matlab的xml工具箱

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2024年7月30日发(作者：)

Matlab自带了xmlread，xmlwrite等三个与xml相关的函 数，但是使用起来仍

然不方便。

在Matlab主页上有个xml_io_tools的工具，很不错，简单易用，一个小时基本

就可以掌握了。

简单记录一下笔记：

1、ine = 'Xerces'

Same operation using Apache Xerces XML engine. But root element name

was passed as variable

2、"Item" flag in "xml_write" true false

保存结构

true 自动加入

false 保持原样

read时结果会保持一致的

存在一个潜在的问题，这是由系统决定，注意避免即可

3、"em" flag in "xml_write" true false

保持cell

与2有相同做法

注意cellitem可以控制cell/struct结构储存

4、"s" flag in "xml_read"

false 读出结构体

true 将结构体进行混合

5、"me" flag in "xml_write"

控制自动加入的'item'

6、"me" flag in "xml_read"

读取自动控制

6、"2Num" flag in xml_read

"2Num = false" to keep all the fields in string format

机构不肯能完全保证一致：WARNING

Notice that both settings will produce the same output for "num1" and

"num2" and there is no way to reproduce the original "MyTree" structure.

7、Use ATTRIBUTE and CONTENT

MyTree=[];

er = 13;

T = 'Hello World';

= 2;

xml_write('', MyTree);

type('')

8、Use Comments

MyTree=[];

T = 'This is a comment';

er = 13;

T = 'Hello World';

xml_write('', MyTree);

type('')

9、Comments in XML top level (method #1) This method uses cell array

MyTree=[];

er = 13;

ng = 'Hello World';

xml_write('', MyTree, {'MyTree', [], 'This is a global comment'});

type('')

10、Comments in XML top level (method #2)

"ly = false",

MyTree=[];

T = 'This is a global comment';

er = 13;

ng = 'Hello World';

Pref=[]; ly = false;

xml_write('', MyTree, [], Pref);

type('')

11、Write XML files with PROCESSING_INSTRUCTIONs

MyTree=[];

SING_INSTRUCTION = 'xml-stylesheet type="a" href="foo"';

er = 13;

ng = 'Hello World';

xml_write('', MyTree);

type('')

12、Write XML files with CDATA Sections

Same operation using Apache Xerces XML engine produces correct results

13、Write XML files with special characters in TAG names

genvarname('My-Number')

Num_0xF6

Also two of the characters '-' and ':' can be encoded by a special strings:

'_DASH_' and '_COLON_' respectively

0x3A=：

名域必须先被加上

14、Read only the Root Element (default)

15、"tr" flag in "xml_read"

16、Using "ec" flag in "xml_read"

17、"ly" flag in "xml_read"As it was shown in previous examples

RootOnly parameter can be used to capture global (top level) special nodes

(like COMMENTs and PROCESSING_INSTRUCTIONs) which are ignored by default

18、"ly" flag in "xml_write" gives wrong output file

19、"els" flag in "xml_read"

Use Default ("els = infinity") setting

20、Create DOM object based on a Struct using "xml_write"

Create Struct tree

MyTree=[];

er = 13;

ng = 'Hello World';

Convert Struct to DOM object using xml_write

DOM = xml_write([], MyTree);

xmlwrite('', DOM); % Save DOM object using MATLAB function

type('')

Convert DOM object to Struct using "xml_read"DOM =

xmlread(''); % Read DOM object using MATLAB function

[tree treeName] = xml_read(DOM); % Convert DOM object to Struct

disp([treeName ' ='])

gen_object_display(tree)

Write XML file based on a DOM using

"xml_write_xerces"xmlwrite_xerces('', DOM); % Save DOM object

using Xerces library

type('')

Matlab 7.0 中XML文件读写测试

Matlab 7.0 中对xml的读写操作主要使用到 [toolboxmatlabiofun] 工具包中的

xmlread.m 和 xmlwrite.m 文件。使用XML Document Object Model的方法，实现对xml文

件的操作。Matlab中的xml操作实际上采用了Java中的DOM的方法。

读XML： (MATLAB701安安装路径下)toolboxmatlabiofun 的 xmlread.m

XMLREAD [转换一个XML文档，返回一个Document Object Model节点。]

