預先安裝函式庫:
Apache Commons HttpClient 3.x
Apache Commons Codec
Apache Commons Logging
<%@ page contentType="text/html" pageEncoding="UTF-8"%>
<%@ page import="org.apache.commons.http.client.*" %>
<%@ page import="org.apache.commons.http.client.methods.*" %>
<%@ page import="org.apache.commons.http.client.params.HttpMethodParams" %>
<%@ page import="java.io.*" %>
<%
String url = "http://tw.stock.yahoo.com/";
String stockId = request.getParameter("stock_id");
if (stockId != null) {
url += "q/q?s=" + stockId;
}
// Create an instance of HttpClient.
HttpClient client = new HttpClient();
// Create a method instance.
HttpMethod method = new GetMethod(url);
// Provide custom retry handler is necessary
method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
new DefaultHttpMethodRetryHandler(3, false));
try {
// Execute the method.
int statusCode = client.executeMethod(method);
if (statusCode != HttpStatus.SC_OK) {
System.err.println("Method failed: " + method.getStatusLine());
}
// Read the response body.
byte[] responseBody = method.getResponseBody();
// Deal with the response.
// Use caution: ensure correct character encoding and is not binary data
//System.out.println(new String(responseBody));
String result = new String(responseBody, "Big5");
if (stockId != null) {
result = result.substring(result.indexOf("nowrap><b>") + "nowrap><b>".length());
result = result.substring(0, result.indexOf("</b>"));
out.println(stockId + " Price Now: " + result);
} else {
out.println(result);
}
} catch (HttpException e) {
System.err.println("Fatal protocol violation: " + e.getMessage());
e.printStackTrace();
} catch (IOException e) {
System.err.println("Fatal transport error: " + e.getMessage());
e.printStackTrace();
} finally {
// Release the connection.
method.releaseConnection();
}
%>