标签：集成 String 登录 url 微信 client org import null

微信登录流程：

微信官方参考文档：

https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=open1419316505&token=e547653f995d8f402704d5cb2945177dc8aa4e7e&lang=zh_CN

1.在配置文件中添加需要的参数（该参数需要去https://open.weixin.qq.com/通过开发者资格认证等流程申请）

# 微信开放平台 appid
wx.open.app_id=你的appid
# 微信开放平台 appsecret
wx.open.app_secret=你的app密钥
# 微信开放平台 重定向url
wx.open.redirect_url=你的重定向url

2.创建工具类读取配置文件的参数

import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

@Component
//读取配置文件中关于微信登录的信息
public class ConstantPropertiesUtil implements InitializingBean {

    @Value("${wx.open.app_id}")
    private String appId;
    @Value("${wx.open.app_secret}")
    private String appSecret;
    @Value("${wx.open.redirect_url}")
    private String redirectUrl;

    public static String WX_OPEN_APP_ID;
    public static String WX_OPEN_APP_SECRET;
    public static String WX_OPEN_REDIRECT_URL;
    @Override
    public void afterPropertiesSet() throws Exception {
     WX_OPEN_APP_ID = this.appId  ;
     WX_OPEN_APP_SECRET = this.appSecret;
     WX_OPEN_REDIRECT_URL =this.redirectUrl;
    }
}

3.创建controller

要想实现微信登录，首先要有微信提供的二维码，Controller中生成二维码的方法为getWxCode()，实现方式是拼接出微信官方特定格式的url（官方文档），然后去访问它。其中对于重定向url需要进行urlEncode编码。拼接方式采用占位符的思想，然后使用String类中的方法format（）得到最后的url并返回。

当你访问这个接口并使用微信扫一扫登录后，地址栏会变成

http://localhost:8150/api/ucenter/wx/callback?code=001IsvFa1VLKrA0FTcIa1DYMa10IsvFa&state=renzhe

两个参数

code：包含用户信息

state：自定义信息

一个端口，一个方法（获取用户信息的方法）

8150，callback（重定向的url中自定义的）

所以controller中还会定义一个获取用户信息的接口getback()，当你扫完二维码并确定登录后返回的url则会继续执行callback()方法，在callback中获取两个值，code+state，code也叫授权临时票据，然后通过code值请求微信提供的固定url（https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code 参数值写自己的），通过httpclient会返回两个值，access_token(访问凭证)+openid(每个微信唯一的标识)，例如：

{"access_token":"41_xexDMUnJWVLK4WdbF02J1-YIu7a6PxNouTlJ_Or9YFYSXCKeD0zu0yM9CAPJvnqTLNXCO4Ij9NuTKIKdQYB47w1yfDYJoVhQNlNSsduHR-k","expires_in":7200,"refresh_token":"41_3OuyVF2OwQGyqgt6CQXmxAKgzYjm6eDyw-NK4kvPhoKbjTUIL_gREUpcqJ4nYZHI3aXLFkjFepg4GScvKrGQVoD4KJqL6oZlBcZYFdN7Iww","openid":"o3_SC51xq5wTbiDADDKAJbJw5cH4","scope":"snsapi_login","unionid":"oWgGz1AMXbZaembWG-3jBmBMyDZc"}

然后拿着这两个值再通过httpclient去请求一个微信提供的固定地址（https://api.weixin.qq.com/sns/auth?access_token=ACCESS_TOKEN&openid=OPENID），最终可以得到微信扫描人的信息，比如微信昵称，微信头像等。例如：

{"openid":"o3_SC51xq5wTbiDADDKAJbJw5cH4","nickname":"俟","sex":1,"language":"zh_CN","city":"Taiyuan","province":"Shanxi","country":"CN","headimgurl":"https:\/\/thirdwx.qlogo.cn\/mmopen\/vi_32\/Q0j4TwGTfTIZwLRHYxkV7v2CiciasMFpe65cvibs6xU95pGiavE082SKG6mbB2mibLedTgDnBQ9pPygK2CStv40uHicQ\/132","privilege":[],"unionid":"oWgGz1AMXbZaembWG-3jBmBMyDZc"}

　

@Controller
@RequestMapping("/api/ucenter/wx")
@CrossOrigin
public class WxApiController {

