dubbo怎么實(shí)現(xiàn)spring自定義標(biāo)簽

本篇內(nèi)容主要講解“dubbo怎么實(shí)現(xiàn)spring自定義標(biāo)簽”，感興趣的朋友不妨來(lái)看看。本文介紹的方法操作簡(jiǎn)單快捷，實(shí)用性強(qiáng)。下面就讓小編來(lái)帶大家學(xué)習(xí)“dubbo怎么實(shí)現(xiàn)spring自定義標(biāo)簽”吧!

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做dubbo的配置時(shí)很容易發(fā)現(xiàn)，dubbo有一套自己的標(biāo)簽，提供給開(kāi)發(fā)者配置，其實(shí)每一個(gè)標(biāo)簽對(duì)應(yīng)著一個(gè) 實(shí)體，在容器啟動(dòng)的時(shí)候，dubbo會(huì)對(duì)所有的配置進(jìn)行解析然后將解析后的內(nèi)容設(shè)置到實(shí)體里，最終dubbo會(huì)根據(jù)實(shí)體中的值生成貫穿全局的統(tǒng)一URL。利用自定義標(biāo)簽使配置簡(jiǎn)單明了化，與spring完美融合。

下面自己寫(xiě)一個(gè)自定義標(biāo)簽，主要需要如下幾個(gè)步驟：

1、編寫(xiě)實(shí)體類(lèi)

2、編寫(xiě)Parser解析類(lèi)

3、編寫(xiě)NameSpaceHandle類(lèi)

4、配置spring.handlers

5、配置spring.schemas

6、配置customTag .xsd

標(biāo)簽實(shí)體類(lèi)如下：

public class CustomTag {

private String id;

private String name;

private Integer age;

private String profession;

private String address;

private String phone;

public String getId() {

return id;

}

public void setId(String id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public Integer getAge() {

return age;

}

public void setAge(Integer age) {

this.age = age;

}

public String getProfession() {

return profession;

}

public void setProfession(String profession) {

this.profession = profession;

}

public String getAddress() {

return address;

}

public void setAddress(String address) {

this.address = address;

}

public String getPhone() {

return phone;

}

public void setPhone(String phone) {

this.phone = phone;

}

public String toString(){

StringBuffer sb = new StringBuffer();

sb.append(id + "\n");

sb.append(name + "\n");

sb.append(age + "\n");

sb.append(profession + "\n");

sb.append(address + "\n");

sb.append(phone + "\n");

return sb.toString();

}

標(biāo)簽的解析類(lèi)如下:

public class CustomTagBeanDefinitionParser extends AbstractSingleBeanDefinitionParser {

private final Class<?> beanClass;

private final boolean required;

public CustomTagBeanDefinitionParser (Class<?> beanClass, boolean required) {

this.beanClass = beanClass;

this.required = required;

}

protected Class getBeanClass(Element element) {

return CustomTag.class;

}

protected void doParse(Element element, BeanDefinitionBuilder builder) {

//通過(guò)配置文件獲取相應(yīng)的值，設(shè)置到bean的屬性中

String id = element.getAttribute("id");

String name = element.getAttribute("name");

String age = element.getAttribute("age");

String profession = element.getAttribute("profession");

String address = element.getAttribute("address");

String phone = element.getAttribute("phone");

if (StringUtils.hasText(id)) {

builder.addPropertyValue("id", id);

}

if (StringUtils.hasText(name)) {

builder.addPropertyValue("name", name);

}

if (StringUtils.hasText(age)) {

builder.addPropertyValue("age", age);

}

if (StringUtils.hasText(profession)) {

builder.addPropertyValue("profession", profession);

}

if (StringUtils.hasText(address)) {

builder.addPropertyValue("address", address);

}

if (StringUtils.hasText(phone)) {

builder.addPropertyValue("phone", phone);

}

NameSpaceHandle類(lèi)如下：

public class CustomTagNamespaceHandler extends NamespaceHandlerSupport {

@Override

public void init() {

//實(shí)現(xiàn)init方法,解析CustomTag標(biāo)簽

registerBeanDefinitionParser("customTag",new CustomTagBeanDefinitionParser(CustomTag.class,true));

