小弟初次寫，寫的不好，大神多多關照
總共分爲兩部分：
1.授權，微信每10分鐘會給第三方平臺推送一次，這裏有需要用到的 COMPONENT_VERIFY_TICKET，並且需要響應 success。
請求的內容（通過request.getParameter()可以取到）：
msg_signature、signature、timestamp、nonce
請求內容主體（通過流的方式可以讀取）：
<xml> <AppId><![CDATA[wxde4c1]]></AppId> <Encrypt><![CDATA[AjNYHkpxXdv99o/AV0HyklxjMFtPpRlP1VGKiAm92dyUusRZ8tpuzxBocKxtOFV04NABs7vchuRM2sBTjvb8emGMRDmhHGkMeb9933Usl8eOcFo60yj32BnxkxrmRUx8BeNRtAu98qfE72kfsUsbTyZE9FHp2xNjM75KEq8jh29eK/Rt6GVadzz9DO+qSEu+XRB0A3m5CzQ6nYDyTwDz7w01kKhx9PBHFBvnkh3p4bWV3ATNPR5+xm5/z0p8O6VGMeWkhv7XjGgk3WPcHYRtZMn/CZB2aKuxsosl3MCr1OADLLSJ+J4vGNdShMxLmUSJKR7E8SANFZUOiKOMFPmh62x3sJu4PXaLX15kzfT8DB1A3BW6g/ErEE9n+c3N4MIUW/ac/5sKeG7IjsJOgH3tfJfG4qSYuOyBKbqFyWqaZWxW/L+M=]]></Encrypt></xml>
需要注意的是，並不是整個xml都加密，只是加密了<Encrypt></Encrypt>
解密後可以得到新的xml:
<xml><AppId><![CDATA[wxde71bfe4c1]]></AppId>
<CreateTime>1558420435</CreateTime>
<InfoType><![CDATA[componencket]]></InfoType>
<ComponentVerifyTicket><![CDATA[ticket@@@DVkcsSTOEjZIwpJe5Wzwx9eZM1eZVQnzi2Y3KrorUL8vg]]></ComponentVerifyTicket>
</xml>
其中<ComponentVerifyTicket>是我們需要的ticket(建議緩存起來)，需要注意的是ticket@@@需要接去掉。
2.文本消息和事件消息
文本消息分爲兩種：a.固定內容 b.不響應，使用客服消息
代碼：
@RestController
@RequestMapping("/wx")
public class WxController {
/**
* 微信全網測試賬號
*/
private final static String COMPONENT_APPID = "";//第三方平臺APPID
private final String COMPONENT_APPSECRET = "";//第三方平臺APPSECRET
private final static String COMPONENT_ENCODINGAESKEY = "";//消息加解密Key
private final static String COMPONENT_TOKEN = "";//消息校驗Token
/**
* 消息和事件
* 消息與事件接收URL http://xxxxxxx/nrm/wx/$APPID$/callback
* @throws IOException
*/
@RequestMapping("/{appid}/callback")
public void acceptMessageAndEvent(HttpServletRequest request, HttpServletResponse response) throws DocumentException, IOException, AesException {
System.out.println("--------------------------------微信公衆號第三方平臺全網發佈---------------------------------------");
System.out.println("--------------------------------普通消息和事件消息--------------------------------");
System.out.println("--------------------------------驗證 msg_signature--------------------------------");
String msgSignature = request.getParameter("msg_signature");
System.out.println("msg_signature=" + msgSignature);
if (!StringUtils.isNotBlank(msgSignature))
return;// 微信推送給第三方開放平臺的消息一定是加過密的，無消息加密無法解密消息
StringBuilder sb = new StringBuilder();
BufferedReader in = request.getReader();
String line;
while ((line = in.readLine()) != null) {
sb.append(line);
}
in.close();
String xml = sb.toString();
System.out.println("--------------------------------接收到請求內容（加密）--------------------------------");
System.out.println("--------------------------------原始 xml=" + xml);
checkWeixinAllNetworkCheck(request,response,xml);
}
public void checkWeixinAllNetworkCheck(HttpServletRequest request, HttpServletResponse response,String xml) throws DocumentException, IOException, AesException{
String nonce = request.getParameter("nonce");
String timestamp = request.getParameter("timestamp");
String msgSignature = request.getParameter("msg_signature");
WXBizMsgCrypt pc = new WXBizMsgCrypt(COMPONENT_TOKEN, COMPONENT_ENCODINGAESKEY, COMPONENT_APPID);
xml = pc.decryptMsg(msgSignature, timestamp, nonce, xml);
System.out.println("--------------------------------解密 xml=" + xml);
Document doc = DocumentHelper.parseText(xml);
Element rootElt = doc.getRootElement();
String msgType = rootElt.elementText("MsgType");
String toUserName = rootElt.elementText("ToUserName");
String fromUserName = rootElt.elementText("FromUserName");
if("event".equals(msgType)){
String event = rootElt.elementText("Event");
replyEventMessage(request,response,event,toUserName,fromUserName);
}else if("text".equals(msgType)){
String content = rootElt.elementText("Content");
processTextMessage(request,response,content,toUserName,fromUserName);
}
}
/**
* 文本消息處理
* @param request 請求
* @param response 響應
* @param content 消息內容
* @param toUserName 微信公衆號
* @param fromUserName 微信粉絲
* @throws IOException
* @throws DocumentException
*/
public void processTextMessage(HttpServletRequest request, HttpServletResponse response,String content,String toUserName, String fromUserName) throws IOException, DocumentException{
