微信公众号开发（3）——获取access_token

蔚落 2022-04-01 09:58 470阅读 0赞

接上面几讲内容：

[微信公众号开发（1）——服务器配置][1]

[微信公众号开发（2）——文本消息、图文消息发送][2]

获取Access\_token的微信公众平台文档：

[https://mp.weixin.qq.com/wiki?t=resource/res\_main&id=mp1421140183][https_mp.weixin.qq.com_wiki_t_resource_res_main_id_mp1421140183]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70][]

要先将自己的ip放入ip白名单中，

参考文章：

[IP白名单添加了当前IP，获取access\_token时依然报出错误码40164的坑][IP_IP_access_token_40164]

注意在浏览器中输入URL，URL中替换掉自己的APPID和APPSECRET，直接访问也可测试是否获取access\_token

代码测试如下：

AccessToken类：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70 1][]

package com.imooc.po;
    
    public class AccessToken {
    
    	private String token;
    	private int expiresIn;
    	public String getToken() {
    		return token;
    	}
    	public void setToken(String token) {
    		this.token = token;
    	}
    	public int getExpiresIn() {
    		return expiresIn;
    	}
    	public void setExpiresIn(int expiresIn) {
    		this.expiresIn = expiresIn;
    	}
    	
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70 2][]

package com.imooc.util;
    
    import java.io.IOException;
    
    import org.apache.http.HttpEntity;
    import org.apache.http.HttpResponse;
    import org.apache.http.client.ClientProtocolException;
    import org.apache.http.client.methods.HttpGet;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.entity.StringEntity;
    import org.apache.http.impl.client.DefaultHttpClient;
    import org.apache.http.util.EntityUtils;
    
    import com.imooc.po.AccessToken;
    
    import net.sf.json.JSONObject;
    
    public class WeixinUtil {
    
    	private static final String APPID="wxfc73577ca8460519";
    	private static final String APPSECRET="b0b75d65ccb882f8b5526538b48121cb";
    	private static final String ACCESS_TOKEN_URL="https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";
    	
    	/**
    	 * get请求
    	 * @param url
    	 * @return
    	 */
    	public static JSONObject doGetStr(String url) {
    		DefaultHttpClient httpClient=new DefaultHttpClient();
    		HttpGet httpGet=new HttpGet(url);
    		JSONObject jsonObject=null;
    		
    		try {
    			HttpResponse response=httpClient.execute(httpGet);
    			HttpEntity entity=response.getEntity();
    			if(entity!=null) {
    				String result=EntityUtils.toString(entity,"utf-8");
    				jsonObject=JSONObject.fromObject(result);
    				
    			}
    		} catch (ClientProtocolException e) {
    			e.printStackTrace();
    		} catch (IOException e) {
    			e.printStackTrace();
    		}
    		return jsonObject;
    	}
    	
    	
    	/**
    	 * post请求
    	 * @param url
    	 * @param outStr
    	 * @return
    	 */
    	public static JSONObject doPostStr(String url,String outStr){
    		DefaultHttpClient httpClient=new DefaultHttpClient();
    		HttpPost httpPost=new HttpPost(url);
    		JSONObject jsonObject=null;
    		
    		try {
    			httpPost.setEntity(new StringEntity(outStr,"utf-8"));
    			HttpResponse response=httpClient.execute(httpPost);
    			String result=EntityUtils.toString(response.getEntity(),"utf-8");
    			jsonObject=JSONObject.fromObject(result);
    		}catch (Exception e) {
    				e.printStackTrace();
    			}
    		
    		
    		return jsonObject;
    	}
    	
    	
    	/**
    	 * 
    	 * 获取access_token
    	 * @return
    	 */
    	public static AccessToken getAccessToken() {
    		AccessToken token=new AccessToken();
    		String url=ACCESS_TOKEN_URL.replace("APPID",APPID ).replace("APPSECRET",APPSECRET);
    		JSONObject jsonObject= doGetStr(url);
    		if(jsonObject!=null) {
    			if(jsonObject.containsKey("access_token")) {	
    				token.setToken(jsonObject.getString("access_token"));
    				token.setExpiresIn(jsonObject.getInt("expires_in"));
    			}else {
    				System.out.println("获取access_token失败");
    			}
    		}
    		return token;
    	}
    }

测试是否获取到微信服务器的AccessToken:

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70 3][]

package com.imooc.test;
    
    
    import com.imooc.po.AccessToken;
    import com.imooc.util.WeixinUtil;
    
    public class WeixinTest {
    
    	public static void main(String[] args) {
    		
    	AccessToken token=WeixinUtil.getAccessToken();
    	System.out.println("票据："+token.getToken());
    	System.out.println("有效时间:"+token.getExpiresIn());
    	}
    }

运行结果：

![20181230105817685.png][]

[1]: https://blog.csdn.net/yongbutingxide/article/details/85370735
[2]: https://blog.csdn.net/yongbutingxide/article/details/85372190
[https_mp.weixin.qq.com_wiki_t_resource_res_main_id_mp1421140183]: https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1421140183
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70]: /images/20220401/23140e83fa8a4296940a49d90f923561.png
[IP_IP_access_token_40164]: https://www.cnblogs.com/murenziwei/p/10179390.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70 1]: /images/20220401/8150bd093e444bf3925582ce2cac022f.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70 2]: /images/20220401/f7595dda283a41c8aa0bf7112819fff4.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvbmdidXRpbmd4aWRl_size_16_color_FFFFFF_t_70 3]: /images/20220401/c4571e0adb6845309f293461818af128.png
[20181230105817685.png]: /images/20220401/ce57dea083e14fb6b16263596678cdf7.png