Spring RestTemplate HTTPS Connection Disable Certificate Validation (If possible for a given domain)
<bean id="httpClient" class="org.apache.commons.httpclient.HttpClient">
    <constructor-arg ref="httpClientParams"/>
    <property name="state" ref="httpState"/>
</bean>

<bean id="httpClientParams" class="org.apache.commons.httpclient.params.HttpClientParams">
    <property name="authenticationPreemptive" value="true"/>
    <property name="connectionManagerClass"
              value="org.apache.commons.httpclient.MultiThreadedHttpConnectionManager"/>
</bean>

<bean id="httpState" class="com.zz.tt.aa.CustomHttpState">
    <property name="credentials" ref="credentials"/>
</bean>

<bean id="credentials" class="org.apache.commons.httpclient.UsernamePasswordCredentials">
    <constructor-arg value="XXX"/>
    <constructor-arg value="YYY"/>
</bean>

<bean id="httpClientFactory" class="org.springframework.http.client.CommonsClientHttpRequestFactory">
    <constructor-arg ref="httpClient"/>
</bean>


<bean class="org.springframework.web.client.RestTemplate">
    <constructor-arg ref="httpClientFactory"/>
</bean>