import java.io.IOException

import java.io.InputStreamReader

import java.net.MalformedURLException

import java.net.URL

import java.util.ArrayList

import java.util.List

public class GetLinks {

private String webSource

private String url

public GetLinks(String url) throws MalformedURLException, IOException {

this.url = Complete(url)

webSource = getWebCon(this.url)

}

private String getWebCon(String strURL) throws MalformedURLException,

IOException {

StringBuffer sb = new StringBuffer()

java.net.URL url = new java.net.URL(strURL)

BufferedReader in = new BufferedReader(new InputStreamReader(url

.openStream()))

String line

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

sb.append(line)

}

in.close()

return sb.toString()

}

private String Complete(String link)throws MalformedURLException{

URL url1 = new URL(link)

URL url2 = new URL(link+"/")

String handledUrl = link

try{

StringBuffer sb1 = new StringBuffer()

BufferedReader in1 = new BufferedReader(new InputStreamReader(url1

.openStream()))

String line1

while ((line1 = in1.readLine()) != null) {

sb1.append(line1)

}

in1.close()

StringBuffer sb2 = new StringBuffer()

BufferedReader in2 = new BufferedReader(new InputStreamReader(url2

.openStream()))

String line2

while ((line2 = in2.readLine()) != null) {

sb2.append(line2)

}

in1.close()

if(sb1.toString().equals(sb2.toString())){

handledUrl = link+"/"

}

}catch(Exception e){

handledUrl = link

}

return handledUrl

}

/**

* 处理链接的相对路径

* @param link 相对路径或绝对路径

* @return 绝对路径

*/

private String urlHandler(String link) {

if (link == null)

return null

link = link.trim()

if (link.toLowerCase().startsWith("http://")

|| link.toLowerCase().startsWith("https://")) {

return link

}

String pare = url.trim()

if (!link.startsWith("/")) {

if (pare.endsWith("/")) {

return pare + link

}

if (url.lastIndexOf("/") == url.indexOf("//") + 1 || url.lastIndexOf("/") == url.indexOf("//") + 2) {

return pare + "/" + link

} else {

int lastSeparatorIndex = url.lastIndexOf("/")

return url.substring(0, lastSeparatorIndex + 1) + link

}

}else{

if (url.lastIndexOf("/") == url.indexOf("//") + 1 || url.lastIndexOf("/") == url.indexOf("//") + 2) {

return pare + link

}else{

return url.substring(0,url.indexOf("/", url.indexOf("//")+3)) + link

}

}

}

public List<String>getAnchorTagUrls() {

if (webSource == null) {

System.out.println("没有网页源代码")

return null

}

ArrayList<String>list = new ArrayList<String>()

int index = 0

while (index != -1) {

index = webSource.toLowerCase().indexOf("<a ", index)

if (index != -1) {

int end = webSource.indexOf(">", index)

String str = webSource.substring(index, end == -1 ? webSource

.length() : end)

str = str.replaceAll("\\s*=\\s*", "=")

if (str.toLowerCase().matches("^<a.*href\\s*=\\s*[\'|\"]?.*")) {// "^<a\\s+\\w*\\s*href\\s*=\\s*[\'|\"]?.*"

int hrefIndex = str.toLowerCase().indexOf("href=")

int leadingQuotesIndex = -1

if ((leadingQuotesIndex = str.indexOf("\"", hrefIndex

+ "href=".length())) != -1) { // 形如<a

// href=".....">

int TrailingQuotesIndex = str.indexOf("\"",

leadingQuotesIndex + 1)

TrailingQuotesIndex = TrailingQuotesIndex == -1 ? str

.length() : TrailingQuotesIndex

str = str.substring(leadingQuotesIndex + 1,

TrailingQuotesIndex)

str = urlHandler(str)

list.add(str)

System.out.println(str)

index += "<a ".length()

continue

}

if ((leadingQuotesIndex = str.indexOf("\'", hrefIndex

+ "href=".length())) != -1) { // 形如<a

// href='.....'>

int TrailingQuotesIndex = str.indexOf("\'",

leadingQuotesIndex + 1)

TrailingQuotesIndex = TrailingQuotesIndex == -1 ? str

.length() : TrailingQuotesIndex

str = str.substring(leadingQuotesIndex + 1,

TrailingQuotesIndex)

str = urlHandler(str)

