Spring5 自定义标签开发

spring5 自定义脚本开发步骤

1 定义bean，

public class User {private String id;private String userName;private String email;private String password;public String getId() {return id;}public void setId(String id) {this.id = id;}public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}
}

2 自定义 BeanDefinitionParser，继承 AbstractSingleBeanDefinitionParser

import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
import org.springframework.util.StringUtils;
import org.w3c.dom.Element;public class UserBeanDefinitionParser extends AbstractSingleBeanDefinitionParser {protected Class<?> getBeanClass(Element element){return User.class;}protected void doParse(Element element, BeanDefinitionBuilder builder){String userName = element.getAttribute("userName");String email = element.getAttribute("email");String password = element.getAttribute("password");String id = element.getAttribute("id");if (StringUtils.hasText(userName)){builder.addPropertyValue("userName", userName);}if (StringUtils.hasText(email)){builder.addPropertyValue("email", email);}if (StringUtils.hasText(password)){builder.addPropertyValue("password", password);}if (StringUtils.hasText(id)){builder.addPropertyValue("id", id);}}
}

3 定义 NameSpaceHandler，继承 NamespaceHandlerSupport，

import org.springframework.beans.factory.xml.NamespaceHandlerSupport;public class UserNameSpaceHandler extends NamespaceHandlerSupport {@Overridepublic void init() {registerBeanDefinitionParser("user", new UserBeanDefinitionParser());}
}

4 自定义配置文件，在resource/META-INF 目录下，新建spring.handlers , spring.schemas , user.xsd 文件。

spring.handlers 文件内容如下：

http\://www.gientech.com/schema/user=com.gientech.selftag.UserNameSpaceHandler

spring.schemas 文件内容如下：

http\://www.gientech.com/schema/user.xsd=META-INF/user.xsd

spring.xsd 文件内容如下：

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"targetNamespace="http://www.gientech.com/schema/user"xmlns:tns="http://www.gientech.com/schema/user"elementFormDefault="qualified"><element name="user"><complexType><attribute name="id" type="string"></attribute><attribute name="userName" type="string"></attribute><attribute name="email" type="string"></attribute><attribute name="password" type="string"></attribute></complexType></element>
</schema>

5 spring-content.xml 引入命名空间，使用新标签配置bean