直接上代码:
1. 前端调试代码:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>调用微信相机</title>
<link rel="stylesheet" href="css/weui.min.css"/>
</head>
<body>
<br/><br/>
<div>
<div class="hd">
<h1 class="page_title" ><span id="current_user"></span></h1>
</div>
<br/>
<div class="page slideIn button">
<div class="bd spacing">
<br/><br/><br/><br/>
<a class="weui_btn weui_btn_primary" href="javascript:;" onclick="take_a_photo()">调用微信相机</a>
</div>
</div>
</div>
<br/><br/><br/><br/>
<div>
appId:<span id="appId"></span><br/>
timestamp:<span id="timestamp"></span><br/>
nonceStr:<span id="nonceStr"></span><br/>
jsapi_ticket:<span id="jsapi_ticket"></span><br/>
signature:<span id="signature"></span><br/>
originalStr:<span id="originalStr"></span><br/>
scan_result:<span id="result"></span><br/>
</div>
<script type='text/javascript' src='js/jquery.min.js'></script>
<script type="text/javascript" src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<script type="text/javascript" src="js/weixin_util.js"></script>
<script type="text/javascript">
// 通过config接口注入权限验证配置
$(function(){
debugger;
get_wx_config();
})
function get_wx_config(){
debugger;
//url(当前网页的URL,不包含#及其后面部分)
var url = window.location.href.split('#')[0];
var indata = {"url":url};
//$.post("http://wwww.axxx.cn/xxx/weixin/getConfigInfo.json", indata, function(data){
$.post("http://localhost:8080/xxx/weixin/getConfigInfo.json", indata, function(data){
debugger;
if(data.rs == 'f'){
alert("系统错误");
}else{
var result = data.body;
$("#appId").text(result.appId);
$("#timestamp").text(result.timestamp);
$("#nonceStr").text(result.nonceStr);
$("#jsapi_ticket").text(result.jsapi_ticket);
$("#signature").text(result.signature);
$("#originalStr").text(result.originalStr);
//步骤三:通过config接口注入权限验证配置
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: result.appId, // 必填,公众号的唯一标识
timestamp: result.timestamp, // 必填,生成签名的时间戳
nonceStr: result.nonceStr, // 必填,生成签名的随机串
signature: result.signature,// 必填,签名,见附录1
jsApiList: ["chooseImage", "previewImage", "uploadImage", "downloadImage"] // 必填,需要使用的JS接口列表,所有JS接口列表见附录2
// 基本思路是,上传图片到微信服务器->下载多媒体接口讲图片下载到服务器->返回服务器存储路径->前台显示
});
// 步骤四:通过ready接口处理成功验证
wx.ready(function(){
alert("wx.config success.");
});
wx.error(function(res){
alert("wx.config failed.");
//alert(res);
// config信息验证失败会执行error函数,如签名过期导致验证失败,具体错误信息可以打开config的debug模式查看,
// 也可以在返回的res参数中查看,对于SPA可以在这里更新签名。
});
// {"errMsg":"config:invalid signature"}
}
},'json');
}
// 图片接口
// 拍照、本地选图
var images = {
localId: [],
serverId: []
};
// 拍照或者选择照片
function take_a_photo(){
wx.chooseImage({
count: 1, // 默认9,这里每次只处理一张照片
sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图,默认二者都有
sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机,默认二者都有
success: function (res) {
images.localId = res.localIds; // 返回选定照片的本地ID列表,localId可以作为img标签的src属性显示图片
var i = 0, length = images.localId.length;
function upload() {
wx.uploadImage({
localId: images.localId[i],
success: function(res) {
i++;
alert('已上传:' + i + '/' + length);
images.serverId.push(res.serverId);
// res.serverId 就是 media_id,根据它去微信服务器读取图片数据:
var indata = {"media_id":res.serverId};
$.post("/weixin/getPhoto.json", indata, function(data){
if(data.rs == 'f'){
alert("系统错误");
}else{
alert(data.body); // 返回 图片在我们自己的服务器的url
}
},'json');
