进入微信公众平台地址
进入基本配置
这里需要填写的有服务器的URL、Token两个地方
是一个公网地址,只能接收80端口的(http默认端口)
http://公网地址/项目名称/请求路径
在校验的时候需要用到,随便输入一个字符串就可以了
开发者提交信息后,微信服务器将发送GET请求到填写的服务器地址URL上,GET请求携带四个参数
参数 描述
signature 微信加密签名,signature结合了开发者填写的token参数和请求中的timestamp参数、nonce参数。
timestamp 时间戳
nonce 随机数
echostr 随机字符串
所以需要编写相应的Controller(采用Spring MVC)
/** * 验证微信服务器 * * @param response * @param signature * @param timestamp * @param nonce * @param echostr */
@RequestMapping(value = "/wechat", method = RequestMethod.GET)
public void wechatService(PrintWriter out, HttpServletResponse response,
@RequestParam(value = "signature", required = false) String signature, @RequestParam String timestamp,
@RequestParam String nonce, @RequestParam String echostr) {
if (CheckUtil.checkSignature(signature, timestamp, nonce)) {
out.print(echostr);
}
}
CheckUtil.java
package com.wechat.utils;
import java.util.Arrays;
/** * * 校验工具类 * 开发者通过检验signature对请求进行校验(下面有校验方式)。若确认此次GET请求来自微信服务器,请原样返回echostr参数内容,则接入生效, * 成为开发者成功,否则接入失败。 * * @author GWCheng * */
public class CheckUtil {
//配置微信公众号时填写的Token
private static final String token = "chenggaowei";
public static boolean checkSignature(String signature, String timestamp, String nonce) {
// 拼接字符串
String[] arr = new String[] { token, timestamp, nonce };
// 排序
Arrays.sort(arr);
// 生成字符串
StringBuffer content = new StringBuffer();
for (int i = 0; i < arr.length; i++) {
content.append(arr[i]);
}
// SHA1加密
String tmp = DecriptUtil.SHA1(content.toString());
return tmp.equals(signature);
}
}
DecriptUtil.java
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
/** * 各种加密解密 * */
public class DecriptUtil {
public static String SHA1(String decript) {
try {
MessageDigest digest = java.security.MessageDigest
.getInstance("SHA-1");
digest.update(decript.getBytes());
byte messageDigest[] = digest.digest();
// Create Hex String
StringBuffer hexString = new StringBuffer();
// 字节数组转换为 十六进制 数
for (int i = 0; i < messageDigest.length; i++) {
String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
if (shaHex.length() < 2) {
hexString.append(0);
}
hexString.append(shaHex);
}
return hexString.toString();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return "";
}
public static String SHA(String decript) {
try {
MessageDigest digest = java.security.MessageDigest
.getInstance("SHA");
digest.update(decript.getBytes());
byte messageDigest[] = digest.digest();
// Create Hex String
StringBuffer hexString = new StringBuffer();
// 字节数组转换为 十六进制 数
for (int i = 0; i < messageDigest.length; i++) {
String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
if (shaHex.length() < 2) {
hexString.append(0);
}
hexString.append(shaHex);
}
return hexString.toString();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return "";
}
public static String MD5(String input) {
try {
// 获得MD5摘要算法的 MessageDigest 对象
MessageDigest mdInst = MessageDigest.getInstance("MD5");
// 使用指定的字节更新摘要
mdInst.update(input.getBytes());
// 获得密文
byte[] md = mdInst.digest();
// 把密文转换成十六进制的字符串形式
StringBuffer hexString = new StringBuffer();
// 字节数组转换为 十六进制 数
for (int i = 0; i < md.length; i++) {
String shaHex = Integer.toHexString(md[i] & 0xFF);
if (shaHex.length() < 2) {
hexString.append(0);
}
hexString.append(shaHex);
}
return hexString.toString();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return "";
