android中xml验证程序(xsd)
我有一个Android中API 10(2.3.3版本)的项目,我在用xsd文件验证xml时遇到了问题。 这是我的代码:android中xml验证程序(xsd),android,xml,xsd,validation,Android,Xml,Xsd,Validation,我有一个Android中API 10(2.3.3版本)的项目,我在用xsd文件验证xml时遇到了问题。 这是我的代码: 公共静态文档buildDoc(字符串xml,字符串xsd){ //将XML文档解析为DOM树 单据=空; 试试{ DocumentBuilderFactory parserFactory=DocumentBuilderFactory.newInstance(); setNamespaceAware(true); DocumentBuilder parserdb=parserFa
公共静态文档buildDoc(字符串xml,字符串xsd){
//将XML文档解析为DOM树
单据=空;
试试{
DocumentBuilderFactory parserFactory=DocumentBuilderFactory.newInstance();
setNamespaceAware(true);
DocumentBuilder parserdb=parserFactory.newDocumentBuilder();
doc=parserdb.parse(新的InputSource(新的StringReader(xml));
SchemaFactory工厂=SchemaFactory.newInstance(
W3C_XML_SCHEMA_NS_URI);//这里模拟器引发了一个异常
Source schemaFile=newstreamsource(新文件(xsd));
Schema=factory.newSchema(schemaFile);
Validator Validator=schema.newValidator();
//验证DOM树
validator.validate(新的DOMSource(doc));
System.out.println(“确认OK!”);
}捕获(SAXE异常){
//实例文档无效!
System.err.println(“验证错误!”);
e、 printStackTrace();
}捕获(ParserConfiguration异常e){
//TODO自动生成的捕捉块
System.err.println(“验证错误!”);
e、 printStackTrace();
}捕获(IllegalArgumentException e){
//TODO自动生成的捕捉块
System.err.println(“验证错误!”);
}捕获(IOE异常){
//TODO自动生成的捕捉块
System.err.println(“验证错误!”);
e、 printStackTrace();
}
退货单;
}
我的Eclipse模拟器引发异常:
E/AndroidRuntime(4770):由以下原因引起:java.lang.IllegalArgumentException:
在这方面:
SchemaFactory工厂=SchemaFactory.newInstance(
W3C_XML_SCHEMA_NS_URI)
为什么???因为您的平台不支持XML模式。如果您的问题不仅仅是为什么?还有更多的问题,我该如何做。。。那么以下可能是您可能喜欢的替代方案 我发现我无法让常规的xerces与Android一起工作,但我确实找到了适用于Android的xerces,我已经开始工作了。下面是设置的详细信息和一些示例代码。祝你好运:) 以下几点对我很有用:
download xerces-for-android
download silk svn (for windows users) from http://www.sliksvn.com/en/download
install silk svn (I did complete install)
Once the install is complete, you should have svn in your system path.
Test by typing "svn" from the command line.
I went to my desktop then downloaded the xerces project by:
svn checkout http://xerces-for-android.googlecode.com/svn/trunk/ xerces-for-android-read-only
You should then have a new folder on your desktop called xerces-for-android-read-only
使用上面的jar(最终我会将其制作成一个jar,直接复制到我的源代码中进行快速测试。如果您希望这样做,可以使用Ant()快速制作jar),我能够获得以下用于xml验证的内容:
import java.io.File;
import java.io.IOException;
import mf.javax.xml.transform.Source;
import mf.javax.xml.transform.stream.StreamSource;
import mf.javax.xml.validation.Schema;
import mf.javax.xml.validation.SchemaFactory;
import mf.javax.xml.validation.Validator;
import mf.org.apache.xerces.jaxp.validation.XMLSchemaFactory;
import org.xml.sax.SAXException;
/**
* A Utility to help with xml communication validation.
*/public class XmlUtil {
/**
* Validation method.
*
* @param xmlFilePath The xml file we are trying to validate.
* @param xmlSchemaFilePath The schema file we are using for the validation. This method assumes the schema file is valid.
* @return True if valid, false if not valid or bad parse or exception/error during parse.
*/
public static boolean validate(String xmlFilePath, String xmlSchemaFilePath) {
// Try the validation, we assume that if there are any issues with the validation
// process that the input is invalid.
try {
SchemaFactory factory = new XMLSchemaFactory();
Source schemaFile = new StreamSource(new File(xmlSchemaFilePath));
Source xmlSource = new StreamSource(new File(xmlFilePath));
Schema schema = factory.newSchema(schemaFile);
Validator validator = schema.newValidator();
validator.validate(xmlSource);
} catch (SAXException e) {
return false;
} catch (IOException e) {
return false;
} catch (Exception e) {
// Catches everything beyond: SAXException, and IOException.
e.printStackTrace();
return false;
} catch (Error e) {
// Needed this for debugging when I was having issues with my 1st set of code.
e.printStackTrace();
return false;
}
return true;
}
}
一些旁注:
为了创建文件,我制作了一个简单的文件实用程序来向文件写入字符串:
public static void createFileFromString(String fileText, String fileName) {
try {
File file = new File(fileName);
BufferedWriter output = new BufferedWriter(new FileWriter(file));
output.write(fileText);
output.close();
} catch ( IOException e ) {
e.printStackTrace();
}
}
我还需要写一个我可以访问的区域,所以我利用了:
String path = this.getActivity().getPackageManager().getPackageInfo(getPackageName(), 0).applicationInfo.dataDir;
有点老套,它很管用。我相信有一种更简洁的方法可以做到这一点,但我想我会分享我的成功,因为我没有找到任何好的例子。请参考此
String path = this.getActivity().getPackageManager().getPackageInfo(getPackageName(), 0).applicationInfo.dataDir;