java生成解析xml的另外两种方法JAXB

   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。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。

JAXBContext 类提供到 JAXB API 的客户端入口点。它提供了管理实现 JAXB 绑定框架操作所需的 XML/Java 绑定信息的抽象,这些操作包括:解组、编组和验证。

  在JDK1.6时,JAXB 2.0是JDK 1.6的组成部分。JAXB 2.2.3是JDK 1.7的组成部分。

 JDK中JAXB相关的重要Class和Interface:

1、JAXBContext类,是应用的入口,用于管理XML/Java绑定信息。

2、Marshaller接口,将Java对象序列化为XML数据。

3、Unmarshaller接口,将XML数据反序列化为Java对象。

JDK中JAXB相关的重要Annotation:

1、@XmlType,将Java类或枚举类型映射到XML模式类型

2、@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。

3、@XmlAccessorOrder,控制JAXB 绑定类中属性和字段的排序。

4、@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。

5、@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)。

6、@XmlRootElement,将Java类或枚举类型映射到XML元素。

7、@XmlElement,将Java类的一个属性映射到与属性同名的一个XML元素。

8、@XmlAttribute,将Java类的一个属性映射到与属性同名的一个XML属性。

java生成解析xml的另外两种方法JAXB

DataBean.java

package com.xidian.wq.imaopay.model.mesdata.base;

import javax.xml.bind.annotation.XmlRootElement;

