前项目使用这种HTTP的方式进行数据交互，目前已更换数据交互方式，但是作为接口提供调用来说还是比较简洁高效的：
总体流程就是：
1、发送HTTP请求
2、获取返回的JSON对象
3、JSON转换
package com.xx;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import .HttpURLConnection;
import .MalformedURLException;
import .URL;
import .URLConnection;
import java.util.List;
import java.util.Map;
public class SendGetPost {
/**
* 发送get请求
* 参数设置：？param=val¶m2=val2
* @author TF
*
*/
public static String sendGet(String url){
String result = "";
BufferedReader in = null;
try {
//创建URL对象、
URL urlGet =new URL(url);
//打开URL连接
URLConnection connection = urlGet.openConnection();
//设置请求头信息
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent","Mozilla/5.0 (Windows NT 6.1; WOW64; rv:47.0) Gecko/0101 Firefox/47.0");
connection.setRequestProperty("contentType", "UTF-8");
//建立连接
connection.connect();
// 获取所有响应头字段
Map> map = connection.getHeaderFields();
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(connection.getInputStream(),"UTF-8"));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
/**
* 发送post请求
* 参数设置param1=val1&m2=val2
*
* */
public static String sendPost(String url,String param){
String result = "";
BufferedReader in = null;
OutputStreamWriter out = null;
try {
//创建URL对象、
URL urlPost = new URL(url);
//打开URL连接
URLConnection connection = urlPost.openConnection();
HttpURLConnection conn = (HttpURLConnection) connection;
// 设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent","Mozilla/5.0 (Windows NT 6.1; WOW64; rv:47.0) Gecko/0101 Firefox/47.0");
conn.setRequestMethod("POST");
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
// 获取URLConnection对象对应的输出流
out = new OutputStreamWriter(conn.getOutputStream(),"UTF-8");
// 发送请求参数
out.write(param);
// 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;
}
} catch (MalformedURLException e) {
System.out.println("error");
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
}
