java HttpURLConnection來實作get及post動作
這個範例可以利用java.net.HttpURLconnection來摸擬瀏覽網頁
做form submit動作
public boolean doPost(String sURL,String data,String cookie,String referer,String charset)
post部份需要傳入
sURL：Action的url
data ：要傳送的的資料也就是像id=123&test=456之類的
cookie：是否要傳送cookie資料，可為null，像 __utma=114386561.1334910113.1250671126.1251247266.1251279995.24;
referer：傳那裡來的，是一個網址，可為null
charset：傳送及取回的資料編碼為何
public boolean doGet(String sURL,String cookie,String referer,String charset)
跟post唯一不同的地方為
sURL：Action的url 再加上?data ，像http://www.aaa.com/123.jsp?id=123&test=456
ps.範例使用log4j，如果不會用的人可以直接把log4j部份改成System.out.println
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private org.apache.log4j.Logger logger;
public WebModule() {
logger = org.apache.log4j.Logger.getLogger(this.getClass());
}
public boolean doPost(String sURL, String data, String cookie,
String referer, String charset) {
boolean doSuccess = false;
java.io.BufferedWriter wr = null;
try {
URL url = new URL(sURL);
HttpURLConnection URLConn = (HttpURLConnection) url
.openConnection();
URLConn.setDoOutput(true);
URLConn.setDoInput(true);
((HttpURLConnection) URLConn).setRequestMethod("POST");
URLConn.setUseCaches(false);
URLConn.setAllowUserInteraction(true);
HttpURLConnection.setFollowRedirects(true);
URLConn.setInstanceFollowRedirects(true);
URLConn
.setRequestProperty(
"User-agent",
"Mozilla/5.0 (Windows; U; Windows NT 6.0; zh-TW; rv:1.9.1.2) "
+ "Gecko/20090729 Firefox/3.5.2 GTB5 (.NET CLR 3.5.30729)");
URLConn
.setRequestProperty("Accept",
"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
URLConn.setRequestProperty("Accept-Language",
"zh-tw,en-us;q=0.7,en;q=0.3");
URLConn.setRequestProperty("Accept-Charse",
"Big5,utf-8;q=0.7,*;q=0.7");
if (cookie != null)
URLConn.setRequestProperty("Cookie", cookie);
if (referer != null)
URLConn.setRequestProperty("Referer", referer);
URLConn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
URLConn.setRequestProperty("Content-Length", String.valueOf(data
.getBytes().length));
java.io.DataOutputStream dos = new java.io.DataOutputStream(URLConn
.getOutputStream());
dos.writeBytes(data);
java.io.BufferedReader rd = new java.io.BufferedReader(
new java.io.InputStreamReader(URLConn.getInputStream(),
charset));
String line;
while ((line = rd.readLine()) != null) {
System.out.println(line);
}
rd.close();
} catch (java.io.IOException e) {
doSuccess = false;
logger.info(e);
} finally {
if (wr != null) {
try {
wr.close();
} catch (java.io.IOException ex) {
logger.info(ex);
}
wr = null;
}
}
return doSuccess;
}
public boolean doGet(String sURL, String cookie, String referer,
String charset) {
boolean doSuccess = false;
BufferedReader in = null;
try {
URL url = new URL(sURL);
HttpURLConnection URLConn = (HttpURLConnection) url
.openConnection();
URLConn
.setRequestProperty(
"User-agent",
"Mozilla/5.0 (Windows; U; Windows NT 6.0; zh-TW; rv:1.9.1.2) "
+ "Gecko/20090729 Firefox/3.5.2 GTB5 (.NET CLR 3.5.30729)");
URLConn
.setRequestProperty("Accept",
"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
URLConn.setRequestProperty("Accept-Language",
"zh-tw,en-us;q=0.7,en;q=0.3");
URLConn.setRequestProperty("Accept-Charse",
"Big5,utf-8;q=0.7,*;q=0.7");
if (cookie != null)
URLConn.setRequestProperty("Cookie", cookie);
if (referer != null)
URLConn.setRequestProperty("Referer", referer);
URLConn.setDoInput(true);
URLConn.setDoOutput(true);
URLConn.connect();
URLConn.getOutputStream().flush();
in = new BufferedReader(new InputStreamReader(URLConn
.getInputStream(), charset));
String line;
while ((line = in.readLine()) != null) {
System.out.println(line);
}
} catch (IOException e) {
doSuccess = false;
log.out.println(e);
e.printStackTrace();
} finally {
if (in != null) {
try {
in.close();
} catch (java.io.IOException ex) {
logger.info(ex);
}
in = null;
}
}
return doSuccess;
}
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