微信公众号事件推送(点击推送图文)

最近做微信公众号的功能,按钮菜单中有 type 为 click 的按钮,其功能是 若你配置好了服务器配置,设置后回调的url, 点击后微信会将该事件推送到配置好的地址,后台接受数据然后进行相应的处理。网上看了很多例子,学习了很多,我发现最好的还是这位博主写的文章,分享给大家:https://blog.csdn.net/tuposky/article/details/40589319

然后开始主题:

先做好前期准备:

首先做好服务器配置:

配置好url ,  记录下token,和EncodingAESKey;

然后编写代码:

controller:

package com.modou.park.controller.app.user;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.alibaba.fastjson.JSON;
import com.modou.park.service.impl.WxEventServiceImpl;
import com.modou.park.util.wxevent.SignUtil;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import springfox.documentation.annotations.ApiIgnore;

/**
 * 微信相关接口
 * 
 * @author cdj
 *
 */
@Api("微信用户相关接口")
@RestController("/WxUser")
public class WxUserController {
	@Autowired
	private WxEventServiceImpl wxEventServiceImpl;
	@Autowired

	private static final Log LOG = LogFactory.getLog(WxUserController.class);

	@ApiOperation("微信公众号服务器配置接口")
	@ApiIgnore
	@RequestMapping("/HandleWxEvent")
	public void HandleWxEvent(HttpServletRequest req, HttpServletResponse resp) throws IOException {
		req.setCharacterEncoding("UTF-8");
		resp.setCharacterEncoding("UTF-8");
		Map<String, String[]> parameterMap = req.getParameterMap();
		System.out.println("requestData:" + JSON.toJSONString(parameterMap));
		LOG.info("requestData:" + JSON.toJSONString(parameterMap));
		// 微信加密签名
		String signature = req.getParameter("signature");
		// 时间戳
		String timestamp = req.getParameter("timestamp");
		// 随机数
		String nonce = req.getParameter("nonce");
		// 随机字符串
		String echostr = req.getParameter("echostr");
		System.out.println(
				"signature=" + signature + ";timestamp=" + timestamp + ";nonce=" + nonce + ";echostr=" + echostr);
		LOG.info("signature=" + signature + ";timestamp=" + timestamp + ";nonce=" + nonce + ";echostr=" + echostr);
		PrintWriter out = resp.getWriter();
		// 通过检验signature对请求进行校验,若校验成功则原样返回echostr,表示接入成功,否则接入失败
		LOG.info("checkSignature:" + SignUtil.checkSignature(signature, timestamp, nonce));
		System.out.println("checkSignature:" + SignUtil.checkSignature(signature, timestamp, nonce));

		// 首次请求申请验证,返回echostr
		if (echostr != null) {
			out.println(echostr);
			if (out != null) {
				out.close();
			}
			return;
		}
		if (SignUtil.checkSignature(signature, timestamp, nonce)) {
			System.out.println("success");
			LOG.info("success");
			String message = "success";
			try {
				message = wxEventServiceImpl.processRequest(req);
			} catch (Exception e) {
				e.printStackTrace();
			} finally {
				out.println(message);
				if (out != null) {
					out.close();
				}
			}
		} else {
			System.out.println("The request signature is invalid");
			LOG.info("The request signature is invalid");
		}
	}

}

WxEventServiceImpl:

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Component;

import com.alibaba.fastjson.JSON;
import com.modou.park.entity.wxevent.resp.Article;
import com.modou.park.entity.wxevent.resp.NewsMessage;
import com.modou.park.service.WxEventService;
import com.modou.park.util.wxevent.EventConstant;
import com.modou.park.util.wxevent.MessageUtil;

@Component
public class WxEventServiceImpl implements WxEventService {
	private static final Log log = LogFactory.getLog(WxEventServiceImpl.class);

