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