}
/** * 加密 * * @param content * 需要加密的内容 * @param password * 加密密码 * @return */
public static byte[] encryptAES(String content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128, new SecureRandom(password.getBytes()));
SecretKey secretKey = kgen.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES");// 创建密码器
byte[] byteContent = content.getBytes("utf-8");
cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
byte[] result = cipher.doFinal(byteContent);
return result; // 加密
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
return null;
}
/** * 解密 * * @param content * 待解密内容 * @param password * 解密密钥 * @return */
public static byte[] decryptAES(byte[] content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128, new SecureRandom(password.getBytes()));
SecretKey secretKey = kgen.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES");// 创建密码器
cipher.init(Cipher.DECRYPT_MODE, key);// 初始化
byte[] result = cipher.doFinal(content);
return result; // 加密
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
return null;
}
/** * BASE64解密 * * @param key * @return * @throws Exception */
public static String decryptBASE64(String key) {
return "";
}
/** * BASE64加密 * * @param key * @return * @throws Exception */
public static String encryptBASE64(String key) {
return "";
}
}
验证写好了就可以点击提交了
配置成功之后会有如下的提示信息
下面是微信发过来的四个参数,以及给微信回复的echostr
至此开发环境已经配置好了!
环境配置好之后就可以开发了
微信会将发往公众账号的消息发到我们配置的URL中,以POST的方式
当普通微信用户向公众账号发消息时,微信服务器将POST消息的XML数据包到开发者填写的URL上。
以下是debug的信息
微信已经将发往公众账号的消息发到了我们配置的服务器地址
xml消息不太利于编写程序,所以需要对xml消息进行相应的转换,这里将其转会为map
/** * 将xml转化为Map集合 * * @param request * @return */
public static Map<String, String> xmlToMap(HttpServletRequest request) {
Map<String, String> map = new HashMap<String, String>();
SAXReader reader = new SAXReader();
InputStream ins = null;
try {
ins = request.getInputStream();
} catch (IOException e1) {
e1.printStackTrace();
}
Document doc = null;
try {
doc = reader.read(ins);
} catch (DocumentException e1) {
e1.printStackTrace();
}
Element root = doc.getRootElement();
@SuppressWarnings("unchecked")
List<Element> list = root.elements();
for (Element e : list) {
map.put(e.getName(), e.getText());
}
try {
ins.close();
} catch (IOException e1) {
e1.printStackTrace();
}
return map;
}
用到的jar包
dom4j.jar
这个方法写好之后就可以调用了:
Controller如下,微信发过来的消息用POST接收
/** * 接收来自微信发来的消息 * * @param out * @param request * @param response */
@ResponseBody
@RequestMapping(value = "/wechat", method = RequestMethod.POST)
public void wechatServicePost(PrintWriter out, HttpServletRequest request, HttpServletResponse response) {
String responseMessage = wechatService.processRequest(request);
out.print(responseMessage);
out.flush();
}
Controller调用Service的方法(给用户返回消息,也是一个xml格式的字符串)
Service关键代码如下
@Service
public class WechatService {
private static Logger log = Logger.getLogger(WechatService.class);
public String processRequest(HttpServletRequest request) {
Map<String, String> map = WechatMessageUtil.xmlToMap(request);
log.info(map);
// 发送方帐号(一个OpenID)
String fromUserName = map.get("FromUserName");
// 开发者微信号
String toUserName = map.get("ToUserName");
// 消息类型
String msgType = map.get("MsgType");
// 默认回复一个"success"
String responseMessage = "success";
// 对消息进行处理
