Castor (一) -- 默认绑定

    在mq的数据传输过程中，往往将java bean与xml进行相互转换。
 
castor是exolab group下面的一个开放源代码的项目，提供了java bean与xml之间相互转换的功能。
他提供默认方式，也支持用户diy。
 
<span style="color: #ff0000;">默认方式：</span>
<span style="color: #ff0000;">1. 基本类型属性：int，boolean等以属性的方式输出</span>
<span style="color: #ff0000;">2. 对象类型属性：以子元素的方式输出</span>
 
一. 实例
 
导入包castor-1.2-xml.jar以及它的依赖包commons-logging-1.1.1.jar，xerces.jar（xerces-1_4_4）
注：现在最新的castor版本为1.3.2，但是是jdk6环境下编译的，所以需要在jdk6下才能运行
 
address.java
 

package com.siyuan.castor;public class address {  private string street; /**  * @return the street  */ public string getstreet() {  return street; } /**  * @param street the street to set  */ public void setstreet(string street) {  this.street = street; } /* (non-javadoc)  * @see java.lang.object#tostring()  */ @override public string tostring() {  // todo auto-generated method stub  return "address[street=" + street +"]"; } }

  
student.java
 

package com.siyuan.castor;import java.util.arraylist;import java.util.date;import java.util.hashmap;import java.util.hashset;import java.util.list;import java.util.map;import java.util.set;public class student {		private int age;		private boolean male;		private string name;	private address address;		private date birthday;		private student girlfriend;		private set<student> friends = new hashset<student>();		private list<string> subjects = new arraylist<string>();		private map<string, string> teachers = new hashmap<string, string>(); 		public student() {			}		public student(string name) {		this.name = name;	}		/**	 * @return the age	 */	public int getage() {		return age;	}	/**	 * @param age the age to set	 */	public void setage(int age) {		this.age = age;	}	/**	 * @return the mail	 */	public boolean ismale() {		return male;	}	/**	 * @param mail the mail to set	 */	public void setmale(boolean male) {		this.male = male;	}	/**	 * @return the name	 */	public string getname() {		return name;	}	/**	 * @param name the name to set	 */	public void setname(string name) {		this.name = name;	}	/**	 * @return the address	 */	public address getaddress() {		return address;	}	/**	 * @param address the address to set	 */	public void setaddress(address address) {		this.address = address;	}		/**	 * @return the friends	 */	public set<student> getfriends() {		return friends;	}	/**	 * @param friends the friends to set	 */	public void setfriends(set<student> friends) {		this.friends = friends;	}		public void addfriend(student friend) {		friends.add(friend);	}	/**	 * @return the girlfriend	 */	public student getgirlfriend() {		return girlfriend;	}	/**	 * @param girlfriend the girlfriend to set	 */	public void setgirlfriend(student girlfriend) {		this.girlfriend = girlfriend;	}	/**	 * @return the subjects	 */	public list<string> getsubjects() {		return subjects;	}	public void addsubject(string subject) {		subjects.add(subject);	}	/**	 * @return the teachers	 */	public map<string, string> getteachers() {		return teachers;	}		/**	 * @return the teachers	 */	public void setteachers(map<string, string> teachers) {		this.teachers = teachers;	}	/**	 * @return the birthday	 */	public date getbirthday() {		return birthday;	}	/**	 * @param birthday the birthday to set	 */	public void setbirthday(date birthday) {		this.birthday = birthday;	}	/* (non-javadoc)	 * @see java.lang.object#tostring()	 */	@override	public string tostring() {		// todo auto-generated method stub		return "student[name=" + name + ",age=" + age + ",male=" + male + ",birthday=" + birthday +",\n"			+ "address=" + address + ",\n" 			+ "girlfriend=" + girlfriend + ",\n"			+ "friends=" + friends + ",\n" 			+ "subjects=" + subjects + ",\n" 			+ "teachers=" + teachers + "\n" 			+ "]";	}	}

 
castortest.java
 

package com.siyuan.castor.test;import java.io.stringreader;import java.io.stringwriter;import java.text.dateformat;import java.text.parseexception;import java.text.simpledateformat;import java.util.date;import java.util.hashmap;import java.util.hashset;import java.util.map;import java.util.set;import org.exolab.castor.xml.marshalexception;import org.exolab.castor.xml.marshaller;import org.exolab.castor.xml.unmarshaller;import org.exolab.castor.xml.validationexception;import com.siyuan.castor.address;import com.siyuan.castor.student;public class castortest {	/**	 * @param args	 * @throws validationexception 	 * @throws marshalexception 	 * @throws validationexception 	 * @throws marshalexception 	 */	public static void main(string[] args) throws marshalexception, validationexception{		student stusrc = new student();		stusrc.setage(22);		stusrc.setname("singleman");		stusrc.setmale(true);		address address = new address();		address.setstreet("renmin road");		stusrc.setaddress(address);		dateformat datefmt = new simpledateformat("yyyy-mm-dd");		try {			date birthday = datefmt.parse("1988-11-21");			stusrc.setbirthday(birthday);		} catch (parseexception e) {			e.printstacktrace();		}				student girl = new student();		girl.setage(20);		stusrc.setgirlfriend(girl);				set<student> students = new hashset<student>();		student stu1 = new student();		stu1.setage(21);		students.add(stu1);		student stu2 = new student();		stu2.setage(23);		students.add(stu2);				stusrc.addsubject("english");		stusrc.addsubject("math");		stusrc.addsubject("chinese");				map<string, string> teachers = new hashmap<string, string>();		teachers.put("english", "teacher a");		teachers.put("chinese", "teacher b");		stusrc.setteachers(teachers);				stringwriter result = new stringwriter();		<span style="color: #000000;">marshaller.marshal(stusrc, result);</span>		system.out.println(result);				  system.out.println("==========================================================");				<span style="color: #000000;">student studist = (student) unmarshaller.unmarshal(student.class, new stringreader(result.tostring()));</span>		system.out.println(studist);	}}

 
2.运行结果
 

<?xml version="1.0" encoding="utf-8"?><student male="true" age="22"><name>singleman</name><teachers xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:type="java:org.exolab.castor.mapping.mapitem"><key xsi:type="java:java.lang.string">english</key><value xsi:type="java:java.lang.string">teacher a</value></teachers><teachers xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:type="java:org.exolab.castor.mapping.mapitem"><key xsi:type="java:java.lang.string">chinese</key><value xsi:type="java:java.lang.string">teacher b</value></teachers><girl-friend male="false" age="20"/><subjects xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:type="java:java.lang.string">english</subjects><subjects xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:type="java:java.lang.string">math</subjects><subjects xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:type="java:java.lang.string">chinese</subjects><address><street>renmin road</street></address><birthday>1988-01-21t00:00:00.000+08:00</birthday></student>============================================================student[name=singleman,age=22,male=true,birthday=thu jan 21 00:00:00 cst 1988,address=address[street=renmin road],girlfriend=student[name=null,age=20,male=false,birthday=null,address=null,girlfriend=null,friends=[],subjects=[],teachers={}],friends=[],subjects=[english, math, chinese],teachers={english=teacher a, chinese=teacher b}]

  
3.参考资料
 
http://www.ibm.com/developerworks/cn/xml/x-bindcastor/