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xml文件正确性验证类实现

 2010-10-18 09:38:44 来源:WEB开发网   
核心提示:很多时候我们的应用程序或者web程序需要用到xml文件进行配置,而最终的程序是需要给客户使用的,所以xml或者也需要客户来写,而客户来写的话的,就不能保证xml文件绝对的正确,于是我写了这个类,主要功能就是验证xml书写文件是否符合定义的xsd规范.package common.xml.validator;import

很多时候我们的应用程序或者web程序需要用到xml文件进行配置,而最终的程序是需要给客户使用的,所以xml或者也需要客户来写,而客户来写的话的,就不能保证xml文件绝对的正确,于是我写了这个类,主要功能就是验证xml书写文件是否符合定义的xsd规范.

package common.xml.validator;import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.io.StringReader;
import java.net.URL;import javax.xml.XMLConstants;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;import org.xml.sax.SAXException;/** *//**
* @author suyuan
*
*/
public class XmlSchemaValidator {  private boolean isValid = true;
  private String xmlErr = "";  public boolean isValid() {
    return isValid;
  }  public String getXmlErr() {
    return xmlErr;
  }  public XmlSchemaValidator()
  {
  }  
  public boolean ValidXmlDoc(String xml,URL schema)
  {
    StringReader reader = new StringReader(xml);
    return ValidXmlDoc(reader,schema);
  }  public boolean ValidXmlDoc(Reader xml,URL schema)
  {
    try {
      InputStream schemaStream = schema.openStream();
      Source xmlSource = new StreamSource(xml);
      Source schemaSource = new StreamSource(schemaStream);
      return ValidXmlDoc(xmlSource,schemaSource);    } catch (IOException e) {
      isValid = false;
      xmlErr = e.getMessage();
      return false;
    }
  }  public boolean ValidXmlDoc(String xml,File schema)
  {
    StringReader reader = new StringReader(xml);
    return ValidXmlDoc(reader,schema);
  }  public boolean ValidXmlDoc(Reader xml,File schema)
  {
    try {
      FileInputStream schemaStream = new FileInputStream(schema);
      Source xmlSource = new StreamSource(xml);
      Source schemaSource = new StreamSource(schemaStream);
      return ValidXmlDoc(xmlSource,schemaSource);    } catch (IOException e) {
      isValid = false;
      xmlErr = e.getMessage();
      return false;
    }
  }  public boolean ValidXmlDoc(Source xml,Source schemaSource)
  {
    try {       SchemaFactory schemafactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
      if(xml==null||xml.equals(""))
      {  
        return false;
      }
      Schema schema = schemafactory.newSchema(schemaSource);
      Validator valid = schema.newValidator();
      valid.validate(xml);
      return true;    } catch (SAXException e) {
      isValid = false;
      xmlErr = e.getMessage();
      return false;
    }
    catch (IOException e) {
      isValid = false;
      xmlErr = e.getMessage();
      return false;
    }
    catch (Exception e) {
      isValid = false;
      xmlErr = e.getMessage();
      return false;
    }
  }
}
 
 

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Tags:xml 文件 正确性

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