RestTemplate中的三种请求方式postForObject、postForEntity、exchange
启动类配置参数
@SpringBootApplication
@EnableDiscoveryClient
public class HelloworldApplication {
public static void main(String[] args) {
SpringApplication.run(HelloworldApplication.class, args);
}
@Bean
@LoadBalanced
RestTemplate restTemplate() {
return new RestTemplate();
}
}
测试类
public static void main(String[] args) {
RestTemplate template = new RestTemplate();
String url = "http://127.0.0.1:12813/member/c2/f02";
// 封装参数，千万不要替换为Map与HashMap，否则参数无法传递
MultiValueMap<String, Object> paramMap = new LinkedMultiValueMap<String, Object>();
paramMap.add("dt", "{\"uscInfo\":{\"member\":\"123\",\"isEncrypt\":0,\"tenant\":\"456\",\"devciceIp\":\"789\",\"devciceId\":\"147\"},\"quInfo\":{\"account\":\"258\",\"pushId\":\"369\",\"optSys\":\"159\",\"code\":\"357\",\"addressProvince\":\"153\",\"addressRegion\":\"183\",\"businessType\":\"486\",\"addressCity\":\"759\",\"codeKey\":\"726\"} }");
postForObject(template, paramMap, url);
postForEntity(template, paramMap, url);
exchange(template, paramMap, url);
}
public static String postForObject(RestTemplate template,MultiValueMap<String, Object> paramMap,String url){
// 1、使用postForObject请求接口
String result = template.postForObject(url, paramMap, String.class);
System.out.println("result1==================" + result);
return result;
}
public static String postForEntity(RestTemplate template,MultiValueMap<String, Object> paramMap,String url){
HttpHeaders headers = new HttpHeaders();
HttpEntity<MultiValueMap<String, Object>> httpEntity = new HttpEntity<MultiValueMap<String, Object>>(paramMap,headers);
ResponseEntity<String> response2 = template.postForEntity(url, httpEntity, String.class);
System.out.println("result2====================" + response2.getBody());
return response2.getBody();
}
public static String exchange(RestTemplate template,MultiValueMap<String, Object> paramMap,String url) {
HttpHeaders headers = new HttpHeaders();
HttpEntity<MultiValueMap<String, Object>> httpEntity = new HttpEntity<MultiValueMap<String, Object>>(paramMap,headers);
ResponseEntity<String> response3 = template.exchange(url, HttpMethod.POST, httpEntity, String.class);
System.out.println("result3====================" + response3.getBody());
return response3.getBody();
}
附加1：请求类型为jsonString
RestTemplate template = new RestTemplate();
String url = "http://127.0.0.1:12813/member/c2/f02";
/*MultiValueMap paramMap = new LinkedMultiValueMap();
paramMap.add("dt", req);*/
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
headers.add("t", "she0827e6e83744a6b89624ae053dfc847");
HttpEntity<String> httpEntity = new HttpEntity<String>(req,headers);
ResponseEntity<String> response2 = template.postForEntity(url, httpEntity, String.class);
return response2.getBody();
附加2：发起https请求（HTTPS请求 = 超文本传输协议HTTP + 安全套接字层SSL）
先创建SimpleClientHttpRequestFactory的实现类HttpsClientRequestFactory.java
package com.sgcc.service.impl;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.Socket;
import java.security.cert.CertificateException;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
/**
* 声明:此代码摘录自https://blog.csdn.net/wltsysterm/article/details/80977455
* 声明:关于Socket的相关知识,本人会在后面的闲暇时间进行学习整理,请持续关注博客更新
*/
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(java.security.cert.X509Certificate[] arg0, String arg1)
throws CertificateException {
// TODO Auto-generated method stub
}
@Override
public void checkServerTrusted(java.security.cert.X509Certificate[] arg0, String arg1)
throws CertificateException {
// TODO Auto-generated method stub
}
}
};
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;
}
}
}
再编写调用方法
public String RestTemplate(String req){
RestTemplate template = new RestTemplate(new HttpsClientRequestFactory());
String url = "https://127.0.0.1:12813/member/c2/f02";
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
headers.add("t", "sh0fe976d6c1474ca7b185dbd87e201f13");
HttpEntity<String> httpEntity = new HttpEntity<String>(req,headers);
ResponseEntity<String> response2 = template.postForEntity(url, httpEntity, String.class);
return response2.getBody();
}