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)
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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);
}
}
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第二种
(1)
域名
/open/openid&response_type=code&scope=snsapi_userinfo&state=1&connect_redirect=1#wechat_redirect
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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);
}
}
}
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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;
}
}
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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，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：http://www.cnblogs.com/yangming5423/archive/2017/05/18/6873267.html