先调用微信的地址 跳转https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx4b4009c4fce00e0c&redirect_uri=这里填写你要跳到请求页面授权域名l&response_type=code&scope=snsapi_base&state=123#wechat_redirect
返回redirect_uri/?code=""&status="";
拿到code就可获取openid以及用户信息
先上 工具类
1 package com.yulv.utils;
2
3 import java.io.BufferedReader;
4 import java.io.IOException;
5 import java.io.InputStream;
6 import java.io.InputStreamReader;
7 import java.io.OutputStream;
8 import java.io.OutputStreamWriter;
9 import java.net.HttpURLConnection;
10 import java.net.InetSocketAddress;
11 import java.net.Proxy;
12 import java.net.URL;
13 import java.net.URLConnection;
14 import java.util.Iterator;
15 import java.util.Map;
16
17
18 public class HttpRequestor {
19 private String charset = "utf-8";
20 private Integer connectTimeout = null;
21 private Integer socketTimeout = null;
22 private String proxyHost = null;
23 private Integer proxyPort = null;
24
25 /**
26 * Do GET request
27 * @param url
28 * @return
29 * @throws Exception
30 * @throws IOException
31 */
32 public String doGet(String url) throws Exception {
33
34 URL localURL = new URL(url);
35
36 URLConnection connection = openConnection(localURL);
37 HttpURLConnection httpURLConnection = (HttpURLConnection)connection;
38
39 httpURLConnection.setRequestProperty("Accept-Charset", charset);
40 httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
41
42 InputStream inputStream = null;
43 InputStreamReader inputStreamReader = null;
44 BufferedReader reader = null;
45 StringBuffer resultBuffer = new StringBuffer();
46 String tempLine = null;
47
48 if (httpURLConnection.getResponseCode() >= 300) {
49 throw new Exception("HTTP Request is not success, Response code is " + httpURLConnection.getResponseCode());
50 }
51
52 try {
53 inputStream = httpURLConnection.getInputStream();
54 inputStreamReader = new InputStreamReader(inputStream,"UTF-8");
55 reader = new BufferedReader(inputStreamReader);
56
57 while ((tempLine = reader.readLine()) != null) {
58 resultBuffer.append(tempLine);
59 }
60
61 } finally {
62
63 if (reader != null) {
64 reader.close();
65 }
66
67 if (inputStreamReader != null) {
68 inputStreamReader.close();
69 }
70
71 if (inputStream != null) {
72 inputStream.close();
73 }
74
75 }
76
77 return resultBuffer.toString();
78 }
79
80 /**
81 * Do POST request
82 * @param url
83 * @param parameterMap
84 * @return
85 * @throws Exception
86 */
87 public String doPost(String url, Map parameterMap) throws Exception {
88
89 /* Translate parameter map to parameter date string */
90 StringBuffer parameterBuffer = new StringBuffer();
91 if (parameterMap != null) {
92 Iterator iterator = parameterMap.keySet().iterator();
93 String key = null;
94 String value = null;
95 while (iterator.hasNext()) {
96 key = (String)iterator.next();
97 if (parameterMap.get(key) != null) {
98 value = (String)parameterMap.get(key);
99 } else {
100 value = "";
101 }
102
103 parameterBuffer.append(key).append("=").append(value);
104 if (iterator.hasNext()) {
105 parameterBuffer.append("&");
106 }
107 }
108 }
109
110 System.out.println("POST parameter : " + parameterBuffer.toString());
111
112 URL localURL = new URL(url);
113
114 URLConnection connection = openConnection(localURL);
115 HttpURLConnection httpURLConnection = (HttpURLConnection)connection;
116
117 httpURLConnection.setDoOutput(true);
118 httpURLConnection.setRequestMethod("POST");
119 httpURLConnection.setRequestProperty("Accept-Charset", charset);
120 httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
121 httpURLConnection.setRequestProperty("Content-Length", String.valueOf(parameterBuffer.length()));
122
123 OutputStream outputStream = null;
124 OutputStreamWriter outputStreamWriter = null;
