Java微信公众号开发之通过微信公众号获取用户信息

最近由于公司业务，就开始研究微信开发的流程，说实话，这东西刚开始看到时候和看天书的一样，总算，看了一天的文档，测试代码终于出来了。

1、首先需要到微信网站去设置一下，我是直接用的微信测试号。

　　　　　　　　接口配置信息必须要填写的，所以说必须能将自己的服务发布出去

　　　　　　　　　　

　　　　　　　　　　　　

　　　　　　　　　　　　

                             到此微信配置完毕，接下来就是直接上代码了

2、获取用户信息的方式一共是两种，前提都是用户关注微信公众号，一种是静默获取(snsapi_base,这种方式只能获取openid)，另一种是授权获取(snsapi_userinfo,可以获取用户的详细信息)。

      先说第一种

　　(1)首先需要先访问微信的链接

　　　　

           这里的 uri就是直接回掉我们的服务地址，一定要记住，服务校验的判断，我是按照来判断的echostr(第二种方式也是这样)

package net.itraf.controller;
import java.io.ioexception;
import java.io.inputstream;
import java.io.printwriter;
import java.net.httpurlconnection;
import java.net.malformedurlexception;
import java.net.url;
import javax.servlet.http.httpservletresponse;
import org.springframework.stereotype.controller;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.responsebody;
import com.alibaba.fastjson.jsonobject;
@controller
@requestmapping("/open")
public class opencontroller {
  @requestmapping("/toopenid")
  public @responsebody string getopenid(string code,string echostr,httpservletresponse res) throws ioexception{
    if(echostr==null){
      string url="https://api.weixin.qq.com/sns/oauth2/access_token?appid=wx24d47d2080f54c5b&secret=95011ac70909e8cca2786217dd80ee3f&code="+code+"&grant_type=authorization_code";
      system.out.println(code);
      string openid="";
      try {
        url geturl=new url(url);
        httpurlconnection http=(httpurlconnection)geturl.openconnection();
        http.setrequestmethod("get"); 
        http.setrequestproperty("content-type","application/x-www-form-urlencoded");
        http.setdooutput(true);
        http.setdoinput(true);
        http.connect();
        inputstream is = http.getinputstream(); 
        int size = is.available(); 
        byte[] b = new byte[size];
        is.read(b);
        string message = new string(b, "utf-8");
        jsonobject json = jsonobject.parseobject(message);
        openid = json.getstring("openid");
        } catch (malformedurlexception e) {
          e.printstacktrace();
        } catch (ioexception e) {
          e.printstacktrace();
        }
      return openid;
    }else{
      printwriter out = res.getwriter();
      out.print(echostr);
      return null;
    }
  }
  //做服务器校验
  @requestmapping("/tovalid")
  public void valid(string echostr,httpservletresponse res) throws ioexception{
    printwriter out = res.getwriter();
    out.print(echostr);
  }
}

第二种

　　　　(1)

 域名

/open/openid&response_type=code&scope=snsapi_userinfo&state=1&connect_redirect=1#wechat_redirect

package net.itraf.controller;
import java.io.ioexception;
import java.io.printwriter;
import javax.servlet.servletexception;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
import net.sf.json.jsonobject;
import org.springframework.stereotype.controller;
import org.springframework.web.bind.annotation.requestmapping;
@controller
@requestmapping("/weixin")
public class oauth2action {
  @requestmapping("/oauth")
  public void auth(httpservletrequest request, httpservletresponse response)
      throws servletexception, ioexception {
    string echostr = request.getparameter("echostr");
    if(echostr==null){
      string appid = "wx24d47d2080f54c5b";
      string appsecret = "95011ac70909e8cca2786217dd80ee3f";
      //拼接
      string get_access_token_url = "https://api.weixin.qq.com/sns/oauth2/access_token?"
          + "appid="
          + appid
          + "&secret="
          + appsecret
          + "&code=code&grant_type=authorization_code";
      string get_userinfo = "https://api.weixin.qq.com/sns/userinfo?access_token=access_token&openid=openid&lang=zh_cn";
      request.setcharacterencoding("utf-8");
      response.setcharacterencoding("utf-8");
      string code = request.getparameter("code");
      system.out.println("******************code=" + code);
      get_access_token_url = get_access_token_url.replace("code", code);
      string json = httpsgetutil.dohttpsgetjson(get_access_token_url);
      jsonobject jsonobject = jsonobject.fromobject(json);
      string access_token = jsonobject.getstring("access_token");
      string openid = jsonobject.getstring("openid");
      get_userinfo = get_userinfo.replace("access_token", access_token);
      get_userinfo = get_userinfo.replace("openid", openid);
      string userinfojson = httpsgetutil.dohttpsgetjson(get_userinfo);
      jsonobject userinfojo = jsonobject.fromobject(userinfojson);
      string user_openid = userinfojo.getstring("openid");
      string user_nickname = userinfojo.getstring("nickname");
      string user_sex = userinfojo.getstring("sex");
      string user_province = userinfojo.getstring("province");
      string user_city = userinfojo.getstring("city");
      string user_country = userinfojo.getstring("country");
      string user_headimgurl = userinfojo.getstring("headimgurl");
      response.setcontenttype("text/html; charset=utf-8");
      printwriter out = response.getwriter();
      out.println("<!doctype html public \"-//w3c//dtd html 4.01 transitional//en\">");
      out.println("<html>");
      out.println(" <head><title>a servlet</title></head>");
      out.println(" <body>");
      out.print(" this is ");
      out.print(this.getclass());
      out.println(", using the post method \n");
      out.println("openid:" + user_openid + "\n\n");
      out.println("nickname:" + user_nickname + "\n\n");
      out.println("sex:" + user_sex + "\n\n");
      out.println("province:" + user_province + "\n\n");
      out.println("city:" + user_city + "\n\n");
      out.println("country:" + user_country + "\n\n");
      out.println("<img src=/" + user_headimgurl + "/");
      out.println(">");
      out.println(" </body>");
      out.println("</html>");
      out.flush();
      out.close();
    }else{
      printwriter out = response.getwriter();
      out.print(echostr);
    }
  }
}

package net.itraf.controller;
import java.io.ioexception;
import java.io.inputstream;
import java.net.httpurlconnection;
import java.net.malformedurlexception;
import java.net.url;
public class httpsgetutil {
  public static string dohttpsgetjson(string url)
  {
    string message = "";
    try
    {
      system.out.println("dohttpsgetjson");//todo:dd
      url urlget = new url(url);
      httpurlconnection http = (httpurlconnection) urlget.openconnection(); 
      http.setrequestmethod("get");   //必须是get方式请求  24      
      http.setrequestproperty("content-type","application/x-www-form-urlencoded"); 
      http.setdooutput(true); 
      http.setdoinput(true);
      system.setproperty("sun.net.client.defaultconnecttimeout", "30000");//连接超时30秒28   
      system.setproperty("sun.net.client.defaultreadtimeout", "30000"); //读取超时30秒29 30    
      http.connect();
      inputstream is =http.getinputstream();
      int size =is.available();
      byte[] jsonbytes =new byte[size];
      is.read(jsonbytes);
      message=new string(jsonbytes,"utf-8");
    } 
    catch (malformedurlexception e)
    {
       e.printstacktrace();
     }
    catch (ioexception e)
     {
       e.printstacktrace();
     } 
    return message;
  }
}

以上所述是小编给大家介绍的java微信公众号开发之通过微信公众号获取用户信息，希望对大家有所帮助