Java HttpURLConnection.setDefaultUseCaches方法代码示例

import java.net.HttpURLConnection; //导入方法依赖的package包/类
/**
 * Initial the connection for POST and GET method.
 * 
 * @param connection
 * @param method
 * @param requestProperties
 * @param connectTimeOut
 * @param readTimeOut
 * @throws IOException
 */
private static void initConnection(HttpURLConnection connection, String method,
        Map<String, String> requestProperties, Long connectTimeOut, Long readTimeOut) throws IOException {
    if (connection != null) {
        connection.setUseCaches(false);
        connection.setDefaultUseCaches(false);
        connection.setDoInput(true);
        if (method != null && method.trim().length() > 0) {
            try {
                connection.setRequestMethod(method);
            } catch (ProtocolException e) {
                throw new IOException("Set Request Method Error: " + e);
            }
            if (SEND_METHOD_POST.equals(method)) {
                connection.setDoOutput(true);
            }
        } else {
            throw new IOException("Error Method Parameter: " + method);
        }
        if (requestProperties != null && requestProperties.size() > 0) {
            String key, value;
            for (Map.Entry<String, String> tempEntry : requestProperties.entrySet()) {
                key = tempEntry.getKey();
                value = tempEntry.getValue();
                connection.setRequestProperty(key, value);
            }
        }
        if (connectTimeOut != null && readTimeOut != null) {
            System.setProperty("sun.net.client.defaultConnectTimeout", connectTimeOut.toString());
            System.setProperty("sun.net.client.defaultReadTimeout", readTimeOut.toString());
            connection.setConnectTimeout(connectTimeOut.intValue());
            connection.setReadTimeout(readTimeOut.intValue());
        }
        connection.setRequestProperty("User-Agent", "Mozilla/MSIE");
    } else {
        throw new IOException("Error HttpURLConnection Parameter connection is null.");
    }
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
@Override
public void run()
{
    super.run();
    StringBuilder contents = new StringBuilder();
    String tempContents;

    if (this.requestMode.equals("GET") && this.params.size() > 0)
    {
        this.targetUrl += "?" + this.getEncodedParams();
    }

    try
    {
        URL url = new URL(this.targetUrl);
        URLConnection conn = (URLConnection) url.openConnection();
        HttpURLConnection hconn = (HttpURLConnection) conn;

        hconn.setRequestMethod(this.requestMode);
        hconn.setDoOutput(true);
        hconn.setDoInput(true);
        hconn.setUseCaches(true);
        hconn.setDefaultUseCaches(true);

        if (this.params.size() > 0 && this.requestMode.equals("POST"))
        {
            byte[] postParams = this.getEncodedParams().getBytes("UTF-8");
            hconn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            hconn.setRequestProperty("Content-Length", String.valueOf(postParams.length));

            OutputStream writer = hconn.getOutputStream();
            writer.write(postParams);
            writer.flush();
            writer.close();
        }

        BufferedReader buff = new BufferedReader(new InputStreamReader (hconn.getInputStream(), "UTF-8"));

        while((tempContents = buff.readLine()) != null)
        {
            contents.append(tempContents);
        }

        buff.close();
        this.doneHandler.func(contents);
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
}
 

import java.net.HttpURLConnection; //导入方法依赖的package包/类
public static HttpResponse getData(RequestType type, String url, String post, HashMap<String, String> headers) {
    Thread.setDefaultUncaughtExceptionHandler(com.gmt2001.UncaughtExceptionHandler.instance());

    HttpResponse r = new HttpResponse();

    r.type = type;
    r.url = url;
    r.post = post;
    r.headers = headers;

    try {
        URL u = new URL(url);

        HttpURLConnection h = (HttpURLConnection) u.openConnection();

        for (Entry<String, String> e : headers.entrySet()) {
            h.addRequestProperty(e.getKey(), e.getValue());
        }

        h.setRequestMethod(type.name());
        h.setUseCaches(false);
        h.setDefaultUseCaches(false);
        h.setConnectTimeout(timeout);
        h.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.52 Safari/537.36 QuorraBotJ/2015");
        if (!post.isEmpty()) {
            h.setDoOutput(true);
        }

        h.connect();

        if (!post.isEmpty()) {
            BufferedOutputStream stream = new BufferedOutputStream(h.getOutputStream());
            stream.write(post.getBytes());
            stream.flush();
            stream.close();
        }

        if (h.getResponseCode() < 400) {
            r.content = IOUtils.toString(new BufferedInputStream(h.getInputStream()), h.getContentEncoding());
            r.httpCode = h.getResponseCode();
            r.success = true;
        } else {
            r.content = IOUtils.toString(new BufferedInputStream(h.getErrorStream()), h.getContentEncoding());
            r.httpCode = h.getResponseCode();
            r.success = false;
        }
    } catch (IOException ex) {
        r.success = false;
        r.httpCode = 0;
        r.exception = ex.getMessage();

        com.gmt2001.Console.err.printStackTrace(ex);
    }

    return r;
}