//1. POST调用外部服务器接口，获取返回Json数据
private String getClientData(Map<String, String> params， String url) throws AppException {
URL connect;
StringBuffer data = new StringBuffer();
try {
//创建连接
connect = new URL(url);
HttpURLConnection connection = (HttpURLConnection)connect.openConnection();
connection.setRequestMethod("POST");
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setUseCaches(false);//post不能使用缓存
connection.setInstanceFollowRedirects(true);
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
OutputStreamWriter paramout = new OutputStreamWriter(
connection.getOutputStream(),"UTF-8");
//拼接Post 请求的参数
String paramsStr = "";
for(String param : params.keySet()){
paramsStr += "&" + param + "=" + params.get(param);
}
if(!paramsStr.isEmpty()){
paramsStr = paramsStr.substring(1);
}
paramout.write(paramsStr);
paramout.flush();
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
String line;
the while ((Line = reader.readLine ()) = null!) {
// return the interface data
data.append (Line);
}
paramout.close ();
reader.Close ();
} the catch (Exception E) {
E .printStackTrace ();
return null;
}
return data.toString ();
}
// 2 calls the GET interface to an external server, obtain data returned Json.
@SuppressWarnings ({ "Resource"})
Private String the getData (the Map <String, String> the params, String URL) {
String Result = "";
// splicing the URL
String paramsStr = "";
List <String> = new new List the ArrayList <String> (params.keySet ());
for (int I = 0; I < list.size (); I ++) {
IF (I == 0) {
paramsStr = "?" + list.get(0) + "=" + params.get(list.get(0));
} else {
paramsStr += "&" + list.get(i) + "=" + params.get(list.get(i));
}
}
try {
HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet(url + paramsStr);
get.setHeader("charset", "UTF-8");
org.apache.http.HttpResponse response = client.execute(get);
if (200 == response.getStatusLine().getStatusCode()) {
result = EntityUtils.toString(response.getEntity(), "UTF-8");
}
} catch (ClientProtocolException e) {
e.printStackTrace();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
return result;
}
//3. 附录：引包
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.annotation.Resource;
import org.apache.commons.lang.StringUtils;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.freework.Constant;
import com.freework.base.exception.AppException;
import com.freework.freedbm.bean.Criteria;
import com.freework.freedbm.util.PageGridParam;
import com.freework.freedbm.util.PageTotalResult;