使用GET方法发送请求
private static boolean sendGETRequest (String path,
Map<String, String> params) throws Exception{
//发送地http://192.168.100.91:8080/videoService/login?username=abc&password=123
// StringBuilder是用来组拼请求地址和参数
StringBuilder sb = new StringBuilder();
sb.append(path).append("?");
if(params!=null &¶ms.size()!=0){
for (Map.Entry<String, String> entry : params.entrySet()) {
//如果请求参数中有中文，需要进行URLEncoder编码
sb.append(entry.getKey()).append("=").append(URLEncoder.encode(entry.getValue(), "utf-8"));
sb.append("&");
}
sb.deleteCharAt(sb.length()-1);
}
URL url = new URL(sb.toString());
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(5000);
conn.setRequestMethod("GET");
if(conn.getResponseCode()==200){
return true;
}
return false;
}
使用POST方法发送请求
我们先从IE浏览器中使用POST方法发送一次：（下面内容可以用HttpWatch看到）
POST /videoService/login HTTP/1.1
Accept: image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/QVOD, application/QVOD, */*
Referer: http://192.168.100.91:8080/videoService/login.jsp
Accept-Language: zh-CN,en;q=0.5
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; GTB6.5; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; Tablet PC 2.0)
Content-Type: application/x-www-form-urlencoded//POST请求这个一定要设置
Accept-Encoding: gzip, deflate
Host: 192.168.100.91:8080
Content-Length: 26//还有发送内容长度也要设置
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: JSESSIONID=7E1435CB8A071D07A430453250348C41
username=asd&password=1234//这里是请求体部分，一共26个字节，与Content-Length长度一样
private static boolean sendPOSTRequest(String path,
Map<String, String> params) throws Exception{
// StringBuilder是用来组拼请求参数
StringBuilder sb = new StringBuilder();
if(params!=null &¶ms.size()!=0){
for (Map.Entry<String, String> entry : params.entrySet()) {
sb.append(entry.getKey()).append("=").append(URLEncoder.encode(entry.getValue(), "utf-8"));
sb.append("&");
}
sb.deleteCharAt(sb.length()-1);
}
// entity为请求体部分内容
//如果有中文则以UTF-8编码为username=%E4%B8%AD%E5%9B%BD&password=123
byte[] entity = sb.toString().getBytes();
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(5000);
conn.setRequestMethod("POST");
//要向外输出数据，要设置这个
conn.setDoOutput(true);
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", entity.length+"");
OutputStream os = conn.getOutputStream();
//以POST方式发送请求体
os.write(entity);
if(conn.getResponseCode()==200){
return true;
}
return false;
}
以Android集成的HttpClient框架来发送
private static boolean sendPOSTRequestHttpClient(String path,
Map<String, String> params) throws Exception{
//封装请求参数
List<NameValuePair> pair = new ArrayList<NameValuePair>();
if(params!=null&& !params.isEmpty()){
for(Map.Entry<String, String> entry:params.entrySet()){
pair.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
}
//把请求参数变成请求体部分
UrlEncodedFormEntity uee = new UrlEncodedFormEntity(pair, "utf-8");
//使用HttpPost对象设置发送的URL路径
HttpPost post = new HttpPost(path);
//发送请求体
post.setEntity(uee);
//创建一个浏览器对象，以把POST对象向服务器发送，并返回响应消息
DefaultHttpClient dhc = new DefaultHttpClient();
HttpResponse response = dhc.execute(post);
if(response.getStatusLine().getStatusCode()==200){
Log.i("http", "httpclient");
return true;
}
return false;
}