怎么用jaxb技术将xml转成javabean
1个回答
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Java代码
import java.util.ArrayList;
import java.util.List;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;
@XmlRootElement(name="module")
public class Module extends Metadata{
@XmlAttribute(name="name")
public String name;
@XmlAttribute(name="template")
public String template;
@XmlElement
public Resources resources;
@XmlElement
public HeaderItems headerItems;
@XmlElement
public Properties properties;
@XmlElement
public BodyItems bodyItems;
@XmlTransient
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@XmlTransient
public String getTemplate() {
return template;
}
public void setTemplate(String template) {
this.template = template;
}
@XmlTransient
public Resources getResources() {
return resources;
}
public void setResources(Resources resources) {
this.resources = resources;
}
@XmlTransient
public HeaderItems getHeaderItems() {
return headerItems;
}
public void setHeaderItems(HeaderItems headerItems) {
this.headerItems = headerItems;
}
@XmlTransient
public Properties getProperties() {
return properties;
}
public void setProperties(Properties properties) {
this.properties = properties;
}
@XmlTransient
public BodyItems getBodyItems() {
return bodyItems;
}
public void setBodyItems(BodyItems bodyItems) {
this.bodyItems = bodyItems;
}
}
Moduel对象其中一个对象属性:
Java代码
import java.util.List;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlTransient;
public class HeaderItems extends Metadata {
@XmlElement(name="field")
private List<Field> fields;
@XmlTransient
public List<Field> getFields() {
return fields;
}
public void setFields(List<Field> fields) {
this.fields = fields;
for (int i=0; i<fields.size(); i++)
fields.get(i).setHeaderItem(true);
}
public void clear() {
fields.clear();
}
}
Java代码
package com.morningstar.wfe.metadata.node;
import java.util.List;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlTransient;
public class Map extends Datasource {
@XmlAttribute(name="name")
public String name;
@XmlAttribute(name="type")
public String type;
@XmlAttribute(name="url")
public String url;
@XmlElement
public Entries entries;
public void setName(String name) {
this.name = name;
}
public void setType(String type) {
this.type = type;
}
public void setEntries(Entries entries) {
this.entries = entries;
}
@XmlTransient
public String getName() {
return name;
}
@XmlTransient
public String getType() {
return type;
}
@XmlTransient
public Entries getEntries() {
return this.entries;
}
@XmlTransient
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public int size() {
if (entries == null) return 0;
return entries.size();
}
public Entry get(int index) {
if (entries == null) return null;
return entries.get(index);
}
public List<Entry> getEntriesList() {
return entries.getEntryList();
}
}
最后XML闪亮登场:
Java代码
<?xml version="1.0" encoding="UTF-8"?>
<module name='showcase' template='showcase.ftl'>
<resources>
<map name='css' type='static'>
<entries>
<entry label="text_a1" value="text_a1"></entry>
<entry label="text_a2" value="text_a2"></entry>
<entry label="text_a3" value="text_a3"></entry>
<entry label="text_c1" value="text_c1"></entry>
<entry label="text_c2" value="text_c2"></entry>
</entries>
</map>
<map name='status' type='ws' url="xxxx">
</map>
<map name='author' type='file' url="xxxx">
</map>
</resources>
<headerItems>
<field name='active1' type='checkbox' datasource='css'
multiple='false' />
<field name='title1' type='text' format="string" required="true"/>
<field name='radio11' type='radio' datasource='css'/>
<field name='url11' type='url' format="string"/>
<field name='dropdownlist111' type='select' datasource='css' multiple="true" height="80" width="100"/>
<field name='title22' type='textarea' width="200" height="100" spellCheck="true" format="string" required="true"/>
</headerItems>
<properties>
<field name='active12' type='checkbox' datasource='status'
multiple='false' />
<field name='title12' type='date' format="int" />
<field name='email11' type='email' visible="true" />
</properties>
<bodyItems>
<field label="Name" name="name" type="text" visible="false"
editable="false"></field>
<field name="readings_list" type="datatable" action="insert,remove">
<columns>
<field label="Title" name="rSource" type="text" visible="true" width="30"/>
<field label="URL" name="rURL" type="text" visible="true" width="40"/>
<field label="Date" name="rDate" type="text" visible="true" width="50"/>
<field label="Source" name="rSource" type="text" visible="true" width="60"/>
</columns>
</field>
</bodyItems>
</module>
Metadata是一个抽象类,描述了些 ID NAME VALUE基本属性 没什么特别的
关于XML转java对象的操作:
Java代码
public static Module parse(String metadata) throws MetadataParserException {
Module module = null;
try {
JAXBContext jaxbContext = JAXBContext.newInstance(Module.class);
Unmarshaller um = jaxbContext.createUnmarshaller();
module = (Module)um.unmarshal(new ByteArrayInputStream(metadata.getBytes()));
} catch (JAXBException e) {
log.warn("JAXB castor failed to convert the metadata to module instance by {}",e.getMessage());
throw new MetadataParserException();
}
return module;
}
这样的话传进XML的字符串,就可以解析出这个JAVA对象。完全不用写任何过多的代码。岂不爽哉?!!!!
