地址：https://mp.weixin..com/ 

2.公众号配置
2.1.在进入公众号后台后，在左边侧边栏找到基本配置，就可以看到APPID与AppSecret
2.2.配置服务器配置：在APPID与AppSecret页面下有一个服务器配置，需要配置，配置中的token是一个坑，需要先写验证请求才能把token配置成功。图片里的工具了在下面代码中，具体如图：

讯享网

2.3. 添加页面授权（也就是在那个页面可以调起登录，一般设置为域名即可）

2.4在接口权限中找到

3.需要的包

讯享网 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <!--网络链接--> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.12</version> </dependency> <!--json处理--> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.60</version> </dependency> 

4.编写验证token的工具类

package com.taxing.wxopenid.utills; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; / * 签名认证工具类 * @ClassName: WeixinCheckoutUtil * */ public class WeixinCheckoutUtil { 
    // 与接口配置信息中的Token要一致 private static String token = "2fdf28s0fhdfgsf26aff"; / * 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; } } } } } 

5.编写验证token的controller

讯享网/ * 微信公众号签名认证接口 * @Title: test * @throws */ @RequestMapping("/wx") public String test(String signature,String timestamp,String nonce,String echostr) { 
    // 通过检验signature对请求进行校验，若校验成功则原样返回echostr，表示接入成功，否则接入失败 if (signature != null && WeixinCheckoutUtil.checkSignature(signature, timestamp, nonce)) { 
    return echostr; } return null; } 

6.微信内浏览器获得openid

@RequestMapping("/wx") @RestController public class WeiXinController { 
    String appid="公众号id"; String AppSecret="公众号密钥"; String originUrl="登录完成后进入的页面"; @GetMapping("getcode") public void getCode(HttpServletResponse response ) throws IOException { 
    String cooke="https://open.weixin..com/connect/oauth2/authorize?redirect_uri="+ originUrl+ "&appid="+appid+ "&secret="+AppSecret+ "&response_type=code" + "&scope=snsapi_userinfo" + "&state=STATE" + "&connect_redirect=1#wechat_redirect"; //重定向，重定向后就可以看到微信公众号调起登录的选项款，同时微信授权登录后会把code追加到我们重定向地址的后面 response.sendRedirect(cooke); } //前端获得code调用请求并把code传到我们获得openid的请求中 @RequestMapping("/getOpenid") public WxInfo getOpenid(String code) throws IOException { 
    WxInfo wxinfo = null; //创建请求 HttpGet Url = new HttpGet("https://api.weixin..com/sns/jscode2session?appid=" +appid + "&secret=" + AppSecret+ "&js_code=" + code + "&grant_type=authorization_code"); BufferedReader result = getClient(Url); //向微信请求，返回的数据中就有openid信息 String line=""; while ((line=result.readLine())!=null){ 
    wxinfo = JSON.parseObject(line, WxInfo.class);//解析出来的数据时json,我们使用fastjson把数据转换为对象 } return wxinfo; } //把流转变为IO public BufferedReader getClient(HttpGet url){ 
    CloseableHttpClient httpClient = HttpClientBuilder.create().build(); try { 
    CloseableHttpResponse response = httpClient.execute(url); HttpEntity enity = response.getEntity(); InputStream content = enity.getContent(); return new BufferedReader(new InputStreamReader(content));//解析url中的数据，就是把它转发为IO流 } catch (IOException e) { 
    e.printStackTrace(); System.out.println("链接错误，请检查网址"); return null; } } } 

7.实体类

讯享网@Data @EqualsAndHashCode(callSuper = false) @Accessors(chain = true) public class WxInfo { 
    private String APP_ID;//小程序id private String APP_SECRET;//小程序密钥 private String session_key;//seesion private String openid;//用户openid } 

8.uniapp中获得code

onLoad() { 
    let code = this.getQueryString('code')//获得地址中参数 this.openid(code) }, methods: { 
    getQueryString(name) { 
    const reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i'); const search = window.location.search.split('?')[1] || ''; const r = search.match(reg) || []; return r[2]; } openid(codes){ 
    let data={ 
    code:codes } uni.request({ 
    url: '根据code获得openid的接口地址', //仅为示例，并非真实接口地址。 data: { 
    code: codes }, success: function(res) { 
    console.log(res.data); } }); } }