各位帮我看看下面的代码

    /**
     * 获取客户请求处理映射表
     * put your documentation comment here
     * @param root
     * @return
     */
    public static HashMap getRequestMappings (Element root) {
        HashMap urlMappings = new HashMap();
        NodeList list = root.getElementsByTagName(URL_MAPPING);
        for (int loop = 0; loop < list.getLength(); loop++) {
            Node node = list.item(loop);
            if (node != null) {
                String url = "";
                String screen = null;
                String useRequestHandlerString = null;
                String useFlowHandlerString = null;
                String requiresSigninString = null;
                String flowHandler = null;
                String requestHandler = null;
                HashMap resultMappings = null;
                boolean useFlowHandler = false;
                boolean useRequestHandler = false;
                boolean requiresSignin = false;
                if (node instanceof Element) {
                    Element element = ((Element)node);
                    url = element.getAttribute(URL);
                    screen = element.getAttribute(NEXT_SCREEN);
                    useRequestHandlerString = element.getAttribute(USE_REQUEST_HANDLER);
                    useFlowHandlerString = element.getAttribute(USE_FLOW_HANDLER);
                    requiresSigninString = element.getAttribute(REQUIRES_SIGNIN);
                }
                if ((useRequestHandlerString != null) && useRequestHandlerString.equals("true"))
                    useRequestHandler = true;
                if (useRequestHandler) {
                    requestHandler = getSubTagValue(node, REQUEST_HANDLER_CLASS);
                }
                if ((requiresSigninString != null) && requiresSigninString.equals("true"))
                    requiresSignin = true;
                
                if ((useFlowHandlerString != null) && useFlowHandlerString.equals("true"))
                    useFlowHandler = true;
                
                if ((useFlowHandlerString != null) && useFlowHandlerString.equals("true"))
                    useFlowHandler = true;
                if (useFlowHandler) {
                    
                    if (node instanceof Element) {
                        Element element = (Element)node;
                        NodeList children = element.getElementsByTagName(FLOW_HANDLER);
                        Node flowHandlerNode = null;
                        if (children.getLength() >= 1) {
                            flowHandlerNode = children.item(0);
                        }
                        if (children.getLength() > 1) {
                            Debug.println("Non fatal error: There can be only one <"
                                    + FLOW_HANDLER + "> definition in a <" +
                                    URL_MAPPING + ">");
                        }
                        // get the flow handler details
                        if (flowHandlerNode != null) {
                            if (flowHandlerNode instanceof Element) {
                                Element flowElement = (Element)flowHandlerNode;
                                flowHandler = flowElement.getAttribute(FLOW_HANDLER_CLASS);
                                NodeList results = flowElement.getElementsByTagName(HANDLER_RESULT);
                                if (results.getLength() > 0) {
                                    resultMappings = new HashMap();
                                }
                                for (int resultLoop = 0; resultLoop < results.getLength(); resultLoop++) {
                                    Node resultNode = results.item(resultLoop);
                                    if (resultNode instanceof Element) {
                                        Element resultElement = (Element)resultNode;
                                        String key = resultElement.getAttribute(RESULT);
                                        String value = resultElement.getAttribute(NEXT_SCREEN);
                                        if (!resultMappings.containsKey(key)) {
                                            resultMappings.put(key, value);
                                        }
                                        else {
                                            Debug.println("*** Non Fatal errror: Screen "
                                                    + url + " <" + FLOW_HANDLER
                                                    + "> key " + "\"" + key
                                                    + "\" defined more than one time");
                                        }
                                    }
                                }               
                            }
                        }       
                    }
                }              
                URLMapping mapping = new URLMapping(url, screen, useRequestHandler,
                        useFlowHandler, requestHandler, flowHandler, resultMappings,
                        requiresSignin);
                if (!urlMappings.containsKey(url)) {
                    urlMappings.put(url, mapping);
                }
                else {
                    Debug.println("*** Non Fatal errror: Screen " + url + " defined more than once in screen definitions file");
                }
            }
        }
        return  urlMappings;
    }    /**
     * 获取结点subTagName的值，注意文本(#text)也是一个结点(node)
     * put your documentation comment here
     * @param node
     * @param subTagName
     * @return
     */
    public static String getSubTagValue (Node node, String subTagName) {
        String returnString = "";
        if (node != null) {
            NodeList children = node.getChildNodes();
            for (int innerLoop = 0; innerLoop < children.getLength(); innerLoop++) {
                Node child = children.item(innerLoop);
                if ((child != null) && (child.getNodeName() != null) && child.getNodeName().equals(subTagName)) {
                    Node grandChild = child.getFirstChild();//获取文本结点
                    if (grandChild.getNodeValue() != null)
                        return  grandChild.getNodeValue();
                }
            }                   
        }
        return  returnString;
    }