if("TESTCOMPONENT_MSG_TYPE_TEXT".equals(content)){
//固定請求內容，直接返回
String returnContent = content+"_callback";
replyTextMessage(request,response,returnContent,toUserName,fromUserName);
}else if(StringUtils.startsWithIgnoreCase(content, "QUERY_AUTH_CODE")){
//固定內容，響應後需要客服主動發送一條消息給微信粉絲（不需要加密）
output(response, "");
//接下來客服API再回復一次消息
replyApiTextMessage(request,response,content.split(":")[1],fromUserName);
}
}
/**
* 回覆事件消息
* @param request
* @param response
* @param event
* @param toUserName
* @param fromUserName
* @throws DocumentException
* @throws IOException
*/
public void replyEventMessage(HttpServletRequest request, HttpServletResponse response, String event, String toUserName, String fromUserName) throws DocumentException, IOException {
System.out.println("&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&回覆事件消息&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&");
String content = event + "from_callback";
replyTextMessage(request,response,content,toUserName,fromUserName);
}
/**
* 回覆微信服務器"文本消息"
* @param request 請求
* @param response 響應
* @param content 內容
* @param toUserName 微信公衆號
* @param fromUserName 微信粉絲
* @throws DocumentException
* @throws IOException
*/
public void replyTextMessage(HttpServletRequest request, HttpServletResponse response, String content, String toUserName, String fromUserName) throws DocumentException, IOException {
System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!回覆微信的文本消息!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
Long createTime = System.currentTimeMillis();
StringBuffer sb = new StringBuffer();
sb.append("<xml>");
sb.append("<ToUserName><![CDATA["+fromUserName+"]]></ToUserName>");
sb.append("<FromUserName><![CDATA["+toUserName+"]]></FromUserName>");
sb.append("<CreateTime>"+createTime+"</CreateTime>");
sb.append("<MsgType><![CDATA[text]]></MsgType>");
sb.append("<Content><![CDATA["+content+"]]></Content>");
sb.append("</xml>");
String replyMsg = sb.toString();
String returnvaleue = "";
try {
WXBizMsgCrypt pc = new WXBizMsgCrypt(COMPONENT_TOKEN, COMPONENT_ENCODINGAESKEY, COMPONENT_APPID);
returnvaleue = pc.encryptMsg(replyMsg, createTime.toString(), "easemob");
} catch (AesException e) {
e.printStackTrace();
}
output(response, returnvaleue);
}
/**
* 發送客服消息
* @param auth_code 授權碼
* @param fromUserName
* @throws DocumentException
* @throws IOException
*/
public void replyApiTextMessage(HttpServletRequest request, HttpServletResponse response, String auth_code, String fromUserName) throws DocumentException, IOException {
System.out.println("##############################################發送客服消息##############################################");
CloseableHttpClient client = null;
CloseableHttpResponse response1 = null;
try {
RedisUtil redisUtil = SpringUtil.getBean(RedisUtil.class);
String authorizer_access_token = (String) redisUtil.get("so_release_access_token");
if(authorizer_access_token == null || "".equals(authorizer_access_token))
authorizer_access_token = getAuthorizerAccessToken(auth_code);
System.out.println("##################################access_token#################################" + authorizer_access_token);
String param = "{\"touser\":\"" + fromUserName + "\",\"msgtype\":\"text\",\"text\":{\"content\":\"" + auth_code + "_from_api\"}}";
System.out.println("###################################請求主體#####################################" + param);
HttpPost post = new HttpPost("https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token=" + authorizer_access_token);
post.setHeader("Content-Type","application/json");
post.setEntity(new StringEntity(param));
client = HttpClients.createDefault();
response1 = client.execute(post);
if(response1 != null && response1.getEntity() != null){
String result = EntityUtils.toString(response1.getEntity(), "UTF-8");
System.out.println("###############################發送客服消息響應結果：" + result);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if(response1 != null){
response1.close();
}
if(client != null){
client.close();
}
}
}
