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); }