解决方案 »

  1.   

    /**
         * 获取具体视图
         * put your documentation comment here
         * @param root
         * @return
         */
        public static HashMap getScreens (Element root) {
            HashMap screens = new HashMap();
            // get the template
            String templateName = getTagValue(root, TEMPLATE);
            screens.put(TEMPLATE, templateName);
            // get screens
            NodeList list = root.getElementsByTagName(SCREEN);
            for (int loop = 0; loop < list.getLength(); loop++) {
                Node node = list.item(loop);
                if (node != null) {
                    String screenName = getSubTagValue(node, SCREEN_NAME);
                    HashMap parameters = getParameters(node);
                    Screen screen = new Screen(screenName, parameters);
                    if (!screens.containsKey(screenName)) {
                        screens.put(screenName, screen);
                    }
                    else {
                        Debug.println("*** Non Fatal errror: Screen " + screenName
                                + " defined more than once in screen definitions file");
                    }
                }
            }
            return  screens;
        }    /**
         * 获取具体视图的参数
         * put your documentation comment here
         * @param node
         * @return
         */
        private static HashMap getParameters (Node node) {
            HashMap params = new HashMap();
            if (node != null) {
                NodeList children = node.getChildNodes();
                for (int innerLoop = 0; innerLoop < children.getLength(); innerLoop++) {
                    Node child = children.item(innerLoop);
                    if ((child != null) && (child.getNodeName() != null) && child.getNodeName().equals(PARAMETER)) {
                        if (child instanceof Element) {
                            Element childElement = ((Element)child);
                            String key = childElement.getAttribute(KEY);
                            String value = childElement.getAttribute(VALUE);
                            String directString = childElement.getAttribute(DIRECT);
                            boolean direct = false;
                            if ((directString != null) && directString.equals("true")) {
                                direct = true;
                            }
                            if (!params.containsKey(key)) {
                                params.put(key, new Parameter(key, value, direct));
                            }
                            else {
                                Debug.println("*** Non Fatal errror: " + "Parameter "
                                        + key + " is defined more than once");
                            }
                        }
                    }
                }                   
            }
            return  params;
        }
        /**
         * put your documentation comment here
         * @param root
         * @param tagName
         * @return
         */
        public static String getTagValue (Element root, String tagName) {
            String returnString = "";
            NodeList list = root.getElementsByTagName(tagName);
            for (int loop = 0; loop < list.getLength(); loop++) {
                Node node = list.item(loop);
                if (node != null) {
                    Node child = node.getFirstChild();
                    if ((child != null) && child.getNodeValue() != null)
                        return  child.getNodeValue();
                }
            }
            return  returnString;
        }
    }
      

  2.   