/**
*
* @author BYSocket
* 报文头-[报文基础信息]
*/
@XmlRootElement(name="data_bean")
public class DataBean
{
// 版本信息(data_version)
String version; ////消息类型(data_type)
// 000001 - 注册[个人信息Post|Respose]
// 000002 - 绑定银行卡[首次绑定,保存个人信息]
// 000003 - 绑定银行卡[二次,校验个人信息]
// 100001 - 支付[钱包支付]
// 100002 - 查询
//
String data_type; ////订单编号(order_id)
// 总长20位, 有字母要用大写
String batch_no; // 平台账号(platform_account)
String user_name; ////请求状态
//
String trans_state; // 签名信息(msg_sign)
String msg_sign; // 时间戳(randomTime)
private String rd_time; // 随机数(randomNum)
private String rd_num; // 密钥(keySign)
private String k_sign; // 保留域
String reserve; public String getVersion()
{
return version;
} public void setVersion(String version)
{
this.version = version;
} public String getData_type()
{
return data_type;
} public void setData_type(String data_type)
{
this.data_type = data_type;
} public String getBatch_no()
{
return batch_no;
} public void setBatch_no(String batch_no)
{
this.batch_no = batch_no;
} public String getUser_name()
{
return user_name;
} public void setUser_name(String user_name)
{
this.user_name = user_name;
} public String getTrans_state()
{
return trans_state;
} public void setTrans_state(String trans_state)
{
this.trans_state = trans_state;
} public String getMsg_sign()
{
return msg_sign;
} public void setMsg_sign(String msg_sign)
{
this.msg_sign = msg_sign;
} public String getRd_time()
{
return rd_time;
} public void setRd_time(String rd_time)
{
this.rd_time = rd_time;
} public String getRd_num()
{
return rd_num;
} public void setRd_num(String rd_num)
{
this.rd_num = rd_num;
} public String getK_sign()
{
return k_sign;
} public void setK_sign(String k_sign)
{
this.k_sign = k_sign;
} public String getReserve()
{
return reserve;
} public void setReserve(String reserve)
{
this.reserve = reserve;
} }
RegBean.java
package com.xidian.wq.imaopay.model.mesdata.base; import javax.xml.bind.annotation.XmlRootElement; /**
*
* @author BYSocket
* 报文体-[用户注册报文体信息]
*/
@XmlRootElement(name="reg_bean")
public class RegBean
{ // 注册报文体流水号(reg_data_sn)
private String reg_sn; ////用户编号(user_info_id)
// 业务系统的用户编号只做记录不在支付系统中逻辑处理
private Integer user_id; // 注册账号(reg_account)
private String reg_no; // 注册途径(reg_way)
private String reg_way; // 保留域
private String reserve; ////提交日期(set_time)
// 业务系统上传
private String set_time; // 后台信息返回路径(return_url)
private String ret_url; // 备注
String remarks; public String getReg_sn()
{
return reg_sn;
} public void setReg_sn(String reg_sn)
{
this.reg_sn = reg_sn;
} public Integer getUser_id()
{
return user_id;
} public void setUser_id(Integer user_id)
{
this.user_id = user_id;
} public String getReg_no()
{
return reg_no;
} public void setReg_no(String reg_no)
{
this.reg_no = reg_no;
} public String getReg_way()
{
return reg_way;
} public void setReg_way(String reg_way)
{
this.reg_way = reg_way;
} public String getReserve()
{
return reserve;
} public void setReserve(String reserve)
{
this.reserve = reserve;
} public String getSet_time()
{
return set_time;
} public void setSet_time(String set_time)
{
this.set_time = set_time;
} public String getRet_url()
{
return ret_url;
} public void setRet_url(String ret_url)
{
this.ret_url = ret_url;
} public String getRemarks()
{
return remarks;
} public void setRemarks(String remarks)
{
this.remarks = remarks;
} } 注册报文体MsgRegBean.java,支持内容的列表。 package com.xidian.wq.imaopay.model.mesdata; import java.util.List; import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlElementWrapper;
import javax.xml.bind.annotation.XmlRootElement; import com.xidian.wq.imaopay.model.mesdata.base.DataBean;
import com.xidian.wq.imaopay.model.mesdata.base.RegBean; @XmlRootElement( name = "msg_bean" )
public class MsgRegBean
{
private DataBean dataBean; private List<RegBean> regBeans; public DataBean getDataBean()
{
return dataBean;
} @XmlElement(name = "data_bean")
public void setDataBean(DataBean dataBean)
{
this.dataBean = dataBean;
} @XmlElementWrapper(name = "reg_beans")
@XmlElement(name = "reg_bean")
public List<RegBean> getRegBeans()
{
return regBeans;
} public void setRegBeans(List<RegBean> regBeans)
{
this.regBeans = regBeans;
} }
然后针对的我们用Jaxb实现一个转换的Util类:
