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  • JAXB和XStream比较

    转自:https://www.cnblogs.com/tang9139/p/4825610.html

              http://www.cnblogs.com/wlsblog/p/7452882.html

    这两东东本质上是有差别的,JAXB称为OX binding工具,XStream应该算序列化工具,但OX binding工具也会marshall和unmarshall,所以包含了序列化这一部分。序列化工具不一定需要提供binding的功能。既然都玩序列化,那就简单地比较一下它们两在序列化方面的强弱吧。

    JAXB:Toplink JAXB 10133,应该是JAXB 1.1标准 (取消了schema的validation功能)

    XStream:1.3.1

    数据长度:

    类型

    长度

    内容

    XStraem

    351

    <com.oocl.frm.ws.sample.Employee>

     <name>Liufei</name>

     <age>40</age>

     <address>

        <street>Zhaojiabang</street>

        <country>China</country>

        <city>Shanghai</city>

        <doorNum>789</doorNum>

        <empName>Afka liu</empName>

     </address>

     <salary>20000.0</salary>

     <isActive>false</isActive>

     <sexy>F</sexy>

    </com.oocl.frm.ws.sample.Employee>

    Toplink JAXB

    589(已经去掉了white space)

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

    <ns0:employee xsi:schemaLocation="http://www.oocl.com/frm/ws/jaxb" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:ns0="http://www.oocl.com/frm/ws/jaxb" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><ns0:name>Liufei</ns0:name><ns0:age>40</ns0:age><ns0:salary>20000.0</ns0:salary><ns0:sexy>F</ns0:sexy><ns0:isActive>false</ns0:isActive><ns0:address><ns0:street>Zhaojiabang</ns0:street><ns0:country>China</ns0:country><ns0:city>Shanghai</ns0:city><ns0:doorNum>789</ns0:doorNum><ns0:empName>Afka liu</ns0:empName></ns0:address></ns0:employee>

    时间:序列化和反序列化1000000次。

    类型

    序列化(ms)

    反序列化(ms)

    XStraem

    90148

    135878

    Toplink JAXB

    34872

    56557

    结果对比:数据量XStream占优势,时间性能上Toplink Jaxb占明显优势

    总结(只从序列化功能角度看)

    JAXB: 优点

    • J2EE标准
    • 运行时间比XStream少

    缺点

    • 用起来不方便:需要把手动的把business object转换成schema object,当然也可以直接将schema object作为business object,或者采用反射的方法。
    • 有一定的局限性:需要schema或者annotation
    • 数据量稍大

    XStream优点:

    • 用起来方便
    • 不需要schema,拿过来就转
    • 数据量稍小

    缺点:

    • 非标准
    • 时间性能差
    • ------------------------------
    • Java Architecture for XML Binding (JAXB) 是一个业界的标准,是一项可以根据XML Schema产生Java类的技术。该过程中,JAXB也提供了将XML实例文档反向生成Java对象树的方法,并能将Java对象树的内容重新写到XML实例文档。从另一方面来讲,JAXB提供了快速而简便的方法将XML模式绑定到Java表示,从而使得Java开发者在Java应用程序中能方便地结合XML数据和处理函数。

      这意味着你不需要处理甚至不需要知道XML编程技巧就能在Java应用程序中利用平台核心XML数据的灵活性。而且,可以充分利用XML的优势而不用依赖于复杂的XML处理模型如SAX或DOM。JAXB 隐藏了细节并且取消了SAX和DOM中没用的关系——生成的JAXB类仅描述原始模型中定义的关系。其结果是结合了高度可移植Java代码和高度可移植的XML数据。其中这些代码可用来创建灵活、轻便的应用程序和Web服务。     JAXB(java Architecture for XML Binding) 是一个业界的标准,是一项可以根据XML Schema产生Java类的技术。该过程中,JAXB也提供了将XML实例文档反向生成Java对象树的方法,并能将Java对象树的内容重新写到 XML实例文档。  Jaxb 2.0是JDK 1.6的组成部分。我们不需要下载第三方jar包 即可做到轻松转换。Jaxb2使用了JDK的新特性,如:Annotation、GenericType等,需要在即将转换的JavaBean中添加annotation注解。

