OAuth授权

依赖工具类关键代码(以gitee为例)==还不理解的去看 [官方文档](https://gitee.com/api/v5/oauth_doc#/)==

依赖

        
            org.projectlombok
            lombok
        
        
            org.apache.httpcomponents
            httpclient
            4.5.6
        
        
        
            com.alibaba
            fastjson
            1.2.51
        

        
            commons-io
            commons-io
            2.6
        
        
            commons-lang
            commons-lang
            2.6
        

        
        
            com.google.code.gson
            gson
            2.8.5

工具类

package com.ljh;
 
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;
 

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 params) throws ConnectTimeoutException,
			SocketTimeoutException, Exception {
		return postForm(url, params, null, connTimeout, readTimeout);
	}
 
	public static String postParameters(String url, Map 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);
	}
 
	
	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;
	}
 
 
	
	public static String postForm(String url, Map params, Map headers, Integer connTimeout,Integer readTimeout) throws ConnectTimeoutException,
			SocketTimeoutException, Exception {
 
		HttpClient client = null;
		HttpPost post = new HttpPost(url);
		try {
			if (params != null && !params.isEmpty()) {
				List formParams = new ArrayList();
				Set> entrySet = params.entrySet();
				for (Entry 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 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();
			}
		}
	}
 
 
 
 
	
	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;
	}
 
 
	
	@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;
	}
 
 
 
	
	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");
            
			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();
		}
	}
 
}

关键代码(以gitee为例)

package com.ljh.controller;

import com.google.gson.Gson;
import com.ljh.HttpClientUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;


@Controller
@Slf4j
public class TestController {
    
    @GetMapping
    public String login(){
        return "redirect:https://gitee.com/oauth/authorize?client_id=1cc53d5bffa15f75e8633e2213481554a6f7e1ed52e47f0dcdeee6d04b2ecc57&redirect_uri=http://106.14.223.42:8084/callback&response_type=code";
    }

    @RequestMapping("/callback")
    @ResponseBody
    public String callback(String code) throws Exception {
        //由于确定登陆会回调该方法且携带一个code在地址栏，我们可以通过参数的方式获取
        //或者使用HttpServletRequest注入的方式去获取
        log.info("进入回调");
        log.info("获取code{}",code);
        //获取令牌参数
        String body="grant_type=authorization_code&code="+code+
                "&client_id=1cc53d5bffa15f75e8633e2213481554a6f7e1ed52e47f0dcdeee6d04b2ecc57"+
                "&redirect_uri=http://106.14.223.42:8084/callback"+
                "&client_secret=2cd54587fc60ccd9447c905e523601aff11a056b02c324042a1ab300d17bbe94";
        log.info("发送获取令牌请求");
        String s="";
        try {
            s = HttpClientUtils.post("https://gitee.com/oauth/token",body,"application/x-www-form-urlencoded","utf-8",30000,30000);
        } catch (Exception e) {
            log.error("获取令牌失败{}",e.getMessage());
        }
        log.info("获取令牌请求的返回值{}",s);
        //这里需要注意一下，发送的是post请求，第三个参数mimeType,我使用的是application/x-www-form-urlencoded，数据按照 key1=val1&key2=val2 的方式进行编码，key 和 val 都进行了 URL 转码，数据放在body里
        //使用gson的方式去解析返回的内容
        Gson gson = new Gson();
        HashMap hashMap = gson.fromJson(s, HashMap.class);
        String access_token = (String)hashMap.get("access_token");
        log.info("令牌:{}",access_token);
        System.out.println(s);
        //获取用户信息需要携带token就可以了，其他第三方登陆可能需要携带用户id,主要看文档
        log.info("获取用户信息");
        String s2 = HttpClientUtils.get("https://gitee.com/api/v5/user?access_token=" + access_token);
        log.info("用户信息{}",s2);
        return s2;
    }
}

还不理解的去看官方文档

OAuth授权

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