1.RestTemplate
最近一直在做接口对接遇到很多问题,查询了大量资料
不知道引用的谁的,找了个好几个弄出来的.
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.client.RestTemplate;
import java.nio.charset.StandardCharsets;
import java.util.Map;
public class HttpUtil {
/**
* 通过http协议发送post
* @param url
* @param param
*/
public static String sendPostHttp(String url, Map<String, Object> param){
RestTemplate restTemplate = new RestTemplate();
//编码为utf-8
restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8));
HttpHeaders headers = new HttpHeaders();
//定义请求参数类型，这里用json所以是MediaType.APPLICATION_JSON
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<Map<String, Object>> request = new HttpEntity<Map<String, Object>>(param, headers);
ResponseEntity<String> entity = restTemplate.postForEntity(url, request, String.class);
//获取3方接口返回的数据通过entity.getBody();它返回的是一个字符串；
return entity.getBody();
}
/**
* 通过http协议发送get
* @param url
* @param param
*/
public static String sendGetHttp(String url, Map<String, Object> param){
RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8));
//处理参数
StringBuilder builder = new StringBuilder();
if (param != null) {
for (String key : param.keySet()) {
builder.append(key + "=" + param.get(key) + "&");
}
}
ResponseEntity<String> res = restTemplate.getForEntity(url+"?"+builder, String.class);
return res.getBody();
}
/**
* 使用https协议发送post
* @param url 请求地址
* @param param 参数
*/
public static String sendPostHttps(String url, Map<String, String> param) {
RestTemplate restTemplate = new RestTemplate(new HttpsClientRequestFactory());
//编码为utf-8
restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8));
HttpHeaders headers = new HttpHeaders();
//定义请求参数类型，这里用json所以是MediaType.APPLICATION_JSON
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<Map<String, String>> request = new HttpEntity<Map<String, String>>(param, headers);
ResponseEntity<String> entity = restTemplate.postForEntity(url, request, String.class);
//获取3方接口返回的数据通过entity.getBody();它返回的是一个字符串；
return entity.getBody();
}
/**
* 使用https协议发送get
* @param url 请求地址
* @param param 参数
*/
public static String sendGetHttps(String url, Map<String, Object> param) {
RestTemplate restTemplate = new RestTemplate(new HttpsClientRequestFactory());
//编码为utf-8
restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8));
//处理参数
StringBuilder builder = new StringBuilder();
if (param != null) {
for (String key : param.keySet()) {
builder.append(key + "=" + param.get(key) + "&");
}
}
ResponseEntity<String> res = restTemplate.getForEntity(url+"?"+builder, String.class);
return res.getBody();
}
}
这个类需要配合下面的类去使用
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import javax.net.ssl.*;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.Socket;
import java.security.cert.X509Certificate;
/**
* 声明:此代码摘录自https://blog.csdn.net/wltsysterm/article/details/80977455
*/
public class HttpsClientRequestFactory extends SimpleClientHttpRequestFactory {
@Override
protected void prepareConnection(HttpURLConnection connection, String httpMethod) {
try {
if (!(connection instanceof HttpsURLConnection)) {
throw new RuntimeException("An instance of HttpsURLConnection is expected");
}
HttpsURLConnection httpsConnection = (HttpsURLConnection) connection;
TrustManager[] trustAllCerts = new TrustManager[]{
new X509TrustManager() {
@Override
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
return null;
}
@Override
public void checkClientTrusted(X509Certificate[] certs, String authType) {
}
@Override
public void checkServerTrusted(X509Certificate[] certs, String authType) {
}
}
};
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, trustAllCerts, new java.security.SecureRandom());
httpsConnection.setSSLSocketFactory(new MyCustomSSLSocketFactory(sslContext.getSocketFactory()));
httpsConnection.setHostnameVerifier(new HostnameVerifier() {
@Override
public boolean verify(String s, SSLSession sslSession) {
return true;
}
});
super.prepareConnection(httpsConnection, httpMethod);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* We need to invoke sslSocket.setEnabledProtocols(new String[] {"SSLv3"});
* see http://www.oracle.com/technetwork/java/javase/documentation/cve-2014-3566-2342133.html (Java 8 section)
*/
// SSLSocketFactory用于创建 SSLSockets
private static class MyCustomSSLSocketFactory extends SSLSocketFactory {
private final SSLSocketFactory delegate;
public MyCustomSSLSocketFactory(SSLSocketFactory delegate) {
this.delegate = delegate;
}
// 返回默认启用的密码套件。除非一个列表启用，对SSL连接的握手会使用这些密码套件。
// 这些默认的服务的最低质量要求保密保护和服务器身份验证
@Override
public String[] getDefaultCipherSuites() {
return delegate.getDefaultCipherSuites();
}
// 返回的密码套件可用于SSL连接启用的名字
@Override
public String[] getSupportedCipherSuites() {
return delegate.getSupportedCipherSuites();
}
@Override
public Socket createSocket(final Socket socket, final String host, final int port,
final boolean autoClose) throws IOException {
final Socket underlyingSocket = delegate.createSocket(socket, host, port, autoClose);
return overrideProtocol(underlyingSocket);
}
@Override
public Socket createSocket(final String host, final int port) throws IOException {
final Socket underlyingSocket = delegate.createSocket(host, port);
return overrideProtocol(underlyingSocket);
}
@Override
public Socket createSocket(final String host, final int port, final InetAddress localAddress,
final int localPort) throws
IOException {
final Socket underlyingSocket = delegate.createSocket(host, port, localAddress, localPort);
return overrideProtocol(underlyingSocket);
}
@Override
public Socket createSocket(final InetAddress host, final int port) throws IOException {
final Socket underlyingSocket = delegate.createSocket(host, port);
return overrideProtocol(underlyingSocket);
}
@Override
public Socket createSocket(final InetAddress host, final int port, final InetAddress localAddress,
final int localPort) throws
IOException {
final Socket underlyingSocket = delegate.createSocket(host, port, localAddress, localPort);
return overrideProtocol(underlyingSocket);
}
private Socket overrideProtocol(final Socket socket) {
if (!(socket instanceof SSLSocket)) {
throw new RuntimeException("An instance of SSLSocket is expected");
}
((SSLSocket) socket).setEnabledProtocols(new String[]{"TLSv1"});
return socket;
}
}
}
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