用java寫(xiě)一個(gè)網(wǎng)頁(yè)輸入url點(diǎn)擊查詢(xún)即可在下面顯示網(wǎng)頁(yè)源代碼

import?java.io.*;

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import?java.net.*;

public?class?Demo?{

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

BufferedReader?br?=?new?BufferedReader(new?InputStreamReader(System.in));

System.out.println("請(qǐng)輸入要顯示源碼的地址：");

URL?url?=?new?URL(br.readLine());

URLConnection?conn?=?url.openConnection();

InputStream?is?=?conn.getInputStream();

byte[]?b?=?new?byte[1024];

int?len?=?0;

while((len?=?is.read(b))!=-1){

System.out.println(new?String(b,0,len,"UTF-8"));

}

}

}

//下班，控制臺(tái)的，網(wǎng)頁(yè)的你稍微修改一下就OK啦。

怎么樣查看一個(gè)網(wǎng)頁(yè)的java代碼并修改？

看不了。java代碼都是在服務(wù)器上執(zhí)行完后，把執(zhí)行完畢的結(jié)果發(fā)送到你的瀏覽器。

你只能看到執(zhí)行后的結(jié)果

java中如何根據(jù)一個(gè)網(wǎng)址獲得該網(wǎng)頁(yè)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(kāi)URL

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

//得到輸入流，即獲得了網(wǎng)頁(yè)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中如何根據(jù)一個(gè)網(wǎng)址獲得該網(wǎng)頁(yè)的源代碼？

package test;

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(kāi)URL

BufferedReader reader = new BufferedReader(new InputStreamReader(

urlConnection.getInputStream(), encoding));// 得到輸入流，即獲得了網(wǎng)頁(yè)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(wèn)題類(lèi)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訪問(wèn)指定URL并獲取網(wǎng)頁(yè)源代碼

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

2．編寫(xiě)useSourceViewer 類(lèi)，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}