[JAVA]Java下XML的解析

目前我知道的JAVA解析XML的方式有：DOM, SAX, StAX；如果选用这几种，感觉还是有点麻烦；如果使用：JAXB(Java Architecture for XML Binding)，个人觉得太方便了！

先简单说下前三种方式：

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：

 1 import java.util.ArrayList;

 2 import java.util.List;

 3 

 4 import org.xml.sax.Attributes;

 5 import org.xml.sax.SAXException;

 6 import org.xml.sax.helpers.DefaultHandler;

 7 

 8 public class ConfigParser extends DefaultHandler {

 9     private String currentConfigSection;

10 

11     public SysConfigItem sysConfig;

12     public List<InterfaceConfigItem> interfaceConfigList;

13     public List<FtpConfigItem> ftpConfigList;

14     public List<AdapterConfigItem> adapterConfigList;

15 

16     public void startDocument() throws SAXException {

17         sysConfig = new SysConfigItem();

18         interfaceConfigList = new ArrayList<InterfaceConfigItem>();

19         ftpConfigList = new ArrayList<FtpConfigItem>();

20         adapterConfigList = new ArrayList<AdapterConfigItem>();

21     }

22 

23     public void endDocument() throws SAXException {

24 

25     }

26 

27     public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {

28         if (qName.equalsIgnoreCase("Item") && attributes.getLength() > 0) {

29             if (currentConfigSection.equalsIgnoreCase("SysConfigItem")) {

30                 sysConfig = new SysConfigItem(attributes);

31             } else if (currentConfigSection.equalsIgnoreCase("InterfaceConfigItems")) {

32                 interfaceConfigList.add(new InterfaceConfigItem(attributes));

33             } else if (currentConfigSection.equalsIgnoreCase("FtpConfigItems")) {

34                 ftpConfigList.add(new FtpConfigItem(attributes));

35             } else if (currentConfigSection.equalsIgnoreCase("AdapterConfigItems")) {

36                 adapterConfigList.add(new AdapterConfigItem(attributes));

37             }

38         } else {

39             currentConfigSection = qName;

40         }

41     }

42 

43     public void endElement(String uri, String localName, String qName) throws SAXException {

44 

45     }

46 

47     public void characters(char ch[], int start, int length) throws SAXException {

48 

49     }

50 }

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() {



    }



    /**

     * 目前只支持几种常用类型 如果需要支持其他类型，请修改这里的代码

     * 

     * @param attributes

     */

    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;