125 InputStream inputStream = null;
126 InputStreamReader inputStreamReader = null;
127 BufferedReader reader = null;
128 StringBuffer resultBuffer = new StringBuffer();
129 String tempLine = null;
130
131 try {
132 outputStream = httpURLConnection.getOutputStream();
133 outputStreamWriter = new OutputStreamWriter(outputStream);
134
135 outputStreamWriter.write(parameterBuffer.toString());
136 outputStreamWriter.flush();
137
138 if (httpURLConnection.getResponseCode() >= 300) {
139 throw new Exception("HTTP Request is not success, Response code is " + httpURLConnection.getResponseCode());
140 }
141
142 inputStream = httpURLConnection.getInputStream();
143 inputStreamReader = new InputStreamReader(inputStream);
144 reader = new BufferedReader(inputStreamReader);
145
146 while ((tempLine = reader.readLine()) != null) {
147 resultBuffer.append(tempLine);
148 }
149
150 } finally {
151
152 if (outputStreamWriter != null) {
153 outputStreamWriter.close();
154 }
155
156 if (outputStream != null) {
157 outputStream.close();
158 }
159
160 if (reader != null) {
161 reader.close();
162 }
163
164 if (inputStreamReader != null) {
165 inputStreamReader.close();
166 }
167
168 if (inputStream != null) {
169 inputStream.close();
170 }
171
172 }
173
174 return resultBuffer.toString();
175 }
176
177 private URLConnection openConnection(URL localURL) throws IOException {
178 URLConnection connection;
179 if (proxyHost != null && proxyPort != null) {
180 Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyHost, proxyPort));
181 connection = localURL.openConnection(proxy);
182 } else {
183 connection = localURL.openConnection();
184 }
185 return connection;
186 }
187
188 /**
189 * Render request according setting
190 * @param request
191 */
192 private void renderRequest(URLConnection connection) {
193
194 if (connectTimeout != null) {
195 connection.setConnectTimeout(connectTimeout);
196 }
197
198 if (socketTimeout != null) {
199 connection.setReadTimeout(socketTimeout);
200 }
201
202 }
203
204 /*
205 * Getter & Setter
206 */
207 public Integer getConnectTimeout() {
208 return connectTimeout;
209 }
210
211 public void setConnectTimeout(Integer connectTimeout) {
212 this.connectTimeout = connectTimeout;
213 }
214
215 public Integer getSocketTimeout() {
216 return socketTimeout;
217 }
218
219 public void setSocketTimeout(Integer socketTimeout) {
220 this.socketTimeout = socketTimeout;
221 }
222
223 public String getProxyHost() {
224 return proxyHost;
225 }
226
227 public void setProxyHost(String proxyHost) {
228 this.proxyHost = proxyHost;
229 }
230
231 public Integer getProxyPort() {
232 return proxyPort;
233 }
234
235 public void setProxyPort(Integer proxyPort) {
236 this.proxyPort = proxyPort;
237 }
238
239 public String getCharset() {
240 return charset;
241 }
242
243 public void setCharset(String charset) {
244 this.charset = charset;
245 }
246 }
直接获取
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String code = request.getParameter("code");
String appid = "wx4b4009c4fce00e0c";
String secret = "4d3aea976157935e563f8ef01c7a4293";
String requestUrl = "https://api.weixin.qq.com/sns/oauth2/access_token?appid="+appid+"&secret="+secret+"&code="+wxCode+"&grant_type=authorization_code";
//第一次请求 获取access_token 和 openid
String oppid = new HttpRequestor().doGet(requestUrl);
JSONObject oppidObj =JSONObject.fromObject(oppid);
String access_token = (String) oppidObj.get("access_token");
String openid = (String) oppidObj.get("openid");
String requestUrl2 = "https://api.weixin.qq.com/sns/userinfo?access_token="+access_token+"&openid="+openid+"&lang=zh_CN";
String userInfoStr = new HttpRequestor().doGet(requestUrl2);
JSONObject wxUserInfo =JSONObject.fromObject(userInfoStr);
}
时间： 2024-08-29 03:42:28