tomcat web.xml文件加载

叁歲伎倆 2021-09-23 03:44 320阅读 0赞

tomcat web.xml文件加载主要依靠java\\org\\apache\\catalina\\startup\\ContextConfig.java中函数

ServletContext servletContext = context.getServletContext();
            try {
                if (servletContext != null) {
                    altDDName = (String)servletContext.getAttribute(Globals.ALT_DD_ATTR);
                    if (altDDName != null) {
                        try {
                            stream = new FileInputStream(altDDName);
                            url = new File(altDDName).toURI().toURL();
                        } catch (FileNotFoundException e) {
                            log.error(sm.getString("contextConfig.altDDNotFound",
                                                   altDDName));
                        } catch (MalformedURLException e) {
                            log.error(sm.getString("contextConfig.applicationUrl"));
                        }
                    }
                    else {
                        stream = servletCo
                        ntext.getResourceAsStream
                            (Constants.ApplicationWebXml);
                        try {
                            url = servletContext.getResource(
                                    Constants.ApplicationWebXml);
                        } catch (MalformedURLException e) {
                            log.error(sm.getString("contextConfig.applicationUrl"));
                        }
                    }
                }
                if (stream == null || url == null) {
                    if (log.isDebugEnabled()) {
                        log.debug(sm.getString("contextConfig.applicationMissing") + " " + context);
                    }
                } else {
                    source = new InputSource(url.toExternalForm());
                    source.setByteStream(stream);
                }
            } finally {
                if (source == null && stream != null) {
                    try {
                        stream.close();
                    } catch (IOException e) {
                        // Ignore
                    }
                }
            }
    
            return source;
        }

Constants.ApplicationWebXml定义如下：

public static final String TomcatWebXml = "/WEB-INF/tomcat-web.xml";