java微信公众平台后台接入 java版微信公众平台后台接入

package com.dqiang.demo;
 
public class SHA1 {
 private final int[] abcde = { 0x67452301, 0xefcdab89, 0x98badcfe,
  0x10325476, 0xc3d2e1f0 };
 // 摘要数据存储数组
 private int[] digestInt = new int[5];
 // 计算过程中的临时数据存储数组
 private int[] tmpData = new int[80];
 
 // 计算sha-1摘要
 private int process_input_bytes(byte[] bytedata) {
 // 初试化常量
 System.arraycopy(abcde, 0, digestInt, 0, abcde.length);
 // 格式化输入字节数组，补10及长度数据
 byte[] newbyte = byteArrayFormatData(bytedata);
 // 获取数据摘要计算的数据单元个数
 int MCount = newbyte.length / 64;
 // 循环对每个数据单元进行摘要计算
 for (int pos = 0; pos < MCount; pos++) {
  // 将每个单元的数据转换成16个整型数据，并保存到tmpData的前16个数组元素中
  for (int j = 0; j < 16; j++) {
  tmpData[j] = byteArrayToInt(newbyte, (pos * 64) + (j * 4));
  }
  // 摘要计算函数
  encrypt();
 }
 return 20;
 }
 
 // 格式化输入字节数组格式
 private byte[] byteArrayFormatData(byte[] bytedata) {
 // 补0数量
 int zeros = 0;
 // 补位后总位数
 int size = 0;
 // 原始数据长度
 int n = bytedata.length;
 // 模64后的剩余位数
 int m = n % 64;
 // 计算添加0的个数以及添加10后的总长度
 if (m < 56) {
  zeros = 55 - m;
  size = n - m + 64;
 } else if (m == 56) {
  zeros = 63;
  size = n + 8 + 64;
 } else {
  zeros = 63 - m + 56;
  size = (n + 64) - m + 64;
 }
 // 补位后生成的新数组内容
 byte[] newbyte = new byte[size];
 // 复制数组的前面部分
 System.arraycopy(bytedata, 0, newbyte, 0, n);
 // 获得数组Append数据元素的位置
 int l = n;
 // 补1操作
 newbyte[l++] = (byte) 0x80;
 // 补0操作
 for (int i = 0; i < zeros; i++) {
  newbyte[l++] = (byte) 0x00;
 }
 // 计算数据长度，补数据长度位共8字节，长整型
 long N = (long) n * 8;
 byte h8 = (byte) (N & 0xFF);
 byte h7 = (byte) ((N >> 8) & 0xFF);
 byte h6 = (byte) ((N >> 16) & 0xFF);
 byte h5 = (byte) ((N >> 24) & 0xFF);
 byte h4 = (byte) ((N >> 32) & 0xFF);
 byte h3 = (byte) ((N >> 40) & 0xFF);
 byte h2 = (byte) ((N >> 48) & 0xFF);
 byte h1 = (byte) (N >> 56);
 newbyte[l++] = h1;
 newbyte[l++] = h2;
 newbyte[l++] = h3;
 newbyte[l++] = h4;
 newbyte[l++] = h5;
 newbyte[l++] = h6;
 newbyte[l++] = h7;
 newbyte[l++] = h8;
 return newbyte;
 }
 
