带有 JAXB 类的 GXT
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【中文标题】带有 JAXB 类的 GXT【英文标题】：GXT with JAXB classes 【发布时间】：2010-09-09 18:05:11 【问题描述】：我正在尝试创建一个用户界面，其中包含一个可编辑网格，其中包含来自 XSD 文件的数据。我已经使用 XJC 从 XSD 文件生成了所需的类。但我不知道如何使用 JAXB 生成类的方法将数据加载到网格中。谁能告诉我该怎么做？我已经使用 XSD 文件的 XML 文档实现了 Sencha 网站 (http://www.sencha.com/examples/pages/grid/xml.html) 的简单 XML 网格示例的代码。但是，我遇到了无法从 XML 文件加载内部子节点数据的问题。谁能帮我解决这两个问题？谢谢。
编辑：以下是我的网格代码。
public class XMLToGridex extends LayoutContainer
//@Override
protected void onRender(Element parent, int index)
super.onRender(parent, index);
setLayout(new FlowLayout(10));
List<ColumnConfig> columns = new ArrayList<ColumnConfig>();
columns.add(new ColumnConfig("name", "Name", 100));
columns.add(new ColumnConfig("frameworkFrequencyMultiplier", "FrameWorkFrequencyMultiplier", 300));
columns.add(new ColumnConfig("additional", "Additional", 100));
// create the column model
ColumnModel cm = new ColumnModel(columns);
// defines the xml structure
ModelType type = new ModelType();
type.setRoot("module");
type.setRecordName("emsElement");
type.addField("name");
type.addField("frameworkFrequencyMultiplier");
// type.addField("convertItem");
// type.setRoot("convertItem");
// type.setRecordName("source");
//type.addField("additional");
//type.addField("converter");
//type.addField("converter");
//type.setRecordName(")
// type.addField("convertItem");
// use a http proxy to get the data
RequestBuilder builder = new RequestBuilder(RequestBuilder.GET,
GWT.getHostPageBaseURL() + "module.xml");
HttpProxy<String> proxy = new HttpProxy<String>(builder);
// need a loader, proxy, and reader
XmlLoadResultReader<ListLoadResult<ModelData>> reader = new XmlLoadResultReader<ListLoadResult<ModelData>>(
type);
final BaseListLoader<ListLoadResult<ModelData>> loader = new BaseListLoader<ListLoadResult<ModelData>>(
proxy, reader);
ListStore<ModelData> store = new ListStore<ModelData>(loader);
final Grid<ModelData> grid = new Grid<ModelData>(store, cm);
grid.setBorders(true);
grid.setLoadMask(true);
grid.getView().setEmptyText("Please hit the load button.");
//grid.setAutoExpandColumn("Name");
// grid.setAutoExpandColumn("");
//grid.setAutoExpandColumn("ConvertItem");
ContentPanel panel = new ContentPanel();
panel.setFrame(true);
panel.setCollapsible(true);
panel.setAnimCollapse(false);
panel.setButtonAlign(HorizontalAlignment.CENTER);
//panel.setIcon(Resources.ICONS.table());
panel.setHeading("XML Table Demo");
panel.setLayout(new FitLayout());
panel.add(grid);
panel.setSize(575, 350);
// add buttons
Button load = new Button("Load XML", new SelectionListener<ButtonEvent>()
public void componentSelected(ButtonEvent ce)
loader.load();
);
panel.addButton(load);
add(panel);
Edit2：我也发布 XML 文档以获得更好的想法。
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<module>
<emsElement>
<name>c1</name>
<frameworkFrequencyMultiplier>1</frameworkFrequencyMultiplier>
<convertItem>
<source user="test" url="https://192.168.103.153:8443/mi/xmlInterfaceRequest.do" passwd="837103af8990d948">
<additional>method=post</additional>
<useEncryptPasswd>true</useEncryptPasswd>
<trustStoreLocation>$NH_HOME/custom/imframework/config/trustkeystore</trustStoreLocation>
<trustStorePassword>changeit</trustStorePassword>
</source>
<processor deltaed="true" name="camiant" additional="requestName=All">
<serverName>192.168.103.130</serverName>
</processor>
<converter name="dump">
<additional>timestamp=true</additional>
<location url="$NH_HOME/modules/imframework/fileStagingArea/dump"/>
</converter>
<converter name="element">
<location url="$NH_HOME/modules/imframework/fileStagingArea/elementData"/>
</converter>
</convertItem>
</emsElement>
<emsElement>
<name>n-nj</name>
<frameworkFrequencyMultiplier>1</frameworkFrequencyMultiplier>
<convertItem>