//---------------------------------------------------------------以上是文本消息、普通消息和事件消息----------------------------------------------------------------------------------
/**
* 授權，獲取component_verify_ticket
* 此請求的連接需要和微信公衆號第三方平臺，開發資料，授權事件接收URL保持一致，可以獲取到 COMPONENT_VERIFY_TICKET
* 需要響應給微信success
* 授權事件接收URL: http://xxxxxxxx/nrm/wx/authorization
*/
@RequestMapping("/authorization")
public void authorization(HttpServletRequest request, HttpServletResponse response) throws IOException, DocumentException, AesException {
System.out.println("********************************微信第三方平臺 授權推送事件********************************");
processAuthorizeEvent(request);
output(response, "success");
}
/**
* 處理授權事件的推送
*/
public void processAuthorizeEvent(HttpServletRequest request) throws IOException, DocumentException, AesException {
String nonce = request.getParameter("nonce");
String timestamp = request.getParameter("timestamp");
String signature = request.getParameter("signature");
String msgSignature = request.getParameter("msg_signature");
if (!StringUtils.isNotBlank(msgSignature))
return;// 微信推送給第三方開放平臺的消息一定是加過密的，無消息加密無法解密消息
boolean isValid = checkSignature(COMPONENT_TOKEN, signature, timestamp, nonce);
if (isValid) {
StringBuilder sb = new StringBuilder();
BufferedReader in = request.getReader();
String line;
while ((line = in.readLine()) != null) {
sb.append(line);
}
String xml = sb.toString();
System.out.println("********************************解密前 xml=" + xml);
WXBizMsgCrypt pc = new WXBizMsgCrypt(COMPONENT_TOKEN, COMPONENT_ENCODINGAESKEY, COMPONENT_APPID);
Map<String, String> requestMap = XmlUtil.xmlToMap(xml);
xml = pc.decrypt(requestMap.get("Encrypt"));
System.out.println("********************************解密後 xml=" + xml);
processAuthorizationEvent(xml);
}
}
/**
* 獲取第三方平臺component_access_token
* 根據component_appid、component_appsecret（即在微信開放平臺管理中心的第三方平臺詳情頁中appId和appsecret）
* 和component_verify_ticket來獲取自己的接口調用憑證（component_access_token）
* component_access_token 有效期2小時
* @return
*/
String getAccessToken(){
CloseableHttpClient client = null;
CloseableHttpResponse response = null;
try{
RedisUtil redisUtil = SpringUtil.getBean(RedisUtil.class);
String param = "{\"component_appid\":\"" + COMPONENT_APPID + "\",\"component_appsecret\":\"" + COMPONENT_APPSECRET + "\",\"component_verify_ticket\":\"" + (String)redisUtil.get("component_verify_ticket") + "\"}";
HttpPost post = new HttpPost("https://api.weixin.qq.com/cgi-bin/component/api_component_token");
post.setHeader("Content-Type","application/json");
post.setEntity(new StringEntity(param));
client = HttpClients.createDefault();
response = client.execute(post);
if(response != null && response.getEntity() != null){
JSONObject result = JSONObject.parseObject(EntityUtils.toString(response.getEntity(), "UTF-8"));
return result.getString("component_access_token");
}
} catch (Exception e){
e.printStackTrace();
} finally {
if(response != null){
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(client != null){
try {
client.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return null;
}
/**
* 獲取預授權碼pre_auth_code
* @return
*/
String getPreAuthCode(){
CloseableHttpClient client = null;
CloseableHttpResponse response = null;
try{
String component_access_token = getAccessToken();
if(Strings.isNotEmpty(component_access_token)) {
String parame = "{\"component_appid\":\"" + COMPONENT_APPID + "\"}";
HttpPost post = new HttpPost("https://api.weixin.qq.com/cgi-bin/component/api_create_preauthcode?component_access_token=" + component_access_token);
post.setHeader("Content-Type", "application/json");
post.setEntity(new StringEntity(parame));
client = HttpClients.createDefault();
response = client.execute(post);
if(response != null && response.getEntity() != null){
JSONObject result = JSONObject.parseObject(EntityUtils.toString(response.getEntity(), "UTF-8"));
return result.getString("pre_auth_code");
}
}else{
System.out.println("獲取 component_access_token 異常");
}
} catch (Exception e){
e.printStackTrace();
} finally {
if(response != null){
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(client != null){
try {
client.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return null;
}
/**
