java - 编码后 XML 未完全假脱机到文件中

Question

我正在尝试编码一个对象并替换一些无效的字符。在此过程中，不会生成完整的 xml。我在所有生成的文件中只能看到 1024 个字符。

package com.test;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.StringReader;
import java.util.Scanner;
import javax.xml.XMLConstants;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.stream.StreamResult;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import org.apache.log4j.Logger;
import org.xml.sax.SAXException;
import com.sun.xml.bind.marshaller.NamespacePrefixMapper;

public class MessageParserComponent {
    private static final Logger LOGGER = Logger.getLogger(MessageParserComponent.class);

           public File marshalIXml(final Object obj, final String xsdSchema,
        final String xmlFileName, final JAXBContext ctx) {
        File xml = new File(xmlFileName);

        try {
            xml.createNewFile();
            Marshaller marshaller = null;
            marshaller = ctx.createMarshaller();
            marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT,
                Boolean.TRUE);
            marshaller.setProperty(Marshaller.JAXB_SCHEMA_LOCATION,
                "http://www.db.com/tf " + xsdSchema);
            marshaller.setProperty("com.sun.xml.bind.namespacePrefixMapper",
                new NamespacePrefixMapper() {
                    @Override
                    public String getPreferredPrefix(String arg0, String arg1,
                        boolean arg2) {
                        return "tf";
                    }
                });

            marshaller.setProperty(Marshaller.JAXB_SCHEMA_LOCATION,
                "http://www.db.com/tf " + xsdSchema);
            marshaller.setSchema(getSchema(xsdSchema));
            marshaller.marshal(obj, new StreamResult(xml));
            xml = replaceInvalidChar('\u0007', '\n', xml);
            xml = replaceInvalidString("ns2", "xsi", xml);
        } catch (IOException e) {
            LOGGER.error(e);
        } catch (JAXBException e) {
            LOGGER.error(e);
        } catch (SAXException e) {
            LOGGER.error(e);
        }
        return xml;
    }

  private Schema getSchema(String xsdSchema) throws SAXException {
        SchemaFactory fact = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
        Schema schema = fact.newSchema(this.getClass().getClassLoader()
                                           .getResource(xsdSchema));
        return schema;
    }

   private static File replaceInvalidString(String Target, String Dest,
        File Source) throws IOException {
        String xml_string;
        xml_string = new Scanner(Source).useDelimiter("\\Z").next();
        xml_string = xml_string.replace(Target, Dest);
        FileOutputStream fi = new FileOutputStream(Source);
        fi.write(xml_string.getBytes());
        return Source;
    }

    public static File replaceInvalidChar(char Target, char Dest, File Source)
        throws IOException {
        String xml_string;
        xml_string = new Scanner(Source).useDelimiter("\\Z").next();
        xml_string = xml_string.replace(Target, Dest);
        FileOutputStream fi = new FileOutputStream(Source);
        fi.write(xml_string.getBytes());
        return Source;
    }
}

Is there a limit for string replacement?
Am I creating the file in a wrong way?

注意:

I'm storing file in UNIX log folder
I have java 6, JAXB 2.2

我们非常感谢任何形式的帮助。

Answer 1

只需检查您是否正确地使用 jaxb 注释对对象进行了注释。为什么要设置 Marshaller 属性？您想使用外部模式来编码您的对象吗？相反，为什么不让 jaxb 来处理所有这些事情(如果您的对象在同一工作区中可用)。

这个示例程序可能对您有帮助。 http://www.mkyong.com/java/jaxb-hello-world-example/

也检查一下..

JAXB Marshaller : StringWriter output has a truncated tag value截断标签值