package com.xidian.wq.imaopay.util;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List; import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller; import com.alibaba.fastjson.JSON;
import com.xidian.wq.imaopay.model.mesdata.MsgRegBean;
import com.xidian.wq.imaopay.model.mesdata.base.DataBean;
import com.xidian.wq.imaopay.model.mesdata.base.RegBean; /**
*
* @author BYSocket
* Jaxb2.0 处理Xml与Object转换
*
*/
public class JaxbObjectAndXmlUtil
{ /**
* @param xmlStr 字符串
* @param c 对象Class类型
* @return 对象实例
*/
@SuppressWarnings("unchecked")
public static <T> T xml2Object(String xmlStr,Class<T> c)
{
try
{
JAXBContext context = JAXBContext.newInstance(c);
Unmarshaller unmarshaller = context.createUnmarshaller(); T t = (T) unmarshaller.unmarshal(new StringReader(xmlStr)); return t; } catch (JAXBException e) { e.printStackTrace(); return null; } } /**
* @param object 对象
* @return 返回xmlStr
*/
public static String object2Xml(Object object)
{
try
{
StringWriter writer = new StringWriter();
JAXBContext context = JAXBContext.newInstance(object.getClass());
Marshaller marshal = context.createMarshaller(); marshal.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); // 格式化输出
marshal.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");// 编码格式,默认为utf-8
marshal.setProperty(Marshaller.JAXB_FRAGMENT, false);// 是否省略xml头信息
marshal.setProperty("jaxb.encoding", "utf-8");
marshal.marshal(object,writer); return new String(writer.getBuffer()); } catch (Exception e) { e.printStackTrace(); return null;} } public static void main(String[] args)
{
/** 构造测试报文头对象 */
DataBean dataBean = new DataBean();
dataBean.setBatch_no("N20150204");
dataBean.setData_type("000001");
dataBean.setVersion("v1.0");
dataBean.setUser_name("xx");
dataBean.setMsg_sign("未知");
dataBean.setRd_num("6631383");
dataBean.setRd_time("20150204");
dataBean.setK_sign("75CC479AAC09F00BA28F0E968B1BC9D1B90ADCC2"); /** 构造测试报文体对象 */
RegBean regBean = new RegBean();
regBean.setReg_sn("REG20150204");
regBean.setUser_id(12);
regBean.setReg_no("33");
regBean.setReg_way("pc");
regBean.setSet_time("20150204 16:18");
regBean.setRet_url("未知");
regBean.setRemarks("无备注"); MsgRegBean msgBean = new MsgRegBean();
List<RegBean> regBeans = new ArrayList<RegBean>();
regBeans.add(regBean);
regBeans.add(regBean); msgBean.setRegBeans(regBeans);
msgBean.setDataBean(dataBean); String xmlStr = JaxbObjectAndXmlUtil.object2Xml(msgBean);//构造报文 XML 格式的字符串
System.out.println("对象转xml报文: \n"+xmlStr); MsgRegBean msgBean2 = JaxbObjectAndXmlUtil.xml2Object(xmlStr, MsgRegBean.class);
System.out.println("报文转xml转: \n"+JSON.toJSONString(msgBean2));
}
} </font> 运行下测试main函数,可以得到如下的输出: 对象转xml报文:
<?xmlversion="1.0"encoding="utf-8"standalone="yes"?>
<msg_bean>
<data_bean>
<batch_no>N20150204</batch_no>
<data_type>000001</data_type>
<k_sign>75CC479AAC09F00BA28F0E968B1BC9D1B90ADCC2</k_sign>
<msg_sign>未知</msg_sign>
<rd_num>6631383</rd_num>
<rd_time>20150204</rd_time>
<user_name>xx</user_name>
<version>v1.0</version>
</data_bean>
<reg_beans>
<reg_bean>
<reg_no>33</reg_no>
<reg_sn>REG20150204</reg_sn>
<reg_way>pc</reg_way>
<remarks>无备注</remarks>
<ret_url>未知</ret_url>
<set_time>20150204 16:18</set_time>
<user_id>12</user_id>
</reg_bean>
<reg_bean>
<reg_no>33</reg_no>
<reg_sn>REG20150204</reg_sn>
<reg_way>pc</reg_way>
<remarks>无备注</remarks>
<ret_url>未知</ret_url>
<set_time>20150204 16:18</set_time>
<user_id>12</user_id>
</reg_bean>
</reg_beans>
</msg_bean> 报文转xml转:
{"dataBean":{"batch_no":"N20150204","data_type":"000001","k_sign":"75CC479AAC09F00BA28F0E968B1BC9D1B90ADCC2","msg_sign":"未知","rd_num":"6631383","rd_time":"20150204","user_name":"xx","version":"v1.0"},"regBeans":[{"reg_no":"33","reg_sn":"REG20150204","reg_way":"pc","remarks":"无备注","ret_url":"未知","set_time":"20150204 16:18","user_id":12},{"reg_no":"33","reg_sn":"REG20150204","reg_way":"pc","remarks":"无备注","ret_url":"未知","set_time":"20150204 16:18","user_id":12}]}
代码中间注意点:
Marshaller.JAXB_FORMATTED_OUTPUT :决定是否在转换成xml时同时进行格式化(即按标签自动换行,否则即是一行的xml) 。 Marshaller.JAXB_ENCODING :xml的编码方式。 Marshaller.JAXB_FRAGMENT :是否省略xml头信息 marshal.setProperty(“jaxb.encoding”, “utf-8″); : 设置编码格式 utf-8

转自:http://my.oschina.net/jeffli1993/blog/376846

上一篇:使用Vitamio打造自己的Android万能播放器(3)——本地播放(主界面、播放列表)


下一篇:在AndroidManifest.xml文件中设置Android程序的启动界面方法