如何基于http代理解决Java固定ip问题

[root@localhost ~]# service privoxy status
Redirecting to /bin/systemctl status privoxy.service
● privoxy.service - Privoxy Web Proxy With Advanced Filtering Capabilities
  Loaded: loaded (/usr/lib/systemd/system/privoxy.service; disabled; vendor preset: disabled)
  Active: active (running) since Wed 2020-03-04 17:38:26 CST; 5s ago
 Process: 23138 ExecStart=/usr/sbin/privoxy --pidfile /run/privoxy.pid --user privoxy /etc/privoxy/config (code=exited, status=0/SUCCESS)
 Main PID: 23139 (privoxy)
  Memory: 872.0K
  CGroup: /system.slice/privoxy.service
      └─23139 /usr/sbin/privoxy --pidfile /run/privoxy.pid --user privox...

Mar 04 17:38:25 localhost.localdomain systemd[1]: Starting Privoxy Web Proxy ...
Mar 04 17:38:26 localhost.localdomain systemd[1]: Started Privoxy Web Proxy W...
Hint: Some lines were ellipsized, use -l to show in full.
[root@localhost ~]# netstat -anop | grep 8118
tcp    0   0 0.0.0.0:8118      0.0.0.0:*        LISTEN   23139/privoxy    off (0.00/0/0)
tcp    0   0 172.16.1.120:8311    172.16.1.123:28118   ESTABLISHED 15519/nginx: worker off (0.00/0/0)

HttpPost httpPost = new HttpPost(url);
//设置代理IP，设置连接超时时间 、 设置 请求读取数据的超时时间 、 设置从connect Manager获取Connection超时时间、
HttpHost proxy = new HttpHost("172.16.1.120",8118);
RequestConfig requestConfig = RequestConfig.custom()
  .setProxy(proxy)
  .setConnectTimeout(10000)
  .setSocketTimeout(10000)
  .setConnectionRequestTimeout(3000)
  .build();
httpPost.setConfig(requestConfig);