java中如何根據(jù)一個(gè)網(wǎng)址獲得該網(wǎng)頁的源代碼？

package test;

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import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

public class HttpTest {

private String u;

private String encoding;

public static void main(String[] args) throws Exception {

HttpTest client = new HttpTest("", "UTF-8");

client.run();

}

public HttpTest(String u, String encoding) {

this.u = u;

this.encoding = encoding;

}

public void run() throws Exception {

URL url = new URL(u);// 根據(jù)鏈接（字符串格式），生成一個(gè)URL對(duì)象

HttpURLConnection urlConnection = (HttpURLConnection) url

.openConnection();// 打開URL

BufferedReader reader = new BufferedReader(new InputStreamReader(

urlConnection.getInputStream(), encoding));// 得到輸入流，即獲得了網(wǎng)頁的內(nèi)容

String line; // 讀取輸入流的數(shù)據(jù)，并顯示

while ((line = reader.readLine()) != null) {

System.out.println(line);

}

}

}

根據(jù)具體問題類型，進(jìn)行步驟拆解／原因原理分析／內(nèi)容拓展等。

具體步驟如下：／導(dǎo)致這種情況的原因主要是……

java如何獲取帶有css js 執(zhí)行完后的網(wǎng)頁源代碼

只能抓取靜態(tài)的頁面源代碼，因?yàn)楹芏嗍录蜆邮绞莿?dòng)態(tài)綁定和執(zhí)行的，所以不可能獲取到執(zhí)行完后的代碼的。

public

String

getHtmlContent(String

htmlurl)

{

URL

url;

String

temp;

StringBuffer

sb

=

new

StringBuffer();

try

{

url

=

new

URL(htmlurl);

BufferedReader

in

=

new

BufferedReader(new

InputStreamReader(url.openStream(),

"gbk"));

while

((temp

=

in.readLine())

!=

null)

{

sb.append(temp);

}

in.close();

}

catch

(final

MalformedURLException

me)

{

me.getMessage();

}

catch

(final

IOException

e)

{

e.printStackTrace();

}

return

sb.toString();

}

java中如何根據(jù)一個(gè)網(wǎng)址獲得該網(wǎng)頁的源代碼，急求

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

public class HttpTest {

String urlString;

public static void main(String[] args) throws Exception {

HttpTest client = new HttpTest(網(wǎng)址);

client.run();

}

public HttpTest(String urlString) {

this.urlString = urlString;

}

public void run() throws Exception {

//生成一個(gè)URL對(duì)象

URL url = new URL(urlString);

//打開URL

HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

//得到輸入流，即獲得了網(wǎng)頁的內(nèi)容

BufferedReader reader = new BufferedReader(new InputStreamReader(urlConnection

.getInputStream()));

String line;

// 讀取輸入流的數(shù)據(jù)，并顯示

while ((line = reader.readLine()) != null){

System.out.println(line);

}

}

}

Java訪問指定URL并獲取網(wǎng)頁源代碼

1．編寫useSourceViewer 類的基本框架，該類僅包括無返回值的main ()方法，該方法從參數(shù)中獲取URL，通過輸入緩沖和輸出緩沖將該URL 原碼輸出。

2．編寫useSourceViewer 類，代碼如下：

import java.net.*;

import java.io.*;

public class useSourceViewer

{

public static void main (String[] args)

{

if (args.length 0)

{

try

{

//讀入U(xiǎn)RL

URL u = new URL(args[0]);

InputStream in = u.openStream( );

// 為增加性能存儲(chǔ)輸入流

in = new BufferedInputStream(in);

// 將輸入流連接到閱讀器

Reader r = new InputStreamReader(in);

int c;

while ((c = r.read( )) != -1)

{

System.out.print((char) c);

}

Object o = u.getContent( );

System.out.println("I got a " + o.getClass().getName( ));

}

catch (MalformedURLException e)

{

System.err.println(args[0] + " is not a parseable URL");

}

catch (IOException e)

{

System.err.println(e);

}

} // end if

} // end main

} // end SourceViewer}