Java集成小程序,獲取用戶信息

小程序開發文檔:https://mp.weixin.qq.com/debug/wxadoc/dev/

參考文章:http://www.jb51.net/article/117352.htm

微信小程序登錄獲取用戶信息

WeChaConnView.java

@RestController
@RequestMapping(value = "/wechat")
public class WeChaConnView {

    /** 
     * 解密用戶敏感數據 
     * 
     * @param encryptedData 明文,加密數據 
     * @param iv      加密算法的初始向量 
     * @param code     用戶允許登錄後,回調內容會帶上 code(有效期五分鐘),開發者需要將 code 發送到開發者服務器後臺,使用code 換取 session_key api,將 code 換成 openid 和 session_key 
     * @return 
     */
    @ResponseBody
    @RequestMapping(value = "/decodeUser", method = RequestMethod.POST) 
    public DataResponse decodeUser(@RequestParam("encryptedData")String encryptedData, 
            @RequestParam("iv")String iv, 
            @RequestParam("code")String code) { 
        DataResponse response = new DataResponse();
        Map<String, Object> map = new HashMap<>(); 

        //登錄憑證不能爲空 
        if (code == null || code.length() == 0) { 
            /*map.put("status", 0); 
            map.put("msg", "code 不能爲空");

            return map;*/
            response.setResult_code("failed");
            response.setResult_msg("code 不能爲空");

            return response; 
        } 

        //小程序唯一標識  (在微信小程序管理後臺獲取) 
        String wxspAppid = "xxxxxx"; 
        //小程序的 app secret (在微信小程序管理後臺獲取) 
        String wxspSecret = "xxxxxx"; 
        //授權(必填) 
        String grant_type = "authorization_code"; 

        //////////////// 1、向微信服務器 使用登錄憑證 code 獲取 session_key 和 openid //////////////// 
        //請求參數 
        String params = "appid=" + wxspAppid + "&secret=" + wxspSecret + "&js_code=" + code + "&grant_type=" + grant_type; 
        //發送請求 
        String sr = HttpRequest.sendGet("https://api.weixin.qq.com/sns/jscode2session", params); 
        //解析相應內容(轉換成json對象) 
        Gson gson = new Gson();
        JsonObject json = gson.fromJson(sr, JsonObject.class);
        System.out.println(json);
//      JSONObject json = JSONObject.fromObject(sr);

        if (json.get("session_key") == null) {
            /*map.put("status", 0); 
            map.put("msg", "解密失敗");

            return map;*/
            response.setResult_code("failed");
            response.setResult_msg("解密失敗:" + json.get("errmsg").toString().replaceAll("\"", ""));

            return response;
        }
        //獲取會話密鑰(session_key) 
        String session_key = json.get("session_key").toString(); 
        //用戶的唯一標識(openid) 
//      String openid = (String) json.get("openid"); 
        String openid = json.get("openid").toString();

        //////////////// 2、對encryptedData加密數據進行AES解密 //////////////// 
        try { 
            String result = AesCbcUtil.decrypt(encryptedData, session_key, iv, "UTF-8"); 
            if (null != result && result.length() > 0) { 
                /*map.put("status", 1); 
                map.put("msg", "解密成功"); */

                JsonObject userInfoJSON = gson.fromJson(result, JsonObject.class);
//              JSONObject userInfoJSON = JSONObject.fromObject(result); 
                System.out.println("user: " + userInfoJSON);
                Map<String, Object> userInfo = new HashMap<>(); 
                userInfo.put("openId", openid.replaceAll("\"", ""));
                userInfo.put("phoneNumber", userInfoJSON.get("phoneNumber").toString().replaceAll("\"", "")); 
                userInfo.put("purePhoneNumber", userInfoJSON.get("purePhoneNumber").toString().replaceAll("\"", "")); 
                userInfo.put("countryCode", userInfoJSON.get("countryCode").toString().replaceAll("\"", "")); 
                map.put("userInfo", userInfo);
                System.out.println("map: " + map);

                response.setResult_code("success");
                response.setResult_msg("解密成功");
                response.setData(userInfo);

                return response; 
            } 
        } catch (Exception e) { 
            e.printStackTrace(); 
        } 
        /*map.put("status", 0); 
        map.put("msg", "解密失敗");

        return map;*/
        response.setResult_code("failed");
        response.setResult_msg("解密失敗");

        return response; 
    } 
}

返回結果封裝類DataResponse.java

package com.hi.util;

