Java 生成微信小程序码（getwxacodeunlimit）

小鱼儿 2024-04-17 14:46 73阅读 0赞

1.java 代码

package cn.xyz.commons.utils;
    
    import java.io.ByteArrayOutputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.OutputStream;
    import java.util.Base64;
    import java.util.HashMap;
    import java.util.Map;
    import java.util.Set;
     
    import org.apache.http.HttpEntity;
    import org.apache.http.HttpResponse;
    import org.apache.http.client.methods.HttpGet;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.entity.StringEntity;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.impl.client.HttpClients;
    import org.apache.http.protocol.HTTP;
    import org.apache.http.util.EntityUtils;
     
    import com.alibaba.fastjson.JSON;
    
    import cn.xyz.commons.autoconfigure.KApplicationProperties.WXConfig;
    import cn.xyz.mianshi.utils.SKBeanUtils;
     /**
      * 
      * @author cf
      * @date 2019年8月27日 下午12:12:15
      */
    public class WXXCXUtil {
     
    	private static WXConfig wxConfig =SKBeanUtils.getLocalSpringBeanManager().getApplicationConfig().getWxConfig();
    	//获取小程序连接
    		private final static String GETWXACODEUNLIMIT=
    				"https://api.weixin.qq.com/wxa/getwxacodeunlimit";
    		
    	/**
         * @return
         */
        public static Map<String, Object> getToken() {
            Map<String, Object> data = new HashMap<String, Object>();
            try {
                // ======================================================================//
                // 拼接调用微信的URL
                // grant_type：client_credential
                // appid：小程序
                // secret：小程序
                // ======================================================================//
                StringBuilder urlSb = new StringBuilder();
                urlSb.append("https://api.weixin.qq.com/cgi-bin/token");
                urlSb.append("?");
                urlSb.append("grant_type=%s&appid=%s&secret=%s");
                String tokenUrl = String.format(urlSb.toString(), "client_credential", wxConfig.getXcxappid(), wxConfig.getXcxsecret());
                // ======================================================================//
                // 执行URL Get调用
                // ======================================================================//
                CloseableHttpClient httpClient = HttpClients.createDefault();
                HttpGet httpGet = new HttpGet(tokenUrl);
                HttpResponse httpResponse = httpClient.execute(httpGet);
                HttpEntity httpEntity = httpResponse.getEntity();
                String resultText = EntityUtils.toString(httpEntity, "utf-8");
                // ======================================================================//
                // 处理HTTP返回结果
                // ======================================================================//
                @SuppressWarnings("unchecked")
                Map<Object, Object> resultMap = JSON.parseObject(resultText, Map.class);
                if (resultMap != null) {
                    if (resultMap != null && resultMap.size() > 0) {
                        // 合并2次调用结果
                        Set<Object> keySet = resultMap.keySet();
                        for (Object key : keySet) {
                            if (!data.containsKey(key)) {
                                data.put((String) key, resultMap.get(key));
                            }
                        }
                    }
                }
            } catch (Exception e) {
            	e.printStackTrace();
            }
            return data;
        }
     
