java 调用第三方接口的时候，报405：
java.io.IOException: Server returned HTTP response code: 405 for URL:
参考 https://blog.csdn.net/qq_36213608/article/details/72829056 的解决方案
405 表示不允许此方法：对于请求所标识的资源，不允许使用请求行中所指定的方法。
看一下本地java代码中http的请求方法 和 第三方接口所允许的方法 是否一致，改成一致的就行。
常用的几个方法：GET POST PUT DELETE 等
代码段：
URL realUrl = new URL(url);
URLConnection urlConn = realUrl.openConnection();
// http的连接类
HttpURLConnection conn = (HttpURLConnection) urlConn;
conn.setRequestMethod("PUT");//请求方法 GET POST PUT DELETE 等
// 设置不用缓存
conn.setUseCaches(false);
conn.setRequestProperty("Accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");完整代码：
package com.ruoyi.common.utils.http;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.*;
import java.security.cert.X509Certificate;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* 通用http发送方法
*
* @author ruoyi
*/
public class HttpUtils
{
private static final Logger log = LoggerFactory.getLogger(HttpUtils.class);
public static void main(String[] args){
//流量系统 回调接口 PUT方式提交json数据
HttpUtils.sendWithJsonBody("PUT","http://111.111.111.111:8081/callback/approval","{\"agree\":true,\"approvalNo\":\"76\",\"approvalType\":\"RECHARGE_DISCOUNT_APPROVAL\",\"bizNo\":\"RE202002211430799517667770075001\",\"rejectReason\":\"通过\",\"source\":\"approval\"}");
}
/**
* 向指定 URL 发送GET方法的请求
*
* @param url 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 所代表远程资源的响应结果
*/
public static String sendGet(String url, String param)
{
StringBuilder result = new StringBuilder();
BufferedReader in = null;
try
{
String urlNameString = url + "?" + param;
log.info("sendGet - {}", urlNameString);
URL realUrl = new URL(urlNameString);
URLConnection connection = realUrl.openConnection();
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.connect();
in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
while ((line = in.readLine()) != null)
{
result.append(line);
}
log.info("recv - {}", result);
}
catch (ConnectException e)
{
log.error("调用HttpUtils.sendGet ConnectException, url=" + url + ",param=" + param, e);
}
catch (SocketTimeoutException e)
{
log.error("调用HttpUtils.sendGet SocketTimeoutException, url=" + url + ",param=" + param, e);
}
catch (IOException e)
{
log.error("调用HttpUtils.sendGet IOException, url=" + url + ",param=" + param, e);
}
catch (Exception e)
{
log.error("调用HttpsUtil.sendGet Exception, url=" + url + ",param=" + param, e);
}
finally
{
try
{
if (in != null)
{
in.close();
}
}
catch (Exception ex)
{
log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
}
}
return result.toString();
}
/**
* 向指定 URL 发送POST方法的请求
*
* @param url 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 所代表远程资源的响应结果
*/
public static String sendPost(String url, String param)
{
PrintWriter out = null;
BufferedReader in = null;
StringBuilder result = new StringBuilder();
try
{
String urlNameString = url + "?" + param;
log.info("sendPost - {}", urlNameString);
URL realUrl = new URL(urlNameString);
URLConnection conn = realUrl.openConnection();
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
conn.setRequestProperty("Accept-Charset", "utf-8");
conn.setRequestProperty("contentType", "utf-8");
conn.setDoOutput(true);
conn.setDoInput(true);
out = new PrintWriter(conn.getOutputStream());
out.print(param);
out.flush();
in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
String line;
while ((line = in.readLine()) != null)
{
result.append(line);
}
log.info("recv - {}", result);
}
catch (ConnectException e)
{
log.error("调用HttpUtils.sendPost ConnectException, url=" + url + ",param=" + param, e);
}
catch (SocketTimeoutException e)
{
log.error("调用HttpUtils.sendPost SocketTimeoutException, url=" + url + ",param=" + param, e);
}
catch (IOException e)
{
log.error("调用HttpUtils.sendPost IOException, url=" + url + ",param=" + param, e);
}
catch (Exception e)
{
log.error("调用HttpsUtil.sendPost Exception, url=" + url + ",param=" + param, e);
}
finally
{
try
{
if (out != null)
{
out.close();
}
if (in != null)
{
in.close();
}
}
catch (IOException ex)
{
log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
}
}
return result.toString();
}
/**
* 向指定 URL 发送请求 请求参数为json形式数据
*
* @param requestMethod GET POST PUT 等
* @param url 发送请求的 URL
* @param paramJson 请求参数，请求参数应该是 json格式数据。