/**
 * Created by Andy on 16/11/15.
 *
 * 返回數據封裝
 */
public class DataResponse {


    //信息詳情
    private String result_msg;

    //成功失敗信息
    private String result_code;

    //公共通知編碼
    private String result_num;

    private PageInfo page;
    private Object data;

    public DataResponse(){}

    public DataResponse(Object data){
        this.data = data;
    }

    public DataResponse(String result_code,String result_msg){
        this.result_code = result_code;
        this.result_msg  = result_msg;
    }

    public DataResponse(String result_code,String result_msg,String result_num){
        this.result_code = result_code;
        this.result_msg  = result_msg;
        this.result_num = result_num;
    }


    public String getResult_num() {
        return result_num;
    }

    public void setResult_num(String result_num) {
        this.result_num = result_num;
    }

    public String getResult_msg() {
        return result_msg;
    }

    public void setResult_msg(String result_msg) {
        this.result_msg = result_msg;
    }

    public String getResult_code() {
        return result_code;
    }

    public void setResult_code(String result_code) {
        this.result_code = result_code;
    }


    public Object getData() {
        return data;
    }

    public void setData(Object data) {

        this.data = data;
    }

    public PageInfo getPage() {
        return page;
    }

    public void setPage(PageInfo page) {
        this.page = page;
    }

}

Http請求封裝類HttpRequest.java

package com.hi.util.http;

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.io.PrintWriter; 
import java.net.URL; 
import java.net.URLConnection; 
import java.util.List; 
import java.util.Map; 

/** 
 * Created by lsh on 2017/6/22. 
 */
public class HttpRequest { 
  /** 
   * 向指定URL發送GET方法的請求 
   * 
   * @param url 
   *      發送請求的URL 
   * @param param 
   *      請求參數,請求參數應該是 name1=value1&name2=value2 的形式。 
   * @return URL 所代表遠程資源的響應結果 
   */
  public static String sendGet(String url, String param) { 
    String result = ""; 
    BufferedReader in = null; 
    try { 
      String urlNameString = url + "?" + param; 
      URL realUrl = new URL(urlNameString); 
      // 打開和URL之間的連接 
      URLConnection connection = realUrl.openConnection(); 
      // 設置通用的請求屬性 
      connection.setRequestProperty("accept", "*/*"); 
      connection.setRequestProperty("connection", "Keep-Alive"); 
      connection.setRequestProperty("user-agent", 
          "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); 
      // 建立實際的連接 
      connection.connect(); 
      // 獲取所有響應頭字段 
      Map<String, List<String>> map = connection.getHeaderFields(); 
      // 遍歷所有的響應頭字段 
      for (String key : map.keySet()) { 
        System.out.println(key + "--->" + map.get(key)); 
      } 
      // 定義 BufferedReader輸入流來讀取URL的響應 
      in = new BufferedReader(new InputStreamReader( 
          connection.getInputStream())); 
      String line; 
      while ((line = in.readLine()) != null) { 
        result += line; 
      } 
    } catch (Exception e) { 
      System.out.println("發送GET請求出現異常!" + e); 
      e.printStackTrace(); 
    } 
    // 使用finally塊來關閉輸入流 
    finally { 
      try { 
        if (in != null) { 
          in.close(); 
        } 
      } catch (Exception e2) { 
        e2.printStackTrace(); 
      } 
    } 
    return result; 
  } 