	@Override
	public String processRequest(HttpServletRequest req) {
		//String message = "success";
		String respMessage = null;
		try {
			// 把微信返回的xml信息转义成map
			Map<String, String> map = MessageUtil.parseXml(req);
			//Map<String, String> map = XmlUtil.xmlToMap(req);
			System.out.println(JSON.toJSONString(map));
			boolean isreturn = false;
			if (map.get("MsgType") != null) {
				if ("event".equals(map.get("MsgType"))) {
					log.info("2.1解析消息内容为:事件推送");
					if ("subscribe".equals(map.get("Event")) || "CLICK".equals(map.get("Event"))) {
						log.info("2.2用户第一次关注 返回true哦");
						isreturn = true;
					}
				}
			}
			if(isreturn == true){
	            //转换XML
				String fromUserName = map.get("FromUserName");// 消息来源用户标识
				String toUserName = map.get("ToUserName");// 消息目的用户标识
				String msgType = map.get("MsgType");// 消息类型
				String eventKey = map.get("EventKey");// 消息内容
				String eventType = map.get("Event");
				// 文本消息
				if (msgType.equals(EventConstant.REQ_MESSAGE_TYPE_EVENT)) {
					// 创建图文消息
					NewsMessage newsMessage = new NewsMessage();
					newsMessage.setToUserName(fromUserName);
					newsMessage.setFromUserName(toUserName);
					newsMessage.setCreateTime(new Date().getTime());
					newsMessage.setMsgType(EventConstant.RESP_MESSAGE_TYPE_NEWS);
					newsMessage.setFuncFlag(0);
					List<Article> articleList = new ArrayList<Article>();
					
					if ("testNews".equals(eventKey)) {
						Article article = new Article();
						article.setTitle("我是一条单图文消息");
						article.setDescription("我是描述信息,哈哈哈哈哈哈哈。。。");
						article.setPicUrl("http://www.iteye.com/upload/logo/user/603624/2dc5ec35-073c-35e7-9b88-274d6b39d560.jpg");
						article.setUrl("https://blog.csdn.net/atmknight");
						articleList.add(article);
						//多图文的话,新建多个article 放入articleList 中即可实现
						
						// 设置图文消息个数
						newsMessage.setArticleCount(articleList.size());
						// 设置图文消息包含的图文集合
						newsMessage.setArticles(articleList);
						// 将图文消息对象转换成xml字符串
						respMessage = MessageUtil.newsMessageToXml(newsMessage);
					}
				}
			}
			return respMessage;
		} catch (Exception e) {
			throw new RuntimeException(e.getMessage());
		}
	}
}

   生成一个按钮      类型为:

{
    "type": "click", 
    "name": "点击", 
    "key": "testNews"
}

以图文为例子 : 后台收到的request 内容为 :

{"CreateTime":"1533277022","EventKey":"testNews","Event":"CLICK","ToUserName":"g
h_0ffcdd3acda5","FromUserName":"o2vLnwpLUWvxHdJJDGaHUahUzhBA","MsgType":"event"}

内容具体情况可能和网上有点不同,还是以实际为准,我这个的字段好像和看到的那些博客里面写的有点不一样,所有我对代码做了一点点的改动。

反馈后公众号收到的图文信息

总的来说,图文推送不难,而且网上也有很多的例子,不过做出来之后还是很好玩的,以后也要好好的学习,多做笔记。

---------------------------------------------------------- 手动分割 ----------------------------------------------------------

下面是需要的工具类和实体类:

request  接受消息:

接受消息基础类  ( 用户-> 公众帐号) BaseMessage :

package com.modou.park.entity.wxevent.req;


/**
 * 消息体基础类
 * @author cdj
 */
public class BaseMessage {
	private String ToUserName;
	private String FromUserName;
	private long CreateTime;
	private String MsgType;
	private long MsgId;
	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) {
		MsgId = msgId;
	}
	
}

TextMessage :

package com.modou.park.entity.wxevent.req;

/**
 * 文本消息类
 * @author cdj
 */
public class TextMessage extends BaseMessage{
	private String Content;
	public String getContent() {
		return Content;
	}
	public void setContent(String content) {
		Content = content;
	}
}

ImageMessage:

package com.modou.park.entity.wxevent.req;

/**
 * 图片消息事件接受
 * @author cdj
 * @date 2018年8月3日 上午8:28:01
 */
public class ImageMessage extends BaseMessage {
	private String picUrl;
	 
	public String getPicUrl() {
		return picUrl;
	}
 
	public void setPicUrl(String picUrl) {
		this.picUrl = picUrl;
	}

}

LinkMessage:

package com.modou.park.entity.wxevent.req;