* 使用授權碼換取公衆號的授權信息
* @return 授權方令牌（在授權的公衆號具備API權限時，纔有此返回值）
*/
public String getAuthorizerAccessToken(String auth_code){
CloseableHttpClient client = null;
CloseableHttpResponse response = null;
try {
String component_access_token = getAccessToken();
//使用授權碼換取公衆號的授權信息
String data = "{\"component_appid\":\"" + COMPONENT_APPID + "\",\"authorization_code\":\"" + auth_code + "\"}";
HttpPost post = new HttpPost("https://api.weixin.qq.com/cgi-bin/component/api_query_auth?component_access_token=" + component_access_token);
post.setHeader("Content-Type","application/json");
post.setEntity(new StringEntity(data));
client = HttpClients.createDefault();
response = client.execute(post);
if(response != null && response.getEntity() != null){
//響應信息
/*{"authorization_info": {
"authorizer_appid": "wxf8b4f85f3a794e77",
"authorizer_access_token": "QXjUqNqfYVH0yBE1iI_7vuN_9gQbpjfK7hYwJ3P7xOa88a89-Aga5x1NMYJyB8G2yKt1KCl0nPC3W9GJzw0Zzq_dBxc8pxIGUNi_bFes0qM",
"expires_in": 7200,
"authorizer_refresh_token": "dTo-YCXPL4llX-u1W1pPpnp8Hgm4wpJtlR6iV0doKdY",
"func_info": [
{"funcscope_category": {"id": 1}},
{"funcscope_category": {"id": 2}},
{"funcscope_category": {"id": 3}}
]}
}
*/
JSONObject result = JSONObject.parseObject(EntityUtils.toString(response.getEntity(), "UTF-8"));
JSONObject authorization_info = result.getJSONObject("authorization_info");
String so_release_access_token = authorization_info.getString("authorizer_access_token");//授權access_token
Long expires_in = authorization_info.getLong("expires_in");//有效期
RedisUtil redisUtil = SpringUtil.getBean(RedisUtil.class);
redisUtil.set("so_release_access_token", so_release_access_token, expires_in);
return so_release_access_token;
}
} catch (Exception e){
e.printStackTrace();
} finally {
if(response != null){
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(client != null){
try {
client.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return null;
}
/**
* 獲取授權的Appid
*/
String getAuthorizerAppidFromXml(String xml) {
Document doc;
try {
doc = DocumentHelper.parseText(xml);
Element rootElt = doc.getRootElement();
String toUserName = rootElt.elementText("ToUserName");
return toUserName;
} catch (DocumentException e) {
e.printStackTrace();
}
return null;
}
//----------------------------------------------------------------以上是微信公衆號全網發佈檢測授權----------------------------------------------------------------------------
/**
* 保存Ticket
*/
public void processAuthorizationEvent(String xml){
Document doc;
try {
doc = DocumentHelper.parseText(xml);
Element rootElt = doc.getRootElement();
String ticket = rootElt.elementText("ComponentVerifyTicket");
System.out.println("*****************************************ticket=" + ticket);
if(ticket != null && !"".equals(ticket)) {
RedisUtil redisUtil = SpringUtil.getBean(RedisUtil.class);
redisUtil.set("component_verify_ticket", ticket.substring(ticket.indexOf("@@@") + 3));
}
} catch (DocumentException e) {
e.printStackTrace();
}
}
/**
* 判斷是否加密
*/
public static boolean checkSignature(String token,String signature,String timestamp,String nonce){
System.out.println("###token:"+token+";signature:"+signature+";timestamp:"+timestamp+"nonce:"+nonce);
boolean flag = false;
if(signature!=null && !signature.equals("") && timestamp!=null && !timestamp.equals("") && nonce!=null && !nonce.equals("")){
String sha1 = "";
String[] ss = new String[] { token, timestamp, nonce };
Arrays.sort(ss);
for (String s : ss) {
sha1 += s;
}
sha1 = AddSHA1.SHA1(sha1);
if (sha1.equals(signature)){
flag = true;
}
}
return flag;
}
/**
* 工具類：回覆微信服務器"文本消息"
*/
public void output(HttpServletResponse response,String returnvaleue){
try {
PrintWriter pw = response.getWriter();
pw.write(returnvaleue);
pw.flush();
} catch (IOException e) {
e.printStackTrace();
}
}
//-------------------------------------------------------------------以上是通用工具方法---------------------------------------------------------------------------------------
}
加密解密（此部分是我從微信官網下載，修改了其中一個解密的作用域）：
package jc.wx.networkreleasemonitoring.networkreleasemonitoring.utils;
/**
* 對公衆平臺發送給公衆賬號的消息加解密示例代碼.
*
* @copyright Copyright (c) 1998-2014 Tencent Inc.
