各種形式的JAVA網絡請求工具類POST/GET/PUT
package com.utils;
import lombok.extern.slf4j.Slf4j;
import okhttp3.*;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
@Slf4j
public class HttpRequest {
/**
* 向指定 URL 發送POST方法的請求
*
* @param url
* 發送請求的 URL
* @param param
* 請求參數，請求參數應該是 name1=value1&name2=value2 的形式。
* @return 所代表遠程資源的響應結果
*/
public static String sendPost(String url, String param) {
LogUtils.debug("url:" + url);
LogUtils.debug("param:" + param);
PrintWriter out = null;
BufferedReader in = null;
StringBuilder sb = new StringBuilder();
try {
URL realUrl = new URL(url);
// 打開和URL之間的連接
URLConnection conn = realUrl.openConnection();
// 設置通用的請求屬性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 發送POST請求必須設置如下兩行
conn.setDoOutput(true);
conn.setDoInput(true);
// 獲取URLConnection對象對應的輸出流
out = new PrintWriter(conn.getOutputStream());
// 發送請求參數
out.print(param);
// flush輸出流的緩衝
out.flush();
// 定義BufferedReader輸入流來讀取URL的響應
in = new BufferedReader(
new InputStreamReader(conn.getInputStream(), "UTF-8"));
String line;
while ((line = in.readLine()) != null) {
sb.append(line);
}
} catch (Exception e) {
e.printStackTrace();
CommonMail.sendException("http post", "參數:"+param +"/n"+DealString.getFromException(e), 1);
}
// 使用finally塊來關閉輸出流、輸入流
finally {
try {
if (out != null) {
out.close();
}
if (in != null) {
in.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
return sb.toString();
}
/**
* 向指定URL發送GET方法的請求
*
* @param url 發送請求的URL
* @param param 請求參數，請求參數應該是 name1=value1&name2=value2 的形式。
* @return URL 所代表遠程資源的響應結果
*/
public static String sendGet(String url, Map<String, String> param) {
StringBuilder sb = new StringBuilder();
BufferedReader in = null;
try {
String urlNameString = url + "?" + getParam(param);
URL realUrl = new URL(urlNameString);
// 打開和URL之間的連接
URLConnection connection = realUrl.openConnection();
// 設置通用的請求屬性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; UTF-8");
// 建立實際的連接
connection.connect();
// 獲取所有響應頭字段
Map<String, List<String>> map = connection.getHeaderFields();
// 遍歷所有的響應頭字段
map.forEach((k,v)->{
log.info("{}--->{}",k,v);
});
// 定義 BufferedReader輸入流來讀取URL的響應
in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
String line;
while ((line = in.readLine()) != null) {
sb.append(line);
}
} catch (Exception e) {
LogUtils.debug("發送GET請求出現異常！" + e);
e.printStackTrace();
}
// 使用finally塊來關閉輸入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return sb.toString();
}
/**
* 向指定URL發送GET方法的請求 application/json
*
* @param url
* @param json
* @return
*/
public static String sendPostWithJson(String url, String json) {
String returnValue = "接口調用失敗";
CloseableHttpClient httpClient = HttpClients.createDefault();
ResponseHandler<String> responseHandler = new BasicResponseHandler();
try {
//第一步：創建HttpClient對象
httpClient = HttpClients.createDefault();
//第二步：創建httpPost對象
HttpPost httpPost = new HttpPost(url);
//第三步：給httpPost設置JSON格式的參數
StringEntity requestEntity = new StringEntity(json, "utf-8");
requestEntity.setContentEncoding("UTF-8");
httpPost.setHeader("Content-type", "application/json");
httpPost.setEntity(requestEntity);
//第四步：發送HttpPost請求，獲取返回值
returnValue = httpClient.execute(httpPost, responseHandler);
} catch (Exception e) {
e.printStackTrace();
CommonMail.sendException("sendPostWithJson請求失敗!", "url=" + url + "\r\njson=" + json + "\r\n" + DealString.getFromException(e), 1);
} finally {
try {
httpClient.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//第五步：處理返回值
return returnValue;
}
/**
* 向指定 URL 發送POST方法的請求
*
* @param url
* 發送請求的 URL
* @param param
* 請求參數，請求參數應該是Map的形式,請在key爲參數，value爲值。
* @return 所代表遠程資源的響應結果
* @throws Exception
*/
public static String sendPost(String url, Map<String, String> param) throws Exception {
PrintWriter out = null;
BufferedReader in = null;
StringBuffer result = new StringBuffer();
try {
URL realUrl = new URL(url);
// 打開和URL之間的連接
URLConnection conn = realUrl.openConnection();
HttpURLConnection httpUrlConn = (HttpURLConnection) conn;
// 設置通用的請求屬性
httpUrlConn.setRequestProperty("accept", "*/*");
httpUrlConn.setRequestProperty("connection", "Keep-Alive");
httpUrlConn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 發送POST請求必須設置如下兩行
httpUrlConn.setDoOutput(true);
httpUrlConn.setDoInput(true);
httpUrlConn.setRequestMethod("POST");
httpUrlConn.setReadTimeout(5000);
httpUrlConn.setConnectTimeout(5000);
// 獲取URLConnection對象對應的輸出流
out = new PrintWriter(httpUrlConn.getOutputStream());
// 發送請求參數