 private int f1(int x, int y, int z) {
 return (x & y) | (~x & z);
 }
 
 private int f2(int x, int y, int z) {
 return x ^ y ^ z;
 }
 
 private int f3(int x, int y, int z) {
 return (x & y) | (x & z) | (y & z);
 }
 
 private int f4(int x, int y) {
 return (x << y) | x >>> (32 - y);
 }
 
 // 单元摘要计算函数
 private void encrypt() {
 for (int i = 16; i <= 79; i++) {
  tmpData[i] = f4(tmpData[i - 3] ^ tmpData[i - 8] ^ tmpData[i - 14]
   ^ tmpData[i - 16], 1);
 }
 int[] tmpabcde = new int[5];
 for (int i1 = 0; i1 < tmpabcde.length; i1++) {
  tmpabcde[i1] = digestInt[i1];
 }
 for (int j = 0; j <= 19; j++) {
  int tmp = f4(tmpabcde[0], 5)
   + f1(tmpabcde[1], tmpabcde[2], tmpabcde[3]) + tmpabcde[4]
   + tmpData[j] + 0x5a827999;
  tmpabcde[4] = tmpabcde[3];
  tmpabcde[3] = tmpabcde[2];
  tmpabcde[2] = f4(tmpabcde[1], 30);
  tmpabcde[1] = tmpabcde[0];
  tmpabcde[0] = tmp;
 }
 for (int k = 20; k <= 39; k++) {
  int tmp = f4(tmpabcde[0], 5)
   + f2(tmpabcde[1], tmpabcde[2], tmpabcde[3]) + tmpabcde[4]
   + tmpData[k] + 0x6ed9eba1;
  tmpabcde[4] = tmpabcde[3];
  tmpabcde[3] = tmpabcde[2];
  tmpabcde[2] = f4(tmpabcde[1], 30);
  tmpabcde[1] = tmpabcde[0];
  tmpabcde[0] = tmp;
 }
 for (int l = 40; l <= 59; l++) {
  int tmp = f4(tmpabcde[0], 5)
   + f3(tmpabcde[1], tmpabcde[2], tmpabcde[3]) + tmpabcde[4]
   + tmpData[l] + 0x8f1bbcdc;
  tmpabcde[4] = tmpabcde[3];
  tmpabcde[3] = tmpabcde[2];
  tmpabcde[2] = f4(tmpabcde[1], 30);
  tmpabcde[1] = tmpabcde[0];
  tmpabcde[0] = tmp;
 }
 for (int m = 60; m <= 79; m++) {
  int tmp = f4(tmpabcde[0], 5)
   + f2(tmpabcde[1], tmpabcde[2], tmpabcde[3]) + tmpabcde[4]
   + tmpData[m] + 0xca62c1d6;
  tmpabcde[4] = tmpabcde[3];
  tmpabcde[3] = tmpabcde[2];
  tmpabcde[2] = f4(tmpabcde[1], 30);
  tmpabcde[1] = tmpabcde[0];
  tmpabcde[0] = tmp;
 }
 for (int i2 = 0; i2 < tmpabcde.length; i2++) {
  digestInt[i2] = digestInt[i2] + tmpabcde[i2];
 }
 for (int n = 0; n < tmpData.length; n++) {
  tmpData[n] = 0;
 }
 }
 
 // 4字节数组转换为整数
 private int byteArrayToInt(byte[] bytedata, int i) {
 return ((bytedata[i] & 0xff) << 24) | ((bytedata[i + 1] & 0xff) << 16)
  | ((bytedata[i + 2] & 0xff) << 8) | (bytedata[i + 3] & 0xff);
 }
 
 // 整数转换为4字节数组
 private void intToByteArray(int intValue, byte[] byteData, int i) {
 byteData[i] = (byte) (intValue >>> 24);
 byteData[i + 1] = (byte) (intValue >>> 16);
 byteData[i + 2] = (byte) (intValue >>> 8);
 byteData[i + 3] = (byte) intValue;
 }
 
 // 将字节转换为十六进制字符串
 private static String byteToHexString(byte ib) {
 char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A',
  'B', 'C', 'D', 'E', 'F' };
 char[] ob = new char[2];
 ob[0] = Digit[(ib >>> 4) & 0X0F];
 ob[1] = Digit[ib & 0X0F];
 String s = new String(ob);
 return s;
 }
 
 // 将字节数组转换为十六进制字符串
 private static String byteArrayToHexString(byte[] bytearray) {
 String strDigest = "";
 for (int i = 0; i < bytearray.length; i++) {
  strDigest += byteToHexString(bytearray[i]);
 }
 return strDigest;
 }
 
 // 计算sha-1摘要，返回相应的字节数组
 public byte[] getDigestOfBytes(byte[] byteData) {
 process_input_bytes(byteData);
 byte[] digest = new byte[20];
 for (int i = 0; i < digestInt.length; i++) {
  intToByteArray(digestInt[i], digest, i * 4);
 }
 return digest;
 }
 
 // 计算sha-1摘要，返回相应的十六进制字符串
 public String getDigestOfString(byte[] byteData) {
 return byteArrayToHexString(getDigestOfBytes(byteData));
 }
 
 public static void main(String[] args) {
 String data = "tokenDemo";
 System.out.println(data);
 String digest = new SHA1().getDigestOfString(data.getBytes());
 System.out.println(digest);
 }
}

package com.dqiang.demo;
 
import java.io.IOException;
import java.util.Arrays;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
/**
 * @author StemQ
 * @version v1.0
 * Blog:http://blog.csdn.net/stemq
 * Web:www.dqiang.com
 */
public class weChatJavaTokenValidate extends HttpServlet {
 
 private static final long serialVersionUID = -6761982938477193120L;
  /* 例如
   * URL(服务器地址) http://weixin.xxxx.com/weChatJavaTokenValidate/wechatToken
   * Token(令牌) tokenChat
   * */
  private String TOKEN = "tokenChat"; //根据实际情况自己定义token与基本配置/填写服务器配置Token(令牌)相同
 @Override
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 // 微信加密签名
 String signature = request.getParameter("signature");
 // 随机字符串
 String echostr = request.getParameter("echostr");
 // 时间戳
 String timestamp = request.getParameter("timestamp");
 // 随机数
 String nonce = request.getParameter("nonce");
 
 String[] str = { TOKEN, timestamp, nonce };
 // 字典序排序
 Arrays.sort(str); 
 String bigStr = str[0] + str[1] + str[2];
 // SHA1加密
 String digest = new SHA1().getDigestOfString(bigStr.getBytes()).toLowerCase();
 // 确认请求来至微信
 if (digest.equals(signature)) {
  response.getWriter().print(echostr);
 }
 }
 
}