運行報這個錯是為什么？
[Fatal Error] books.xml:1:42: The encoding declaration is required in the text declaration.
org.xml.sax.SAXParseException: The encoding declaration is required in the text declaration.
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:249)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:284)
at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:180)
at com.imooc.DomTest.main(DomTest.java:28)
2016-09-14
books.xml:1:42:編碼聲明文本中需要聲明。
org.xml.sax。:拋出SAXParseException異常編碼聲明需要在文本中聲明。