拦截文件策略功能更改

src/main/java/com/nis/util/FileUtils.java

@@ -11,6 +11,8 @@ import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.URLEncoder;
 import java.security.MessageDigest;
+import java.security.cert.CertificateFactory;
+import java.security.cert.X509Certificate;
 import java.util.Enumeration;
 
 import javax.servlet.ServletOutputStream;
@@ -747,6 +749,20 @@ public class FileUtils extends org.apache.commons.io.FileUtils {
 			}
 		}
 	}
+	/**
+	 * 获取公钥证书
+	 * @param inputStream
+	 * @return
+	 */
+	public static X509Certificate getCertificateInfo(InputStream inputStream) throws Exception{
+		X509Certificate ca = null;
+		CertificateFactory certificateFactory = CertificateFactory
+				.getInstance("X.509");
+		ca= (X509Certificate) certificateFactory
+				.generateCertificate(inputStream);
+		return ca;
+	}
+	
 	/**
 	 * 计算文件MD5
 	 * @param file