    }



    /**

     * 处理时间类型属性（时间格式要求为：yyyy-MM-dd hh:mm:ss）

     * 

     * @param dateString

     * @return

     */

    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）：

<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>

<InterBOSS>

    <Version>0100</Version>

    <TestFlag>0</TestFlag>

    <BIPType>

        <BIPCode>BIP2B518</BIPCode>

        <ActivityCode>T2101518</ActivityCode>

        <ActionCode>0</ActionCode>

    </BIPType>

    <RoutingInfo>

        <OrigDomain>BOSS</OrigDomain>

        <RouteType>routeType</RouteType>

        <Routing>

            <HomeDomain>XXXX</HomeDomain>

            <RouteValue>routeValue</RouteValue>

        </Routing>

    </RoutingInfo>

    <TransInfo>

        <SessionID>2013041017222313925676</SessionID>

        <TransIDO>2013041017222313925676</TransIDO>

        <TransIDOTime>20130410172223</TransIDOTime>

        <TransIDH></TransIDH>

        <TransIDHTime></TransIDHTime>

    </TransInfo>

    <SNReserve>

        <TransIDC></TransIDC>

        <ConvID></ConvID>

        <CutOffDay></CutOffDay>

        <OSNTime></OSNTime>

        <OSNDUNS></OSNDUNS>

        <HSNDUNS></HSNDUNS>

        <MsgSender></MsgSender>

        <MsgReceiver></MsgReceiver>

        <Priority></Priority>

        <ServiceLevel></ServiceLevel>

        <SvcContType></SvcContType>

    </SNReserve>

    <Response>

        <RspType>rspType</RspType>

        <RspCode>rspCode</RspCode>

        <RspDesc>rspDesc</RspDesc>

    </Response>

    <SvcCont><![CDATA[<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

<batchSyncOrderRelationReq>

    <msgTransactionID>210001BIP2B518130410172223651627</msgTransactionID>

    <reqNum>2</reqNum>

    <reqBody>

        <oprNumb>210001BIP2B518130410172224341871</oprNumb>

        <subscriptionInfo>

            <oprTime>oprTime1</oprTime>

            <actionID>actionId1</actionID>

            <brand>brand1</brand>

            <effTime>effTime1</effTime>

            <expireTime>expireTime1</expireTime>

            <feeUser_ID>feeUserId1</feeUser_ID>

            <destUser_ID>destUserId1</destUser_ID>

            <actionReasonID>actionId1</actionReasonID>

            <servType>servType1</servType>

            <subServType>subServType1</subServType>

            <SPID>spId1</SPID>

            <SPServID>spServId1</SPServID>

            <accessMode>accessMode1</accessMode>

            <servParamInfo>

                <para_num>0</para_num>

                <para_info>

                    <para_name></para_name>

                    <para_value></para_value>

                </para_info>

            </servParamInfo>

            <feeType>feeType1</feeType>

        </subscriptionInfo>

    </reqBody>

    <reqBody>

        <oprNumb>210001BIP2B518130410172224420909</oprNumb>

        <subscriptionInfo>

            <oprTime>oprTime2</oprTime>

            <actionID>actionId2</actionID>

            <brand>brand2</brand>

            <effTime>effTime2</effTime>

            <expireTime>expireTime2</expireTime>

            <feeUser_ID>feeUserId2</feeUser_ID>

            <destUser_ID>destUserId2</destUser_ID>

            <actionReasonID>actionId2</actionReasonID>

            <servType>servType2</servType>

            <subServType>subServType2</subServType>

            <SPID>spId2</SPID>

            <SPServID>spServId2</SPServID>

            <accessMode>accessMode2</accessMode>

            <servParamInfo>

                <para_num>0</para_num>

                <para_info>

                    <para_name></para_name>

                    <para_value></para_value>

                </para_info>

            </servParamInfo>

            <feeType>feeType2</feeType>

        </subscriptionInfo>

    </reqBody>

</batchSyncOrderRelationReq>]]></SvcCont>

</InterBOSS>

解码代码如下：

  1 @XmlRootElement(name = "batchSyncOrderRelationReq")

  2 @XmlAccessorType(XmlAccessType.FIELD)

  3 public class BatchSyncOrderRelationReq extends BossMessage<BatchSyncOrderRelationReq> {

  4 

  5     @XmlElement(name = "msgTransactionID")

  6     private String msgTransactionId = "";

  7 

  8     @XmlElement(name = "reqNum")

  9     private String reqNum = "";

 10 

 11     @XmlElement(name = "reqBody")

 12     private List<BatchSyncOrderRelationReqBody> reqBodyList;

 13 

 14     public BatchSyncOrderRelationReq() {

 15 

 16     }

 17 

 18     public String getMsgTransactionId() {

 19         return this.msgTransactionId;

 20     }

 21 

 22     public void setMsgTransactionId(String msgTransactionId) {

 23         this.msgTransactionId = msgTransactionId;

 24     }

 25 

 26     public String getReqNum() {

 27         return this.reqNum;

 28     }

 29 

 30     public void setReqNum(String reqNum) {

 31         this.reqNum = reqNum;

 32     }

 33 

 34     public List<BatchSyncOrderRelationReqBody> getReqBodyList() {

 35         return this.reqBodyList;

 36     }

 37 

 38     public void setReqBodyList(List<BatchSyncOrderRelationReqBody> reqBodyList) {

 39         this.reqBodyList = reqBodyList;

 40     }

 41  

131     @Override

132     public BatchSyncOrderRelationReq Deserialized(String interBossXmlContent) throws BusinessException {

133         try {

134             // deserialized for head

135             JAXBContext jaxbCxt4Head = JAXBContext.newInstance(MessageHead.class);

136             Unmarshaller unmarshaller4Head = jaxbCxt4Head.createUnmarshaller();

137             MessageHead head = (MessageHead) unmarshaller4Head.unmarshal(new StringReader(interBossXmlContent));

138 

139             // deserialized for SyncOrderRelationReq body

140             JAXBContext jaxbCxt4Body = JAXBContext.newInstance(BatchSyncOrderRelationReq.class);

141             Unmarshaller unmarshaller4Body = jaxbCxt4Body.createUnmarshaller();

142             BatchSyncOrderRelationReq batchSyncOrderRelationReq = (BatchSyncOrderRelationReq) unmarshaller4Body.unmarshal(new StringReader(head.getSvcCont().trim()));

143             batchSyncOrderRelationReq.setHead(head);

144 

145             return batchSyncOrderRelationReq;

146         } catch (JAXBException e) {

147             throw new BusinessException("SyncOrderRelationReq.Deserialized() Error!(" + interBossXmlContent + ")", e);

148         }

149     }

150 

151 }

@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;

    }

}