文章Points:
1、不认识到犯错,然后得到永久的教训。
2、认识JAXB
3、代码实战
1、不认识到犯错,然后得到永久的教训。
也不是所谓的教训吧,真正的教训来自于对错误的剖析理解很深刻。然后有种“吃一堑,长一智”的感觉才叫教训。近日和团队工头们用CXF3.0和Spring4.0开发一个平台,模仿着第三方支付,用xml进行数据交互。
因此,搜了下。果断用了dom4j,用自己键盘papa打了个叫做XmlOjbUtil的工具类。后来百度下,虽然不是万能的百度。但也要表扬下,发现人家搭着REST的CXF却集成了Jaxb。
果断抛弃了!(有时候决定就需要这么果断。)
先做个铺垫,我们先说下一些知识点:
CXF实现webService项目,有两种模式可以开发。Jax-ws实现经典的Web Service和Jax-rs实现REST标准。在Java EE 5/6中,Jaxb可以方便地集成,负责xml与JavaBean的映射。其实Jaxb也可以作为xml解析的一种技术。
2、认识JAXB
JAXB(Java Architecture for XML Binding)是根据XML Schema映射到JavaBean的技术。过程中,JAXB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。
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。
提前修一下文档知识吧:
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。
3、代码实战
我们既然要设计报文,所以我这边拿出来一个注册的Bean的设计。首先我们设计注册的Bean,代码如下:
DataBean.java
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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
// 200001
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
// 000
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
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< font size = "4" face = "宋体" >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;
}
} </ font >
|
注册报文体MsgRegBean.java,支持内容的列表。
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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:
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< font size = "4" face = "宋体" >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:
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对象转xml报文: <? xml version = "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