buf.append(targetClassesDir.getAbsolutePath());
        }
        // WEB-INF/lib
        appendJarFile(cpSeparator, buf, new File(servletContext.getRealPath("/WEB-INF/lib")),
                "WEB-INF" + File.separator + "lib" + File.separator);
        // WEB-INF/env/suggest/lib
        appendJarFile(cpSeparator, buf, new File(servletContext.getRealPath("/WEB-INF/env/" + getExecuteType() + "/lib")),

            buf.append(targetClassesDir.getAbsolutePath());
        }
        // WEB-INF/lib
        appendJarFile(cpSeparator, buf, new File(servletContext.getRealPath("/WEB-INF/lib")),
                "WEB-INF" + File.separator + "lib" + File.separator);
        // WEB-INF/env/thumbnail/lib
        appendJarFile(cpSeparator, buf, new File(servletContext.getRealPath("/WEB-INF/env/" + getExecuteType() + "/lib")),

            buf.append(targetClassesDir.getAbsolutePath());
        }
        // WEB-INF/lib
        appendJarFile(cpSeparator, buf, new File(servletContext.getRealPath("/WEB-INF/lib")),
                "WEB-INF" + File.separator + "lib" + File.separator);
        // WEB-INF/env/crawler/lib
        appendJarFile(cpSeparator, buf, new File(servletContext.getRealPath("/WEB-INF/env/" + getExecuteType() + "/lib")),

     * @param buf the StringBuilder to append to
     * @param libDir the directory containing JAR files
     * @param basePath the base path to prepend to JAR file names
     */
    protected void appendJarFile(final String cpSeparator, final StringBuilder buf, final File libDir, final String basePath) {
        final File[] jarFiles = libDir.listFiles((FilenameFilter) (dir, name) -> name.toLowerCase().endsWith(".jar"));