方法一：采用设置系统属性
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(https)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，对于https的，直接设置成如下方式：
prop.setProperty("proxyHost", "183.45.78.31");
prop.setProperty("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"));
// 请求地址：
URL url = new URL("http://www.baidu.com");
URLConnection connection = url.openConnection();
URLConnection connection = url.openConnection();
BufferedReader in = new BufferedReader( new InputStreamReader(connection.getInputStream()));
String inputLine;
while (
(inputLine = in.readLine()) != null) {
System.out.println(inputLine);
}
while (
(inputLine = in.readLine()) != null) {
System.out.println(inputLine);
}
}
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());
}
}
}
方法二：使用Proxy
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());
}
}
}