String Url;

    /** subscribe,unsubscribe,subscribe,scan,location,click */
    private String Event;

    /** 事件KEY值，与自定义菜单接口中KEY值对应  */
    private String EventKey;

    /** 二维码的ticket，可用来换取二维码图片 */
    private String Ticket;

    /** 语音消息媒体id，可以调用多媒体文件下载接口拉取该媒体  */
    private String MediaId;

    /** 语音格式：amr  */
    private String Format;

    /** 语音识别结果，UTF8编码  */
    private String Recognition;

    /** 消息id，64位整型  */
    private String MsgID;

    private String KfAccount;

    private String FromKfAccount;

    private String ToKfAccount;

    public String getFromKfAccount() {
        return FromKfAccount;
    }
    public void setFromKfAccount(String fromKfAccount) {
        FromKfAccount = fromKfAccount;
    }
    public String getToKfAccount() {
        return ToKfAccount;
    }
    public void setToKfAccount(String toKfAccount) {
        ToKfAccount = toKfAccount;
    }
    private TransInfo TransInfo;

    public String getToUserName() {
        return ToUserName;
    }
    public void setToUserName(String toUserName) {
        this.ToUserName = toUserName;
    }
    public String getFromUserName() {
        return FromUserName;
    }
    public void setFromUserName(String fromUserName) {
        this.FromUserName = fromUserName;
    }
    public Long getCreateTime() {
        return CreateTime;
    }
    public void setCreateTime(Long createTime) {
        this.CreateTime = createTime;
    }
    public String getMsgType() {
        return MsgType;
    }
    public void setMsgType(String msgType) {
        this.MsgType = msgType;
    }
    public Long getMsgId() {
        return MsgId;
    }
    public void setMsgId(Long msgId) {
        this.MsgId = msgId;
    }
    public String getContent() {
        return Content;
    }
    public void setContent(String content) {
        this.Content = content;
    }
    public String getPicUrl() {
        return PicUrl;
    }
    public void setPicUrl(String picUrl) {
        this.PicUrl = picUrl;
    }
    public String getLocation_X() {
        return Location_X;
    }
    public void setLocation_X(String location_X) {
        this.Location_X = location_X;
    }
    public String getLocation_Y() {
        return Location_Y;
    }
    public void setLocation_Y(String location_Y) {
        this.Location_Y = location_Y;
    }
    public Long getScale() {
        return Scale;
    }
    public void setScale(Long scale) {
        this.Scale = scale;
    }
    public String getLabel() {
        return Label;
    }
    public void setLabel(String label) {
        this.Label = label;
    }
    public String getTitle() {
        return Title;
    }
    public void setTitle(String title) {
        this.Title = title;
    }
    public String getDescription() {
        return Description;
    }
    public void setDescription(String description) {
        this.Description = description;
    }
    public String getUrl() {
        return Url;
    }
    public void setUrl(String url) {
        this.Url = url;
    }
    public String getEvent() {
        return Event;
    }
    public void setEvent(String event) {
        this.Event = event;
    }
    public String getEventKey() {
        return EventKey;
    }
    public void setEventKey(String eventKey) {
        this.EventKey = eventKey;
    }
    public String getTicket() {
        return Ticket;
    }
    public void setTicket(String ticket) {
        Ticket = ticket;
    }
    public String getMediaId() {
        return MediaId;
    }
    public void setMediaId(String mediaId) {
        MediaId = mediaId;
    }
    public String getFormat() {
        return Format;
    }
    public void setFormat(String format) {
        Format = format;
    }
    public String getRecognition() {
        return Recognition;
    }
    public void setRecognition(String recognition) {
        Recognition = recognition;
    }
    public String getMsgID() {
        return MsgID;
    }
    public void setMsgID(String msgID) {
        MsgID = msgID;
    }
    public TransInfo getTransInfo() {
        return TransInfo;
    }
    public void setTransInfo(TransInfo transInfo) {
        TransInfo = transInfo;
    }
    public String getKfAccount() {
        return KfAccount;
    }
    public void setKfAccount(String kfAccount) {
        KfAccount = kfAccount;
    }
//  public String getEncrypt() {
//      return Encrypt;
//  }
//  public void setEncrypt(String encrypt) {
//      Encrypt = encrypt;
//  }
}

