微信公众开放平台开发07---java servlet 实现微信开发第一步:微信服务器验证

微信公众开放平台开发07---java servlet 实现微信开发第一步:微信服务器验证
 技术qq交流群：JavaDream：251572072
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1.不说没用的,直接看工程吧
2.创建web应用ROOT
3.文件结构:
/ROOT/src/credream/utils/SHA1.java
/ROOT/src/credream/utils/WechatCallbackApi.java
/ROOT/src/credream/weixin/weixinUtil.java
/ROOT/WebRoot/WEB-INF/web.xml
4./ROOT/src/credream/utils/SHA1.java加密用的
package credream.utils;


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 = "123456";
System.out.println(data);
String digest = new SHA1().getDigestOfString(data.getBytes());
System.out.println(digest);


// System.out.println( ToMD5.convertSHA1(data).toUpperCase());
}
}
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2./ROOT/src/credream/utils/WechatCallbackApi.java这个文件就是进行微信服务器验证的
package credream.utils;
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;


import credream.utils.SHA1;


@SuppressWarnings("serial")
public class WechatCallbackApi extends HttpServlet {
// 自定义token
private String TOKEN = "845C2550903CE6FA54CACDB82EAD4350";


public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 微信加密签名
String signature = request.getParameter("signature");
// 随机字符
String echostr = request.getParameter("echostr");
// 时间
String timestamp = request.getParameter("timestamp");
// 随机
String nonce = request.getParameter("nonce");


String[] str = { TOKEN, timestamp, nonce };
Arrays.sort(str); // 字典序排
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);
}
}
}
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3./ROOT/src/credream/weixin/weixinUtil.java这个文件和上面那个是一样的...注意千万不要再中间进行内容的输出
  比如:在中间有这样的语句:
response.getWriter().print("这个样子是错的..亲...");
微信只会根据加密后的字符串和发送的signature,进行比较来确认url的合法性
package credream.weixin;


import java.io.IOException;
import java.io.PrintWriter;
import java.util.Arrays;


import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


import credream.utils.SHA1;


@SuppressWarnings("serial")
public class weixinUtil extends HttpServlet {
   // 自定义 token
   private String TOKEN = "weixinxiaowei";


   public void doGet(HttpServletRequest request, HttpServletResponse response)
           throws ServletException, IOException {
   //PrintWriter out=response.getWriter();
   //response.setCharacterEncoding("");
   //response .getWriter().print("heihei");
   
       // 微信加密签名
       String signature = request.getParameter("signature");
       //out.println("微信加密签名"+signature);
       // 随机字符串
       String echostr = request.getParameter("echostr");
      // out.println("随机字符串"+echostr);
       // 时间戳
       String timestamp = request.getParameter("timestamp");
      // out.println("时间戳"+timestamp);
       // 随机数
       String nonce = request.getParameter("nonce");
       //out.println("随机数"+nonce);


       String[] str = { TOKEN, timestamp, nonce };
       Arrays.sort(str); // 字典序排序
       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);
         //response.getWriter().print("hello lidewei");
 //可以看到输出的语句都被注释掉了...
       }
   }
}
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/ROOT/WebRoot/WEB-INF/web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <servlet>
  <servlet-name>weixinServlet</servlet-name>
  <servlet-class>credream.weixin.weixinUtil</servlet-class>
  </servlet>
  <servlet-mapping>
  <servlet-name>weixinServlet</servlet-name>
  <url-pattern>/weixintest</url-pattern>
  </servlet-mapping>
 
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  
</web-app>