自定义xsd扩展

扩展xsd很简单,官方文档送上:https://docs.spring.io/spring/docs/4.2.x/spring-framework-reference/html/xml-custom.html

照着做没有多大问题,自己也记录一下

第一步:定义bean的结构,自定义xsd就是通过xml生成一个bean而已,这个bean是你提前描述好的,需要怎样生成的,所以当然要提前定义好

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns="http://www.mycompany.com/schema/mynsgyc"
            xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            xmlns:beans="http://www.springframework.org/schema/beans"
            targetNamespace="http://www.mycompany.com/schema/mynsgyc"
            elementFormDefault="qualified"
            attributeFormDefault="unqualified">

    <xsd:import namespace="http://www.springframework.org/schema/beans"/>

    <xsd:element name="gycdate">
        <xsd:complexType>
            <xsd:complexContent>
                <xsd:extension base="beans:identifiedType">
                    <xsd:attribute name="isgyc" type="xsd:boolean"/>
                    <xsd:attribute name="pattern" type="xsd:string" use="required"/>
                </xsd:extension>
            </xsd:complexContent>
        </xsd:complexType>
    </xsd:element>
</xsd:schema>

 第二步,解析这个xml的beanhandler,既然定义了bean的结构,当然需要知道具体是哪个类来如何生成bean,这个就是需要一个hander 来处理一下,spring提供了解析xml的工具类,所以,你只需要告诉spring,如何把这个xml变成bean就好,具体解析这个恶心的事情,交给spring就好

public class MyNamespaceHandler extends NamespaceHandlerSupport {
    @Override
    public void init() {
        registerBeanDefinitionParser("gycdate", new SimpleMyBeanDefinitionParser());
    }
}


public class SimpleMyBeanDefinitionParser  extends AbstractSingleBeanDefinitionParser {


    @Override
    protected Class getBeanClass(Element element) {
        return Mybean.class;
    }

    @Override
    protected void doParse(Element element, BeanDefinitionBuilder bean) {
        // this will never be null since the schema explicitly requires that a value be supplied
        String pattern = element.getAttribute("pattern");
        bean.addConstructorArgValue(pattern);
        SimpleDateFormat dateFormat=new SimpleDateFormat();
        // this however is an optional property
        String lenient = element.getAttribute("isgyc");
        if (StringUtils.hasText(lenient)) {
            bean.addPropertyValue("isgyc", Boolean.valueOf(lenient));
        }
    }
}

 第三步,将xml命令空间和xsd文件,hander三者关联起来,如何关联,resource下面的spring.handers和spring.schemas就好

spring.handers
http\://www.mycompany.com/schema/mynsgyc=com.xxx.xxx.MyNamespaceHandler

spring.schemas
http\://www.mycompany.com/schema/mynsgyc/spring-mynsgyc.xsd=com/xxx/xxx/TestXsd.xml

最后可以通过注解获取到这个bean

  @Autowired
    private Mybean mybean;

然后就done了

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转载自turbosky.iteye.com/blog/2435641