Springmvc 微信开发者模式对接

1.Action 层代码

package com.aiait.wechat.action;

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

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

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

import com.aiait.framework.util.Sign;
import com.aiait.framework.util.WeChatSignUtil;

@Controller
@RequestMapping(value = "/wxjs")
public class WxJSTestAction extends BaseAction{

@RequestMapping(value = "/doValidateFromWeChat")
public void doValidateFromWeChat(HttpServletRequest request,
HttpServletResponse response) throws IOException {

// 微信加密签名
String signature = request.getParameter("signature");
// 时间戳
String timestamp = request.getParameter("timestamp");
// 随机数
String nonce = request.getParameter("nonce");
// 随机字符串
String echostr = request.getParameter("echostr");

System.out.println("signature..." + signature);
System.out.println("timestamp..." + timestamp);
System.out.println("nonce..." + nonce);
System.out.println("echostr..." + echostr);

PrintWriter out = response.getWriter();

if(WeChatSignUtil.checkSignature(signature, timestamp, nonce)) {
System.out.println("true..." + echostr);
out.print(echostr); //返回echostr
}
out.close();
out = null;
}

}
2. SignUtil 加密工具代码
package com.aiait.framework.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class WeChatSignUtil {
// 与接口配置信息中的Token要一致
private static String token = "eric1991";

/**
* 验证签名
*
* @param signature
* @param timestamp
* @param nonce
* @return
*/
public static boolean checkSignature(String signature, String timestamp,
String nonce) {
String[] arr = new String[] { token, timestamp, nonce };
// 将token、timestamp、nonce三个参数进行字典序排序
//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");
// 将三个参数字符串拼接成一个字符串进行sha1加密
byte[] digest = md.digest(content.toString().getBytes());
tmpStr = byteToStr(digest);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}

content = null;
// 将sha1加密后的字符串可与signature对比，标识该请求来源于微信
return tmpStr != null ? tmpStr.equals(signature.toUpperCase()) : false;
}

/**
* 将字节数组转换为十六进制字符串
*
* @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;
}

/**
* 将字节转换为十六进制字符串
*
* @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;
}
}
}
}
}


3. 配置微信公众平台后台的参数，包括token等信息