* @return 所代表远程资源的响应结果
*/
public static String sendWithJsonBody(String requestMethod, String url, String paramJson)
{
PrintWriter out = null;
BufferedReader in = null;
StringBuilder result = new StringBuilder();
try
{
// String urlNameString = url + "?" + param;
log.info("sendPost - {}", url + "?" + paramJson);
URL realUrl = new URL(url);
URLConnection urlConn = realUrl.openConnection();
// http的连接类
HttpURLConnection conn = (HttpURLConnection) urlConn;
conn.setRequestMethod(requestMethod);
// 设置不用缓存
conn.setUseCaches(false);
conn.setRequestProperty("Accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
// conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// conn.setRequestProperty("Accept-Charset", "utf-8");
// 设置文件字符集:
conn.setRequestProperty("Charset", "UTF-8");
//转换为字节数组
byte[] data = (paramJson).getBytes();
// 设置文件长度
conn.setRequestProperty("Content-Length", String.valueOf(data.length));
// 设置文件类型:
conn.setRequestProperty("Content-Type", "application/json");
// 设置请求内容类型
// conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
conn.setDoOutput(true);
conn.setDoInput(true);
// 开始连接请求
// conn.connect();
out = new PrintWriter(conn.getOutputStream());
out.print(paramJson);
out.flush();
in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
String line;
while ((line = in.readLine()) != null)
{
result.append(line);
}
log.info("recv - {}", result);
}
catch (ConnectException e)
{
log.error("调用HttpUtils.sendPost ConnectException, url=" + url + ",paramJson=" + paramJson, e);
}
catch (SocketTimeoutException e)
{
log.error("调用HttpUtils.sendPost SocketTimeoutException, url=" + url + ",paramJson=" + paramJson, e);
}
catch (IOException e)
{
log.error("调用HttpUtils.sendPost IOException, url=" + url + ",paramJson=" + paramJson, e);
}
catch (Exception e)
{
log.error("调用HttpsUtil.sendPost Exception, url=" + url + ",paramJson=" + paramJson, e);
}
finally
{
try
{
if (out != null)
{
out.close();
}
if (in != null)
{
in.close();
}
}
catch (IOException ex)
{
log.error("调用in.close Exception, url=" + url + ",paramJson=" + paramJson, ex);
}
}
return result.toString();
}
public static String sendSSLPost(String url, String param)
{
StringBuilder result = new StringBuilder();
String urlNameString = url + "?" + param;
try
{
log.info("sendSSLPost - {}", urlNameString);
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, new TrustManager[] { new TrustAnyTrustManager() }, new java.security.SecureRandom());
URL console = new URL(urlNameString);
HttpsURLConnection conn = (HttpsURLConnection) console.openConnection();
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
conn.setRequestProperty("Accept-Charset", "utf-8");
conn.setRequestProperty("contentType", "utf-8");
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setSSLSocketFactory(sc.getSocketFactory());
conn.setHostnameVerifier(new TrustAnyHostnameVerifier());
conn.connect();
InputStream is = conn.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String ret = "";
while ((ret = br.readLine()) != null)
{
if (ret != null && !ret.trim().equals(""))
{
result.append(new String(ret.getBytes("ISO-8859-1"), "utf-8"));
}
}
log.info("recv - {}", result);
conn.disconnect();
br.close();
}
catch (ConnectException e)
{
log.error("调用HttpUtils.sendSSLPost ConnectException, url=" + url + ",param=" + param, e);
}
catch (SocketTimeoutException e)
{
log.error("调用HttpUtils.sendSSLPost SocketTimeoutException, url=" + url + ",param=" + param, e);
}
catch (IOException e)
{
log.error("调用HttpUtils.sendSSLPost IOException, url=" + url + ",param=" + param, e);
}
catch (Exception e)
{
log.error("调用HttpsUtil.sendSSLPost Exception, url=" + url + ",param=" + param, e);
}
return result.toString();
}
private static class TrustAnyTrustManager implements X509TrustManager
{
@Override
public void checkClientTrusted(X509Certificate[] chain, String authType)
{
}
@Override
public void checkServerTrusted(X509Certificate[] chain, String authType)
{
}
@Override
public X509Certificate[] getAcceptedIssuers()
{
return new X509Certificate[] {};
}
}
private static class TrustAnyHostnameVerifier implements HostnameVerifier
{
@Override
public boolean verify(String hostname, SSLSession session)
{
return true;
}
}
}