微信小程序+java后台实现openid获取

写了好一阵子终于把微信小程序的登陆功能实现了,之前就因为返回openid耽误了好一段时间,所以今天就跟大家分享一下java后台的返回openid及解密用户信息。

微信小程序前端:

js页面:

wx.login({
success: function (res) {
var code = res.code; //登录凭证
if (code) {
//2、调用获取用户信息接口
wx.getUserInfo({
success: function (res) {
console.log({ encryptedData: res.encryptedData, iv: res.iv, code: code })
//3.请求自己的服务器,解密用户信息 获取unionId等加密信息
wx.request({
url: 'http://域名/**.action', //自己的服务接口地址
method: 'get',
header: {
"Content-Type": "applciation/json"
},
data: { encryptedData: res.encryptedData, iv: res.iv, code: code },
success: function (data) {

//4.解密成功后 获取自己服务器返回的结果
if (data.data.status == 1) {
var userInfo_ = data.data.userInfo;
console.log(userInfo_)
} else {
console.log( '解密失败')
}
},
fail: function () {
console.log( '系统错误')
}
})
},
fail: function () {
console.log( '获取用户信息失败')
}
})
} else {
console.log( '获取用户登录态失败!' + r.errMsg)
}
},
fail: function () {
console.log( '登陆失败')
}
})


java后台:我是用ssm搭的框架

spring+springMVC+mybatis+sqlserver

先上controller的代码:

@ResponseBody
@RequestMapping(value = "/decodeUserInfo", method = RequestMethod.GET)
public Map decodeUserInfo(String encryptedData, String iv, String code) {

    Map map = new HashMap();
    //登录凭证不能为空
    if (code == null || code.length() == 0) {
        map.put("status", 0);
        map.put("msg", "code 不能为空");
        return map;
    }

    //小程序唯一标识   (在微信小程序管理后台获取)
    String wxspAppid = "***********************;
    //小程序的 app secret (在微信小程序管理后台获取)
    String wxspSecret = "************************";
    //授权(必填)
    String grant_type = "***************************";


    //////////////// 1、向微信服务器 使用登录凭证 code 获取 session_key 和 openid ////////////////
    //请求参数
    String params = "appid=" + wxspAppid + "&secret=" + wxspSecret + "&js_code=" + code + "&grant_type=" + grant_type;
    //发送请求
    String sr = HttpRequest.sendGet("https://api.weixin.qq.com/sns/jscode2session", params);
    //解析相应内容(转换成json对象)
    JSONObject json = JSONObject.fromObject(sr);
    //获取会话密钥(session_key)
    String session_key = json.get("session_key").toString();
    //用户的唯一标识(openid)
    String openid = (String) json.get("openid");

    //////////////// 2、对encryptedData加密数据进行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 = JSONObject.fromObject(result);
            Map userInfo = new HashMap();
            userInfo.put("openId", userInfoJSON.get("openId"));
            userInfo.put("nickName", userInfoJSON.get("nickName"));
            userInfo.put("gender", userInfoJSON.get("gender"));
            userInfo.put("city", userInfoJSON.get("city"));
            userInfo.put("province", userInfoJSON.get("province"));
            userInfo.put("country", userInfoJSON.get("country"));
            userInfo.put("avatarUrl", userInfoJSON.get("avatarUrl"));
            userInfo.put("unionId", userInfoJSON.get("unionId"));
            map.put("userInfo", userInfo);
            return map;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    map.put("status", 0);
    map.put("msg", "解密失败");
    return map;
}


解密工具包AesCbcUtil.class

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package com.zking.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;

public class AesCbcUtil {

    static {
        //BouncyCastle是一个开源的加解密解决方案,主页在http://www.bouncycastle.org/
        Security.addProvider(new BouncyCastleProvider());
    }

