一、使用 HttpClient 抓取网页数据
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public String getHtml(String htmlurl) throws IOException {
StringBuffer sb = new StringBuffer();
String acceptEncoding = "";
/* 1.生成 HttpClinet 对象并设置参数 */
HttpClient httpClient = new HttpClient();
GetMethod method = new GetMethod(htmlurl);
int statusCode;
try {
statusCode = httpClient.executeMethod(method);
// 判断访问的状态码
if (statusCode != HttpStatus.SC_OK) {
return null;
} else {
if (method.getResponseHeader("Content-Encoding") != null)
acceptEncoding = method.getResponseHeader(
"Content-Encoding").getValue();
if (acceptEncoding.toLowerCase().indexOf("gzip") > -1) {
// 建立gzip解压工作流
InputStream is;
is = method.getResponseBodyAsStream();
GZIPInputStream gzin = new GZIPInputStream(is);
InputStreamReader isr = new InputStreamReader(gzin, Charset.forName(CHARSET)); // 设置读取流的编码格式，自定义编码
java.io.BufferedReader br = new java.io.BufferedReader(isr);
String tempbf;
while ((tempbf = br.readLine()) != null) {
if(StringUtils.isNotBlank(tempbf)){
sb.append(tempbf);
}
}
isr.close();
gzin.close();
System.out.println(sb);
} else {
InputStreamReader isr;
isr = new InputStreamReader(
method.getResponseBodyAsStream(), CHARSET);
java.io.BufferedReader br = new java.io.BufferedReader(isr);
String tempbf;
while ((tempbf = br.readLine()) != null) {
if(StringUtils.isNotBlank(tempbf)){
sb.append(tempbf);
}
}
isr.close();
}
}
} catch (HttpException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
method.abort();
method.releaseConnection();
return sb.toString();
}
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二、使用HttpPost抓取网页数据
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private static CloseableHttpClient httpClient;
private static BasicHttpContext httpContext;
private static BasicCookieStore cookieStore;
private static PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
private static RequestConfig globalConfig = RequestConfig.custom().setCookieSpec(CookieSpecs.BEST_MATCH).build();
private static RequestConfig localConfig = RequestConfig.copy(globalConfig).setCookieSpec(CookieSpecs.BROWSER_COMPATIBILITY).build();
public String getHtml(String url){
HttpClientBuilder builder = HttpClients.custom();
cookieStore = new BasicCookieStore();
builder.setConnectionManager(cm);
builder.setDefaultCookieStore(cookieStore);
builder.setDefaultRequestConfig(globalConfig);
httpClient = builder.build();
httpContext = new BasicHttpContext();
httpContext.setAttribute(ClientContext.COOKIE_STORE, cookieStore);
HttpPost httpPost = new HttpPost(url);
httpPost.setConfig(localConfig);
httpPost.setHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
httpPost.setHeader("Accept-Encoding","gzip, deflate");
httpPost.setHeader("Accept-Language","zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3");
httpPost.setHeader("Connection","keep-alive");
httpPost.setHeader("Cookie","ASP.NET_SessionId=11vrr4ucwsgeqtmpyfx4hmvx; _5t_trace_sid=89c4ffb8633d267e4ae322a157b52471; _5t_trace_tms=1; CheckCode=X0P64");
httpPost.setHeader("User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0");
List <NameValuePair> nvps = new ArrayList <NameValuePair>();
nvps.add(new BasicNameValuePair("pid", "99-C3-57-35-6D-70-3D-F2"));
nvps.add(new BasicNameValuePair("CurrentlyPageIndex", "2"));
httpPost.setEntity(new UrlEncodedFormEntity(nvps, Consts.UTF_8));
try {
CloseableHttpResponse response = httpClient.execute(httpPost,httpContext);
int status = response.getStatusLine().getStatusCode();
if (status >= 200 && status < 300) {
HttpEntity httpEntity = response.getEntity();
if(httpEntity!=null){
String cont = trimLineToString(httpEntity, "UTF-8");
EntityUtils.consume(httpEntity);
return cont;
}
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
public synchronized static String trimLineToString(HttpEntity entiry,String charset) {
StringBuffer sb = new StringBuffer();
BufferedReader reader = null;
try {
InputStream instream = entiry.getContent();
reader = new BufferedReader(new InputStreamReader(instream, charset));
String str = null;
while ((str = reader.readLine()) != null) {
if(StringUtils.isNotBlank(str)) {
sb.append(str.trim());
}
}
instream.close();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return sb.toString();
}
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