    编译的错误：     D:\tomcat\webapps\excel\WEB-INF\classes\mvc>javac xmlparser.java
    xmlparser.java:78: cannot resolve symbol
    symbol  : class ScreenFlowData
    location: class mvc.XmlParser
        public static ScreenFlowData loadScreenFlowData (String location) {
                      ^
    xmlparser.java:58: cannot resolve symbol
    symbol  : variable Debug
    location: class mvc.XmlParser
                Debug.println("XmlParser ** Parsing error" + ", line " +
                ^
    xmlparser.java:60: cannot resolve symbol
    symbol  : variable Debug
    location: class mvc.XmlParser
                Debug.println("XmlParser error: " + err.getMessage());
                ^
    xmlparser.java:62: cannot resolve symbol
    symbol  : variable Debug
    location: class mvc.XmlParser
                Debug.println("XmlParser error: " + e);
                ^
    xmlparser.java:64: cannot resolve symbol
    symbol  : variable Debug
    location: class mvc.XmlParser
                Debug.println("XmlParser error: " + mfx);
                ^
    xmlparser.java:66: cannot resolve symbol
    symbol  : variable Debug
    location: class mvc.XmlParser
                Debug.println("XmlParser error: " + e);
                ^
    xmlparser.java:68: cannot resolve symbol
    symbol  : variable Debug
    location: class mvc.XmlParser
                Debug.println("XmlParser error: " + pce);
                ^
    xmlparser.java:83: cannot resolve symbol
    symbol  : class ScreenFlowData
    location: class mvc.XmlParser
            return  new ScreenFlowData(screenDefinitionMappings, defaultScreen,
                        ^
    xmlparser.java:149: cannot resolve symbol
    symbol  : variable LANGUAGE
    location: class mvc.XmlParser
                        language = ((Element)node).getAttribute(LANGUAGE);
                                                                ^
    xmlparser.java:156: cannot resolve symbol
    symbol  : variable Debug
    location: class mvc.XmlParser
                        Debug.println("*** Non Fatal errror: ScreenDefinitions for l
    anguage "
                        ^
    xmlparser.java:182: cannot resolve symbol
    symbol  : class Screen
    location: class mvc.XmlParser
                    Screen screen = new Screen(screenName, parameters);
                    ^
    xmlparser.java:182: cannot resolve symbol
    symbol  : class Screen
    location: class mvc.XmlParser
                    Screen screen = new Screen(screenName, parameters);
                                        ^
    xmlparser.java:187: cannot resolve symbol
    symbol  : variable Debug
    location: class mvc.XmlParser
                        Debug.println("*** Non Fatal errror: Screen " + screenName
                        ^
    xmlparser.java:218: cannot resolve symbol
    symbol  : class Parameter
    location: class mvc.XmlParser
                                params.put(key, new Parameter(key, value, direct));
                                                    ^
    xmlparser.java:221: cannot resolve symbol
    symbol  : variable Debug
    location: class mvc.XmlParser
                                Debug.println("*** Non Fatal errror: " + "Parameter
    "
                                ^
    xmlparser.java:287: cannot resolve symbol
    symbol  : variable Debug
    location: class mvc.XmlParser
                                Debug.println("Non fatal error: There can be only on
    e <"
                                ^
    xmlparser.java:310: cannot resolve symbol
    symbol  : variable Debug
    location: class mvc.XmlParser
                                                Debug.println("*** Non Fatal errror:
     Screen "
                                                ^
    xmlparser.java:321: cannot resolve symbol
    symbol  : class URLMapping
    location: class mvc.XmlParser
                    URLMapping mapping = new URLMapping(url, screen, useRequestHandl
    er,
                    ^
    xmlparser.java:321: cannot resolve symbol
    symbol  : class URLMapping
    location: class mvc.XmlParser
                    URLMapping mapping = new URLMapping(url, screen, useRequestHandl
    er,
                                             ^
    xmlparser.java:328: cannot resolve symbol
    symbol  : variable Debug
    location: class mvc.XmlParser
                        Debug.println("*** Non Fatal errror: Screen " + url + " defi
    ned more than once in screen definitions file");
                        ^
    20 errors能详细解释一下吗？
      

  3.   

    URLMapping,Debug,Parameter,ScreenFlowData类没有。你不会只有这一个类文件吧？另外，变量也没有定义。在别的文件吧。
      

  4.   

    大多数都是找不到类和没有定义变量的错误
    变量的话，自己查一下程序，有没有写错
    类的话，看一下是不是有些类没有import