      一、重要概念

      • JAXBContext类,是应用的入口,用于管理XML/Java绑定信息。
      • Marshaller接口,将Java对象序列化为XML数据。
      • Unmarshaller接口,将XML数据反序列化为Java对象。
      • @XmlType,将Java类或枚举类型映射到XML模式类型
      • @XmlAccessorType(XmlAccessType.FIELD) ,控制字段或属性的序列化。FIELD表示JAXB将自动绑定Java类中的每个非静态的(static)、非瞬态的(由@XmlTransient标 注)字段到XML。其他值还有XmlAccessType.PROPERTY和XmlAccessType.NONE。
      • @XmlAccessorOrder,控制JAXB 绑定类中属性和字段的排序。
      • @XmlJavaTypeAdapter,使用定制的适配器(即扩展抽象类XmlAdapter并覆盖marshal()和unmarshal()方法),以序列化Java类为XML。
      • @XmlElementWrapper ,对于数组或集合(即包含多个元素的成员变量),生成一个包装该数组或集合的XML元素(称为包装器)。
      • @XmlRootElement,将Java类或枚举类型映射到XML元素。
      • @XmlElement,将Java类的一个属性映射到与属性同名的一个XML元素。
      • @XmlAttribute,将Java类的一个属性映射到与属性同名的一个XML属性。

      二、工具类

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      package com.ehaoyao.jobcenter.order.webservices.jztdzy.Util;
       
      import org.apache.poi.ss.formula.functions.T;
       
      import javax.xml.bind.*;
      import javax.xml.namespace.QName;
      import java.io.Reader;
      import java.io.StringReader;
      import java.io.StringWriter;
       
      public class JAXBUtil {
       
          /**
           * beanToXml
           * @param obj
           * @param encoding
           * @return
           */
          public static String toXml(Object obj,String encoding) {
              try {
                  StringWriter sw = new StringWriter();
                  JAXBContext context = JAXBCache.instance().getJAXBContext(obj.getClass());
                  Marshaller marshaller = context.createMarshaller();
                  marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
                  marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);// 是否省略xm头声明信息
                  marshaller.setProperty(Marshaller.JAXB_ENCODING, encoding);
                  marshaller.marshal(obj, sw);
                  return sw.toString().replace("ns2:","").replace(":ns2","");
              catch(JAXBException e) {
                  e.printStackTrace();
                  return e.getMessage();
              }
          }
       
       
          /**
           * xmlToBean
           * @param xml
           * @param c
           * @param <T>
           * @return
           */
          @SuppressWarnings("unchecked")
          public static <T> T toBean(String xml, Class<T> c,String encoding) {
              T t = null;
              try {
                  JAXBContext context = JAXBContext.newInstance(c);
                  Unmarshaller unmarshaller = context.createUnmarshaller();
                  t = (T) unmarshaller.unmarshal(new StringReader(xml));
              catch (Exception e) {
                  e.printStackTrace();
              }
              return t;
          }
      }

        

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      package com.ehaoyao.jobcenter.order.webservices.jztdzy.Util;
       
      import java.util.concurrent.ConcurrentHashMap;
      import java.util.concurrent.ConcurrentMap;
      import javax.xml.bind.JAXBContext;
      import javax.xml.bind.JAXBException;
      public final class JAXBCache {
          private static final JAXBCache instance = new JAXBCache();
          private final ConcurrentMap<String, JAXBContext> contextCache = new ConcurrentHashMap<String, JAXBContext>();
          private JAXBCache() {
          }
          public static JAXBCache instance() {
              return instance;
          }
          JAXBContext getJAXBContext(Class<?> clazz) throws JAXBException {
              JAXBContext context = contextCache.get(clazz.getName());
              if ( context == null )
              {
                  context = JAXBContext.newInstance(clazz);
                  contextCache.putIfAbsent(clazz.getName(), context);
              }
              return context;
          }
      }

        

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      package com.ehaoyao.jobcenter.order.webservices.jztdzy.Util;
       
      public class XMLNameSpace {
          public static final String ADMIN_PREFIX = "";
          public static final String ADMIN_URI = "http://WebServices.WS.JointownTech.com//";
      }

        

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      package com.ehaoyao.jobcenter.order.webservices.jztdzy.Util;
       
      import com.ehaoyao.jobcenter.order.webservices.jztdzy.model.ElecPrescription;
      import com.thoughtworks.xstream.annotations.XStreamAlias;
       
      import javax.xml.bind.annotation.XmlAccessType;
      import javax.xml.bind.annotation.XmlAccessorType;
      import javax.xml.bind.annotation.XmlElement;
      import javax.xml.bind.annotation.XmlType;
       