/**
 * 链接消息接受
 * @author cdj
 * @date 2018年8月3日 上午8:29:06
 */
public class LinkMessage extends BaseMessage {
	/**
	 * 消息标题
	 */
	private String Title;
	/**
	 * 消息描述
	 */
	private String Description;
	/**
	 * 消息链接
	 */
	private String Url;
 
	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 getUrl() {
		return Url;
	}
 
	public void setUrl(String url) {
		Url = url;
	}
}

LocationMessage:

package com.modou.park.entity.wxevent.req;

/**
 * 位置消息
 * @author cdj
 * @date 2018年8月3日 上午8:30:35
 */
public class LocationMessage extends BaseMessage {
	/**
	 * 地理位置维度
	 */
	private String Location_X;
	/**
	 * 地理位置经度
	 */
	private String Location_Y;
 
	/**
	 * 地图缩放大小
	 */
	private String Scale;
 
	/**
	 * 地理位置信息
	 */
	private String Label;
 
	public String getLocation_X() {
		return Location_X;
	}
 
	public void setLocation_X(String location_X) {
		Location_X = location_X;
	}
 
	public String getLocation_Y() {
		return Location_Y;
	}
 
	public void setLocation_Y(String location_Y) {
		Location_Y = location_Y;
	}
 
	public String getScale() {
		return Scale;
	}
 
	public void setScale(String scale) {
		Scale = scale;
	}
 
	public String getLabel() {
		return Label;
	}
 
	public void setLabel(String label) {
		Label = label;
	}
 
}

VoiceMessage:

package com.modou.park.entity.wxevent.req;

/**
 * 语音消息
 * 
 * @author cdj
 * @date 2018年8月3日 上午8:29:49
 */
public class VoiceMessage extends BaseMessage {
	/**
	 * 媒体ID
	 */
	private String MediaId;
	/**
	 * 语音格式
	 */
	private String Format;

	public String getMediaId() {
		return MediaId;
	}

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

	public String getFormat() {
		return Format;
	}

	public void setFormat(String format) {
		Format = format;
	}

}

================================================================================================

response 实体类

反馈消息基础类(公众帐号 -> 用户)BaseMessage:

package com.modou.park.entity.wxevent.resp;

/**
 * 消息基类(公众帐号 -> 用户)
 * @author cdj
 * @date 2018年8月3日 上午8:43:54
 */
public class BaseMessage {
	
	/**
	 * 接收方帐号(收到的OpenID)
	 */
	private String ToUserName;
	/**
	 * 开发者微信号
	 */
	private String FromUserName;
	/**
	 * 消息创建时间 (整型)
	 */
	private long CreateTime;
	
	/**
	 * 消息类型
	 */
	private String MsgType;
	
	/**
	 * 位0x0001被标志时,星标刚收到的消息
	 */
	private int FuncFlag;
 
	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 int getFuncFlag() {
		return FuncFlag;
	}
 
	public void setFuncFlag(int funcFlag) {
		FuncFlag = funcFlag;
	}
}

TextMessage:

package com.modou.park.entity.wxevent.resp;

/**
 * 文本消息
 * @author 咳嗽停不了
 * @date 2018年8月3日 上午8:44:51
 */
public class TextMessage extends BaseMessage {
	/**
	 * 回复的消息内容
	 */
	private String Content;
 
	public String getContent() {
		return Content;
	}
 
	public void setContent(String content) {
		Content = content;
	}
}

NewsMessage:

package com.modou.park.entity.wxevent.resp;


import java.util.List;
 
/**
 * 多图文消息,
 * 单图文的时候 Articles 只放一个就行了
 * @author cdj
 * @date 2018年8月3日 上午8:45:22
 */
public class NewsMessage extends BaseMessage {
	/**
	 * 图文消息个数,限制为10条以内
	 */
	private int ArticleCount;
	/**
	 * 多条图文消息信息,默认第一个item为大图
	 */
	private List<Article> Articles;
 
	public int getArticleCount() {
		return ArticleCount;
	}
 
	public void setArticleCount(int articleCount) {
		ArticleCount = articleCount;
	}
 
	public List<Article> getArticles() {
		return Articles;
	}
 
	public void setArticles(List<Article> articles) {
		Articles = articles;
	}
}

Article:

package com.modou.park.entity.wxevent.resp;

