Castor实现XML与Java的互转

Castor是一个开源的XML数据绑定java组件工具，在XML数据交换方面很有用。

http://www.castor.org/

刚开始研究，找了些文档看看：
http://www.ibm.com/developerworks/cn/xml/x-bindcastor/
http://www.ibm.com/developerworks/cn/xml/x-xjavacastor1/
http://www.ibm.com/developerworks/cn/xml/x-xjavacastor2/
http://www.ibm.com/developerworks/cn/xml/x-pracdb1.html

http://www.infoq.com/cn/articles/event-streaming-with-smooks

下面写个简单例子，测试下Castor：

bean

test类：

packageex1;

importorg.exolab.castor.xml.Marshaller;
importorg.exolab.castor.xml.Unmarshaller;

importjava.io.FileReader;
importjava.io.FileWriter;
importjava.util.Map;

public classMarshalTester {

public static voidmain(String[] args) {
testMarshaller();
testUnMarshaller();
}

/**
* java->XML
*/
public static voidtestMarshaller() {
try{
Foo f = newFoo( "foo");
f.getAdds().add( "zhengzhou");
f.getAdds().add( "xian");
f.getMap().put( "a","aaa");
f.getMap().put( "b","bbb");
FileWriter writer = newFileWriter( "foo.xml");
Marshaller marshaller = newMarshaller(writer);
marshaller.setEncoding( "GBK");
marshaller.marshal(f);
} catch(Exception e) {
e.printStackTrace(System.err);
}
}

/**
* XML->java
*/
public static voidtestUnMarshaller() {
try{
FileReader reader = newFileReader( "D:teststutestcastorfoo.xml");
Foo foo = (Foo) Unmarshaller.unmarshal(Foo. class,reader);
System.out.println( "Name: "+ foo.getName());
System.out.println( "Birthday: "+ foo.getBirthday());
for(Object s : foo.getAdds()) {
System.out.println( "Add: "+ s.toString());
}

for(Object o : foo.getMap().entrySet()) {
Map.Entry e = (Map.Entry) o;
System.out.println( "Map: "+ e.getKey() + "--"+ e.getValue());
}

} catch(Exception e) {
System.err.println(e.getMessage());
e.printStackTrace(System.err);
}
}
}

生成的xml文件如下：

foo.xml

<?xml version= "1.0"encoding= "GBK"?>
<foo>
<name>foo</name>
<birthday>2010-04-30T18:01:59.375+08:00</birthday>
<map xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance" xmlns:java="http://java.sun.com"
xsi:type="java:org.exolab.castor.mapping.MapItem">
<key xsi:type="java:java.lang.String">a</key>
<value xsi:type="java:java.lang.String">aaa</value>
</map>
<map xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:java="http://java.sun.com"
xsi:type="java:org.exolab.castor.mapping.MapItem">
<key xsi:type="java:java.lang.String">b</key>
<value xsi:type="java:java.lang.String">bbb</value>
</map>
<adds xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:java="http://java.sun.com"
xsi:type="java:java.lang.String">zhengzhou
</adds>
<adds xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:java="http://java.sun.com"
xsi:type="java:java.lang.String">xian
</adds>
</foo>

运行反解组测试方法：

log4j:WARN No appenders could be found forlogger (org.castor.core.util.AbstractProperties).
log4j:WARN Please initialize the log4j system properly.
Name: foo
Birthday: Fri Apr 30 18:01:59 CST 2010
Add: zhengzhou
Add: xian
Map: a--aaa
Map: b--bbb

Process finished with exit code 0

红色部分是有效输出！

虽然格式还不够美观，但已经感受到了Castor的强大功能！

这个例子不够完美，xml还没格式化，输出了一些类参数信息，显得不够专业。以后再研究研究。