/**
* 请求校验工具类
*/
public class SignUtil {
// 与接口配置信息中的Token要一致,我的是明文格式
private static String token = "填写你服务器配置时写的token";
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;
}
}
}
}
}
//事件响应的接口
@RequestMapping(value="/GZHConcern.do")
public void GZHConcern(HttpServletRequest request, HttpServletResponse response) throws IOException {
String message = "success";
// 微信加密签名
String signature = request.getParameter("signature");
// 时间戳
String timestamp = request.getParameter("timestamp");
// 随机数
String nonce = request.getParameter("nonce");
// 随机字符串
String echostr = request.getParameter("echostr");
PrintWriter out = response.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
if (SignUtil.checkSignature(signature, timestamp, nonce)) {
out.print(echostr);
//在这里相应微信的操作
}
try {
Map<String, String> map = XmlUtil.xmlToMap(request);
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 content = map.get("Content");//消息内容
String eventType = map.get("Event");
WeixinUser weixinUser = new WeixinUser();
if(MessageUtil.MSGTYPE_EVENT.equals(msgType)){//如果为事件类型
if(MessageUtil.MESSAGE_SUBSCIBE.equals(eventType)){//处理订阅事件
//获取token
String token = WXUtil.getGZHToken();
weixinUser = WXUtil.getUnionid(fromUserName, token);
//进行数据库的操作
weixinUser.setNickname(weixinUser.getNickname());
int row = gzhService.addGZHUser(weixinUser);
//通过openid获取用户的数据
message = MessageUtil.subscribeForText(toUserName, fromUserName);
}else if(MessageUtil.MESSAGE_UNSUBSCIBE.equals(eventType)){//处理取消订阅事件
message = MessageUtil.unsubscribe(toUserName, fromUserName);
weixinUser.setOpenid(fromUserName);
//进行数据库的操作
int row = gzhService.deleteGZHUser(weixinUser);
}
}
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
out.close();
}
out = null;
}
/*
* 消息处理工具类
*/
public class MessageUtil {
public static final String MSGTYPE_EVENT = "event";//消息类型--事件
public static final String MESSAGE_SUBSCIBE = "subscribe";//消息事件类型--订阅事件
public static final String MESSAGE_UNSUBSCIBE = "unsubscribe";//消息事件类型--取消订阅事件
public static final String MESSAGE_TEXT = "text";//消息类型--文本消息
/*
* 组装文本消息
*/
public static String textMsg(String toUserName,String fromUserName,String content){
TextMessage text = new TextMessage();
text.setFromUserName(toUserName);
text.setToUserName(fromUserName);
text.setMsgType(MESSAGE_TEXT);
text.setCreateTime(new Date().getTime());
text.setContent(content);
return XmlUtil.textMsgToxml(text);
}
/*
* 响应订阅事件--回复文本消息
*/
public static String subscribeForText(String toUserName,String fromUserName){
return textMsg(toUserName, fromUserName, "欢迎关注,精彩内容不容错过!!!");
}
/*
* 响应取消订阅事件
*/
public static String unsubscribe(String toUserName,String fromUserName){
//TODO 可以进行取关后的其他后续业务处理
System.out.println("用户:"+ fromUserName +"取消关注~");
return "";
}
}
/*
* xml处理工具类
*/
public class XmlUtil {
/*
* xml转map
*/
public static Map<String, String> xmlToMap(HttpServletRequest request) throws IOException, DocumentException{
HashMap<String, String> map = new HashMap<String,String>();
SAXReader reader = new SAXReader();
InputStream ins = request.getInputStream();
Document doc = reader.read(ins);
Element root = doc.getRootElement();
@SuppressWarnings("unchecked")
List<Element> list = (List<Element>)root.elements();
for(Element e:list){
map.put(e.getName(), e.getText());
}
ins.close();
return map;
}
/*
* 文本消息对象转xml
*/
public static String textMsgToxml(TextMessage textMessage){
XStream xstream = new XStream();
xstream.alias("xml", textMessage.getClass());
return xstream.toXML(textMessage);
}
}
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