java - 哪种语言最容易和最快地处理 XML 内容？

Question

我们的开发人员了解这些语言 - Ruby、Python、.Net 或 Java。我们正在开发一个主要处理 XML 文档的应用程序。大部分工作是将预定义的 XML 文件转换为数据库表，通过数据库提供 XML 文档之间的映射，从数据库创建报告等。哪种语言最容易和最快使用？ (这是一个网络应用程序)

Answer 1

为此的动态语言规则。为什么？映射易于编码和更改。您不必重新编译和重建。

确实，只要稍微聪明一点，您就可以将“XML XPATH to a Tag -> DB table-field”映射作为主应用程序导入的不相交的 Python 代码块。

Python 代码块是您的配置文件。它不是描述配置的 .ini 文件或 .properties 文件。它是配置。

为此，我们使用 Python、xml.etree 和 SQLAlchemy(将 SQL 从您的程序中分离出来)，因为我们只需很少的努力和很大的灵 active 即可启动和运行。

---

source.py

"""A particular XML parser.  Formats change, so sometimes this changes, too."""

import xml.etree.ElementTree as xml

class SSXML_Source( object ):
    ns0= "urn:schemas-microsoft-com:office:spreadsheet"
    ns1= "urn:schemas-microsoft-com:office:excel"
    def __init__( self, aFileName, *sheets ):
        """Initialize a XML source.
        XXX - Create better sheet filtering here, in the constructor.
        @param aFileName: the file name.
        """
        super( SSXML_Source, self ).__init__( aFileName )
        self.log= logging.getLogger( "source.PCIX_XLS" )
        self.dom= etree.parse( aFileName ).getroot()
    def sheets( self ):
        for wb in self.dom.getiterator("{%s}Workbook" % ( self.ns0, ) ):
            for ws in wb.getiterator( "{%s}Worksheet" % ( self.ns0, ) ):
                yield ws
    def rows( self ):
        for s in self.sheets():
            print s.attrib["{%s}Name" % ( self.ns0, ) ]
            for t in s.getiterator( "{%s}Table" % ( self.ns0, ) ):
                for r in t.getiterator( "{%s}Row" % ( self.ns0, ) ):
                    # The XML may not be really useful.
                    # In some cases, you may have to convert to something useful
                    yield r

model.py

"""This is your target object.  
It's part of the problem domain; it rarely changes.
"""
class MyTargetObject( object ):
    def __init__( self ):
        self.someAttr= ""
        self.anotherAttr= ""
        self.this= 0
        self.that= 3.14159
    def aMethod( self ):
        """etc."""
        pass

builder_today.py众多映射配置之一

"""One of many builders.  This changes all the time to fit
specific needs and situations.  The goal is to keep this
short and to-the-point so that it has the mapping and nothing
but the mapping.
"""

import model

class MyTargetBuilder( object ):
    def makeFromXML( self, element ):
        result= model.MyTargetObject()
        result.someAttr= element.findtext( "Some" )
        result.anotherAttr= element.findtext( "Another" )
        result.this= int( element.findtext( "This" ) )
        result.that= float( element.findtext( "that" ) )
        return result

loader.py

"""An application that maps from XML to the domain object
using a configurable "builder".
"""
import model
import source
import builder_1
import builder_2
import builder_today

# Configure this:  pick a builder is appropriate for the data:
b= builder_today.MyTargetBuilder()

s= source.SSXML_Source( sys.argv[1] )
for r in s.rows():
    data= b.makeFromXML( r )
    # ... persist data with a DB save or file write

---

要进行更改，您可以更正构建器或创建新构建器。您调整加载器源以确定将使用哪个构建器。您可以毫不费力地将 builder 的选择设为命令行参数。动态语言中的动态导入对我来说似乎有点矫枉过正，但它们很方便。