一、新建实体类
public class User implements Serializable {
private String id;
private String name;
private Integer age;
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;
}
@Override
public String toString() {
final StringBuffer sb = new StringBuffer("User{");
sb.append("id='").append(id).append('\'');
sb.append(", name='").append(name).append('\'');
sb.append(", age=").append(age);
sb.append('}');
return sb.toString();
}
}
二、新建xsd文件
<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.myself.com/schema/user"
xmlns:tns="http://www.myself.com/schema/user"
elementFormDefault="qualified">
<element name="user">
<complexType>
<attribute name ="id" type = "string"/>
<attribute name ="name" type = "string"/>
<attribute name ="age" type = "integer"/>
</complexType>
</element>
</schema>
三、新建NamespaceHandler和BeanDefinitionParser
public class UserBeanDefinitionParser extends AbstractSingleBeanDefinitionParser {
@Override
protected Class<?> getBeanClass(Element element) {
return User.class;
}
@Override
protected void doParse(Element element, BeanDefinitionBuilder builder) {
if (element.hasAttribute("id")) {
builder.addPropertyValue("id", element.getAttribute("id"));
}
if (element.hasAttribute("name")) {
builder.addPropertyValue("name", element.getAttribute("name"));
}
if (element.hasAttribute("age")) {
builder.addPropertyValue("age", element.getAttribute("age"));
}
}
}
public class UserNamespaceHandler extends NamespaceHandlerSupport {
@Override
public void init() {
registerBeanDefinitionParser("user", new UserBeanDefinitionParser ());
}
}
四、在resources目录下建立META-INF目录并新建spring.handlers和spring.schemas
spring.handlers
http\://www.myself.com/schema/user=selftag.UserNamespaceHandler
spring.schemas
http\://www.myself.com/schema/user.xsd=META-INF/user.xsd
五、使用
在app-test.xml文件的beans标签中加入
xmlns:aaa="http://www.myself.com/schema/user"
http://www.myself.com/schema/user http://www.myself.com/schema/user.xsd
bean定义
<aaa:user name="李四" id="123" age="45"></aaa:user>
运行
ApplicationContext applicationContext = new MyClassPathApplicationContext("classpath:app-${user}.xml");
User user = applicationContext.getBean(User.class);
System.out.println(user);