*/
// ------------------------------------------------------------------------
/**
* 針對org.apache.commons.codec.binary.Base64，
* 需要導入架包commons-codec-1.9（或commons-codec-1.8等其他版本）
* 官方下載地址：http://commons.apache.org/proper/commons-codec/download_codec.cgi
*/
import java.io.StringReader;
import java.nio.charset.Charset;
import java.security.MessageDigest;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Random;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.apache.commons.codec.binary.Base64;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
/**
* 提供接收和推送給公衆平臺消息的加解密接口(UTF8編碼的字符串).
* <ol>
* <li>第三方回覆加密消息給公衆平臺</li>
* <li>第三方收到公衆平臺發送的消息，驗證消息的安全性，並對消息進行解密。</li>
* </ol>
* 說明：異常java.security.InvalidKeyException:illegal Key Size的解決方案
* <ol>
* <li>在官方網站下載JCE無限制權限策略文件（JDK7的下載地址：
* http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html</li>
* <li>下載後解壓，可以看到local_policy.jar和US_export_policy.jar以及readme.txt</li>
* <li>如果安裝了JRE，將兩個jar文件放到%JRE_HOME%\lib\security目錄下覆蓋原來的文件</li>
* <li>如果安裝了JDK，將兩個jar文件放到%JDK_HOME%\jre\lib\security目錄下覆蓋原來文件</li>
* </ol>
*/
public class WXBizMsgCrypt {
static Charset CHARSET = Charset.forName("utf-8");
Base64 base64 = new Base64();
byte[] aesKey;
String token;
String appId;
/**
* 構造函數
* @param token 公衆平臺上，開發者設置的token
* @param encodingAesKey 公衆平臺上，開發者設置的EncodingAESKey
* @param appId 公衆平臺appid
*
* @throws AesException 執行失敗，請查看該異常的錯誤碼和具體的錯誤信息
*/
public WXBizMsgCrypt(String token, String encodingAesKey, String appId) throws AesException {
if (encodingAesKey.length() != 43) {
throw new AesException(AesException.IllegalAesKey);
}
this.token = token;
this.appId = appId;
aesKey = Base64.decodeBase64(encodingAesKey + "=");
}
// 生成4個字節的網絡字節序
byte[] getNetworkBytesOrder(int sourceNumber) {
byte[] orderBytes = new byte[4];
orderBytes[3] = (byte) (sourceNumber & 0xFF);
orderBytes[2] = (byte) (sourceNumber >> 8 & 0xFF);
orderBytes[1] = (byte) (sourceNumber >> 16 & 0xFF);
orderBytes[0] = (byte) (sourceNumber >> 24 & 0xFF);
return orderBytes;
}
// 還原4個字節的網絡字節序
int recoverNetworkBytesOrder(byte[] orderBytes) {
int sourceNumber = 0;
for (int i = 0; i < 4; i++) {
sourceNumber <<= 8;
sourceNumber |= orderBytes[i] & 0xff;
}
return sourceNumber;
}
// 隨機生成16位字符串
String getRandomStr() {
String base = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
Random random = new Random();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < 16; i++) {
int number = random.nextInt(base.length());
sb.append(base.charAt(number));
}
return sb.toString();
}
/**
* 對明文進行加密.
*
* @param text 需要加密的明文
* @return 加密後base64編碼的字符串
* @throws AesException aes加密失敗
*/
String encrypt(String randomStr, String text) throws AesException {
ByteGroup byteCollector = new ByteGroup();
byte[] randomStrBytes = randomStr.getBytes(CHARSET);
byte[] textBytes = text.getBytes(CHARSET);
byte[] networkBytesOrder = getNetworkBytesOrder(textBytes.length);
byte[] appidBytes = appId.getBytes(CHARSET);
// randomStr + networkBytesOrder + text + appid
byteCollector.addBytes(randomStrBytes);
byteCollector.addBytes(networkBytesOrder);
byteCollector.addBytes(textBytes);
byteCollector.addBytes(appidBytes);
// ... + pad: 使用自定義的填充方式對明文進行補位填充
byte[] padBytes = PKCS7Encoder.encode(byteCollector.size());
byteCollector.addBytes(padBytes);
// 獲得最終的字節流, 未加密
byte[] unencrypted = byteCollector.toBytes();
try {
// 設置加密模式爲AES的CBC模式
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
SecretKeySpec keySpec = new SecretKeySpec(aesKey, "AES");
IvParameterSpec iv = new IvParameterSpec(aesKey, 0, 16);
cipher.init(Cipher.ENCRYPT_MODE, keySpec, iv);
// 加密
byte[] encrypted = cipher.doFinal(unencrypted);
// 使用BASE64對加密後的字符串進行編碼
String base64Encrypted = base64.encodeToString(encrypted);
return base64Encrypted;
} catch (Exception e) {
e.printStackTrace();
throw new AesException(AesException.EncryptAESError);
}
}
/**
* 對密文進行解密.
