微博登录

基本流程

1. 引导需要授权的用户到如下地址：
https://api.weibo.com/oauth2/authorize?client_id=YOUR_CLIENT_ID&response_type=code&redirect_uri=YOUR_REGISTERED_REDIRECT_URI

2. 如果用户同意授权,页面跳转至 YOUR_REGISTERED_REDIRECT_URI/?code=CODE

3. 换取Access Token
https://api.weibo.com/oauth2/access_token?client_id=YOUR_CLIENT_ID&client_secret=YOUR_CLIENT_SECRET&grant_type=authorization_code&redirect_uri=YOUR_REGISTERED_REDIRECT_URI&code=CODE
（其中client_id=YOUR_CLIENT_ID&client_secret=YOUR_CLIENT_SECRET可以使用basic方式加入header中）

返回值
{ "access_token":"SlAV32hkKG", "remind_in ":3600, "expires_in":3600 }

4. 使用获得的OAuth2.0 Access Token调用API

<a href="https://api.weibo.com/oauth2/authorize?client_id=2516535588&response_type=code&redirect_uri=http://1.itliucheng.sinaapp.com/account/weibo.action">新浪微博登录</a>

action 中

@Action("weibo")
    public String weibo(){
        account = accountService.weiboLogin(code);
        return SUCCESS;
    }

service中,使用了工具类 

public Account weiboLogin(String code) {
        String url = "https://api.weibo.com/oauth2/access_token";
        Map<String, String> params = new HashMap<String, String>();
        
        params.put("client_id","2516535588");
        params.put("client_secret","6e90457ae89ff3c2d4c0eae0f04194e1");
        params.put("grant_type","authorization_code");
        params.put("code",code);
        params.put("redirect_uri","http://1.itliucheng.sinaapp.com");
        
        String json = HttpUtil.sendPostRequest(url, params);
        
        HashMap<String, Object> map = new Gson().fromJson(json, HashMap.class);
        String accessToken = (String) map.get("access_token");
        String uid = (String) map.get("uid");
        
        String userInfoUrl = "https://api.weibo.com/2/users/show.json?access_token="+accessToken+"&uid="+uid;
        
        json = HttpUtil.sendGetRequest(userInfoUrl);
        
        map = new Gson().fromJson(json, HashMap.class);
        
        Account account = new Account();
        account.setUsername(map.get("screen_name").toString());
        account.setPic(map.get("avatar_large").toString());
        account.setWeibotoken(accessToken);
        account.setWeibouid(uid);
        
        accountDao.save(account);
        
        account = accountDao.findByUsername(account.getUsername());
        
        return account;
        
        
    }
    

使用的工具类 

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.3.3</version>
</dependency>

public class HttpUtil {

    private static Logger log = Logger.getLogger(HttpUtil.class);
    
    public static String sendPostRequest(String url,Map<String, String> params) {
        String result = null;
        
        CloseableHttpClient client = HttpClients.createDefault();
        HttpPost post = new HttpPost(url);
        
        List<NameValuePair> list = new ArrayList<NameValuePair>();
        for (Entry<String, String> entry : params.entrySet()) {
            list.add(new BasicNameValuePair(entry.getKey(),entry.getValue()));
        }
        
        CloseableHttpResponse resp = null;
        try {
            post.setEntity(new UrlEncodedFormEntity(list));
            
            resp = client.execute(post);
            
            if(resp.getStatusLine().getStatusCode() == 200) {
                InputStream input = resp.getEntity().getContent();
                result = IOUtils.toString(input,"UTF-8");
                input.close();
            } else {
                log.debug("请求"+url+"错误");
            }
            
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if(resp != null) {
                    resp.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    client.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        
        return result;
    }


    public static String sendGetRequest(String url) {
        String result = null;
        
        CloseableHttpClient client = HttpClients.createDefault();
        HttpGet get = new HttpGet(url);
        
        
        CloseableHttpResponse resp = null;
        try {
            
            resp = client.execute(get);
            
            if(resp.getStatusLine().getStatusCode() == 200) {
                InputStream input = resp.getEntity().getContent();
                result = IOUtils.toString(input,"UTF-8");
                input.close();
            } else {
                log.debug("请求"+url+"错误");
            }
            
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if(resp != null) {
                    resp.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    client.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        
        return result;
    }





}