目录
- 1 需求
- 2 工具类
1 需求
A 项目要调用B项目一共接口，远程调用，有的B接口是post请求，有的是get请求，所以写一个工具类，只需要传url 和参数就可以了
2 工具类
代码语言：javascript复制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.ConnectException;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.StandardCharsets;
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;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.utils.StringUtils;
/**
* 通用http发送方法
*
* @author ruoyi
*/
public class HttpUtils
{
private static final Logger log = LoggerFactory.getLogger(HttpUtils.class);
/**
* 向指定 URL 发送GET方法的请求，无参
*
* @param url 发送请求的 URL
* @return 所代表远程资源的响应结果
*/
public static String sendGet(String url)
{
return sendGet(url, StringUtils.EMPTY);
}
/**
* 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)
{
return sendGet(url, param, Constants.UTF8);
}
/**
* 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。
* @param contentType 编码类型
* @return 所代表远程资源的响应结果
*/
public static String sendGet(String url, String param, String contentType)
{
// 将连接返回的东西 ，保存在这个里面
StringBuilder result = new StringBuilder();
BufferedReader in = null;
try
{
String urlNameString = StringUtils.isNotBlank(param) ? url "?" param : url;
log.info("sendGet - {}", urlNameString);
// 创建连接对象
URL realUrl = new URL(urlNameString);
// 连接
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(), contentType));
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;
// 存放返回的数据
StringBuilder result = new StringBuilder();
try
{
log.info("sendPost - {}", url);
// 创建url 对象
URL realUrl = new URL(url);
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(), StandardCharsets.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();
}
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 && !"".equals(ret.trim()))
{
result.append(new String(ret.getBytes(StandardCharsets.ISO_8859_1), StandardCharsets.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;
}
}
}