*
* @param text 需要解密的密文
* @return 解密得到的明文
* @throws AesException aes解密失敗
*/
public String decrypt(String text) throws AesException {
byte[] original;
try {
// 設置解密模式爲AES的CBC模式
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
SecretKeySpec key_spec = new SecretKeySpec(aesKey, "AES");
IvParameterSpec iv = new IvParameterSpec(Arrays.copyOfRange(aesKey, 0, 16));
cipher.init(Cipher.DECRYPT_MODE, key_spec, iv);
// 使用BASE64對密文進行解碼
byte[] encrypted = Base64.decodeBase64(text);
// 解密
original = cipher.doFinal(encrypted);
} catch (Exception e) {
e.printStackTrace();
throw new AesException(AesException.DecryptAESError);
}
String xmlContent, from_appid;
try {
// 去除補位字符
byte[] bytes = PKCS7Encoder.decode(original);
// 分離16位隨機字符串,網絡字節序和AppId
byte[] networkOrder = Arrays.copyOfRange(bytes, 16, 20);
int xmlLength = recoverNetworkBytesOrder(networkOrder);
xmlContent = new String(Arrays.copyOfRange(bytes, 20, 20 + xmlLength), CHARSET);
from_appid = new String(Arrays.copyOfRange(bytes, 20 + xmlLength, bytes.length),
CHARSET);
} catch (Exception e) {
e.printStackTrace();
throw new AesException(AesException.IllegalBuffer);
}
// appid不相同的情況
if (!from_appid.equals(appId)) {
throw new AesException(AesException.ValidateAppidError);
}
return xmlContent;
}
/**
* 將公衆平臺回覆用戶的消息加密打包.
* <ol>
* <li>對要發送的消息進行AES-CBC加密</li>
* <li>生成安全簽名</li>
* <li>將消息密文和安全簽名打包成xml格式</li>
* </ol>
*
* @param replyMsg 公衆平臺待回覆用戶的消息，xml格式的字符串
* @param timeStamp 時間戳，可以自己生成，也可以用URL參數的timestamp
* @param nonce 隨機串，可以自己生成，也可以用URL參數的nonce
*
* @return 加密後的可以直接回複用戶的密文，包括msg_signature, timestamp, nonce, encrypt的xml格式的字符串
* @throws AesException 執行失敗，請查看該異常的錯誤碼和具體的錯誤信息
*/
public String encryptMsg(String replyMsg, String timeStamp, String nonce) throws AesException {
// 加密
String encrypt = encrypt(getRandomStr(), replyMsg);
// 生成安全簽名
if (timeStamp == "") {
timeStamp = Long.toString(System.currentTimeMillis());
}
String signature = SHA1.getSHA1(token, timeStamp, nonce, encrypt);
// System.out.println("發送給平臺的簽名是: " + signature[1].toString());
// 生成發送的xml
String result = XMLParse.generate(encrypt, signature, timeStamp, nonce);
return result;
}
/**
* 檢驗消息的真實性，並且獲取解密後的明文.
* <ol>
* <li>利用收到的密文生成安全簽名，進行簽名驗證</li>
* <li>若驗證通過，則提取xml中的加密消息</li>
* <li>對消息進行解密</li>
* </ol>
*
* @param msgSignature 簽名串，對應URL參數的msg_signature
* @param timeStamp 時間戳，對應URL參數的timestamp
* @param nonce 隨機串，對應URL參數的nonce
* @param postData 密文，對應POST請求的數據
*
* @return 解密後的原文
* @throws AesException 執行失敗，請查看該異常的錯誤碼和具體的錯誤信息
*/
public String decryptMsg(String msgSignature, String timeStamp, String nonce, String postData)
throws AesException {
// 密鑰，公衆賬號的app secret
// 提取密文
Object[] encrypt = XMLParse.extract(postData);
// 驗證安全簽名
String signature = SHA1.getSHA1(token, timeStamp, nonce, encrypt[1].toString());
// 和URL中的簽名比較是否相等
// System.out.println("第三方收到URL中的簽名：" + msg_sign);
// System.out.println("第三方校驗簽名：" + signature);
if (!signature.equals(msgSignature)) {
throw new AesException(AesException.ValidateSignatureError);
}
// 解密
String result = decrypt(encrypt[1].toString());
return result;
}
/**
* 驗證URL
* @param msgSignature 簽名串，對應URL參數的msg_signature
* @param timeStamp 時間戳，對應URL參數的timestamp
* @param nonce 隨機串，對應URL參數的nonce
* @param echoStr 隨機串，對應URL參數的echostr
*
* @return 解密之後的echostr
* @throws AesException 執行失敗，請查看該異常的錯誤碼和具體的錯誤信息
*/
public String verifyUrl(String msgSignature, String timeStamp, String nonce, String echoStr)
throws AesException {
String signature = SHA1.getSHA1(token, timeStamp, nonce, echoStr);
if (!signature.equals(msgSignature)) {
throw new AesException(AesException.ValidateSignatureError);
}
String result = decrypt(echoStr);
return result;
}
}
class ByteGroup {
ArrayList<Byte> byteContainer = new ArrayList<Byte>();
public byte[] toBytes() {
byte[] bytes = new byte[byteContainer.size()];
for (int i = 0; i < byteContainer.size(); i++) {
bytes[i] = byteContainer.get(i);
}
return bytes;
}
public ByteGroup addBytes(byte[] bytes) {
for (byte b : bytes) {
byteContainer.add(b);
}
return this;
}
public int size() {
return byteContainer.size();
}
}
/**
* SHA1 class
*
* 計算公衆平臺的消息簽名接口.