/**
 * 图文消息
 * @author cdj
 * @date 2018年8月3日 上午8:45:56
 */
public class Article {
	/**
	 * 图文消息名称
	 */
	private String Title;
 
	/**
	 * 图文消息描述
	 */
	private String Description;
 
	/**
	 * 图片链接,支持JPG、PNG格式,<br>
	 * 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;
 
	public String getTitle() {
		return Title;
	}
 
	public void setTitle(String title) {
		Title = title;
	}
 
	public String getDescription() {
		return null == Description ? "" : Description;
	}
 
	public void setDescription(String description) {
		Description = description;
	}
 
	public String getPicUrl() {
		return null == PicUrl ? "" : PicUrl;
	}
 
	public void setPicUrl(String picUrl) {
		PicUrl = picUrl;
	}
 
	public String getUrl() {
		return null == Url ? "" : Url;
	}
 
	public void setUrl(String url) {
		Url = url;
	}
 
}

MusicMessage:

package com.modou.park.entity.wxevent.resp;

/**
 * 音乐消息
 * @author cdj
 * @date 2018年8月3日 上午8:46:35
 */
public class MusicMessage extends BaseMessage {
	/**
	 * 音乐
	 */
	private Music Music;
 
	public Music getMusic() {
		return Music;
	}
 
	public void setMusic(Music music) {
		Music = music;
	}
}

Music:

package com.modou.park.entity.wxevent.resp;

/**
 * 音乐消息
 * @author cdj
 * @date 2018年8月3日 上午8:46:59
 */
public class Music {
	/**
	 * 音乐名称
	 */
	private String Title;
	
	/**
	 * 音乐描述
	 */
	private String Description;
	
	/**
	 * 音乐链接
	 */
	private String MusicUrl;
	
	/**
	 * 高质量音乐链接,WIFI环境优先使用该链接播放音乐
	 */
	private String HQMusicUrl;
 
	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 getMusicUrl() {
		return MusicUrl;
	}
 
	public void setMusicUrl(String musicUrl) {
		MusicUrl = musicUrl;
	}
 
	public String getHQMusicUrl() {
		return HQMusicUrl;
	}
 
	public void setHQMusicUrl(String musicUrl) {
		HQMusicUrl = musicUrl;
	}
 
}

    新建完后有这些

---------------------------------------------------------- 手动分割 ----------------------------------------------------------

设置微信事件常量:

EventConstant:

package com.modou.park.util.wxevent;

/**
 * 微信事件常量
 * 
 * @author cdj
 * @date 2018年8月3日 下午1:17:08
 */
public class EventConstant {
	/**
	 * 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";

	/**
	 * 返回消息类型:图片
	 */
	public static final String RESP_MESSAGE_TYPE_Image = "image";

	/**
	 * 返回消息类型:语音
	 */
	public static final String RESP_MESSAGE_TYPE_Voice = "voice";

	/**
	 * 返回消息类型:视频
	 */
	public static final String RESP_MESSAGE_TYPE_Video = "video";

	/**
	 * 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:视频
	 */
	public static final String REQ_MESSAGE_TYPE_VIDEO = "video";

	/**
	 * 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";

	/**
	 * 事件类型:VIEW(自定义菜单URl视图)
	 */
	public static final String EVENT_TYPE_VIEW = "VIEW";

	/**
	 * 事件类型:LOCATION(上报地理位置事件)
	 */
	public static final String EVENT_TYPE_LOCATION = "LOCATION";

	/**
	 * 事件类型:LOCATION(上报地理位置事件)
	 */
	public static final String EVENT_TYPE_SCAN = "SCAN";
}

MessageUtil:

package com.modou.park.util.wxevent;

