DOM方式：个人理解类似.net的Xmldocument，解析的时候效率不高，占用内存，不适合大XML的解析；
SAX方式：基于事件的解析，当解析到xml的某个部分的时候，会触发特定事件，可以在自定义的解析类中定义当事件触发时要做得事情；个人感觉一种很另类的方式，不知道.Net体系下是否有没有类似的方式？
StAX方式：个人理解类似.net的XmlReader方式，效率高，占用内存少，适用大XML的解析；
不过SAX方式之前也用过，本文主要介绍JAXB，这里只贴下主要代码：
import java.util.ArrayList; import java.util.List; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; public class ConfigParser extends DefaultHandler { private String currentConfigSection; public SysConfigItem sysConfig; public List interfaceConfigList; public List ftpConfigList; public List adapterConfigList; public void startdocument() throws SAXException { sysConfig = new SysConfigItem(); interfaceConfigList = new ArrayList(); ftpConfigList = new ArrayList(); adapterConfigList = new ArrayList(); } public void enddocument() throws SAXException { } public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { if (qName.equalsIgnoreCase("Item") && attributes.getLength() > 0) { if (currentConfigSection.equalsIgnoreCase("SysConfigItem")) { sysConfig = new SysConfigItem(attributes); } else if (currentConfigSection.equalsIgnoreCase("InterfaceConfigItems")) { interfaceConfigList.add(new InterfaceConfigItem(attributes)); } else if (currentConfigSection.equalsIgnoreCase("FtpConfigItems")) { ftpConfigList.add(new FtpConfigItem(attributes)); } else if (currentConfigSection.equalsIgnoreCase("AdapterConfigItems")) { adapterConfigList.add(new AdapterConfigItem(attributes)); } } else { currentConfigSection = qName; } } public void endElement(String uri, String localName, String qName) throws SAXException { } public void characters(char ch[], int start, int length) throws SAXException { } } import java.lang.reflect.Field;import java.text.DateFormat;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;import org.xml.sax.Attributes;public class ConfigItembase { private static DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); public ConfigItembase() { } public ConfigItembase(Attributes attributes) { Class cls = this.getClass(); Field[] fields = cls.getDeclaredFields(); for (Field field : fields) { String fieldType = field.getType().getSimpleName(); for (int i = 0; i < attributes.getLength(); i++) { if (attributes.getQName(i).equalsIgnoreCase(field.getName())) { field.setAccessible(true); try { if (fieldType.equalsIgnoreCase("String")) { field.set(this, attributes.getValue(attributes.getQName(i))); } else if (fieldType.equalsIgnoreCase("Integer")) { field.set(this, Integer.valueOf(attributes.getValue(attributes.getQName(i)))); } else if (fieldType.equalsIgnoreCase("Double")) { field.set(this, Double.valueOf(attributes.getValue(attributes.getQName(i)))); } else if (fieldType.equalsIgnoreCase("Date")) { field.set(this, GetDate(attributes.getValue(attributes.getQName(i)))); } else { System.out.println("Warning:Unhandler Field(" + field.getName() + "-" + fieldType + ")"); } } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } break; } } } } public String toString() { String result = ""; Class cls = this.getClass(); String classNameString = cls.getName(); result += classNameString.substring(classNameString.lastIndexOf('.') + 1, classNameString.length()) + ":"; Field[] fields = cls.getDeclaredFields(); for (Field field : fields) { try { result += field.getName() + "=" + field.get(this) + ";"; } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } } return result; } private static Date GetDate(String dateString) { Date date = null; try { date = dateFormat.parse(dateString); } catch (ParseException e) { e.printStackTrace(); } return date; }}下面重点介绍一下最方便的:JAXB(Java Architecture for XML Binding)
这里用比较复杂的移动BatchSyncOrderRelationReq接口XML做为示例（感觉能解这个大家基本上够用了），报文格式如下（SvcCont里的CDATA内容是报文体，太恶心了）：
0100 0 BIP2B518 T2101518 0 BOSS routeType XXXX routevalue 2013041017222313925676 2013041017222313925676 20130410172223 rspType rspCode rspDesc ]]> 210001BIP2B518130410172223651627 2 210001BIP2B518130410172224341871 oprTime1 actionId1 brand1 effTime1 expireTime1 feeUserId1 destUserId1 actionId1 servType1 subServType1 spId1 spServId1 accessMode1 0 feeType1 210001BIP2B518130410172224420909 oprTime2 actionId2 brand2 effTime2 expireTime2 feeUserId2 destUserId2 actionId2 servType2 subServType2 spId2 spServId2 accessMode2 0 feeType2
解码代码如下：
@XmlRootElement(name = "batchSyncOrderRelationReq") @XmlAccessorType(XmlAccessType.FIELD) public class BatchSyncOrderRelationReq extends BossMessage{ @XmlElement(name = "msgTransactionID") private String msgTransactionId = ""; @XmlElement(name = "reqNum") private String reqNum = ""; @XmlElement(name = "reqBody") private List reqBodyList; public BatchSyncOrderRelationReq() { } public String getMsgTransactionId() { return this.msgTransactionId; } public void setMsgTransactionId(String msgTransactionId) { this.msgTransactionId = msgTransactionId; } public String getReqNum() { return this.reqNum; } public void setReqNum(String reqNum) { this.reqNum = reqNum; } public List getReqBodyList() { return this.reqBodyList; } public void setReqBodyList(List reqBodyList) { this.reqBodyList = reqBodyList; } @Override public BatchSyncOrderRelationReq