*/
class SHA1 {
/**
* 用SHA1算法生成安全簽名
* @param token 票據
* @param timestamp 時間戳
* @param nonce 隨機字符串
* @param encrypt 密文
* @return 安全簽名
* @throws AesException
*/
public static String getSHA1(String token, String timestamp, String nonce, String encrypt) throws AesException
{
try {
String[] array = new String[] { token, timestamp, nonce, encrypt };
StringBuffer sb = new StringBuffer();
// 字符串排序
Arrays.sort(array);
for (int i = 0; i < 4; i++) {
sb.append(array[i]);
}
String str = sb.toString();
// SHA1簽名生成
MessageDigest md = MessageDigest.getInstance("SHA-1");
md.update(str.getBytes());
byte[] digest = md.digest();
StringBuffer hexstr = new StringBuffer();
String shaHex = "";
for (int i = 0; i < digest.length; i++) {
shaHex = Integer.toHexString(digest[i] & 0xFF);
if (shaHex.length() < 2) {
hexstr.append(0);
}
hexstr.append(shaHex);
}
return hexstr.toString();
} catch (Exception e) {
e.printStackTrace();
throw new AesException(AesException.ComputeSignatureError);
}
}
}
/**
* XMLParse class
*
* 提供提取消息格式中的密文及生成回覆消息格式的接口.
*/
class XMLParse {
/**
* 提取出xml數據包中的加密消息
* @param xmltext 待提取的xml字符串
* @return 提取出的加密消息字符串
* @throws AesException
*/
public static Object[] extract(String xmltext) throws AesException {
Object[] result = new Object[3];
try {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
dbf.setFeature("http://xml.org/sax/features/external-general-entities", false);
dbf.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
dbf.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
dbf.setXIncludeAware(false);
dbf.setExpandEntityReferences(false);
DocumentBuilder db = dbf.newDocumentBuilder();
StringReader sr = new StringReader(xmltext);
InputSource is = new InputSource(sr);
Document document = db.parse(is);
Element root = document.getDocumentElement();
NodeList nodelist1 = root.getElementsByTagName("Encrypt");
NodeList nodelist2 = root.getElementsByTagName("ToUserName");
result[0] = 0;
result[1] = nodelist1.item(0).getTextContent();
result[2] = nodelist2.item(0).getTextContent();
return result;
} catch (Exception e) {
e.printStackTrace();
throw new AesException(AesException.ParseXmlError);
}
}
/**
* 生成xml消息
* @param encrypt 加密後的消息密文
* @param signature 安全簽名
* @param timestamp 時間戳
* @param nonce 隨機字符串
* @return 生成的xml字符串
*/
public static String generate(String encrypt, String signature, String timestamp, String nonce) {
String format = "<xml>\n" + "<Encrypt><![CDATA[%1$s]]></Encrypt>\n"
+ "<MsgSignature><![CDATA[%2$s]]></MsgSignature>\n"
+ "<TimeStamp>%3$s</TimeStamp>\n" + "<Nonce><![CDATA[%4$s]]></Nonce>\n" + "</xml>";
return String.format(format, encrypt, signature, timestamp, nonce);
}
}
/**
* 提供基於PKCS7算法的加解密接口.
*/
class PKCS7Encoder {
static Charset CHARSET = Charset.forName("utf-8");
static int BLOCK_SIZE = 32;
/**
* 獲得對明文進行補位填充的字節.