    /**
     * AES解密
     *
     * @param data           //密文,被加密的数据
     * @param key            //秘钥
     * @param iv             //偏移量
     * @param encodingFormat //解密后的结果需要进行的编码
     * @return
     * @throws Exception
     */
    public static String decrypt(String data, String key, String iv, String encodingFormat) throws Exception {
//        initialize();

        //被加密的数据
        byte[] dataByte = Base64.decodeBase64(data.getBytes());
        //加密秘钥
        byte[] keyByte = Base64.decodeBase64(key.getBytes());
        //偏移量
        byte[] ivByte = Base64.decodeBase64(iv.getBytes());


        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;
    }

}
请求包HttpRequest
HttpRequest

package com.zking.util;
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;

public class HttpRequest {

    public static void main(String[] args) {
        //发送 GET 请求
        String s=HttpRequest.sendGet("http://v.qq.com/x/cover/kvehb7okfxqstmc.html?vid=e01957zem6o", "");
        System.out.println(s);

//        //发送 POST 请求
//        String sr=HttpRequest.sendPost("http://www.toutiao.com/stream/widget/local_weather/data/?city=%E4%B8%8A%E6%B5%B7", "");
//        JSONObject json = JSONObject.fromObject(sr);
//        System.out.println(json.get("data"));
    }

    /**
     * 向指定URL发送GET方法的请求
     *
     * @param url
     *            发送请求的URL
     * @param param
     *            请求参数,请求参数应该是 name1=value1&name2=value2 的形式。
     * @return URL 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param) {
        String result = "";
        BufferedReader in = null;
        try {
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection();
            // 设置通用的请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 建立实际的连接
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.out.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常!" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result;
    }

    /**
     * 向指定 URL 发送POST方法的请求
     *
     * @param url
     *            发送请求的 URL
     * @param param
     *            请求参数,请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常!"+e);
            e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(in!=null){
                    in.close();
                }
            }
            catch(IOException ex){
                ex.printStackTrace();
            }
        }
        return result;
    }
}

pom.xml的配置:要配置:rt.jar跟jce.jar都是在jdk/jre/lib里的,记得对应好路劲

<bootclasspath>${java.home}/jre/lib/rt.jar${path.separator}${java.home}/jre/lib/jce.jar</bootclasspath>

<build>
  <finalName>OneProject</finalName>
  <pluginManagement>
    <plugins>
      <plugin>
        <artifactId>maven-clean-plugin</artifactId>
        <version>3.0.0</version>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.pluginsgroupId</groupId>
        <artifactId>maven-compiler-pluginartifactId</artifactId>
        <version>2.5.1version</version>
      <configuration>
        <source>1.7source</source>
        <target>1.7target</target>
      <compilerArguments>
      <verbose />
      <bootclasspath>${java.home}/jre/lib/rt.jar${path.separator}${java.home}/jre/lib/jce.jar</bootclasspath>
     </compilerArguments>
      <encoding>utf-8encoding</encoding>
      </configuration>
     </plugin>
      <plugin>
        <artifactId>maven-resources-plugin</artifactId>
        <version>3.0.2</version>
      </plugin>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.7.0</version>
      </plugin>
      <plugin>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>2.20.1</version>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>3.2.0</version>
      </plugin>
      <plugin>
        <artifactId>maven-install-plugin</artifactId>
        <version>2.5.2</version>
      </plugin>
      <plugin>
        <artifactId>maven-deploy-plugin</artifactId>
        <version>2.8.2</version>
      </plugin>
    </plugins>
  </pluginManagement>
  <resources>
    <resource>
      <directory>src/main/java</directory>
      <includes>
        <include>**/*.xml</include>
      </includes>
    </resource>
  </resources>
</build>


这里可能还会报406错误,主要是因为返回结果类型的问题

所以得在springmvc.xml中配置

<context:annotation-config />
<mvc:annotation-driven />

这样就可以了,然后我们去小程序控制台看返回结果


这样就大功告成了!








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