Deserialized(String interBossXmlContent) throws BusinessException { try { // deserialized for head JAXBContext jaxbCxt4Head = JAXBContext.newInstance(MessageHead.class); Unmarshaller unmarshaller4Head = jaxbCxt4Head.createUnmarshaller(); MessageHead head = (MessageHead) unmarshaller4Head.unmarshal(new StringReader(interBossXmlContent)); // deserialized for SyncOrderRelationReq body JAXBContext jaxbCxt4Body = JAXBContext.newInstance(BatchSyncOrderRelationReq.class); Unmarshaller unmarshaller4Body = jaxbCxt4Body.createUnmarshaller(); BatchSyncOrderRelationReq batchSyncOrderRelationReq = (BatchSyncOrderRelationReq) unmarshaller4Body.unmarshal(new StringReader(head.getSvcCont().trim())); batchSyncOrderRelationReq.setHead(head); return batchSyncOrderRelationReq; } catch (JAXBException e) { throw new BusinessException("SyncOrderRelationReq.Deserialized() Error!(" + interBossXmlContent + ")", e); } } }
@XmlAccessorType(XmlAccessType.FIELD)public class BatchSyncOrderRelationReqBody { @XmlElement(name = "oprNumb") private String oprNumb = ""; @XmlElement(name = "subscriptionInfo") private SubscriptionInfo subscriptionInfo; public BatchSyncOrderRelationReqBody(){ } public BatchSyncOrderRelationReqBody(String oprNumb, SubscriptionInfo subscriptionInfo) { this.oprNumb = oprNumb; this.subscriptionInfo = subscriptionInfo; } public String getOprNumb() { return this.oprNumb; } public void setOprNumb(String oprNumb) { this.oprNumb = oprNumb; } public SubscriptionInfo getSubscriptionInfo() { return this.subscriptionInfo; } public void setSubscriptionInfo(SubscriptionInfo subscriptionInfo) { this.subscriptionInfo = subscriptionInfo; }}@XmlAccessorType(XmlAccessType.FIELD)public class SubscriptionInfo { @XmlElement(name = "oprTime") private String oprTime = ""; @XmlElement(name = "actionID") private String actionId = ""; @XmlElement(name = "brand") private String brand = ""; @XmlElement(name = "effTime") private String effTime = ""; @XmlElement(name = "expireTime") private String expireTime = ""; @XmlElement(name = "feeUser_ID") private String feeUserId = ""; @XmlElement(name = "destUser_ID") private String destUserId = ""; @XmlElement(name = "actionReasonID") private String actionReasonId = ""; @XmlElement(name = "servType") private String servType = ""; @XmlElement(name = "subServType") private String subServType = ""; @XmlElement(name = "SPID") private String spId = ""; @XmlElement(name = "SPServID") private String spServId = ""; @XmlElement(name = "accessMode") private String accessMode = ""; @XmlElement(name = "feeType") private String feeType = ""; public SubscriptionInfo() { } public SubscriptionInfo( String oprTime, String actionId, String brand, String effTime, String expireTime, String feeUserId, String destUserId, String actionReasonId, String servType, String subServType, String spId, String spServId, String accessMode, String feeType) { this.oprTime = oprTime; this.actionId = actionId; this.brand = brand; this.effTime = effTime; this.expireTime = expireTime; this.feeUserId = feeUserId; this.destUserId = destUserId; this.actionReasonId = actionReasonId; this.servType = servType; this.subServType = subServType; this.spId = spId; this.spServId = spServId; this.accessMode = accessMode; this.feeType = feeType; } public String getOprTime() { return this.oprTime; } public void setOprTime(String oprTime) { this.oprTime = oprTime; } public String getActionId() { return this.actionId; } public void setActionId(String actionId) { this.actionId = actionId; } public String getBrand() { return this.brand; } public void setBrand(String brand) { this.brand = brand; } public String getEffTime() { return this.effTime; } public void setEffTime(String effTime) { this.effTime = effTime; } public String getExpireTime() { return this.expireTime; } public void setExpireTime(String expireTime) { this.expireTime = expireTime; } public String getFeeUserId() { return this.feeUserId; } public void setFeeUserId(String feeUserId) { this.feeUserId = feeUserId; } public String getDestUserId() { return this.destUserId; } public void setDestUserId(String destUserId) { this.destUserId = destUserId; } public String getActionReasonId() { return this.actionReasonId; } public void setActionReasonId(String actionReasonId) { this.actionReasonId = actionReasonId; } public String getServType() { return this.servType; } public void setServType(String servType) { this.servType = servType; } public String getSubServType() { return this.subServType; } public void setSubServType(String subServType) { this.subServType = subServType; } public String getSpId() { return this.spId; } public void setSpId(String spId) { this.spId = spId; } public String getSpServId() { return this.spServId; } public void setSpServId(String spServId) { this.spServId = spServId; } public String getAccessMode() { return this.accessMode; } public void setAccessMode(String accessMode) { this.accessMode = accessMode; } public String getFeeType() { return this.feeType; } public void setFeeType(String feeType) { this.feeType = feeType; }}更多Java中对XML的解析详解相关文章请关注PHP中文网！
