Could not generate DH keypair

jdk1.6，调用https接口报错如下：

log4j:WARN No appenders could be found for logger (org.apache.http.client.protocol.RequestAddCookies).
log4j:WARN Please initialize the log4j system properly.
javax.net.ssl.SSLException: java.lang.RuntimeException: Could not generate DH keypair
	at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:190)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1747)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1708)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1691)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1222)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1199)
	at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:275)
	at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:254)
	at org.apache.http.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:123)
	at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:318)
	at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:363)
	at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:219)
	at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:195)
	at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:86)
	at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:108)
	at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)
	at com.thinkive.htqh.info.Test.fun1(Test.java:133)
	at com.thinkive.htqh.info.Test.main(Test.java:80)
Caused by: java.lang.RuntimeException: Could not generate DH keypair
	at com.sun.net.ssl.internal.ssl.DHCrypt.<init>(DHCrypt.java:114)
	at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverKeyExchange(ClientHandshaker.java:559)
	at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:186)
	at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Handshaker.java:593)
	at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Handshaker.java:529)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:943)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1188)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1215)
	... 15 more
Caused by: java.security.InvalidAlgorithmParameterException: Prime size must be multiple of 64, and can only range from 512 to 1024 (inclusive)
	at com.sun.crypto.provider.DHKeyPairGenerator.initialize(DashoA13*..)
	at java.security.KeyPairGenerator$Delegate.initialize(KeyPairGenerator.java:627)
	at com.sun.net.ssl.internal.ssl.DHCrypt.<init>(DHCrypt.java:107)
	... 22 more

在发起请求前，添加如下：

// jdk1.7及以下添加这句话，否则报错Could not generate DH keypair
Security.addProvider(new BouncyCastleProvider());

或将jdk版本改为1.8