java调用第三方接口（项目亲测）
import com.alibaba.fastjson.JSONObject;
import com.aliyun.openservices.eas.predict.http.HttpConfig;
import com.aliyun.openservices.eas.predict.http.PredictClient;
import lombok.extern.slf4j.Slf4j;
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.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Map;
/**
* @author buH
* #data 2020/12/4 10:07
* 接口工具类
*/
@Slf4j
public class HttpUtil {
/**
* post请求
*
* @param URL 请求url
* @param param 参数
* @param token 请求携带的token（如果需要）
*/
public static String doPost(String URL, JSONObject param, String token) {
log.info("request address:"+URL);
OutputStreamWriter out = null;
BufferedReader in = null;
StringBuilder result = new StringBuilder();
HttpURLConnection conn = null;
try {
java.net.URL url = new URL(URL);
conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
if (token != null) {
conn.setRequestProperty("token", token);
}
//获取输出流
if (param != null) {
out = new OutputStreamWriter(conn.getOutputStream());
String jsonStr = param.toString();
out.write(jsonStr);
out.flush();
out.close();
}
//取得输入流，并使用Reader读取
if (200 == conn.getResponseCode()) {
in = new BufferedReader(new InputStreamReader(conn.getInputStream(), StandardCharsets.UTF_8));
String line;
while ((line = in.readLine()) != null) {
result.append(line);
}
} else {
System.out.println("ResponseCode is an error code:" + conn.getResponseCode());
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (out != null) {
out.close();
}
if (in != null) {
in.close();
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
return result.toString();
}
/**
* 向指定URL发送GET方法的请求
*
* @param baseUrl 发送请求的URL
* @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @return result 所代表远程资源的响应结果
*/
public static String doGet(String baseUrl, String param) {
String result = "";
BufferedReader in = null;
try {
String urlNameString =baseUrl;
if(param!=null){
urlNameString = baseUrl + "?" + param;
}
URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接
HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
// 设置通用的请求属性
connection.setRequestProperty("Content-Type", "text/plain; charset=utf-8");
connection.setRequestProperty("Charsert", "ISO-8859-1");
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立实际的连接
connection.connect();
if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
// 获取所有响应头字段
Map<String, List<String>> map = connection.getHeaderFields();
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
}else{
return "Code="+connection.getResponseCode();
}
} catch (Exception e) {
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}