OutMessage

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

/**
 * 回复消息实体类
 * @author lishun
 * 
 */
public class OutMessage implements Serializable
{
    /** 接收方帐号OpenID  */
    private String ToUserName;

    /** 开发者微信号  */
    private String FromUserName;

    /** 消息创建时间  */
    private Long CreateTime;

    /** text,image,voice,video,music,news */
    private String MsgType = "text";

    /** 消息ID  */
    private Long msgId;

    /** 回复的消息内容长度不超过2048字节  */
    private String Content;

    private int FuncFlag = 0;

    /** 通过上传多媒体文件得到的ID */
    public String MediaId;

    /** 缩略图的媒体ID通过上传多媒体文件得到的ID  */
    public String ThumbMediaId;

    /** 音乐链接  */
    private String MusicUrl;

    /** 高质量音乐链接  */
    private String HQMusicUrl;

    /** 图文消息个数限制为10条以内  */
    private Integer ArticleCount;

    /** 图文消息标题  */
    private String Title;

    /** 图文消息描述  */
    private String Description;

    /** 图片链接支持JPG、PNG格式较好的效果为大图640*320小图80*80  */
    private String PicUrl;

    /** 点击图文消息跳转链接  */
    private String Url;

    private TransInfo TransInfo;

    private List<Articles> Articles;

    public String getToUserName() {
        return ToUserName;
    }

    public void setToUserName(String toUserName) {
        ToUserName = toUserName;
    }

    public String getFromUserName() {
        return FromUserName;
    }

    public void setFromUserName(String fromUserName) {
        FromUserName = fromUserName;
    }

    public Long getCreateTime() {
        return CreateTime;
    }

    public void setCreateTime(Long createTime) {
        CreateTime = createTime;
    }

    public String getMsgType() {
        return MsgType;
    }

    public void setMsgType(String msgType) {
        MsgType = msgType;
    }

    public Long getMsgId() {
        return msgId;
    }

    public void setMsgId(Long msgId) {
        this.msgId = msgId;
    }

    public String getContent() {
        return Content;
    }

    public void setContent(String content) {
        Content = content;
    }

    public int getFuncFlag() {
        return FuncFlag;
    }

    public void setFuncFlag(int funcFlag) {
        FuncFlag = funcFlag;
    }

    public String getMediaId() {
        return MediaId;
    }

    public void setMediaId(String mediaId) {
        MediaId = mediaId;
    }

    public String getThumbMediaId() {
        return ThumbMediaId;
    }

    public void setThumbMediaId(String thumbMediaId) {
        ThumbMediaId = thumbMediaId;
    }

    public String getMusicUrl() {
        return MusicUrl;
    }

    public void setMusicUrl(String musicUrl) {
        MusicUrl = musicUrl;
    }

    public String getHQMusicUrl() {
        return HQMusicUrl;
    }

    public void setHQMusicUrl(String hQMusicUrl) {
        HQMusicUrl = hQMusicUrl;
    }

    public Integer getArticleCount() {
        return ArticleCount;
    }

    public void setArticleCount(Integer articleCount) {
        ArticleCount = articleCount;
    }

    public String getTitle() {
        return Title;
    }

    public void setTitle(String title) {
        Title = title;
    }

    public String getDescription() {
        return Description;
    }

    public void setDescription(String description) {
        Description = description;
    }

    public String getPicUrl() {
        return PicUrl;
    }

    public void setPicUrl(String picUrl) {
        PicUrl = picUrl;
    }

    public String getUrl() {
        return Url;
    }

    public void setUrl(String url) {
        Url = url;
    }

    public List<Articles> getArticles() {
        return Articles;
    }

    public void setArticles(List<Articles> articles) {
        if (articles.size() > 10)
            articles = new ArrayList<Articles>(articles.subList(0, 10));
        this.Articles = articles;
    }

    public TransInfo getTransInfo() {
        return TransInfo;
    }
    public void setTransInfo(TransInfo transInfo) {
        TransInfo = transInfo;
    }
}