在Java中解析XML文件时如何避免读取DTD?
我需要解析XML文档,它从以下几行开始:在Java中解析XML文件时如何避免读取DTD?,java,xml,xml-parsing,Java,Xml,Xml Parsing,我需要解析XML文档,它从以下几行开始: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE pdf2xml SYSTEM "pdf2xml.dtd"> <pdf2xml producer="poppler" version="0.22.0"> <page number="1" position="absolute" top="0" left="0" height="1263" width="892">
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pdf2xml SYSTEM "pdf2xml.dtd">
<pdf2xml producer="poppler" version="0.22.0">
<page number="1" position="absolute" top="0" left="0" height="1263" width="892">
<fontspec id="0" size="12" family="Times" color="#000000"/>
最后一次调用失败,出现以下异常:
Exception in thread "main" java.io.FileNotFoundException: D:\dev\ro-2014-04-13-01\pdf2xml.dtd
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:146)
at java.io.FileInputStream.<init>(FileInputStream.java:101)
at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:90)
at sun.net.www.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:188)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:613)
指定目录中实际上不存在文件pdf2xml.dtd
如何修改代码以便在没有pdf2xml.dtd的情况下解析文档?您需要使用实体解析器
当解析器达到条件-pdf2xml.dtd时,将调用实体解析器,它返回一个空的XML文档。您需要使用实体解析器
当解析器达到条件-pdf2xml.dtd时,将调用实体解析器,它返回一个空的XML文档。您需要实现一个EntityResolver。请参见此处:您需要实现EntityResolver。请看这里:
Exception in thread "main" java.io.FileNotFoundException: D:\dev\ro-2014-04-13-01\pdf2xml.dtd
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:146)
at java.io.FileInputStream.<init>(FileInputStream.java:101)
at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:90)
at sun.net.www.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:188)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:613)
myBuilder.setEntityResolver(new EntityResolver() {
@Override
public InputSource resolveEntity(String publicId, String systemId)
throws SAXException, IOException {
if (systemId.contains("pdf2xml.dtd")) {
return new InputSource(new ByteArrayInputStream("<?xml version='1.0' encoding='UTF-8'?>".getBytes()));
} else
return null;
}
});