我的
XML Schema中有一个元素定义如下:
<xs:complexType name="MyNumberCodeType"> <xs:sequence> <xs:element name="Code" type="NumberCodeValueType" maxOccurs="unbounded" /> </xs:sequence> </xs:complexType>
其中NumberCodeValueType是:
<xs:simpleType name="NumberCodeValueType"> <xs:restriction base="xs:int"> <xs:pattern value="[0-7]{7}"/> </xs:restriction> </xs:simpleType>
也就是说,我的号码可以从0开始.我不能修改这个模式.我正在使用JAXB生成我的Java类.不幸的是,Code元素的访问器将一个整数列表作为参数,这意味着所有前导0都被剥离(因为从我可以看出,使用整数类型时,没有办法在Java中保持前导0)!
有什么办法可以解决这个问题吗?
谢谢你的帮助!
解决方法
您可以执行以下操作:
的NumberFormatter
你可以通过编写你自己的格式化来做到这一点:
package forum7182533; public class NumberFormatter { public static String printInt(Integer value) { String result = String.valueOf(value); for(int x=0,length = 7 - result.length(); x<length; x++) { result = "0" + result; } return result; } public static Integer parseInt(String value) { return Integer.valueOf(value); } }
XMLSchema(format.xsd)
那么当你要从你的XML Schema生成你的类时:
<?xml version="1.0" encoding="UTF-8"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="root"> <xs:complexType> <xs:sequence> <xs:element name="number" type="NumberCodeValueType" /> </xs:sequence> </xs:complexType> </xs:element> <xs:simpleType name="NumberCodeValueType"> <xs:restriction base="xs:int"> <xs:pattern value="[0-7]{7}" /> </xs:restriction> </xs:simpleType> </xs:schema>
bindings.xml
您将利用JAXB绑定文件来引用您的格式化程序:
<jxb:bindings xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:jxb="http://java.sun.com/xml/ns/jaxb" version="2.1"> <jxb:bindings schemaLocation="format.xsd"> <!--jxb:bindings node="//xs:simpleType[@name='NumberCodeValueType']" --> <jxb:bindings node="//xs:element[@name='number']"> <jxb:property> <jxb:baseType> <jxb:javaType name="java.lang.Integer" parseMethod="forum7182533.NumberFormatter.parseInt" printMethod="forum7182533.NumberFormatter.printInt" /> </jxb:baseType> </jxb:property> </jxb:bindings> </jxb:bindings> </jxb:bindings>
XJC电话
xjc -d out -p forum7182533 -b bindings.xml format.xsd
适配器1
这将导致创建一个利用您的格式化程序的XmlAdapter:
package forum7182533; import javax.xml.bind.annotation.adapters.XmlAdapter; public class Adapter1 extends XmlAdapter<String,Integer> { public Integer unmarshal(String value) { return (forum7182533.NumberFormatter.parseInt(value)); } public String marshal(Integer value) { return (forum7182533.NumberFormatter.printInt(value)); } }
根
将使用@XmlJavaTypeAdapter注释从您的域对象引用XmlAdapter:
package forum7182533; import javax.xml.bind.annotation.XmlAccessType; import javax.xml.bind.annotation.XmlAccessorType; import javax.xml.bind.annotation.XmlElement; import javax.xml.bind.annotation.XmlRootElement; import javax.xml.bind.annotation.XmlType; import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter; @XmlAccessorType(XmlAccessType.FIELD) @XmlType(name = "",propOrder = { "number" }) @XmlRootElement(name = "root") public class Root { @XmlElement(required = true,type = String.class) @XmlJavaTypeAdapter(Adapter1 .class) protected Integer number; public Integer getNumber() { return number; } public void setNumber(Integer value) { this.number = value; } }
演示
现在,如果您运行以下演示代码:
package forum7182533; import javax.xml.bind.JAXBContext; import javax.xml.bind.Marshaller; public class Demo { public static void main(String[] args) throws Exception { JAXBContext jc = JAXBContext.newInstance(Root.class); Root root = new Root(); root.setNumber(4); Marshaller marshaller = jc.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT,true); marshaller.marshal(root,System.out); } }
产量
您将获得所需的输出:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <root> <number>0000004</number> </root>