  /** 
   * 向指定 URL 發送POST方法的請求 
   * 
   * @param url 
   *      發送請求的 URL 
   * @param param 
   *      請求參數,請求參數應該是 name1=value1&name2=value2 的形式。 
   * @return 所代表遠程資源的響應結果 
   */
  public static String sendPost(String url, String param) { 
    PrintWriter out = null; 
    BufferedReader in = null; 
    String result = ""; 
    try { 
      URL realUrl = new URL(url); 
      // 打開和URL之間的連接 
      URLConnection conn = realUrl.openConnection(); 
      // 設置通用的請求屬性 
      conn.setRequestProperty("accept", "*/*"); 
      conn.setRequestProperty("connection", "Keep-Alive"); 
      conn.setRequestProperty("user-agent", 
          "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); 
      // 發送POST請求必須設置如下兩行 
      conn.setDoOutput(true); 
      conn.setDoInput(true); 
      // 獲取URLConnection對象對應的輸出流 
      out = new PrintWriter(conn.getOutputStream()); 
      // 發送請求參數 
      out.print(param); 
      // flush輸出流的緩衝 
      out.flush(); 
      // 定義BufferedReader輸入流來讀取URL的響應 
      in = new BufferedReader( 
          new InputStreamReader(conn.getInputStream())); 
      String line; 
      while ((line = in.readLine()) != null) { 
        result += line; 
      } 
    } catch (Exception e) { 
      System.out.println("發送 POST 請求出現異常!"+e); 
      e.printStackTrace(); 
    } 
    //使用finally塊來關閉輸出流、輸入流 
    finally{ 
      try{ 
        if(out!=null){ 
          out.close(); 
        } 
        if(in!=null){ 
          in.close(); 
        } 
      } 
      catch(IOException ex){ 
        ex.printStackTrace(); 
      } 
    } 
    return result; 
  } 
}

對返回用戶信息進行加密解密的工具類AesCbcUtil.java

package com.hi.util;

import org.apache.commons.codec.binary.Base64; 
import org.bouncycastle.jce.provider.BouncyCastleProvider; 

import javax.crypto.BadPaddingException; 
import javax.crypto.Cipher; 
import javax.crypto.IllegalBlockSizeException; 
import javax.crypto.NoSuchPaddingException; 
import javax.crypto.spec.IvParameterSpec; 
import javax.crypto.spec.SecretKeySpec; 
import java.io.UnsupportedEncodingException; 
import java.security.*; 
import java.security.spec.InvalidParameterSpecException; 

/** 
 * Created by lsh 
 * AES-128-CBC 加密方式 
 * 注: 
 * AES-128-CBC可以自己定義“密鑰”和“偏移量“。 
 * AES-128是jdk自動生成的“密鑰”。 
 */
public class AesCbcUtil { 


  static { 
    //BouncyCastle是一個開源的加解密解決方案,主頁在http://www.bouncycastle.org/ 
    Security.addProvider(new BouncyCastleProvider()); 
  } 

  /** 
   * AES解密 
   * 
   * @param data      //密文,被加密的數據 
   * @param key      //祕鑰 
   * @param iv       //偏移量 
   * @param encodingFormat //解密後的結果需要進行的編碼 
   * @return 
   * @throws Exception 
   */
  public static String decrypt(String data, String key, String iv, String encodingFormat) throws Exception { 
//    initialize(); 

    //被加密的數據 
    byte[] dataByte = Base64.decodeBase64(data); 
    //加密祕鑰 
    byte[] keyByte = Base64.decodeBase64(key); 
    //偏移量 
    byte[] ivByte = Base64.decodeBase64(iv); 


    try { 
      Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding"); 

      SecretKeySpec spec = new SecretKeySpec(keyByte, "AES"); 

      AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES"); 
      parameters.init(new IvParameterSpec(ivByte)); 

      cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化 

      byte[] resultByte = cipher.doFinal(dataByte); 
      if (null != resultByte && resultByte.length > 0) { 
        String result = new String(resultByte, encodingFormat); 
        return result; 
      } 
      return null; 
    } catch (NoSuchAlgorithmException e) { 
      e.printStackTrace(); 
    } catch (NoSuchPaddingException e) { 
      e.printStackTrace(); 
    } catch (InvalidParameterSpecException e) { 
      e.printStackTrace(); 
    } catch (InvalidKeyException e) { 
      e.printStackTrace(); 
    } catch (InvalidAlgorithmParameterException e) { 
      e.printStackTrace(); 
    } catch (IllegalBlockSizeException e) { 
      e.printStackTrace(); 
    } catch (BadPaddingException e) { 
      e.printStackTrace(); 
    } catch (UnsupportedEncodingException e) { 
      e.printStackTrace(); 
    } 

    return null; 
  } 

} 

至此,Java獲取微信用戶信息的功能完成。

小程序集成推薦開源工具:
https://github.com/Wechat-Group/weixin-java-tools/wiki/%E5%B0%8F%E7%A8%8B%E5%BA%8F%E5%BC%80%E5%8F%91%E6%96%87%E6%A1%A3

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