if (WechatMessageUtil.MESSAGE_TEXT.equals(msgType)) {// 文本消息
TextMessage textMessage = new TextMessage();
textMessage.setMsgType(WechatMessageUtil.MESSAGE_TEXT);
textMessage.setToUserName(fromUserName);
textMessage.setFromUserName(toUserName);
textMessage.setCreateTime(System.currentTimeMillis());
textMessage.setContent("我已经受到你发来的消息了");
responseMessage = WechatMessageUtil.textMessageToXml(textMessage);
}
log.info(responseMessage);
return responseMessage;
}
}
Servie调用WechatMessageUtil将reques中的xml转换为map
WechatMessageUtil.java如下
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import com.thoughtworks.xstream.XStream;
import com.wechat.entity.vo.wechat.message.TextMessage;
public class WechatMessageUtil {
// 各种消息类型,除了扫带二维码事件
/** * 文本消息 */
public static final String MESSAGE_TEXT = "text";
/** * 图片消息 */
public static final String MESSAtGE_IMAGE = "image";
/** * 图文消息 */
public static final String MESSAGE_NEWS = "news";
/** * 语音消息 */
public static final String MESSAGE_VOICE = "voice";
/** * 视频消息 */
public static final String MESSAGE_VIDEO = "video";
/** * 小视频消息 */
public static final String MESSAGE_SHORTVIDEO = "shortvideo";
/** * 地理位置消息 */
public static final String MESSAGE_LOCATION = "location";
/** * 链接消息 */
public static final String MESSAGE_LINK = "link";
/** * 事件推送消息 */
public static final String MESSAGE_EVENT = "event";
/** * 事件推送消息中,事件类型,subscribe(订阅) */
public static final String MESSAGE_EVENT_SUBSCRIBE = "subscribe";
/** * 事件推送消息中,事件类型,unsubscribe(取消订阅) */
public static final String MESSAGE_EVENT_UNSUBSCRIBE = "unsubscribe";
/** * 事件推送消息中,上报地理位置事件 */
public static final String MESSAGE_EVENT_LOCATION_UP = "LOCATION";
/** * 事件推送消息中,自定义菜单事件,点击菜单拉取消息时的事件推送 */
public static final String MESSAGE_EVENT_CLICK = "CLICK";
/** * 事件推送消息中,自定义菜单事件,点击菜单跳转链接时的事件推送 */
public static final String MESSAGE_EVENT_VIEW = "VIEW";
/** * 将xml转化为Map集合 * * @param request * @return */
public static Map<String, String> xmlToMap(HttpServletRequest request) {
Map<String, String> map = new HashMap<String, String>();
SAXReader reader = new SAXReader();
InputStream ins = null;
try {
ins = request.getInputStream();
} catch (IOException e1) {
e1.printStackTrace();
}
Document doc = null;
try {
doc = reader.read(ins);
} catch (DocumentException e1) {
e1.printStackTrace();
}
Element root = doc.getRootElement();
@SuppressWarnings("unchecked")
List<Element> list = root.elements();
for (Element e : list) {
map.put(e.getName(), e.getText());
}
try {
ins.close();
} catch (IOException e1) {
e1.printStackTrace();
}
return map;
}
/** * 文本消息转化为xml * * @param textMessage * @return */
public static String textMessageToXml(TextMessage textMessage) {
XStream xstream = new XStream();
xstream.alias("xml", textMessage.getClass());
return xstream.toXML(textMessage);
}
}
用到的jar包有
log4j
xstream
xmlpull
用户发来的消息
{MsgId=6241406265466888851, FromUserName=od_Ldw8_rwcGiFsaCeF74Vsc-qz4, CreateTime=1453190638, Content=你好, ToUserName=gh_8f6a0cd44617, MsgType=text}
给用户回复的消息
<xml>
<ToUserName>od_Ldw8_rwcGiFsaCeF74Vsc-qz4</ToUserName>
<FromUserName>gh_8f6a0cd44617</FromUserName>
<CreateTime>1453190640848</CreateTime>
<MsgType>text</MsgType>
<Content>我已经受到你发来的消息了</Content>
</xml>
如图所示
完整项目下载地址
https://github.com/peer44/testwechat
这个地址中的内容在更新,如果觉得有帮助,希望能关注我的动态
参考文献
微信开发者文档