分享java中设置代理的两种方式

import java.net.Authenticator;
import java.net.PasswordAuthentication;
import java.util.Properties;
 
public class ProxyDemo1 {
  public static void main(String[] args) {
    Properties prop = System.getProperties();
    // 设置http访问要使用的代理服务器的地址
    prop.setProperty("http.proxyHost", "183.45.78.31");
    // 设置http访问要使用的代理服务器的端口
    prop.setProperty("http.proxyPort", "8080");
    // 设置不需要通过代理服务器访问的主机，可以使用*通配符，多个地址用|分隔
    prop.setProperty("http.nonProxyHosts", "localhost|192.168.0.*");
    // 设置安全访问使用的代理服务器地址与端口
    // 它没有https.nonProxyHosts属性，它按照http.nonProxyHosts 中设置的规则访问
    prop.setProperty("https.proxyHost", "183.45.78.31");
    prop.setProperty("https.proxyPort", "443");
    // 使用ftp代理服务器的主机、端口以及不需要使用ftp代理服务器的主机
    prop.setProperty("ftp.proxyHost", "183.45.78.31");
    prop.setProperty("ftp.proxyPort", "21");
    prop.setProperty("ftp.nonProxyHosts", "localhost|192.168.0.*");
    // socks代理服务器的地址与端口
    prop.setProperty("socksProxyHost", "183.45.78.31");
    prop.setProperty("socksProxyPort", "1080");
    // 设置登陆到代理服务器的用户名和密码
    Authenticator.setDefault(new MyAuthenticator("userName", "Password"));
  }
 
  static class MyAuthenticator extends Authenticator {
    private String user = "";
    private String password = "";
 
    public MyAuthenticator(String user, String password) {
      this.user = user;
      this.password = password;
    }
 
    protected PasswordAuthentication getPasswordAuthentication() {
      return new PasswordAuthentication(user, password.toCharArray());
    }
  }
 
}

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.Authenticator;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.PasswordAuthentication;
import java.net.Proxy;
import java.net.URL;
 
public class ProxyDemo2 {
  public static void main(String[] args) throws Exception {
    URL url = new URL("http://www.3lai8.com");
    // /创建代理服务器
    InetSocketAddress addr = new InetSocketAddress("192.168.0.254", 8080);
    // Proxy proxy = new Proxy(Proxy.Type.SOCKS, addr); // Socket 代理
    Proxy proxy = new Proxy(Proxy.Type.HTTP, addr); // http 代理
    Authenticator.setDefault(new MyAuthenticator("username", "password"));// 设置代理的用户和密码
    HttpURLConnection connection = (HttpURLConnection) url.openConnection(proxy);// 设置代理访问
    InputStreamReader in = new InputStreamReader(connection.getInputStream());
    BufferedReader reader = new BufferedReader(in);
    while (true) {
      String s = reader.readLine();
      if (s != null) {
        System.out.println(s);
      }
    }
  }
 
  static class MyAuthenticator extends Authenticator {
    private String user = "";
    private String password = "";
 
    public MyAuthenticator(String user, String password) {
      this.user = user;
      this.password = password;
    }
 
    protected PasswordAuthentication getPasswordAuthentication() {
      return new PasswordAuthentication(user, password.toCharArray());
    }
  }
 
}