        /**
         * @param accessToken
         * @param page
         * @param scene
         * @param width
         * @return
         */
        public static Map<String, Object> getMiniQrCode(String accessToken, String page, String scene, int width) {
            Map<String, Object> data = new HashMap<String, Object>();
            try {
                // ======================================================================//
                // 拼接调用微信的URL
                // ======================================================================//
                String url = GETWXACODEUNLIMIT+"?access_token=" + accessToken;
                Map<String, Object> paramsMap = new HashMap<>();
                paramsMap.put("page", page);
                paramsMap.put("scene", scene);
                paramsMap.put("width", width <= 0 ? 430 : width);
                paramsMap.put("auto_color", false);
                Map<String, Object> line_color = new HashMap<String, Object>();
                line_color.put("r", 0);
                line_color.put("g", 0);
                line_color.put("b", 0);
                paramsMap.put("line_color", line_color);
                System.out.println("调用生成微信URL接口传参：" + paramsMap);
                // ======================================================================//
                // 执行URL Post调用
                // ======================================================================//
                CloseableHttpClient httpClient = HttpClients.createDefault();
                HttpPost httpPost = new HttpPost(url);
                httpPost.addHeader(HTTP.CONTENT_TYPE, "application/json");
                // 必须是json模式的 post
                String body = JSON.toJSONString(paramsMap);
                StringEntity entity = new StringEntity(body);
                entity.setContentType("image/png");
                httpPost.setEntity(entity);
                HttpResponse httpResponse = httpClient.execute(httpPost);
                HttpEntity httpEntity = httpResponse.getEntity();
                // ======================================================================//
                // 处理HTTP返回结果
                // ======================================================================//
                InputStream contentStream = httpEntity.getContent();
                byte[] bytes = toByteArray(contentStream);
                contentStream.read(bytes);
                // 返回内容
                data.put("qrLength", bytes.length);
                data.put("qrBytes", bytes);
                data.put("qrBytesEncoder", Base64.getEncoder().encodeToString(bytes));
            } catch (Exception e) {
                e.printStackTrace();
                System.out.println("调用生成微信小程序码URL接口异常"+e);
            }
            return data;
        }
     
        /**
         * @param input
         * @return
         * @throws IOException
         */
        public static byte[] toByteArray(InputStream input) throws IOException {
            ByteArrayOutputStream output = new ByteArrayOutputStream();
            copy(input, output);
            return output.toByteArray();
        }
     
        /**
         * @param input
         * @param output
         * @return
         * @throws IOException
         */
        public static int copy(InputStream input, OutputStream output) throws IOException {
            long count = copyLarge(input, output);
            if (count > 2147483647L) {
                return -1;
            }
            return (int) count;
        }
     
        /**
         * @param input
         * @param output
         * @return
         * @throws IOException
         */
        public static long copyLarge(InputStream input, OutputStream output) throws IOException {
            byte[] buffer = new byte[4096];
            long count = 0L;
            int n = 0;
            while (-1 != (n = input.read(buffer))) {
                output.write(buffer, 0, n);
                count += n;
            }
            return count;
        }
        
        /**
         * @param args
         */
        public static void main(String[] args) {
            String access_token = (String) WXXCXUtil.getToken().get("access_token");
            Map<String, Object> data = WXXCXUtil.getMiniQrCode(access_token, "pages/index/index",
                    "btype=1&border=xxx",60);
            String qrBytesEncoder = (String) data.get("qrBytesEncoder");
            Integer qrLength = (Integer) data.get("qrLength");
            System.out.println(qrBytesEncoder);
            System.out.println(qrLength);
            byte[] qrBytes = (byte[]) data.get("qrBytes");
            //saveToImg("d://qrcode.png",qrBytes);
        }
     
        /**
         * @param imgPath
         * @param bytes
         * @return
         */
        public static int saveToImg(String imgPath, byte[] bytes) {
            int stateInt = 1;
            try {
                FileOutputStream fos = new FileOutputStream(imgPath);
                fos.write(bytes);
                fos.flush();
                fos.close();
            } catch (Exception e) {
                stateInt = 0;
                e.printStackTrace();
            } finally {
            }
            return stateInt;
        }
     
    }

2.小程序代码

onLoad: function (options) {
        var that = this;
    
        var logs = wx.getStorageSync('logs') || []
        
    
        if (options.scene) {
          let scene = decodeURIComponent(options.scene);
          //&是我们定义的参数链接方式
          let toUserId = scene.split("&")[0];
          let inviteCode = scene.split('&')[1];
          //其他逻辑处理。。。。。
          this.setData({
            toUserId: toUserId,
            inviteCode: inviteCode
          })
    
        }
    }