java implement ip proxy: Java program to set up HTTP/Socks5 proxy tutorial

Hands-on teaching you to use Java to get proxy IP

Recently, a lot of small partners are asking, Java program how the whole proxy IP, today we will break open the rubbing said, with the most grounded way to understand. Whether doing data collection or interface debugging, proxy IP is a good thing, can help us solve a lot of practical problems.

System Global Proxy Setting Method

Let's start with the simplest global proxy configuration, which is suitable for cases where you need all network requests to go through the proxy. Add these lines of code to the main method and you're done:

System.setProperty("http.proxyHost", "121.36.77.201");
System.setProperty("http.proxyPort", "8080");
System.setProperty("http.proxyHost", "121.36.77.201"); System.setProperty("http.proxyHost", "121.36.77.201");
System.setProperty("https.proxyPort", "8080");

Here's something to keep in mind.Don't misspell the port number.The HTTP and HTTPS protocols should be set up separately. If the proxy needs authentication, you have to use the following Authenticator:

Authenticator.setDefault(new Authenticator() {
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication("Username", "Password".toCharArray()); }
    }
});

Single Request Proxy Configuration

There are times when we only need a specific request to go to the proxy, which is recommended to use OkHttpClient:

Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("121.36.77.201", 8080));
OkHttpClient client = new OkHttpClient.Builder()
        .proxy(proxy)
        .build();

这样配置后，只有用这个client对象发起的请求才会走代理，其他请求还是。特别适合需要Dynamic switching agentsThe Scene.

How does the Socks5 proxy work?

Many proxy providers now support the Socks5 protocol, with slightly different configuration methods:

System.setProperty("socksProxyHost", "121.36.77.201");
System.setProperty("socksProxyPort", "1080");

如果遇到连接超时的情况，记得检查下防火代理设置。用ipipgo的Socks5代理时，他们提供Client-side one-click configurationfunction, which is a lot less work than setting it up manually.

How to choose a proxy IP service provider?

Recommended for ipipgoDynamic Residential (Corporate) PackageThe IP pool of their family is updated quickly, and the success rate can reach more than 98%. Especially to praise is their API extraction function, directly to the code example of this point is too much trouble.

Frequently Asked Questions QA

Q: What should I do if the proxy doesn't take effect after I set it?
A: First check the IP and port are correct, and then use online tools to test the proxy availability. It is recommended to use ipipgo's client with its own testing function.

Q: What should I do if my agent is slow?
A: ① change the geographic location of the node closer ② check the program whether there is resource leakage ③ upgrade to a dedicated IP packages

Q: What if I need to switch IP frequently?
A: It is recommended to use ipipgo's API to get IP dynamically, they support thevolumetric billingMode, use as much as you can

Lastly, I would like to remind you that you should not just look at the price when choosing a proxy service. A company like ipipgo can provide1v1 Customized Solutions的服务商，遇到复杂业务场景时能省不少心。他们技术支持响应快，上次我半夜提工单居然10分钟就回复了，这点确实要。