JAVA H5微信分享

一、前台代码：

<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<script type="text/javascript">
$(function(){
var str = $(window).height();
$('#btn').css("margin-top",str*0.58);
$('#Layer1').css("margin-top",str*0.06);
})


wx.config({
// debug: true, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
appId: '${map.appId}', // 必填，公众号的唯一标识
timestamp: '${map.timestamp}', // 必填，生成签名的时间戳
nonceStr: '${map.nonceStr}', // 必填，生成签名的随机串
signature: '${map.signature}',// 必填，签名，见附录1
jsApiList: [
'onMenuShareAppMessage'
] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
});

wx.ready(function(){

var sdata = {
title: '下载xxapp',
desc: '移动xxAPP上线拉快来下载呀！！',
link: 'http://www.xx.com/operation/mybusi/barcode',
imgUrl: 'http://www.xx.com/images/h5/microcode/60.png',
success: function () {
// alert('用户确认分享后执行的回调函数');
},
cancel: function () {
// alert('用户取消分享后执行的回调函数');
}
};

// config信息验证后会执行ready方法，所有接口调用都必须在config接口获得结果之后，config是一个客户端的异步操作，所以如果需要在页面加载时就调用相关接口，则须把相关接口放在ready函数中调用来确保正确执行。对于用户触发时才调用的接口，则可以直接调用，不需要放在ready函数中。
wx.onMenuShareAppMessage(sdata);
});

</script>

二、java后台代码：

package com.unionpay.acp.sdk;

import java.util.UUID;
import java.util.Map;
import java.util.HashMap;
import java.util.Formatter;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.io.UnsupportedEncodingException;

import net.sf.json.JSONObject;

import com.xx.common.config.Global;
import com.unionpay.acp.sdk.HttpClient;

/**
* 微信分享签名
*
*/
public class Sign {
public static void main(String[] args) {
// String jsapi_ticket = "kgt8ON7yVITDhtdwci0qecRXz9HyXuyXgIslzmd3ri0s5EnLrVZZfrPJotRfKWQ-TTuQ2ZMAK86GUlWF1PHhcg";
};

public static Map<String, String> getResult(){

// String jsapi_ticket = getTicket();
// 注意 URL 一定要动态获取，不能 hardcode
String url = "http://www.xx.com/operation/mybusi/barcode";
// String url = Global.getConfig("wx.shareUrl");
Map<String, String> ret = sign(getTicket(), url);
ret.put("appId", getAppId());
return ret;
}

private static String getAppId(){
return Global.getConfig("wx.appid");
}

private static String getToken(){

String accessToken = "";
String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+getAppId()+"&secret="+Global.getConfig("wx.secret");
HttpClient hc = new HttpClient(url, 30000, 30000);
try {
int status = hc.sendGet("utf-8");
if (200 == status) {
String resultString = hc.getResult();
if (null != resultString && !"".equals(resultString)) {
JSONObject json = JSONObject.fromObject(resultString);
if (null==json.get("errcode")){
accessToken = json.get("access_token").toString();
} else {
System.out.println(resultString);
}
}
}else{
System.out.println("返回http状态码["+status+"]，请检查请求报文或者请求地址是否正确");
}
} catch (Exception e) {
e.printStackTrace();
}
return accessToken;
}

private static String getTicket(){

String ticket = "";
String url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token="+getToken()+"&type=jsapi";
HttpClient hc = new HttpClient(url, 30000, 30000);
try {
int status = hc.sendGet("utf-8");
if (200 == status) {
String resultString = hc.getResult();
if (null != resultString && !"".equals(resultString)) {

JSONObject json = JSONObject.fromObject(resultString);
if ("0".equals(json.getString("errcode"))){
ticket = json.getString("ticket");
} else {
System.out.println(resultString);
}
}
}else{
System.out.println("返回http状态码["+status+"]，请检查请求报文或者请求地址是否正确");
}
} catch (Exception e) {
e.printStackTrace();
}
return ticket;
}

public static Map<String, String> sign(String jsapi_ticket, String url) {
Map<String, String> ret = new HashMap<String, String>();
String nonce_str = create_nonce_str();
String timestamp = create_timestamp();
String string1;
String signature = "";

//注意这里参数名必须全部小写，且必须有序
string1 = "jsapi_ticket=" + jsapi_ticket +
"&noncestr=" + nonce_str +
"&timestamp=" + timestamp +
"&url=" + url;
System.out.println(string1);

try
{
MessageDigest crypt = MessageDigest.getInstance("SHA-1");
crypt.reset();
crypt.update(string1.getBytes("UTF-8"));
signature = byteToHex(crypt.digest());
}
catch (NoSuchAlgorithmException e)
{
e.printStackTrace();
}
catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}

ret.put("url", url);
ret.put("jsapi_ticket", jsapi_ticket);
ret.put("nonceStr", nonce_str);
ret.put("timestamp", timestamp);
ret.put("signature", signature);

return ret;
}

private static String byteToHex(final byte[] hash) {
Formatter formatter = new Formatter();
for (byte b : hash)
{
formatter.format("%02x", b);
}
String result = formatter.toString();
formatter.close();
return result;
}

private static String create_nonce_str() {
return UUID.randomUUID().toString();
}

private static String create_timestamp() {
return Long.toString(System.currentTimeMillis() / 1000);
}
}