import org.apache.tomcat.util.net.Constants; //导入依赖的package包/类
/**
 * Load the collection of CRLs.
 *
 */
protected Collection<? extends CRL> getCRLs(String crlf)
    throws IOException, CRLException, CertificateException {

    File crlFile = new File(crlf);
    if( !crlFile.isAbsolute() ) {
        crlFile = new File(
                System.getProperty(Constants.CATALINA_BASE_PROP), crlf);
    }
    Collection<? extends CRL> crls = null;
    InputStream is = null;
    try {
        CertificateFactory cf = CertificateFactory.getInstance("X.509");
        is = new FileInputStream(crlFile);
        crls = cf.generateCRLs(is);
    } catch(IOException iex) {
        throw iex;
    } catch(CRLException crle) {
        throw crle;
    } catch(CertificateException ce) {
        throw ce;
    } finally {
        if(is != null) {
            try{
                is.close();
            } catch(Exception ex) {
                // Ignore
            }
        }
    }
    return crls;
}
 

import org.apache.tomcat.util.net.Constants; //导入依赖的package包/类
/**
 * Load the collection of CRLs.
 * 
 */
protected Collection<? extends CRL> getCRLs(String crlf) 
    throws IOException, CRLException, CertificateException {

    File crlFile = new File(crlf);
    if( !crlFile.isAbsolute() ) {
        crlFile = new File(
                System.getProperty(Constants.CATALINA_BASE_PROP), crlf);
    }
    Collection<? extends CRL> crls = null;
    InputStream is = null;
    try {
        CertificateFactory cf = CertificateFactory.getInstance("X.509");
        is = new FileInputStream(crlFile);
        crls = cf.generateCRLs(is);
    } catch(IOException iex) {
        throw iex;
    } catch(CRLException crle) {
        throw crle;
    } catch(CertificateException ce) {
        throw ce;
    } finally { 
        if(is != null) {
            try{
                is.close();
            } catch(Exception ex) {
                // Ignore
            }
        }
    }
    return crls;
}