import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.Reader; import java.io.StringWriter; import java.io.Writer; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.util.Map; import javax.servlet.http.HttpServletRequest; public class RequestUtil { public final static String getErrorUrl(HttpServletRequest request) { String errorUrl = (String) request.getAttribute("javax.servlet.error.request_uri"); if (errorUrl == null) { errorUrl = (String) request.getAttribute("javax.servlet.forward.request_uri"); } if (errorUrl == null) { errorUrl = (String) request.getAttribute("javax.servlet.include.request_uri"); } if (errorUrl == null) { errorUrl = request.getRequestURL().toString(); } return errorUrl; } /** * 获取 请求参数 * @param request * @return */ public static String queryString(HttpServletRequest request){ Map<String, String[]> params = request.getParameterMap(); String queryString = ""; for (String key : params.keySet()) { String[] values = params.get(key); for (int i = 0; i < values.length; i++) { String value = values[i]; if(value!=null){ value=StringUtil.stringURLDecoderByUTF8(value); } queryString += key + "=" + value + "&"; } } // 去掉最后一个空格 queryString = queryString.substring(0, queryString.length() - 1); return queryString; } public final static StringBuilder getErrorInfoFromRequest(HttpServletRequest request, boolean isInfoEnabled) { StringBuilder sb = new StringBuilder(); String errorUrl = getErrorUrl(request); sb.append(StringUtil.formatMsg("Error processing url: %1, Referrer: %2, Error message: %3.\n", errorUrl, request.getHeader("REFERER"), request.getAttribute("javax.servlet.error.message"))); Throwable ex = (Throwable) request.getAttribute("exception"); if (ex == null) { ex = (Throwable) request.getAttribute("javax.servlet.error.exception"); } if (ex != null) { sb.append(StringUtil.formatMsg("Exception stack trace: \n", ex)); } return sb; } public final static String getHtml(String fullUrl) throws IOException{ URL url = new URL(fullUrl); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); InputStream in = conn.getInputStream(); Writer writer = new StringWriter(); if (in != null) { char[] buffer = new char[1024]; try { Reader reader = new BufferedReader(new InputStreamReader(in, "UTF-8")); int n; while ((n = reader.read(buffer)) != -1) { writer.write(buffer, 0, n); } } finally { in.close(); } } return writer.toString(); } public static void main(String[]args) throws IOException{ String url="http://www.baidu.com"; String a=getHtml(url); System.out.println("ss:"+a); } } |