【fastweixin框架教程2】weblogic javax.xml 解析xml问题

来源：互联网发布：翼华科技知乎编辑：程序博客网时间：2024/05/21 10:42
一般国内的攻城狮喜欢用tomcat进行调试自己的程序，但往往发布到生产环境就会出现各种各样问题。
比如上一篇文章我们谈了fastweixin最基本的使用，也许你在tomcat里面使用没有任何问题，但发布到weblogic上就会出现各种各样问题：
ExceptionPrecondition for readText is nextEvent().getTypeEventType() ==START_ELEMENT
查看fastweixin原始代码
可以看到其使用Javax里面xml解析器而在Weblogic中，默认使用weblogic自己实现javax类，用这个处理xml 会出问题。
大家需要注意的是，javax开头的类，一般第三方容器很多都有自己实现，相同API的Class，默认一般都是自己实现Class，而不是使用JDK里面的。
我个人解决方法就是使用第三方jar，比如xmlpull替代。
下面是修改后的代码：
package com.fastwixinextend;import com.github.sd4324530.fastweixin.util.CollectionUtil;import com.github.sd4324530.fastweixin.util.StrUtil;import com.github.sd4324530.fastweixin.util.StreamUtil;import com.qq.weixin.mp.aes.AesException;import com.qq.weixin.mp.aes.WXBizMsgCrypt;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.StringReader;import java.util.HashMap;import java.util.List;import java.util.Map;import javax.servlet.http.HttpServletRequest;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.parsers.ParserConfigurationException;import javax.xml.stream.XMLStreamException;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.w3c.dom.Document;import org.w3c.dom.Element;import org.w3c.dom.NodeList;import org.xml.sax.InputSource;import org.xml.sax.SAXException;import org.xmlpull.v1.XmlPullParser;import org.xmlpull.v1.XmlPullParserException;import org.xmlpull.v1.XmlPullParserFactory;/**luozhuang * ExceptionPrecondition for readText is nextEvent().getTypeEventType() == * START_ELEMENT 原始代码使用Javax里面xml解析器 在Weblogic中，默认使用weblogic自己实现的xml 会出问题 */public class MyMessageUtil {    public MyMessageUtil() {        super();    }    private static final Logger LOG            = LoggerFactory.getLogger(MyMessageUtil.class);    private static final String FORMAT            = "<xml><ToUserName><![CDATA[toUser]]></ToUserName><Encrypt><![CDATA[%1$s]]></Encrypt></xml>";    /**     * 解析从微信服务器来的请求，将消息或者事件返回出去     *     * @param request http请求对象     * @param token 用户设置的taken     * @param appId 公众号的APPID     * @param aesKey 用户设置的加密密钥     * @return 微信消息或者事件Map     */    public static Map<String, Object> parseXml(HttpServletRequest request,            String token, String appId,            String aesKey) {        Map<String, Object> map = new HashMap<String, Object>();        InputStream inputStream = null;        String message = null;        try {            inputStream = request.getInputStream();            if (StrUtil.isNotBlank(aesKey)) {                ByteArrayOutputStream outputStream                        = new ByteArrayOutputStream();                StreamUtil.copy(inputStream, outputStream);                String body = outputStream.toString("UTF-8");                LOG.debug("收到的消息密文:{}", body);                DocumentBuilderFactory dbf                        = DocumentBuilderFactory.newInstance();                DocumentBuilder db = dbf.newDocumentBuilder();                StringReader sr = new StringReader(body);                InputSource is = new InputSource(sr);                Document document = db.parse(is);                Element root = document.getDocumentElement();                NodeList nodelist1 = root.getElementsByTagName("Encrypt");                WXBizMsgCrypt pc = new WXBizMsgCrypt(token, aesKey, appId);                String msgSignature = request.getParameter("msg_signature");                String timeStamp = request.getParameter("timestamp");                String nonce = request.getParameter("nonce");                LOG.debug("msgSignature:{}", msgSignature);                LOG.debug("timeStamp:{}", timeStamp);                LOG.debug("nonce:{}", nonce);                String encrypt = nodelist1.item(0).getTextContent();                String fromXML = String.format(FORMAT, encrypt);                message                        = pc.DecryptMsg(msgSignature, timeStamp, nonce, fromXML);                LOG.debug("收到的消息:{}", message);            }            inputStream = new ByteArrayInputStream(message.getBytes("UTF-8"));            XmlPullParserFactory pullFactory                    = XmlPullParserFactory.newInstance();            XmlPullParser reader = pullFactory.newPullParser();            // 设置输入流 并指明编码方式            reader.setInput(inputStream, "UTF-8");            // 产生第一个事件            int eventType = reader.getEventType();            // 只要不是文档结束事件，就一直循环            while (eventType != XmlPullParser.END_DOCUMENT) {                if (eventType == XmlPullParser.START_TAG) {                    String tagName = reader.getName();                    if ("SendPicsInfo".equals(tagName)) {                        map.put(tagName, eventSendPicsInfo(reader));                    } else if ("SendLocationInfo".equals(tagName)) {                        map.put(tagName, eventSendLocationInfo(reader));                    } else if ("ScanCodeInfo".equals(tagName)) {                        map.put(tagName, eventScanCodePush(reader));                    } else if ("xml".equals(tagName)) {                    } else {                        eventType = reader.next();                        map.put(tagName, reader.getText());                    }                }                eventType = reader.next();            }        } catch (IOException e) {            LOG.error("IO出现异常", e);        } catch (ParserConfigurationException e) {            LOG.error("XML解析出现异常", e);        } catch (SAXException e) {            LOG.error("XML解析出现异常", e);        } catch (AesException e) {            LOG.error("Aes异常", e);        } catch (XmlPullParserException e) {            LOG.error("XML解析出现异常", e);        } finally {            try {                if (inputStream != null) {                    inputStream.close();                }            } catch (IOException e) {            }        }        return map;    }    /**     * Event为pic_sysphoto, pic_photo_or_album, pic_weixin时触发     *     * @param reader reader     * @return 读取结果     * @throws XMLStreamException XML解析异常     */    protected static Map<String, Object> eventSendPicsInfo(XmlPullParser reader) throws XmlPullParserException,            IOException {        Map<String, Object> sendPicsInfoMap = new HashMap<String, Object>();        int eventType = reader.next();        while (eventType != XmlPullParser.END_DOCUMENT) {            eventType = reader.next();            if (eventType == XmlPullParser.START_TAG) {                String tagName = reader.getName();                if ("Count".equals(tagName)) {                    eventType = reader.next();                    sendPicsInfoMap.put(tagName, reader.getText());                } else if ("PicList".equals(tagName)) {                    //                    StringBuilder sb = new StringBuilder();                    List<Map<String, String>> picList                            = CollectionUtil.newArrayList();                    while (eventType != XmlPullParser.END_DOCUMENT) {                        int event1 = reader.next();                        if (event1 == XmlPullParser.START_TAG                                && "PicMd5Sum".equals(reader.getName())) {                            Map<String, String> picMap                                    = new HashMap<String, String>();                            eventType = reader.next();                            picMap.put("PicMd5Sum", reader.getText());                            //                            sb.append(reader.getText()());                            //                            sb.append(",");                            picList.add(picMap);                        } else if (event1 == XmlPullParser.END_TAG                                && "PicList".equals(reader.getName())) {                            break;                        }                    }                    //                    sendPicsInfoMap.put(tagName, sb.substring(0, sb.length()));                    sendPicsInfoMap.put(tagName, picList);                }            }        }        return sendPicsInfoMap;    }    /**     * Event为location_select时触发     *     * @param reader reader     * @return 读取结果     * @throws XMLStreamException XML解析异常     */    protected static Map<String, Object> eventSendLocationInfo(XmlPullParser reader) throws XmlPullParserException,            IOException {        Map<String, Object> sendLocationInfo = new HashMap<String, Object>();        int eventType = reader.next();        while (eventType != XmlPullParser.END_DOCUMENT) {            eventType = reader.next();            if (eventType == XmlPullParser.START_TAG) {                String tagName = reader.getName().toString();                eventType = reader.next();                sendLocationInfo.put(tagName, reader.getText());            }        }        return sendLocationInfo;    }    /**     * Event为scancode_push, scancode_waitmsg时触发     *     * @param reader reader     * @return 读取结果     * @throws XMLStreamException XML解析异常     */    protected static Map<String, Object> eventScanCodePush(XmlPullParser reader) throws XmlPullParserException,            IOException {        Map<String, Object> scanCodePush = new HashMap<String, Object>();        int eventType = reader.next();        while (eventType != XmlPullParser.END_DOCUMENT) {            eventType = reader.next();            if (eventType == XmlPullParser.START_TAG) {                String tagName = reader.getName();                eventType = reader.next();                scanCodePush.put(tagName, reader.getText());            }        }        return scanCodePush;    }}
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