微信公众号授权接口验证工具类(明文)

package com.c8SoftWare.shop.util;

import java.security.MessageDigest;

import java.util.Arrays;

import javax.servlet.ServletRequest;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

/***

 * 微信消息接口认证token摘要类

 * 

 * 这个摘要类实现为单例，校验一个签名是否合法的例子如下

 * 

 * <pre>

 * 

 * WeixinMessageDigest wxDigest = WeixinMessageDigest.getInstance();

 * boolean bValid = wxDigest.validate(signature, timestamp, nonce);

 * </pre>

 * 

 * 

 * @author liguocai

 */

public final class WeixinMessageDigest {

/**
* 单例持有类
* 
* @author liguocai
* 
*/
private static class SingletonHolder {
static final WeixinMessageDigest INSTANCE = new WeixinMessageDigest();
}

/**
* 获取单例
* 
* @return
*/
public static WeixinMessageDigest getInstance() {
return SingletonHolder.INSTANCE;
}

private MessageDigest digest;

private WeixinMessageDigest() {
try {
digest = MessageDigest.getInstance("SHA-1");
} catch (Exception e) {
throw new InternalError("init MessageDigest error:" + e.getMessage());
}
}

/**
* 将字节数组转换成16进制字符串
* 
* @param b
* @return
*/
private static String byte2hex(byte[] b) {
StringBuilder sbDes = new StringBuilder();
String tmp = null;
for (int i = 0; i < b.length; i++) {
tmp = (Integer.toHexString(b[i] & 0xFF));
if (tmp.length() == 1) {
sbDes.append("0");
}
sbDes.append(tmp);
}
return sbDes.toString();
}

private String encrypt(String strSrc) {
String strDes = null;
byte[] bt = strSrc.getBytes();
digest.update(bt);
strDes = byte2hex(digest.digest());
return strDes;
}

/**
* 校验请求的签名是否合法
* 
* 加密/校验流程： 1. 将token、timestamp、nonce三个参数进行字典序排序 2. 将三个参数字符串拼接成一个字符串进行sha1加密
* 3. 开发者获得加密后的字符串可与signature对比，标识该请求来源于微信
* 
* @param signature
* @param timestamp
* @param nonce
* @return
*/
public boolean validate(String signature, String timestamp, String nonce, String token) {
// 1. 将token、timestamp、nonce三个参数进行字典序排序
String[] arrTmp = { token, timestamp, nonce };
Arrays.sort(arrTmp);
StringBuffer sb = new StringBuffer();
// 2.将三个参数字符串拼接成一个字符串进行sha1加密
for (int i = 0; i < arrTmp.length; i++) {
sb.append(arrTmp[i]);
}
String expectedSignature = encrypt(sb.toString());
// 3. 开发者获得加密后的字符串可与signature对比，标识该请求来源于微信
if (expectedSignature.equals(signature)) {
return true;
}
return false;
}

public static void main(String[] args) {

String signature = "8dc30c79633581afefbc316ad93d802fdd6f4708";// 加密需要验证的签名
String timestamp = "1478176977";// 时间戳
String nonce = "895301173";// 随机数
String token = "cellcom";

WeixinMessageDigest wxDigest = WeixinMessageDigest.getInstance();
boolean bValid = wxDigest.validate(signature, timestamp, nonce, token);
if (bValid) {
System.out.println("token 验证成功!");
} else {
System.out.println("token 验证失败!");
}
}

@ResponseBody
@RequestMapping(value = "wei_test")
public String tel_getcitylist(ServletRequest request) throws Exception {

String signature = request.getParameter("signature");
String timestamp = request.getParameter("timestamp");
String nonce = request.getParameter("nonce");
String echostr = request.getParameter("echostr");

/**
* 8dc30c79633581afefbc316ad93d802fdd6f4708 
* 1478176977 
* 895301173
* 9192377613597506513
*/
System.err.println("----------------------------");
System.err.println(signature);
System.err.println(timestamp);
System.err.println(nonce);
System.err.println(echostr);
System.err.println("----------------------------");

return echostr;
}

}