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.modou.park.entity.wxevent.resp.Article;
import com.modou.park.entity.wxevent.resp.MusicMessage;
import com.modou.park.entity.wxevent.resp.NewsMessage;
import com.modou.park.entity.wxevent.resp.TextMessage;
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;

/**
 * 微信事件消息处理
 * @author cdj
 * @date 2018年8月3日 上午9:26:27
 */
public class MessageUtil {

	/**
	 * 解析微信发来的请求(XML)
	 * 
	 * @param request
	 * @return
	 * @throws Exception
	 */
	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>();
		// 读取输入流
		SAXReader reader = new SAXReader();
		// 从request中取得输入流
		InputStream inputStream = request.getInputStream();
		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

		@SuppressWarnings("unchecked")
		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;
	}

	/**
	 * 文本消息对象转换成xml
	 * 
	 * @param textMessage
	 *            文本消息对象
	 * @return xml
	 */
	public static String textMessageToXml(TextMessage textMessage) {
		xstream.alias("xml", textMessage.getClass());
		return xstream.toXML(textMessage);
	}

	/**
	 * 音乐消息对象转换成xml
	 * 
	 * @param musicMessage
	 *            音乐消息对象
	 * @return xml
	 */
	public static String musicMessageToXml(MusicMessage musicMessage) {
		xstream.alias("xml", musicMessage.getClass());
		return xstream.toXML(musicMessage);
	}

	/**
	 * 图文消息对象转换成xml
	 * 
	 * @param newsMessage
	 *            图文消息对象
	 * @return xml
	 */
	public static String newsMessageToXml(NewsMessage newsMessage) {
		xstream.alias("xml", newsMessage.getClass());
		xstream.alias("item", new Article().getClass());
		return xstream.toXML(newsMessage);
	}

	/**
	 * 扩展xstream,使其支持CDATA块
	 * 
	 */
	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;

				protected void writeText(QuickWriter writer, String text) {
					if (cdata) {
						writer.write("<![CDATA[");
						writer.write(text);
						writer.write("]]>");
					} else {
						writer.write(text);
					}
				}
			};
		}
	});

}

SignUtil:

package com.modou.park.util.wxevent;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * 请求校验工具类
 */
public class SignUtil {
	// 与公众接口配置信息中的Token要一致
	private static String token = "xxxxxx";

	public static boolean checkSignature(String signature, String timestamp, String nonce) {
		// 从请求中(也就是微信服务器传过来的)拿到的token, timestamp, nonce
		String[] arr = new String[] { token, timestamp, nonce };
		// 将token、timestamp、nonce三个参数进行字典序排序
		sort(arr);
		StringBuilder content = new StringBuilder();
		for (int i = 0; i < arr.length; i++) {
			content.append(arr[i]);
		}
		MessageDigest md = null;
		String tmpStr = null;

		try {
			md = MessageDigest.getInstance("SHA-1");
			// 将三个参数字符串拼接成一个字符串进行sha1加密
			byte[] digest = md.digest(content.toString().getBytes());
			// 将字节数组转成字符串
			tmpStr = byteToStr(digest);
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}

		content = null;
		// 将sha1加密后的字符串可与signature对比,标识该请求来源于微信
		return tmpStr != null ? tmpStr.equals(signature.toUpperCase()) : false;
	}

	// 将加密后的字节数组变成字符串
	private static String byteToStr(byte[] byteArray) {
		String strDigest = "";
		for (int i = 0; i < byteArray.length; i++) {
			strDigest += byteToHexStr(byteArray[i]);
		}
		return strDigest;
	}

	private static String byteToHexStr(byte mByte) {
		char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
		char[] tempArr = new char[2];
		tempArr[0] = Digit[(mByte >>> 4) & 0X0F];
		tempArr[1] = Digit[mByte & 0X0F];

		String s = new String(tempArr);
		return s;
	}

	// 用于字典排序
	public static void sort(String a[]) {
		for (int i = 0; i < a.length - 1; i++) {
			for (int j = i + 1; j < a.length; j++) {
				if (a[j].compareTo(a[i]) < 0) {
					String temp = a[i];
					a[i] = a[j];
					a[j] = temp;
				}
			}
		}
	}
}

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转载自blog.csdn.net/atmknight/article/details/81387894