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1. 使用HttpClient
public static String methodGet(String reqUrl) {
String result = "";
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(reqUrl);
httpGet.getParams().setParameter(CoreProtocolPNames.HTTP_CONTENT_CHARSET, "UTF-8");
try {
HttpResponse httpResponse = httpClient.execute(httpGet);
if (httpResponse.getStatusLine().getStatusCode() == 200) {
HttpEntity entity = httpResponse.getEntity();
result = EntityUtils.toString(entity, HTTP.UTF_8);// 返回的结果集
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
public static String methodPost(){
String result = "";
String url = "";
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("cp_id", "")); //传递的参数,类似map
try {
httpPost.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));
HttpResponse httpResponse = httpClient.execute(httpPost);
if (httpResponse.getStatusLine().getStatusCode() == 200) {
HttpEntity entity = httpResponse.getEntity();
result = EntityUtils.toString(entity, HTTP.UTF_8); // 返回的json
System.out.println(result);
}
} catch (Exception e) {
}
return result;
}
2.基础版本
public static String invidePost(String data){
PrintWriter out=null;
BufferedReader in =null;
String result = "";
try {
URL realUrl=new URL("http://yrt.51haoyitou.com/api/spreadUserData?startday=2016-09-05&endday=2016- 09- 05&sign=9c7c03693dedf82587a43b05ac892ca3&type=38");
URLConnection conn=realUrl.openConnection();
// 设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
//out.print("dt={\"p1\":\"094\",\"p2\":\"admin\",\"p3\":\"10050\",\"p4\":\"192.168.1.1\"}");
//out.print("dt="+data);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(
new InputStreamReader(conn.getInputStream(),"utf-8"));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
System.out.println(result);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex){
ex.printStackTrace();
}
}
return result;
}
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原文地址:http://www.cnblogs.com/huangyin/p/5888246.html