    //1.请求微信二维码
    @GetMapping("login")
    public String getWxCode() {

        //固定地址 后面拼接参数 %s相当于占位符
        String baseUrl = "https://open.weixin.qq.com/connect/qrconnect" +
                "?appid=%s"+
                "&redirect_uri=%s"+
                "&response_type=code" +
                "&scope=snsapi_login"+
                "&state=%s"+
                "#wechat_redirect";
        //对redirect_url进行urlEncode编码
        String redirectUrl = ConstantPropertiesUtil.WX_OPEN_REDIRECT_URL;
        try {
            redirectUrl = URLEncoder.encode(redirectUrl, "UTF-8"); //url编码
        }catch (Exception e){
            throw new GuliException(20001, e.getMessage());
        }
        String url = String.format(
                baseUrl,
                ConstantPropertiesUtil.WX_OPEN_APP_ID,
                redirectUrl,
                "renzhe"
        );

        //重定向到请求微信地址
        return "redirect:"+url;
    }
     //获取用户信息
    @GetMapping("callback")
    public String callback(String code,String state){
        try{
            //1.获取code值，临时票据，类似于验证码
            //2.拿着code请求微信地址，得到两个值 access_token+openid
            String baseAccessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token" +
                    "?appid=%s" +
                    "&secret=%s" +
                    "&code=%s" +
                    "&grant_type=authorization_code";
            String accessTokenUrl = String.format(baseAccessTokenUrl,
                    ConstantPropertiesUtil.WX_OPEN_APP_ID,
                    ConstantPropertiesUtil.WX_OPEN_APP_SECRET,
                    code);
            //请求这个拼接好的地址，最后返回两个参数access_token+openid 使用httpclient请求
            String accessTokenInfo = HttpClientUtils.get(accessTokenUrl);
            //解析json字符串 将其字符串转换成字符串 使其可以取值
            Gson gson = new Gson();
            HashMap map = gson.fromJson(accessTokenInfo, HashMap.class);
            String access_token = (String)map.get("access_token");
            String openid = (String)map.get("openid");

            //把扫描人的信息添加到数据库中
            //判断数据库中是否存在相同微信信息，根据openid判断
            UcenterMember member = memberService.getOpenIdMember(openid);
            if(member == null){//表中无数据
                //3.拿着access_token和openid，再去请求微信提供的固定地址，获取扫描人的信息
                String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo?" +
                        "access_token=%s" +
                        "&openid=%s";
                //拼接两个参数
                String baseUserInfo = String.format(baseUserInfoUrl, access_token, openid);
                //使用httpclient去请求这个地址
                String userInfo = HttpClientUtils.get(baseUserInfo);
                //解析json字符串
                HashMap<String,Object> userMap = gson.fromJson(userInfo, HashMap.class);
                String nickname = (String)userMap.get("nickname");
                //微信头像
                String headimgurl = (String)userMap.get("headimgurl");

                member = new UcenterMember();
                member.setOpenid(openid);
                member.setNickname(nickname);
                member.setAvatar(headimgurl);
                memberService.save(member);

            }
            //因为cookie不能跨域，所有这个用户信息不准备放入cookie中,而是放入路径中
            //使用jwt根据member对象生成一个token字符串
            String token = JwtUtils.getJwtToken(member.getId(), member.getNickname());
            //最后，返回首页面，并通过路径传递token字符串
            return "redirect:http://localhost:3000?token="+token;
        }catch (Exception e){
           throw new GuliException(20001,"登录失败");
        }

    }

}

技术点：

（1）httpclient：使用它去请求地址然后得到结果，不需要从浏览器输入url也能得到结果。httpclient工具类 主要方法为get，post方法

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.config.RequestConfig.Builder;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContextBuilder;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.conn.ssl.X509HostnameVerifier;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;

import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;
import java.io.IOException;
import java.net.SocketTimeoutException;
import java.security.GeneralSecurityException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

/**
 *  依赖的jar包有：commons-lang-2.6.jar、httpclient-4.3.2.jar、httpcore-4.3.1.jar、commons-io-2.4.jar
 * @author zhaoyb
 *
 */
public class HttpClientUtils {

	public static final int connTimeout=10000;
	public static final int readTimeout=10000;
	public static final String charset="UTF-8";
	private static HttpClient client = null;

	static {
		PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
		cm.setMaxTotal(128);
		cm.setDefaultMaxPerRoute(128);
		client = HttpClients.custom().setConnectionManager(cm).build();
	}

	public static String postParameters(String url, String parameterStr) throws ConnectTimeoutException, SocketTimeoutException, Exception{
		return post(url,parameterStr,"application/x-www-form-urlencoded",charset,connTimeout,readTimeout);
	}

