spring 自定义标签实现传递list属性

本例的全部源代码：https://git.oschina.net/mn_1127/spring-ext.git

1. 定义XSD文件：

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns="http://www.37link.com/schema/scf"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:tool="http://www.springframework.org/schema/tool"
targetNamespace="http://www.37link.com/schema/scf">
<xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
<xsd:import namespace="http://www.springframework.org/schema/beans" />
<xsd:import namespace="http://www.springframework.org/schema/tool" />

<xsd:element name="student" type="consumerType">
<xsd:annotation>
<xsd:documentation><![CDATA[ this is desc ]]></xsd:documentation>
</xsd:annotation>
</xsd:element>
<xsd:element name="own" type="ownType">
<xsd:annotation>
<xsd:documentation><![CDATA[ this is desc ]]></xsd:documentation>
</xsd:annotation>
</xsd:element>
<xsd:complexType name="ownType">
<xsd:attribute name="value" type="xsd:string" use="required">
<xsd:annotation>
<xsd:documentation><![CDATA[ this is desc ]]></xsd:documentation>
</xsd:annotation>
</xsd:attribute>
</xsd:complexType>

<xsd:complexType name="consumerType">
<xsd:complexContent>
<xsd:extension base="abstractServiceType">
<xsd:sequence minOccurs="0" maxOccurs="unbounded">
<xsd:element ref="own" minOccurs="0" maxOccurs="unbounded" />
</xsd:sequence>
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>
<xsd:complexType name="abstractServiceType">

<xsd:attribute name="id" type="xsd:ID" use="required">
<xsd:annotation>
<xsd:documentation><![CDATA[ this is desc ]]></xsd:documentation>
</xsd:annotation>
</xsd:attribute>
<xsd:attribute name="name" type="xsd:string" use="required">
<xsd:annotation>
<xsd:documentation><![CDATA[ this is desc ]]></xsd:documentation>
</xsd:annotation>
</xsd:attribute>
<xsd:attribute name="age" type="xsd:int" use="required">
<xsd:annotation>
<xsd:documentation><![CDATA[ this is desc ]]></xsd:documentation>
</xsd:annotation>
</xsd:attribute>
</xsd:complexType>
</xsd:schema>

2. 设置：spring.handlers

http\://www.37link.com/schema/scf=com.mm.spring_ext.MyNamespaceHandler

3. 设置：spring.schemas

http\://www.37link.com/schema/scf/scf.xsd=com/mm/spring_ext/scf.xsd

4. 定义spring对自定义的命名空间进行解析的操作

package com.mm.spring_ext;

import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
import org.springframework.util.StringUtils;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class PeopleBeanDefinitionParser extends AbstractSingleBeanDefinitionParser {
protected Class getBeanClass(Element element) {
return People.class;
}

protected void doParse(Element element, BeanDefinitionBuilder bean) {
String name = element.getAttribute("name");
String age = element.getAttribute("age");
String id = element.getAttribute("id");
NodeList elementSons = element.getChildNodes();
if (StringUtils.hasText(id)) {
bean.addPropertyValue("id", id);
}
if (StringUtils.hasText(name)) {
bean.addPropertyValue("name", name);
}
if (StringUtils.hasText(age)) {
bean.addPropertyValue("age", Integer.valueOf(age));
}
if (elementSons != null && elementSons.getLength() > 0) {
List<String> list = new ArrayList<String>();
for (int i = 0; i < elementSons.getLength(); i++) {
Node node = elementSons.item(i);
if (node instanceof Element) {
if ("own".equals(node.getNodeName()) || "own".equals(node.getLocalName())) {
String value = ((Element) node).getAttribute("value");
list.add(value);
}
}
}
bean.addPropertyValue("own", list);
}

}
}

5.将解析类注册到命名空间中的实现

package com.mm.spring_ext;

import org.springframework.beans.factory.xml.NamespaceHandlerSupport;

public class MyNamespaceHandler extends NamespaceHandlerSupport {
public void init() {
registerBeanDefinitionParser("student", new PeopleBeanDefinitionParser());
}
}

6.定义需要spring管理bean的实体 People.java

package com.mm.spring_ext;

import java.util.List;

public class People {
private String id;
private String name;
private Integer age;
private List<String> own;

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 List<String> getOwn() {
return own;
}

public void setOwn(List<String> own) {
this.own = own;
}

}

7. 然后配置spring的xml配置文件test.xml

<?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:scf="http://www.37link.com/schema/scf"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.37link.com/schema/scf http://www.37link.com/schema/scf/scf.xsd ">
<scf:student id="scf1" name="liujie" age="23">
<scf:own value="dddddd" />
<scf:own value="aaaa" />
</scf:student>
</beans>

8. 最后写一个测试类，简单起见，直接用main函数的方式

package com.mm.spring_ext_test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.mm.spring_ext.People;

public class AppTest {
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("test.xml");
People f = (People) ctx.getBean("scf1");
if (f != null && f.getOwn() != null && f.getOwn().size() > 0) {
for (String own : f.getOwn()) {
System.out.println(own);
}
}
}
}

本例的全部源代码：https://git.oschina.net/mn_1127/spring-ext.git