if (i < length) {
upload();
}
},
fail: function(res) {
alert(JSON.stringify(res));
}
});
}
upload();
}
});
}
</script>
</body>
</html>
前端这里
var url = window.location.href.split('#')[0];
是比较容易犯错的地方。
2. 后端接口:
@NoLogin
@RequestMapping(value="/getConfigInfo.json", method=RequestMethod.POST)
@ResponseBody
public Object getConfigInfo(String url) throws NoSuchAlgorithmException{
String noncestr = "dsfww";
JsapiTicket ticket = AccessTokenJsapiTicketThread.getTicket();
logger.debug("ticket::::::;" + JSON.toJSONString(ticket));
System.out.println("ticket::::::;" + JSON.toJSONString(ticket));
if(ticket != null){
long timestamp = new Date().getTime();
StringBuilder sb = new StringBuilder("jsapi_ticket=");
sb.append(ticket.getTicket()).append("&noncestr=").append(noncestr)
.append("×tamp=").append(timestamp).append("&url=").append(url);
MessageDigest md = MessageDigest.getInstance("SHA-1");
// 对接后的字符串进行sha1加密
byte[] digest = md.digest(sb.toString().getBytes());
String signature = SignUtil.byteToStr(digest).toLowerCase();
Map<String, String> map = new HashMap<String, String>();
map.put("jsapi_ticket", ticket.getTicket());
map.put("appId", WxPayConfPub.APPID);
map.put("timestamp", String.valueOf(timestamp));
map.put("nonceStr", noncestr);
map.put("signature", signature);
map.put("originalStr", sb.toString());
logger.debug(JSON.toJSONString(map));
System.out.println(JSON.toJSONString(map));
return JsonConvertor.convertSuccessResult(map);
}
return JsonConvertor.convertFailResult(ErrorCodeEnum.SYSTEM_ERROR);
}
@NoLogin
@RequestMapping(value="/getPhoto.json", method=RequestMethod.POST)
@ResponseBody
public Object getPhoto(String media_id) throws NoSuchAlgorithmException{
//http请求方式: GET,https调用
// var url = "https://api.weixin.qq.com/cgi-bin/media/get?access_token=ACCESS_TOKEN&media_id=MEDIA_ID";
AccessToken token = AccessTokenJsapiTicketThread.accessToken;
String url = "https://api.weixin.qq.com/cgi-bin/media/get?access_token=" + token.getAccess_token() + "&media_id=" + media_id;
HttpsURLConnection httpsUrl = null;
InputStream inputStream = null;
Date now = new Date();
String saveFileName = null;
try {
httpsUrl = HttpUtil.initHttpsConnection(url, "GET");
int responseCode = httpsUrl.getResponseCode();
if (responseCode == 200) {
// 从服务器返回一个输入流
inputStream = httpsUrl.getInputStream();
byte[] data = new byte[1024];
int len = 0;
FileOutputStream fileOutputStream = null;
saveFileName = DateUtil.convertYMDH(now) + RandomStringUtils.random(6, true, true) + ".jpg";;
// 绝对路径
String path = imageRootPath + DateUtil.convertYMD(now) + "/" + saveFileName;
File dir = new File(imageRootPath + DateUtil.convertYMD(now) + "/");
if (!dir.exists()) {
FileUtils.forceMkdir(dir);
}
try {
fileOutputStream = new FileOutputStream(path);
while ((len = inputStream.read(data)) != -1) {
fileOutputStream.write(data, 0, len);
}
fileOutputStream.flush();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
}
}
if (fileOutputStream != null) {
try {
fileOutputStream.close();
} catch (IOException e) {
}
}
}
}
} catch (IOException e) {
e.printStackTrace();
}
// 返回图片路径
return JsonConvertor.convertSuccessResult(DateUtil.convertYMD(now) + "/" + saveFileName);
}
/getConfigInfo.json 接口是配置 jsapi 权限认证。
/getPhoto.json 是从 微信服务器下载照片,保存到我们自己的服务器上。然后将我们自己服务器的地方返回给前端使用。