      /**
       * Created by wls on 2017/8/15.
       */
      @XmlAccessorType(XmlAccessType.FIELD)
      @XmlType(propOrder= {"result","errorDesc","elecPrescription"})
      public class AddPrescriptionToMes2ItemResponse {
      //    @XStreamAlias("result")
          @XmlElement(name="result",namespace = XMLNameSpace.ADMIN_URI)
          private String result;
          @XmlElement(required = false)
          private String errorDesc;
          @XmlElement(required = false)
          private ElecPrescription elecPrescription;
       
          public String getResult() {
              return result;
          }
       
          public void setResult(String result) {
              this.result = result;
          }
       
          public String getErrorDesc() {
              return errorDesc;
          }
       
          public void setErrorDesc(String errorDesc) {
              this.errorDesc = errorDesc;
          }
       
          public ElecPrescription getElecPrescription() {
              return elecPrescription;
          }
       
          public void setElecPrescription(ElecPrescription elecPrescription) {
              this.elecPrescription = elecPrescription;
          }
       
          @Override
          public String toString() {
              return "AddPrescriptionToMes2ItemResponse{" +
                  "result='" + result + ''' +
                  ", errorDesc='" + errorDesc + ''' +
                  ", elecPrescription=" + elecPrescription +
                  '}';
          }
      }

        

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      package com.ehaoyao.jobcenter.order.webservices.jztdzy.Util;
       
      import com.thoughtworks.xstream.annotations.XStreamAlias;
       
      import javax.xml.bind.annotation.*;
      import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
       
      /**
       * Created by wls on 2017/8/15.
       */
      //@XStreamAlias("string")
      @XmlRootElement(name = "string",namespace = XMLNameSpace.ADMIN_URI)
      @XmlAccessorType(XmlAccessType.FIELD)
      @XmlType(propOrder= {"response"})
      public class AddPrescriptionToMes2Response {
          @XmlElement(name = "response",namespace = XMLNameSpace.ADMIN_URI)
          private AddPrescriptionToMes2ItemResponse response;
       
          public AddPrescriptionToMes2ItemResponse getResponse() {
              return response;
          }
       
          public void setResponse(AddPrescriptionToMes2ItemResponse response) {
              this.response = response;
          }
       
          @Override
          public String toString() {
              return "AddPrescriptionToMes2Response{" +
                  "response=" + response +
                  '}';
          }
      }

        

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      package com.ehaoyao.jobcenter.order.webservices.jztdzy.Util;
       
      import com.ehaoyao.jobcenter.order.webservices.jztdzy.model.ElecPrescription;
       
      import javax.xml.bind.annotation.XmlAccessType;
      import javax.xml.bind.annotation.XmlAccessorType;
      import javax.xml.bind.annotation.XmlElement;
      import javax.xml.bind.annotation.XmlType;
       
      /**
       * Created by wls on 2017/8/17.
       */
      @XmlAccessorType(XmlAccessType.FIELD)
      @XmlType(propOrder= {"result","errorDesc"},namespace = XMLNameSpace.ADMIN_URI)
      public class SetWXPrescriptionInfoItemResponse {
          @XmlElement(name = "result",namespace = XMLNameSpace.ADMIN_URI)
          private ElecPrescription result;
          private String errorDesc;
       
       
          public ElecPrescription getResult() {
              return result;
          }
       
          public void setResult(ElecPrescription result) {
              this.result = result;
          }
       
          public String getErrorDesc() {
              return errorDesc;
          }
       
          public void setErrorDesc(String errorDesc) {
              this.errorDesc = errorDesc;
          }
       
      }

        

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      package com.ehaoyao.jobcenter.order.webservices.jztdzy.Util;
       
      import com.thoughtworks.xstream.annotations.XStreamAlias;
       
      import javax.xml.bind.annotation.*;
       
      /**
       * Created by wls on 2017/8/17.
       */
      //@XStreamAlias("string")
      @XmlRootElement(name = "string",namespace = XMLNameSpace.ADMIN_URI)
      @XmlAccessorType(XmlAccessType.FIELD)
      @XmlType(propOrder= {"response"})
      public class SetWXPrescriptionInfoResponse {
          @XmlElement(name = "response",namespace = XMLNameSpace.ADMIN_URI)
          private SetWXPrescriptionInfoItemResponse response;
       
          public SetWXPrescriptionInfoItemResponse getResponse() {
              return response;
          }
       
          public void setResponse(SetWXPrescriptionInfoItemResponse response) {
              this.response = response;
          }
      }