	public static String postParameters(String url, String parameterStr,String charset, Integer connTimeout, Integer readTimeout) throws ConnectTimeoutException, SocketTimeoutException, Exception{
		return post(url,parameterStr,"application/x-www-form-urlencoded",charset,connTimeout,readTimeout);
	}

	public static String postParameters(String url, Map<String, String> params) throws ConnectTimeoutException,
			SocketTimeoutException, Exception {
		return postForm(url, params, null, connTimeout, readTimeout);
	}

	public static String postParameters(String url, Map<String, String> params, Integer connTimeout,Integer readTimeout) throws ConnectTimeoutException,
			SocketTimeoutException, Exception {
		return postForm(url, params, null, connTimeout, readTimeout);
	}

	public static String get(String url) throws Exception {
		return get(url, charset, null, null);
	}

	public static String get(String url, String charset) throws Exception {
		return get(url, charset, connTimeout, readTimeout);
	}

	/**
	 * 发送一个 Post 请求, 使用指定的字符集编码.
	 *
	 * @param url
	 * @param body RequestBody
	 * @param mimeType 例如 application/xml "application/x-www-form-urlencoded" a=1&b=2&c=3
	 * @param charset 编码
	 * @param connTimeout 建立链接超时时间,毫秒.
	 * @param readTimeout 响应超时时间,毫秒.
	 * @return ResponseBody, 使用指定的字符集编码.
	 * @throws ConnectTimeoutException 建立链接超时异常
	 * @throws SocketTimeoutException  响应超时
	 * @throws Exception
	 */
	public static String post(String url, String body, String mimeType,String charset, Integer connTimeout, Integer readTimeout)
			throws ConnectTimeoutException, SocketTimeoutException, Exception {
		HttpClient client = null;
		HttpPost post = new HttpPost(url);
		String result = "";
		try {
			if (StringUtils.isNotBlank(body)) {
				HttpEntity entity = new StringEntity(body, ContentType.create(mimeType, charset));
				post.setEntity(entity);
			}
			// 设置参数
			Builder customReqConf = RequestConfig.custom();
			if (connTimeout != null) {
				customReqConf.setConnectTimeout(connTimeout);
			}
			if (readTimeout != null) {
				customReqConf.setSocketTimeout(readTimeout);
			}
			post.setConfig(customReqConf.build());

			HttpResponse res;
			if (url.startsWith("https")) {
				// 执行 Https 请求.
				client = createSSLInsecureClient();
				res = client.execute(post);
			} else {
				// 执行 Http 请求.
				client = HttpClientUtils.client;
				res = client.execute(post);
			}
			result = IOUtils.toString(res.getEntity().getContent(), charset);
		} finally {
			post.releaseConnection();
			if (url.startsWith("https") && client != null&& client instanceof CloseableHttpClient) {
				((CloseableHttpClient) client).close();
			}
		}
		return result;
	}


	/**
	 * 提交form表单
	 *
	 * @param url
	 * @param params
	 * @param connTimeout
	 * @param readTimeout
	 * @return
	 * @throws ConnectTimeoutException
	 * @throws SocketTimeoutException
	 * @throws Exception
	 */
	public static String postForm(String url, Map<String, String> params, Map<String, String> headers, Integer connTimeout,Integer readTimeout) throws ConnectTimeoutException,
			SocketTimeoutException, Exception {

		HttpClient client = null;
		HttpPost post = new HttpPost(url);
		try {
			if (params != null && !params.isEmpty()) {
				List<NameValuePair> formParams = new ArrayList<NameValuePair>();
				Set<Entry<String, String>> entrySet = params.entrySet();
				for (Entry<String, String> entry : entrySet) {
					formParams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
				}
				UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formParams, Consts.UTF_8);
				post.setEntity(entity);
			}

			if (headers != null && !headers.isEmpty()) {
				for (Entry<String, String> entry : headers.entrySet()) {
					post.addHeader(entry.getKey(), entry.getValue());
				}
			}
			// 设置参数
			Builder customReqConf = RequestConfig.custom();
			if (connTimeout != null) {
				customReqConf.setConnectTimeout(connTimeout);
			}
			if (readTimeout != null) {
				customReqConf.setSocketTimeout(readTimeout);
			}
			post.setConfig(customReqConf.build());
			HttpResponse res = null;
			if (url.startsWith("https")) {
				// 执行 Https 请求.
				client = createSSLInsecureClient();
				res = client.execute(post);
			} else {
				// 执行 Http 请求.
				client = HttpClientUtils.client;
				res = client.execute(post);
			}
			return IOUtils.toString(res.getEntity().getContent(), "UTF-8");
		} finally {
			post.releaseConnection();
			if (url.startsWith("https") && client != null
					&& client instanceof CloseableHttpClient) {
				((CloseableHttpClient) client).close();
			}
		}
	}




