使用Betwixt将javaBean生成xml
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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。）?http://commons.apache.org/betwixt/apidocs/index.html 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;?publicclass NoteBean {???? private String toWho;???? private String fromWho;???? private String title;???? private String note;???? public NoteBean() {??? }???? public String getFromWho() {?????? returnfromWho;??? }???? publicvoid setFromWho(String fromWho) {?????? this.fromWho = fromWho;??? }???? public String getNote() {?????? returnnote;??? }???? publicvoid setNote(String note) {?????? this.note = note;??? }???? public String getTitle() {?????? returntitle;??? }???? publicvoid setTitle(String title) {?????? this.title = title;??? }???? public String getToWho() {?????? returntoWho;??? }???? publicvoid 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;publicclass WriteExampleApp {???? /**???? *Createanexamplebeanandthenconvertittoxml.???? */??? publicstaticfinalvoid 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();??? }}<!--EndFragment-->