        三、测试类

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      package com.ehaoyao.jobcenter.test;
       
      import com.alibaba.fastjson.JSONObject;
      import com.ehaoyao.jobcenter.order.webservices.jztdzy.Util.AddPrescriptionToMes2Response;
      import com.ehaoyao.jobcenter.order.webservices.jztdzy.Util.JAXBUtil;
      import com.ehaoyao.jobcenter.order.webservices.jztdzy.Util.SetWXPrescriptionInfoResponse;
      import com.ehaoyao.jobcenter.order.webservices.jztdzy.model.ElecPrescription;
      import org.apache.poi.ss.formula.functions.T;
       
      import static org.junit.Assert.*;
       
      public class JaxbUtilTest {
       
          public static void main(String[] args) {
              ElecPrescription elecPrescription = new ElecPrescription();
              elecPrescription.setAddress("测试地址");
              elecPrescription.setAge(12);
              elecPrescription.setAgentNum(1);
              elecPrescription.setBillDates("2017-08-19 12:02:21");
              elecPrescription.setBlank2("1");
              elecPrescription.setBlank3("1");
              elecPrescription.setBusinessId("1435");
              String ret = JAXBUtil.toXml(elecPrescription,"UTF-8");
              System.out.println(ret);
              elecPrescription = (ElecPrescription) JAXBUtil.toBean(ret,ElecPrescription.class,"UTF-8");
              System.out.println(elecPrescription);
       
              ret = "<string xmlns="http://WebServices.WS.JointownTech.com//"><response><result>1</result></response></string>";
              AddPrescriptionToMes2Response addPrescriptionToMes2Response = JAXBUtil.toBean(ret,AddPrescriptionToMes2Response.class,"UTF-8");
              System.out.println(addPrescriptionToMes2Response!=null? JSONObject.toJSONString(addPrescriptionToMes2Response):null);
       
              ret = "<string xmlns="http://WebServices.WS.JointownTech.com//"><response><result><BillDates>2017-08-16</BillDates><OutPrescriptionCode>100004</OutPrescriptionCode><OutPrescriptionSn>1004</OutPrescriptionSn><tpyq>代煎</tpyq><zgyq></zgyq><Patient>张三</Patient><Gender>女</Gender><Age>12</Age><CFDates>2017-08-17</CFDates><IsPregnancy>否</IsPregnancy><cflx>外用</cflx><AgentNum>1</AgentNum><Remark></Remark><Opinion></Opinion><BusinessName>好药师三方渠道</BusinessName><orgname>湖北公司</orgname><Dosages>1</Dosages><jyyq>1</jyyq><jyfa>微压(密闭)解表(15min)</jyfa><PatientCode></PatientCode><PictureIP>http://10.2.72.200:131/DCIM/010100003639731150</PictureIP><GoodsDatas><GoodsData><GoodsName>炒蒺藜</GoodsName><Dosage>1</Dosage><GoodsTpyq>无</GoodsTpyq><InvoiceP>0</InvoiceP></GoodsData></GoodsDatas><LogisticsCost>0</LogisticsCost><ProcessingCost>0</ProcessingCost><cfzt>作废</cfzt><cfjd><CFREVIEWSTAFF></CFREVIEWSTAFF><CFREVIEWTIME></CFREVIEWTIME><MIXSTAFF></MIXSTAFF><MIXREQUESTTIME></MIXREQUESTTIME><MIXSURETIME></MIXSURETIME><MIXREVIEWSTAFF></MIXREVIEWSTAFF><MIXREVIEWTIME></MIXREVIEWTIME><SOAKSTAFF></SOAKSTAFF><SOAKREQUESTTIME></SOAKREQUESTTIME><SOAKSURETIME></SOAKSURETIME><TISANESTAFF></TISANESTAFF><TISANEREQUESTTIME></TISANEREQUESTTIME><TISANESURETIME></TISANESURETIME>  <OINTMENTSTAFF></OINTMENTSTAFF><OINTMENTREQUESTTIME></OINTMENTREQUESTTIME><OINTMENTSURETIME></OINTMENTSURETIME><INNERPACKINGSTAFF></INNERPACKINGSTAFF><INNERPACKINGTIME></INNERPACKINGTIME><OUTERPACKINGSTAFF>zyadmin</OUTERPACKINGSTAFF><OUTERPACKINGTIME>2017-08-16 16:41:56</OUTERPACKINGTIME></cfjd><psjd><LogisticsCompany></LogisticsCompany><ExpressNumber></ExpressNumber></psjd></result></response></string>";
              SetWXPrescriptionInfoResponse setWXPrescriptionInfoResponse = JAXBUtil.toBean(ret,SetWXPrescriptionInfoResponse.class,"UTF-8");
              System.out.println(setWXPrescriptionInfoResponse!=null? JSONObject.toJSONString(setWXPrescriptionInfoResponse):null);
          }
      }
      }

        

        四、运行效果

        

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  • 原文地址:https://www.cnblogs.com/chengjun/p/9285246.html
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