System.out.println(str)

list.add(str)

index += "<a ".length()

continue

}

int whitespaceIndex = str.indexOf(" ", hrefIndex

+ "href=".length())// 形如<a href=

// http://www.baidu.com >

whitespaceIndex = whitespaceIndex == -1 ? str.length()

: whitespaceIndex

str = str.substring(hrefIndex + "href=".length(),

whitespaceIndex)

str = urlHandler(str)

list.add(str)

System.out.println(str)

}

index += "<a ".length()

}

}

return list

}

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

GetLinks gl = new GetLinks("http://www.baidu.com")

List<String>list = gl.getAnchorTagUrls()

for(String str:list) {

System.out.println(str)

}

}

}

一、跳转到新页面，并且是在新窗口中打开页面:

function openHtml()

{

//do someghing here...

window.open("xxxx.html")

}

window是一个javascript对象，可以用它的open方法，需要注意的是，如果这个页面不是一相相对路径，那么要加“http://”，比如：

function openHtml()

{

window.open("http://www.baidu.com")

}

二、在本页面窗口中跳转：

function totest2()

{

window.location.assign("test2.html")

}

如果直接使用location.assgin()也可以，但是window.location.assign()更合理一些，当前窗口的location对象的assign()方法。

另外，location对象还有一个方法replace()也可以做页面跳转，它跟assign()方法的区别在于：

replace() 方法不会在 History 对象中生成一个新的纪录。当使用该方法时，新的 URL 将覆盖 History 对象中的当前纪录。

package RequestPackage

import java.util.HashMap

import java.util.Map

public class CRequest {

/**

* 解析出url请求的路径，包括页面

* @param strURL url地址

* @return url路径

*/

public static String UrlPage(String strURL)

{

String strPage=null

String[] arrSplit=null

strURL=strURL.trim().toLowerCase()

arrSplit=strURL.split("[?]")

if(strURL.length()>0)

{

if(arrSplit.length>1)

{

if(arrSplit[0]!=null)

{

strPage=arrSplit[0]

}

}

}

return strPage

}

/**

* 去掉url中的路径，留下请求参数部分

* @param strURL url地址

* @return url请求参数部分

*/

private static String TruncateUrlPage(String strURL)

{

String strAllParam=null

String[] arrSplit=null

strURL=strURL.trim().toLowerCase()

arrSplit=strURL.split("[?]")

if(strURL.length()>1)

{

if(arrSplit.length>1)

{

if(arrSplit[1]!=null)

{

strAllParam=arrSplit[1]

}

}

}

return strAllParam

}

/**

* 解析出url参数中的键值对

* 如 "index.jsp?Action=del&id=123"，解析出Action:del,id:123存入map中

* @param URL url地址

* @return url请求参数部分

*/

public static Map<String, String>URLRequest(String URL)

{

Map<String, String>mapRequest = new HashMap<String, String>()

String[] arrSplit=null

String strUrlParam=TruncateUrlPage(URL)

if(strUrlParam==null)

{

return mapRequest

}

//每个键值为一组 www.2cto.com

arrSplit=strUrlParam.split("[&]")

for(String strSplit:arrSplit)

{

String[] arrSplitEqual=null

arrSplitEqual= strSplit.split("[=]")

//解析出键值

if(arrSplitEqual.length>1)

{

//正确解析

mapRequest.put(arrSplitEqual[0], arrSplitEqual[1])

}

else

{

if(arrSplitEqual[0]!="")

{

//只有参数没有值，不加入

mapRequest.put(arrSplitEqual[0], "")

}

}

}

return mapRequest

}

}

测试类

package RequestPackage

import java.util.Map

public class TestCRequest {

/**用于测试CRequest类

* @param args

*/

public static void main(String[] args) {

// 请求url

String str = "index.jsp?Action=del&id=123&sort="

//url页面路径

System.out.println(CRequest.UrlPage(str))

//url参数键值对

String strRequestKeyAndValues=""

Map<String, String>mapRequest = CRequest.URLRequest(str)

for(String strRequestKey: mapRequest.keySet()) {

String strRequestValue=mapRequest.get(strRequestKey)

strRequestKeyAndValues+="key:"+strRequestKey+",Value:"+strRequestValue+""

}

System.out.println(strRequestKeyAndValues)

//获取无效键时，输出null

System.out.println(mapRequest.get("page"))

}

}