java 代理访问 URLConnection

import java.io.BufferedInputStream;import java.io.FileOutputStream;import java.net.Authenticator;import java.net.PasswordAuthentication;import java.net.URL;import java.net.URLConnection;import java.util.Properties;import java.util.logging.Logger;import org.junit.Test;public class EclipseStart {private static final Logger logg = Logger.getLogger(EclipseStart.class.getName());private static final String username = "域\\用户";private static final String password = "密码";private static final String host = "ip";private static final String port = "端口";/** * 访问代理认证 */public static void initAuth() {Properties props = System.getProperties();props.setProperty("proxySet", "true");props.setProperty("http.proxyHost", host);props.setProperty("http.proxyPort", port);Authenticator.setDefault(new Authenticator() {protected PasswordAuthentication getPasswordAuthentication() {return new PasswordAuthentication(username,new String(password).toCharArray());}});}@Testpublic void test() {this.initAuth();logg.info(getHtmlShow("http://www.baidu.com"));System.out.println("fuck usa");getHtmlToSaveFile("http://www.baidu.com", "d:\\", "do.html");}/** * 获得指定地址的html代码 * @param address * @return */private static String getHtmlShow(String address) {StringBuffer html = new StringBuffer();String result = null;try {URL url = new URL(address);URLConnection conn = url.openConnection();conn.setRequestProperty("User-Agent","Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; GTB5; .NET CLR 2.0.50727; CIBA)");BufferedInputStream in = new BufferedInputStream(conn.getInputStream());try {String inputLine;byte[] buf = new byte[4096];int bytesRead = 0;while (bytesRead >= 0) {inputLine = new String(buf, 0, bytesRead, "ISO-8859-1");html.append(inputLine);bytesRead = in.read(buf);inputLine = null;}buf = null;} finally {in.close();conn = null;url = null;}result = new String(html.toString().trim().getBytes("ISO-8859-1"),"gb2312").toLowerCase();} catch (Exception e) {e.printStackTrace();return null;}html = null;return result;}/** * 获得指定地址的html代码 保存为文件 * @param address * @return */private static void getHtmlToSaveFile(String address,String path,String fileName) {try {URL url = new URL(address);URLConnection conn = url.openConnection();BufferedInputStream in = new BufferedInputStream(conn.getInputStream());FileOutputStream fs = new FileOutputStream(path+fileName);try {byte[] buf = new byte[1024];int bytesRead = 0;while ((bytesRead = in.read(buf)) != -1) {bytesRead += bytesRead;fs.write(buf); }logg.info(""+bytesRead);} finally {in.close();conn = null;url = null;}} catch (Exception e) {e.printStackTrace();}}}