java验证百度证书问题

现在需要链接https:xxxxx.com网站,需要加载安全证书.
代码如何:
KeyStore ks = KeyStore.getInstance(“JKS”);
ks.load(new FileInputStream(“trustedCerts”),"passphrase”.toCharArray());
我已经下载了百度证书 baiduCer.cer
请问我改如何处理baiduCer.cer,替换掉“trustedCerts”
另外,"passphrase"如何处理.该用什么字符串代替.