<source user="ubuntu" url="sftp://192.168.150.133/home/ubuntu/NSN/NJ" passwd="d5ee45fa2386d5f8">
<additional>strictHostKeyChecking=no</additional>
<namePatterm>**/*</namePatterm>
<recureMode>true</recureMode>
<useEncryptPasswd>true</useEncryptPasswd>
</source>
<processor deltaed="true" name="nsn">
<serverName>192.168.150.133</serverName>
<config>configA=$NH_HOME/custom/imframework/config/NSN-SimulatorConfigA.xml</config>
</processor>
<converter name="dump">
<location url="$NH_HOME/modules/imframework/fileStagingArea/dump"/>
</converter>
<converter name="element">
<location url="$NH_HOME/modules/imframework/fileStagingArea/elementData"/>
</converter>
</convertItem>
</emsElement>
<emsElement>
<name>n-tx</name>
<frameworkFrequencyMultiplier>1</frameworkFrequencyMultiplier>
<convertItem>
<source user="ubuntu" url="sftp://192.168.150.133/home/ubuntu/NSN/TX" passwd="d5ee45fa2386d5f8">
<additional>strictHostKeyChecking=no</additional>
<namePatterm>**/*</namePatterm>
<recureMode>true</recureMode>
<useEncryptPasswd>true</useEncryptPasswd>
</source>
<processor deltaed="true" name="nsn">
<serverName>192.168.150.133</serverName>
<config>configA=$NH_HOME/custom/imframework/config/NSN-SimulatorConfigA.xml</config>
</processor>
<converter name="dump">
<location url="$NH_HOME/modules/imframework/fileStagingArea/dump"/>
</converter>
<converter name="element">
<location url="$NH_HOME/modules/imframework/fileStagingArea/elementData"/>
</converter>
<converter name="csv">
<additional>perDayperDirectory=true,PDSN=starent</additional>
</converter>
</convertItem>
</emsElement>
<emsElement>
<name>k1</name>
<frameworkFrequencyMultiplier>1</frameworkFrequencyMultiplier>
<convertItem>
<source user="ubuntu" url="sftp://192.168.150.128/home/ubuntu/fileStagingArea" passwd="d5ee45fa2386d5f8">
<additional>strictHostKeyChecking=no</additional>
<namePatterm>**/*</namePatterm>
<recureMode>true</recureMode>
<useEncryptPasswd>true</useEncryptPasswd>
</source>
<processor deltaed="true" name="kodiak" additional="processBy=KodiakFileDate">
<serverName>192.168</serverName>
<config>$NH_HOME/custom/imframework/config/KODIAK-SimulatorConfig.xml</config>
</processor>
<converter name="dump">
<location url="$NH_HOME/modules/imframework/fileStagingArea/dump"/>
</converter>
<converter name="element">
<location url="$NH_HOME/modules/imframework/fileStagingArea/elementData"/>
</converter>
</convertItem>
</emsElement>
<emsElement>
<name>a1</name>
<frameworkFrequencyMultiplier>1</frameworkFrequencyMultiplier>
<convertItem>
<source user="ubuntu" url="sftp://192.168.150.133/home/ubuntu/ALU/NJALUSample" passwd="d5ee45fa2386d5f8">
<additional>strictHostKeyChecking=no</additional>
<namePatterm>**/*</namePatterm>
<recureMode>true</recureMode>
<useEncryptPasswd>true</useEncryptPasswd>
</source>
<processor deltaed="true" name="alu">
<serverName>192.168.150.133</serverName>
<config>configA=$NH_HOME/custom/imframework/config/ALU-SimulatorConfigA.xml,configB=$NH_HOME/custom/imframework/config/ALU-SimulatorConfigB.xml,configC=$NH_HOME/custom/imframework/config/ALU-SimulatorConfigC.xml</config>
</processor>
<converter name="dump">
<location url="$NH_HOME/modules/imframework/fileStagingArea/dump"/>
</converter>
<converter name="element">
<location url="$NH_HOME/modules/imframework/fileStagingArea/elementData"/>
</converter>
</convertItem>
</emsElement></module>
【问题讨论】：
您能否发布您遇到的错误以及您遇到问题的代码的 sn-p？ 我的代码没有任何错误。数据正在加载到网格中。但是xml文档的内部子节点数据没有被加载。 我想我只是不明白这个问题。您无法访问 JAXB 生成的类中的 getter，还是未编组的 JAXB 对象树中没有数据？ 我还没有在实际代码中使用 JAXB。我想先用最简单的代码加载并查看网格中的 XML 文档。 【参考方案1】：您将编写的 JAXB 代码如下所示：
JAXBContext jc = JAXBContext.newInstance("your.model.package");
Unmarshaller unmarshaller = jc.createUnmarshaller();
Module module = (Module) unmarshaller.unmarshal(xml);
【讨论】：
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