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微信工具类

WXUtils-工具类

package cn.com.hwqh.user.config;

import cn.com.hwqh.user.entity.model.OAuthInfo;
import cn.com.hwqh.user.entity.model.WxUser;
import cn.com.hwqh.user.util.JacksonUtils;
import cn.com.hwqh.user.util.utility.HttpRequestUtil;
import cn.com.hwqh.util.FastJsonHelper;
import cn.com.hwqh.util.MyConfiguration;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URI;


/**
 * @ClassName: WXUtils
 * @version: 1.0
 * @description:
 * @author: zhaonian
 * @create: 2020-01-07 14:17
 **/
public class WXUtils {
    /**
     * wx.appid
     */
    public static final String WX_APPID = MyConfiguration.create().getString("wx.appid");

    /**
     * wx.secret
     */
    public static final String WX_SECRET = MyConfiguration.create().getString("wx.secret");

    /**
     * wx.REDIRECT_URI
     */
    public static final String REDIRECT_URI = MyConfiguration.create().getString("wx.redirect_uri");
    static Long expires_in;
    static String refreshToken;
    static String scope;

    /**
     * 获取access_token
     */
    public static OAuthInfo getAccessToken(String code) {
        String authUrl = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code ";
        authUrl = authUrl.replace("APPID", WXUtils.WX_APPID);
        authUrl = authUrl.replace("SECRET", WXUtils.WX_SECRET);
        authUrl = authUrl.replace("CODE", code);
        String jsonString = HttpRequestUtil.sendPost(authUrl, "");
        System.out.println("jsonString: " + jsonString);
        OAuthInfo auth = null;
        try {
            auth = (OAuthInfo) JacksonUtils.readValue(jsonString, OAuthInfo.class);
            expires_in = auth.getExpires_in();
            refreshToken = auth.getRefresh_token();
            scope = auth.getScope();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return auth;
    }


    /**
     * WX_APPID： 微信开发者测试账号
     * REDIRECT_URI： 同意授权后跳转的 URL
     * 第一步：用户同意授权，获取code(引导关注者打开如下页面：)
     * 获取 code、state
     */
    public static String getStartURLToGetCode() {
        String takenUrl = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=APPID&redirect_uri=REDIRECT_URI&response_type=code&scope=SCOPE&state=STATE#wechat_redirect";
        takenUrl = takenUrl.replace("APPID", WXUtils.WX_APPID);
//        takenUrl= takenUrl.replace("REDIRECT_URI", URL.encode(WXUtils.REDIRECT_URI,"UTF-8"));
        //FIXME ： snsapi_userinfo
        takenUrl = takenUrl.replace("SCOPE", "snsapi_userinfo");
        System.out.println(takenUrl);
        return takenUrl;
    }

    /**
     * 获取用户信息
     */
    public static WxUser getUserInfo(String accessToken,String openID,Long expires_in) {
        if (isAccessTokenIsInvalid(accessToken,openID) ) {
            String uri = "https://api.weixin.qq.com/sns/userinfo?access_token=" + accessToken + "&openid=" + openID;
            HttpClient client = new DefaultHttpClient();
            HttpGet get = new HttpGet(URI.create(uri));
            try {
                HttpResponse response = client.execute(get);
                if (response.getStatusLine().getStatusCode() == 200) {
                    BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8"));
                    StringBuilder builder = new StringBuilder();
                    for (String temp = reader.readLine(); temp != null; temp = reader.readLine()) {
                        builder.append(temp);
                    }
                    WxUser wxUser = FastJsonHelper.jsonDecode(builder.toString(), WxUser.class);
                    return wxUser ;
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return  new WxUser();
    }

    /**
     * 检验授权凭证（access_token）是否有效
     *
     * @return
     */
    private static boolean isAccessTokenIsInvalid(String accessToken, String openID) {
        String url = "https://api.weixin.qq.com/sns/auth?access_token=" + accessToken + "&openid=" + openID;
        URI uri = URI.create(url);
        HttpClient client = new DefaultHttpClient();
        HttpGet get = new HttpGet(uri);
        HttpResponse response;
        try {
            response = client.execute(get);
            if (response.getStatusLine().getStatusCode() == 200) {
                HttpEntity entity = response.getEntity();

                BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent(), "UTF-8"));
                StringBuilder sb = new StringBuilder();

                for (String temp = reader.readLine(); temp != null; temp = reader.readLine()) {
                    sb.append(temp);
                }
                JSONObject object = new JSONObject(sb.toString().trim());
                int errorCode = object.getInt("errcode");
                if (errorCode == 0) {
                    return true;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }
}