java url request参数解析类

httpclient提供了一个，悲剧的是没法下载，只好按照它代码写了个，自己扩展了些：

package com.yunzu.jsoup;import java.io.UnsupportedEncodingException;import java.net.URI;import java.net.URISyntaxException;import java.net.URLDecoder;import java.util.ArrayList;import java.util.Collections;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.Scanner;import org.apache.commons.httpclient.NameValuePair;public class URLEncodedUtils {private static final String PARAMETER_SEPARATOR = "&";private static final String NAME_VALUE_SEPARATOR = "=";public static final String DEFAULT_CONTENT_CHARSET = "ISO-8859-1";/* * assume each name is unique */public static String getParameter(final String url, final String encoding,final String name) throws URISyntaxException {Map<String, String> mapparams = new HashMap<String, String>();List<NameValuePair> params = URLEncodedUtils.parse(new URI(url), "UTF-8");for (NameValuePair param : params) {mapparams.put(param.getName(), param.getValue());}return mapparams.get(name);}public static List<NameValuePair> parse(final URI uri, final String encoding) {List<NameValuePair> result = Collections.emptyList();final String query = uri.getRawQuery();if (query != null && query.length() > 0) {result = new ArrayList<NameValuePair>();parse(result, new Scanner(query), encoding);}return result;}public static void parse(final List<NameValuePair> parameters,final Scanner scanner, final String encoding) {scanner.useDelimiter(PARAMETER_SEPARATOR);while (scanner.hasNext()) {final String[] nameValue = scanner.next().split(NAME_VALUE_SEPARATOR);if (nameValue.length == 0 || nameValue.length > 2)throw new IllegalArgumentException("bad parameter");final String name = decode(nameValue[0], encoding);String value = null;if (nameValue.length == 2)value = decode(nameValue[1], encoding);parameters.add(new NameValuePair(name, value));}}private static String decode(final String content, final String encoding) {try {return URLDecoder.decode(content, encoding != null ? encoding: DEFAULT_CONTENT_CHARSET);} catch (UnsupportedEncodingException problem) {throw new IllegalArgumentException(problem);}}}

调用也很简单：

String sUrl = "http://book.sina.cn/prog/wapsite/books/h5/vipc.php?bid=217269&cid=293500&cp=1&sort=asc&PHPSESSID=0cbd7d80b00593b0b3d446bd97d781ab&vt=4&book_explore=1";List<NameValuePair> params;try {params = URLEncodedUtils.parse(new URI(sUrl), "UTF-8");for (NameValuePair param : params) {      System.out.println(param.getName() + " : " + param.getValue());    }} catch (URISyntaxException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}System.out.println("getparameter begin.........");try {System.out.println(URLEncodedUtils.getParameter(sUrl, "UTF-8", "bid"));} catch (URISyntaxException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}System.out.println("getparameter end.........");