这篇文章主要介绍了如何使用RestTemplate访问https实现SSL请求操作，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。
1、添加HttpsClientRequestFactory工具类
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;
/**
* TLS的三个作用：
* （1）身份认证
* 通过证书认证来确认对方的身份，防止中间人攻击
* （2）数据私密性
* 使用对称性密钥加密传输的数据，由于密钥只有客户端/服务端有，其他人无法窥探。
* （3）数据完整性
* 使用摘要算法对报文进行计算，收到消息后校验该值防止数据被篡改或丢失。
*
* 使用RestTemplate进行HTTPS请求访问：
* private static RestTemplate restTemplate = new RestTemplate(new HttpsClientRequestFactory());
*
*/
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();
}
}
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[]{"TLSv1.2"});
((SSLSocket) socket).setEnabledProtocols(new String[]{"TLSv1", "TLSv1.1", "TLSv1.2"});
return socket;
}
}
}
注意：服务端TLS版本要和客户端工具类中定义的一致。（TLSv1.2）
2、修改RestTemplate
在使用的时候，将
private static RestTemplate restTemplate = new RestTemplate();
改为：
private static RestTemplate restTemplate = new RestTemplate(new HttpsClientRequestFactory());
其他代码不变。
也可使用注入的方式：
@Configuration
public class ConfigBean {
@Bean
public RestTemplate getRestTemplate() {
return new RestTemplate(new HttpsClientRequestFactory());
}
}
3、访问https，抛出的异常
javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure解决方案
因为jdk中jce的安全机制导致报的错，需要去oracle官网下载对应的jce包替换jdk中的jce包。
方案一：替换jce包
目录 %JAVA_HOME%\jre\lib\security里的local_policy.jar,US_export_policy.jar JDK7 http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html JDK8 http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html // pub1:/home/myron/jdk1.7.0_80 % cd $JAVA_HOME/jre/lib/security/ //jce所在jdk的路径 US_export_policy.jar local_policy.jar
方案二：升级 JDK到1.8版本（推荐方式）
// pub1:/home/myron % vi .cshrc setenv JAVA_HOME /home/myron/jdk1.8.0_211 // pub1:/home/myron % source .cshrc // pub1:/home/myron % java -version java version "1.8.0_211"
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