*
* @param count 需要進行填充補位操作的明文字節個數
* @return 補齊用的字節數組
*/
static byte[] encode(int count) {
// 計算需要填充的位數
int amountToPad = BLOCK_SIZE - (count % BLOCK_SIZE);
if (amountToPad == 0) {
amountToPad = BLOCK_SIZE;
}
// 獲得補位所用的字符
char padChr = chr(amountToPad);
String tmp = new String();
for (int index = 0; index < amountToPad; index++) {
tmp += padChr;
}
return tmp.getBytes(CHARSET);
}
/**
* 刪除解密後明文的補位字符
*
* @param decrypted 解密後的明文
* @return 刪除補位字符後的明文
*/
static byte[] decode(byte[] decrypted) {
int pad = (int) decrypted[decrypted.length - 1];
if (pad < 1 || pad > 32) {
pad = 0;
}
return Arrays.copyOfRange(decrypted, 0, decrypted.length - pad);
}
/**
* 將數字轉化成ASCII碼對應的字符，用於對明文進行補碼
*
* @param a 需要轉化的數字
* @return 轉化得到的字符
*/
static char chr(int a) {
byte target = (byte) (a & 0xFF);
return (char) target;
}
}
package jc.wx.networkreleasemonitoring.networkreleasemonitoring.utils;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class AddSHA1 {
public static String SHA1(String inStr) {
MessageDigest md = null;
String outStr = null;
try {
md = MessageDigest.getInstance("SHA-1"); //選擇SHA-1，也可以選擇MD5
byte[] digest = md.digest(inStr.getBytes()); //返回的是byet[]，要轉化爲String存儲比較方便
outStr = bytetoString(digest);
}
catch (NoSuchAlgorithmException nsae) {
nsae.printStackTrace();
}
return outStr;
}
public static String bytetoString(byte[] digest) {
String str = "";
String tempStr = "";
for (int i = 0; i < digest.length; i++) {
tempStr = (Integer.toHexString(digest[i] & 0xff));
if (tempStr.length() == 1) {
str = str + "0" + tempStr;
}
else {
str = str + tempStr;
}
}
return str.toLowerCase();
}
}
package jc.wx.networkreleasemonitoring.networkreleasemonitoring.utils;
@SuppressWarnings("serial")
public class AesException extends Exception {
public final static int OK = 0;
public final static int ValidateSignatureError = -40001;
public final static int ParseXmlError = -40002;
public final static int ComputeSignatureError = -40003;
public final static int IllegalAesKey = -40004;
public final static int ValidateAppidError = -40005;
public final static int EncryptAESError = -40006;
public final static int DecryptAESError = -40007;
public final static int IllegalBuffer = -40008;
//public final static int EncodeBase64Error = -40009;
//public final static int DecodeBase64Error = -40010;
//public final static int GenReturnXmlError = -40011;
private int code;
private static String getMessage(int code) {
switch (code) {
case ValidateSignatureError:
return "簽名驗證錯誤";
case ParseXmlError:
return "xml解析失敗";
case ComputeSignatureError:
return "sha加密生成簽名失敗";
case IllegalAesKey:
return "SymmetricKey非法";
case ValidateAppidError:
return "appid校驗失敗";
case EncryptAESError:
return "aes加密失敗";
case DecryptAESError:
return "aes解密失敗";
case IllegalBuffer:
return "解密後得到的buffer非法";
// case EncodeBase64Error:
// return "base64加密錯誤";
// case DecodeBase64Error:
// return "base64解密錯誤";
// case GenReturnXmlError:
// return "xml生成失敗";
default:
return null; // cannot be
}
}
public int getCode() {
return code;
}
AesException(int code) {
super(getMessage(code));
this.code = code;
}
}
xml轉map:
package jc.wx.networkreleasemonitoring.networkreleasemonitoring.utils;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
/**
* 處理xml
*/
public class XmlUtil {
/**
* xml 轉 map
* @param strXML xml
* @return
* @throws Exception
*/
public static Map<String, String> xmlToMap(String strXML) {
try {
Map<String, String> data = new HashMap<String, String>();
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
InputStream stream = new ByteArrayInputStream(strXML.getBytes("UTF-8"));
org.w3c.dom.Document doc = documentBuilder.parse(stream);
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getDocumentElement().getChildNodes();
for (int idx = 0; idx < nodeList.getLength(); ++idx) {
Node node = nodeList.item(idx);
if (node.getNodeType() == Node.ELEMENT_NODE) {
org.w3c.dom.Element element = (org.w3c.dom.Element) node;
data.put(element.getNodeName(), element.getTextContent());
}
}
try {
stream.close();
} catch (Exception ex) {
// do nothing
}
return data;
} catch (Exception ex) {
System.out.println("無效的XML，不能轉換爲MAP。錯誤消息：" + ex.getMessage() + "。XML內容：" + strXML);
}
return null;
}
}
最後祝大家好運