	/**
	 * 发送一个 GET 请求
	 *
	 * @param url
	 * @param charset
	 * @param connTimeout  建立链接超时时间,毫秒.
	 * @param readTimeout  响应超时时间,毫秒.
	 * @return
	 * @throws ConnectTimeoutException   建立链接超时
	 * @throws SocketTimeoutException   响应超时
	 * @throws Exception
	 */
	public static String get(String url, String charset, Integer connTimeout,Integer readTimeout)
			throws ConnectTimeoutException,SocketTimeoutException, Exception {

		HttpClient client = null;
		HttpGet get = new HttpGet(url);
		String result = "";
		try {
			// 设置参数
			Builder customReqConf = RequestConfig.custom();
			if (connTimeout != null) {
				customReqConf.setConnectTimeout(connTimeout);
			}
			if (readTimeout != null) {
				customReqConf.setSocketTimeout(readTimeout);
			}
			get.setConfig(customReqConf.build());

			HttpResponse res = null;

			if (url.startsWith("https")) {
				// 执行 Https 请求.
				client = createSSLInsecureClient();
				res = client.execute(get);
			} else {
				// 执行 Http 请求.
				client = HttpClientUtils.client;
				res = client.execute(get);
			}

			result = IOUtils.toString(res.getEntity().getContent(), charset);
		} finally {
			get.releaseConnection();
			if (url.startsWith("https") && client != null && client instanceof CloseableHttpClient) {
				((CloseableHttpClient) client).close();
			}
		}
		return result;
	}


	/**
	 * 从 response 里获取 charset
	 *
	 * @param ressponse
	 * @return
	 */
	@SuppressWarnings("unused")
	private static String getCharsetFromResponse(HttpResponse ressponse) {
		// Content-Type:text/html; charset=GBK
		if (ressponse.getEntity() != null  && ressponse.getEntity().getContentType() != null && ressponse.getEntity().getContentType().getValue() != null) {
			String contentType = ressponse.getEntity().getContentType().getValue();
			if (contentType.contains("charset=")) {
				return contentType.substring(contentType.indexOf("charset=") + 8);
			}
		}
		return null;
	}



	/**
	 * 创建 SSL连接
	 * @return
	 * @throws GeneralSecurityException
	 */
	private static CloseableHttpClient createSSLInsecureClient() throws GeneralSecurityException {
		try {
			SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {
				public boolean isTrusted(X509Certificate[] chain,String authType) throws CertificateException {
					return true;
				}
			}).build();

			SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, new X509HostnameVerifier() {

				@Override
				public boolean verify(String arg0, SSLSession arg1) {
					return true;
				}

				@Override
				public void verify(String host, SSLSocket ssl)
						throws IOException {
				}

				@Override
				public void verify(String host, X509Certificate cert)
						throws SSLException {
				}

				@Override
				public void verify(String host, String[] cns,
								   String[] subjectAlts) throws SSLException {
				}

			});

			return HttpClients.custom().setSSLSocketFactory(sslsf).build();

		} catch (GeneralSecurityException e) {
			throw e;
		}
	}

	public static void main(String[] args) {
		try {
			String str= post("https://localhost:443/ssl/test.shtml","name=12&page=34","application/x-www-form-urlencoded", "UTF-8", 10000, 10000);
			//String str= get("https://localhost:443/ssl/test.shtml?name=12&page=34","GBK");
            /*Map<String,String> map = new HashMap<String,String>();
            map.put("name", "111");
            map.put("page", "222");
            String str= postForm("https://localhost:443/ssl/test.shtml",map,null, 10000, 10000);*/
			System.out.println(str);
		} catch (ConnectTimeoutException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SocketTimeoutException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}

依赖：

             <dependency>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpclient</artifactId>
            </dependency>
            <dependency>
    			<groupId>commons-io</groupId>
    			<artifactId>commons-io</artifactId>
	    </dependency>

2）json转换工具：gson或者fastjson或者jackson　　 将其字符串转换成字符串 使其可以取值

             <dependency>
                <groupId>com.google.code.gson</groupId>
                <artifactId>gson</artifactId>    
             </dependency>

　　

　　

　　

　

标签：集成,String,登录,url,微信,client,org,import,null
来源： https://www.cnblogs.com/jamers-rz/p/14369562.html

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