附一个java bean <=> xml 的unmi同志原创文档,主要是比较Jaxb和castor。
import java.util.ArrayList;
import java.util.List;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;
@XmlRootElement(name="module")
public class Module extends Metadata{
@XmlAttribute(name="name")
public String name;
@XmlAttribute(name="template")
public String template;
@XmlElement
public Resources resources;
@XmlElement
public HeaderItems headerItems;
@XmlElement
public Properties properties;
@XmlElement
public BodyItems bodyItems;
@XmlTransient
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@XmlTransient
public String getTemplate() {
return template;
}
public void setTemplate(String template) {
this.template = template;
}
@XmlTransient
public Resources getResources() {
return resources;
}
public void setResources(Resources resources) {
this.resources = resources;
}
@XmlTransient
public HeaderItems getHeaderItems() {
return headerItems;
}
public void setHeaderItems(HeaderItems headerItems) {
this.headerItems = headerItems;
}
@XmlTransient
public Properties getProperties() {
return properties;
}
public void setProperties(Properties properties) {
this.properties = properties;
}
@XmlTransient
public BodyItems getBodyItems() {
return bodyItems;
}
public void setBodyItems(BodyItems bodyItems) {
this.bodyItems = bodyItems;
}
}
Moduel对象其中一个对象属性:
Java代码
import java.util.List;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlTransient;
public class HeaderItems extends Metadata {
@XmlElement(name="field")
private List<Field> fields;
@XmlTransient
public List<Field> getFields() {
return fields;
}
public void setFields(List<Field> fields) {
this.fields = fields;
for (int i=0; i<fields.size(); i++)
fields.get(i).setHeaderItem(true);
}
public void clear() {
fields.clear();
}
}
Java代码
package com.morningstar.wfe.metadata.node;
import java.util.List;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlTransient;
public class Map extends Datasource {
@XmlAttribute(name="name")
public String name;
@XmlAttribute(name="type")
public String type;
@XmlAttribute(name="url")
public String url;
@XmlElement
public Entries entries;
public void setName(String name) {
this.name = name;
}
public void setType(String type) {
this.type = type;
}
public void setEntries(Entries entries) {
this.entries = entries;
}
@XmlTransient
public String getName() {
return name;
}
@XmlTransient
public String getType() {
return type;
}
@XmlTransient
public Entries getEntries() {
return this.entries;
}
@XmlTransient
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public int size() {
if (entries == null) return 0;
return entries.size();
}
public Entry get(int index) {
if (entries == null) return null;
return entries.get(index);
}
public List<Entry> getEntriesList() {
return entries.getEntryList();
}
}
最后XML闪亮登场:
Java代码
<?xml version="1.0" encoding="UTF-8"?>
<module name='showcase' template='showcase.ftl'>
<resources>
<map name='css' type='static'>
<entries>
<entry label="text_a1" value="text_a1"></entry>
<entry label="text_a2" value="text_a2"></entry>
<entry label="text_a3" value="text_a3"></entry>
<entry label="text_c1" value="text_c1"></entry>
<entry label="text_c2" value="text_c2"></entry>
</entries>
</map>
<map name='status' type='ws' url="xxxx">
</map>
<map name='author' type='file' url="xxxx">
</map>
</resources>
<headerItems>
<field name='active1' type='checkbox' datasource='css'
multiple='false' />
<field name='title1' type='text' format="string" required="true"/>
<field name='radio11' type='radio' datasource='css'/>
<field name='url11' type='url' format="string"/>
<field name='dropdownlist111' type='select' datasource='css' multiple="true" height="80" width="100"/>
<field name='title22' type='textarea' width="200" height="100" spellCheck="true" format="string" required="true"/>
</headerItems>
<properties>
<field name='active12' type='checkbox' datasource='status'
multiple='false' />
<field name='title12' type='date' format="int" />
<field name='email11' type='email' visible="true" />
</properties>
<bodyItems>
<field label="Name" name="name" type="text" visible="false"
editable="false"></field>
<field name="readings_list" type="datatable" action="insert,remove">
<columns>
<field label="Title" name="rSource" type="text" visible="true" width="30"/>
<field label="URL" name="rURL" type="text" visible="true" width="40"/>
<field label="Date" name="rDate" type="text" visible="true" width="50"/>
<field label="Source" name="rSource" type="text" visible="true" width="60"/>
</columns>
</field>
</bodyItems>
</module>
Metadata是一个抽象类,描述了些 ID NAME VALUE基本属性 没什么特别的
关于XML转java对象的操作:
Java代码
public static Module parse(String metadata) throws MetadataParserException {
Module module = null;
try {
JAXBContext jaxbContext = JAXBContext.newInstance(Module.class);
Unmarshaller um = jaxbContext.createUnmarshaller();
module = (Module)um.unmarshal(new ByteArrayInputStream(metadata.getBytes()));
} catch (JAXBException e) {
log.warn("JAXB castor failed to convert the metadata to module instance by {}",e.getMessage());
throw new MetadataParserException();
}
return module;
}
这样的话传进XML的字符串,就可以解析出这个JAVA对象。完全不用写任何过多的代码。岂不爽哉?!!!!
附一个java bean <=> xml 的unmi同志原创文档,主要是比较Jaxb和castor。
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