使用Betwixt将javaBean生成xml
壤驷心思
The Betwixt library provides an XML introspection mechanism for mapping beans to XML in a flexible way. It is implemented using an XMLIntrospector and XMLBeanInfo classes which are similar to the standard Introspector and BeanInfo from the Java Beans specification. （提供XML与JAVABEAN间的相互映射。）
将javaBean生成Xml的步骤：
1.
要产生的 目标xml:
<?xml version='1.0' ?>
<note>
<to>fdfdf</to>
<from name="frof"></from>
<heading name="tesdd"></heading>
<body name="fdfddf"></body>
</note>
2．而原始javaBean的信息为：
package
betwixt;
public
class
NoteBean {
private
String
toWho
;
private
String
fromWho
;
private
String
title
;
private
String
note
;
public
NoteBean() {
}
public
String getFromWho() {
return
fromWho
;
}
public
void
setFromWho(String fromWho) {
this
.
fromWho
= fromWho;
}
public
String getNote() {
return
note
;
}
public
void
setNote(String note) {
this
.
note
= note;
}
public
String getTitle() {
return
title
;
}
public
void
setTitle(String title) {
this
.
title
= title;
}
public
String getToWho() {
return
toWho
;
}
public
void
setToWho(String toWho) {
this
.
toWho
= toWho;
}
}
2.
撰写
.betwixt
，文件名需和
bean
相同，故为
NoteBean.
betwixt
<info primitiveTypes="element">
<element name="note">
<element name="to" property="toWho" />
<element name="from">
<attribute name="name" property="fromWho"/>
</element>
<element name="heading">
<attribute name="name" property="title"/>
</element>
<element name="body">
<attribute name="name" property="note"/>
</element>
<!-- <addDefaults />-->
</element>
</info>
注意：
a.
<element name="to" property="toWho" />
表示
name
要显示的
xml
中的元素名
,
property
表示对应
javaBean
中一个属性名，其值显示在
<></>
里面。
b. <element name="from">
<attribute name="name" property="fromWho"/>
</element>
中间加：
<attribute name="name" property="fromWho"/>
表示会在在结点上加一个属性为
name
，其值显示在里面。
c.
<addDefaults />
加上默认的结点，是以
javaBean
中的属性来显示。
3.
写测试代码：
import
java.io.StringWriter;
import
org.apache.commons.betwixt.io.BeanWriter;
public
class
WriteExampleApp {
/**
*
Create
an
example
bean
and
then
convert
it
to
xml.
*/
public
static
final
void
main(String [] args)
throws
Exception {
// Start by preparing the writer
// We'll write to a string
StringWriter outputWriter =
new
StringWriter();
// Betwixt just writes out the bean as a fragment
// So if we want well-formed xml, we need to add the prolog
outputWriter.write(
"<?xml version='1.0' ?>"
);
// Create a BeanWriter which writes to our prepared stream
BeanWriter beanWriter =
new
BeanWriter(outputWriter);
// Configure betwixt
// For more details see java docs or later in the main documentation
beanWriter.getXMLIntrospector().getConfiguration().setAttributesForPrimitives (
false
);
beanWriter.getBindingConfiguration().setMapIDs(
false
);
beanWriter.enablePrettyPrint();
//
启用缩进格式
.
beanWriter.setEndTagForEmptyElement(
true
);
// beanWriter.setIndent("/t");
beanWriter.writeXmlDeclaration(
""
);
NoteBean test=
new
NoteBean();
test.setToWho(
"fdfdf"
);
test.setFromWho(
"frof"
);
test.setTitle(
"tesdd"
);
test.setNote(
"fdfddf"
);
// If the base element is not passed in, Betwixt will guess
// But let's write example bean as base element 'person'
beanWriter.write(
"note"
, test);
// Write to System.out
// (We could have used the empty constructor for BeanWriter
// but this way is more instructive)
System.
out
.println(outputWriter.toString());
// Betwixt writes fragments not documents so does not automatically close
// writers or streams.
// This example will do no more writing so close the writer now.
outputWriter.close();
}
}
轉載來自：http://blog.csdn.net/pengchua/article/details/1955405
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