}

spring.handlers配置，前面那一串其實(shí)可以隨便配置，只要一會(huì)和后面的配置一致即可

http\://www.51gitee.net/schema/customTag=springNameSpace.CustomTagNamespaceHandler

spring.schemas配置

http\://www.51gitee.net/schema/customTag/customTag.xsd=META-INF/customTag.xsd

customTag.xsd的配置

<?xml version="1.0" encoding="UTF-8"?>

<xsd:schema

xmlns="http://www.51gitee.net/schema/customTag"

xmlns:xsd="http://www.w3.org/2001/XMLSchema"

xmlns:beans="http://www.springframework.org/schema/beans"

targetNamespace="http://www.51gitee.net/schema/customTag"

elementFormDefault="qualified"

attributeFormDefault="unqualified">

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

<xsd:element name="customTag" type="customTagType">

<xsd:annotation>

<xsd:documentation><![CDATA[ The customTag config ]]></xsd:documentation>

</xsd:annotation>

</xsd:element>

<xsd:complexType name="customTagType">

<xsd:attribute name="id" type="xsd:ID">

<xsd:annotation>

<xsd:documentation><![CDATA[ The unique identifier for a bean. ]]></xsd:documentation>

</xsd:annotation>

</xsd:attribute>

<xsd:attribute name="name" type="xsd:string" use="required">

<xsd:annotation>

<xsd:documentation><![CDATA[ The customTag name. ]]></xsd:documentation>

</xsd:annotation>

</xsd:attribute>

<xsd:attribute name="age" type="xsd:int">

<xsd:annotation>

<xsd:documentation><![CDATA[ The customTag age. ]]></xsd:documentation>

</xsd:annotation>

</xsd:attribute>

<xsd:attribute name="profession" type="xsd:string">

<xsd:annotation>

<xsd:documentation><![CDATA[ The customTag profession. ]]></xsd:documentation>

</xsd:annotation>

</xsd:attribute>

<xsd:attribute name="address" type="xsd:string">

<xsd:annotation>

<xsd:documentation><![CDATA[ The customTag address. ]]></xsd:documentation>

</xsd:annotation>

</xsd:attribute>

<xsd:attribute name="phone" type="xsd:string">

<xsd:annotation>

<xsd:documentation><![CDATA[ The customTag phone. ]]></xsd:documentation>

</xsd:annotation>

</xsd:attribute>

</xsd:complexType>

</xsd:schema>

最后測(cè)試

在新建一個(gè)spring的配置文件如下

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:common="http://www.51gitee.net/schema/customTag"

xsi:schemaLocation="

http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-3.2.xsd

http://www.oschina.net/schema/customTag

http://www.oschina.net/schema/customTag/customTag.xsd">

<common:customTag id="test" name="chewenliang" address="bei jing" age="12" phone="18618152379" profession="技術(shù)" />

</beans>

在java代碼中測(cè)試

public class TestNameSpace {

public static void main(String[] args) {

ApplicationContext context = new ClassPathXmlApplicationContext("spring-test.xml");

CustomTag customTag= (CustomTag) context.getBean("test");

System.out.println(customTag.toString());

}

輸出結(jié)果：

test

chewenliang

技術(shù)

bei jing

18618152379

spring的自定義標(biāo)簽自己很容易實(shí)現(xiàn)，具體要看在實(shí)際項(xiàng)目中如何正確的實(shí)用它，接下來(lái)會(huì)記錄dubbo是如何解析、暴露服務(wù)。

到此，相信大家對(duì)“dubbo怎么實(shí)現(xiàn)spring自定義標(biāo)簽”有了更深的了解，不妨來(lái)實(shí)際操作一番吧！這里是創(chuàng)新互聯(lián)網(wǎng)站，更多相關(guān)內(nèi)容可以進(jìn)入相關(guān)頻道進(jìn)行查詢(xún)，關(guān)注我們，繼續(xù)學(xué)習(xí)！

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