Spring Castor用法示例详解

1. Spring和脚轮整合
2. Spring和脚轮整合的例子

借助CastorMarshaller类的帮助, 我们可以使用castor将Java对象编组为xml, 反之亦然。它是Marshaller和Unmarshaller接口的实现类。默认情况下, 它不需要任何进一步的配置。

Spring和Castor集成的示例(将Java对象编组为XML)

你需要创建以下文件, 以使用带有Castor的Spring将Java对象编组为XML：

1. Employee.java
2. applicationContext.xml
3. mapping.xml
4. Client.java

所需的Jar文件

要运行此示例, 你需要加载：

• Spring Core jar文件
• Spring Web jar文件
• castor-1.3.jar
• castor-1.3-core.jar

下载spring的所有jar文件, 包括core, web, aop, mvc, j2ee, remoting, oxm, jdbc, orm等。

下载castor-1.3.jar

下载castor-1.3-core.jar

Employee.java

如果定义了三个属性id, setter和getter的名称和薪水。

package com.srcmini;
public class Employee {
private int id;
private String name;
private float salary;

public int getId() {
	return id;
}
public void setId(int id) {
	this.id = id;
}
public String getName() {
	return name;
}
public void setName(String name) {
	this.name = name;
}
public float getSalary() {
	return salary;
}
public void setSalary(float salary) {
	this.salary = salary;
}
}

applicationContext.xml

它定义了一个bean castorMarshallerBean, 其中Employee类与OXM框架绑定在一起。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<bean id="castorMarshallerBean" class="org.springframework.oxm.castor.CastorMarshaller">
		<property name="targetClass" value="com.srcmini.Employee"></property>
		<property name="mappingLocation" value="mapping.xml"></property>
	</bean>
</beans>

mapping.xml

<?xml version="1.0"?>
<!DOCTYPE mapping PUBLIC "-//EXOLAB/Castor Mapping DTD Version 1.0//EN"
                         "http://castor.org/mapping.dtd">
 <mapping>
 	<class name="com.srcmini.Employee" auto-complete="true" >
 		<map-to xml="Employee" ns-uri="http://www.srcmini02.com" ns-prefix="dp"/>
 		<field name="id" type="integer">
 			<bind-xml name="id" node="attribute"></bind-xml>
 		</field>
 		<field name="name">
 			<bind-xml name="name"></bind-xml>
 		</field>
 		<field name="salary">
 			<bind-xml name="salary" type="float"></bind-xml>
 		</field>
 		
 	</class>
 	
 </mapping>

Client.java

它从applicationContext.xml文件获取Marshaller的实例, 并调用marshal方法。

package com.srcmini;
import java.io.FileWriter;
import java.io.IOException;
import javax.xml.transform.stream.StreamResult;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.oxm.Marshaller;

public class Client{
 public static void main(String[] args)throws IOException{
  ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
  Marshaller marshaller = (Marshaller)context.getBean("castorMarshallerBean");
		
  Employee employee=new Employee();
  employee.setId(101);
  employee.setName("Sonoo Jaiswal");
  employee.setSalary(100000);
		
  marshaller.marshal(employee, new StreamResult(new FileWriter("employee.xml")));
  
  System.out.println("XML Created Sucessfully");
 }
}

示例输出

employee.xml

<?xml version="1.0" encoding="UTF-8"?>
<dp:Employee xmlns:dp="http://www.srcmini02.com" id="101">
<dp:name>Sonoo Jaiswal</dp:name>
<dp:salary>100000.0</dp:salary>
</dp:Employee>

下载此示例(使用Myeclipse IDE开发)

下载此示例(使用Eclipse IDE开发)