近期突然對微信公衆號開發有點感興趣，參考了CSDN博客，我便開始搭建java web項目，發佈項目需要主機，在網上搜索了一番，因爲只是臨時測試使用，免費的原因選擇了新浪雲應用，結果發現各種坑
開發工具：Eclipse Java EE IDE for Web Developers. Mars Release (4.5.0)
1. 創建Maven項目 選擇webapp類型 過程略過，如果不懂maven，自行補習maven知識
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ljg</groupId>
<artifactId>weixin_server</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>weixin_server Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>weixin_server</finalName>
</build>
</project>上面就是普通的maven web項目的pom，無任何特別之處
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>Archetype Created Web Application</display-name>
<servlet>
<servlet-name>CrazyServlet</servlet-name>
<servlet-class>
com.ljg.weixin.servlet.CrazyServlet
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>CrazyServlet</servlet-name>
<url-pattern>/Javen</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
新建servlet
package com.ljg.weixin.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.ljg.weixin.util.SignUtil;
/**
* 核心請求處理類
* @author 簡愛微萌
* @Email [email protected]
*
*/
public class CrazyServlet extends HttpServlet {
private static final long serialVersionUID = -5021188348833856475L;
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
// 微信加密簽名
String signature = request.getParameter("signature");
// 時間戳
String timestamp = request.getParameter("timestamp");
// 隨機數
String nonce = request.getParameter("nonce");
// 隨機字符串
String echostr = request.getParameter("echostr");
PrintWriter out = response.getWriter();
// 通過檢驗signature對請求進行校驗，若校驗成功則原樣返回echostr，表示接入成功，否則接入失敗
if (SignUtil.checkSignature(signature, timestamp, nonce)) {
out.print(echostr);
}
out.close();
out = null;
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// TODO 消息的接收、處理、響應
}
}package com.ljg.weixin.util;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
/**
* 請求校驗工具類
*
* @author 簡愛微萌
* @Email [email protected]
*
*/
public class SignUtil {
// 與接口配置信息中的Token要一致
private static String token = "Javen";
/**
* 驗證簽名
*
* @param signature
* @param timestamp
* @param nonce
* @return
*/
public static boolean checkSignature(String signature, String timestamp,
String nonce) {
String[] arr = new String[] { token, timestamp, nonce };
// 將token、timestamp、nonce三個參數進行字典序排序
//Arrays.sort(arr);
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");
// 將三個參數字符串拼接成一個字符串進行sha1加密
byte[] digest = md.digest(content.toString().getBytes());
tmpStr = byteToStr(digest);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
System.out.println(tmpStr);
content = null;
// 將sha1加密後的字符串可與signature對比，標識該請求來源於微信
return tmpStr != null ? tmpStr.equals(signature.toUpperCase()) : false;
}
/**
* 將字節數組轉換爲十六進制字符串
*
* @param byteArray
* @return
*/
private static String byteToStr(byte[] byteArray) {
String strDigest = "";
for (int i = 0; i < byteArray.length; i++) {
strDigest += byteToHexStr(byteArray[i]);
}
return strDigest;
}
/**
* 將字節轉換爲十六進制字符串
*
* @param mByte
* @return
*/
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;
}
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;
}
}
}
}
public static void main(String[] args) {
boolean checkSignature = checkSignature("3EA0FC1149E97F47A2FE9FEB5E79E308F4ED864A", "1393224944", "1392553418");
System.out.println(checkSignature);
}
}打包成war，上傳。
這時要把javax.servlet-api-3.1.0.jar去掉！！！如果不小心忘記去掉了，那麼後果是這樣的：
去掉之後，上傳再訪問： http://1.xxxx.applinzi.com/Javen?signature=3EA0FC1149E97F47A2FE9FEB5E79E308F4ED864A&echostr=helloworld×tamp=1393224944&nonce=1392553418(xxxx是新浪雲web應用名稱)
頁面顯示
helloworld
5、微信測試。
此步暫時還沒做