out.print(getParam(param));
// flush輸出流的緩衝
out.flush();
// 定義BufferedReader輸入流來讀取URL的響應
in = new BufferedReader(
new InputStreamReader(httpUrlConn.getInputStream(),"UTF-8"));
String line;
while ((line = in.readLine()) != null) {
result.append(line);
}
} catch (Exception e) {
LogUtils.debug("發送 POST 請求出現異常！"+e);
e.printStackTrace();
throw new Exception("發送 POST 請求出現異常！",e);
}
//使用finally塊來關閉輸出流、輸入流
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex){
ex.printStackTrace();
}
}
return result.toString();
}
/**
* 向指定 URL 發送PUT方法的請求
* @param url
* @param json
* @return
*/
public static String sendPutWithJson(String url, String json) {
String returnValue = "";
CloseableHttpClient httpClient = HttpClients.createDefault();
ResponseHandler<String> responseHandler = new BasicResponseHandler();
try {
//第一步：創建HttpClient對象
httpClient = HttpClients.createDefault();
//第二步：創建httpPost對象
HttpPut httpPost = new HttpPut(url);
//第三步：給httpPost設置JSON格式的參數
StringEntity requestEntity = new StringEntity(json, "utf-8");
requestEntity.setContentEncoding("UTF-8");
httpPost.setHeader("Content-type", "application/json");
httpPost.setEntity(requestEntity);
//第四步：發送HttpPost請求，獲取返回值
returnValue = httpClient.execute(httpPost, responseHandler);
} catch (Exception e) {
e.printStackTrace();
CommonMail.sendException("sendPostWithJson請求失敗!", "url=" + url + "\r\njson=" + json + "\r\n" + DealString.getFromException(e), 1);
} finally {
try {
httpClient.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//第五步：處理返回值
return returnValue;
}
public static String sendXiMaPost(String url, Map<String, String> paramMap) {
String param = getParam(paramMap);
return sendXiMaPost(url, param);
}
/**
* 向指定 URL 發送POST方法的請求
*
* @param url 發送請求的 URL
* @param param 請求參數，請求參數應該是 name1=value1&name2=value2 的形式。
* @return 所代表遠程資源的響應結果
*/
public static String sendXiMaPost(String url, String param) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打開和URL之間的連接
HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
// 設置通用的請求屬性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 發送POST請求必須設置如下兩行
conn.setDoOutput(true);
conn.setDoInput(true);
// 獲取URLConnection對象對應的輸出流
out = new PrintWriter(new OutputStreamWriter(conn.getOutputStream(), "utf-8"));
// 發送請求參數
out.print(param);
// flush輸出流的緩衝
out.flush();
//判斷返回碼
if (conn.getResponseCode() == 401 || conn.getResponseCode() == 400) {
// return "";
in = new BufferedReader(new InputStreamReader(conn.getErrorStream(), "UTF-8"));
} else {
// 定義BufferedReader輸入流來讀取URL的響應
in = new BufferedReader(
new InputStreamReader(conn.getInputStream(), "UTF-8"));
}
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
e.printStackTrace();
CommonMail.sendException("http post", "參數:" + param + "/n" + DealString.getFromException(e), 1);
}
// 使用finally塊來關閉輸出流、輸入流
finally {
try {
if (out != null) {
out.close();
}
if (in != null) {
in.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
return result;
}
/**
* 構建請求參數
* @param params
* @return
*/
public static String getParam(Map<String, String> params) {
StringBuffer sb = new StringBuffer();
String str = "";
if(params!=null){
for (Map.Entry<String, String> e : params.entrySet()) {
sb.append(e.getKey());
sb.append("=");
sb.append(e.getValue());
sb.append("&");
}
str = sb.substring(0, sb.length() - 1);
}
return str;
}
public static String encodeURL(String url){
return url.replace("%", "%25").replace("+", "%2B").replace(" ", "%20").replace("/", "%2F")
.replace("?", "%3F").replace("#", "%23").replace("&", "%26").replace("=", "%3D")
.replace(":", "%3A");
}
public static String sendPostJSON(String url, String param) throws Exception {
OkHttpClient client = new OkHttpClient.Builder()
.connectTimeout(10, TimeUnit.SECONDS)
.retryOnConnectionFailure(Boolean.FALSE)
.readTimeout(10, TimeUnit.SECONDS)
.writeTimeout(50, TimeUnit.SECONDS)
.build();
RequestBody body = RequestBody.create(MediaType.parse("application/json"), param);
Request.Builder request = new Request.Builder().post(body).url(url);
Response response = client.newCall(request.build()).execute();
InputStream is = response.body().byteStream();
String s = new String(readInputStream(is));
LogUtils.debug(s);
return s;
}
private static byte[] readInputStream(InputStream inStream) throws Exception {
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len;
while ((len = inStream.read(buffer)) != -1) {
outStream.write(buffer, 0, len);
}
inStream.close();
return outStream.toByteArray();
}
}