DOMNODE = XMLREAD(FILENAME) 读取一个文件名或XML的URL，

并对文档转换返回一个Document Object Model节点。

写XML： (MATLAB701安安装路径下)toolboxmatlabiofun 的 xmlwrite.m

XMLWRITE [序列化一个 XML Document Object Model 节点成为一个 输出文件。]

XMLWRITE(FILENAME,DOMNODE) 序列化 DOMNODE 成为

FILENAME 所指定的文件。

S = XMLWRITE(DOMNODE) 以字符串的方式返回这个XML节点树。

在Matlab m文件编辑器中编写需要用到XML文件的m文件时，由于Matlab环境路径

变量的设置，测试运行时不需要把xmlread.m和xmlwrite.m拷贝到同一路径。但是需要作成

COM组件时，需要把这两个文件和用户作成的m文件一起添加进COM作成工程。编译后

的dll才能够实现对xml文件的读写操作。

对XML Document Object Model 更多的了解，可参照 W3C Document Object Model

(DOM)：/DOM/。

对JAVA中使用DOM的方法，可参考Sun Web site：/xml/docs/api。

程序示例：

M文件 （

xmlwritetest1.m

）：

function xmlwritetest1(infilename,outfilename)

tic; % 开始计时

%-----------------IN XML--------------------------------------------%

try

xDoc = xmlread(infilename);

catch

error('Failed to read XML file %s.',infilename);

end

allSylListItems = mentsByTagName('syl');

intCount = 0;

for k = 0:gth-1

thisListItem = (k);

childNode = stChild;

while ~isempty(childNode)

if eType == T_NODE

childText = char(a);

switch char(Name)

case 'rm';

intCount = intCount + 1;

rm(intCount) = str2double(char(childText));

case 'rp' ;

rp(intCount) = str2double(char(childText));

end

end

childNode = tSibling;

end

end

%-----------------Process--------------------------------------------%

% 转为列向量

rp = rp(:);

rm = rm(:);

%获取样本数

n=length(rp);

if length(rm) ~= n

ReturnCode = 1

ReturnMsg = 'Rp,Rm样本数据维数不一致';

else

ReturnCode = 0

ReturnMsg = '最终结果';

outBETA = beta(rp,rm);

end

Runtime = toc; %执行时间

%-----------------OUT XML--------------------------------------------%

% 创建 XML document.

docNode = Document('outBETA');

docRootNode = umentElement;

%添加结果数据

if ReturnCode == 0

for i=1:length(outBETA)

thisElement = Element('Beta');

(TextNode(sprintf('%f',outBETA(i))));

Child(thisElement);

end

end

%添加返回值

%结果代码

CodeElement = Element('ReturnInfo');

(TextNode(sprintf('%d',ReturnCode)));

Child(CodeElement);

%结果信息

MsgElement = Element('ReturnMsg');

(TextNode(sprintf('%s',ReturnMsg)));

Child(MsgElement);

XMLREAD Parse an XML document and return a Document Object Model node.

DOMNODE = XMLREAD(FILENAME) reads a URL or file name in the

string input argument FILENAME. The function returns DOMNODE,

a Document Object Model (DOM) node representing the parsed document.

The node can be manipulated by using standard DOM functions.

Note: A properly parsed document will display to the screen as

>> xDoc = xmlread(...)

xDoc =

[#document: null]

Example 1: All XML files have a single root element. Some XML

files declare a preferred schema file as an attribute of this element.

xDoc = xmlread(fullfile(matlabroot,'toolbox/matlab/general/'));

xRoot = umentElement;

schemaURL = char(ribute('xsi:noNamespaceSchemaLocation'))

Example 2: Each file on the MATLAB path contains

several elements with a and element. This

script finds the callback that corresponds to the label 'Plot Tools'.

infoLabel = 'Plot Tools'; infoCbk = ''; itemFound = false;

xDoc = xmlread(fullfile(matlabroot,'toolbox/matlab/general/'));

% Find a deep list of all elements.

allListItems = mentsByTagName('listitem');

%Note that the item list index is zero-based.

for i=0:gth-1

thisListItem = (i);

childNode = stChild;

while ~isempty(childNode)

%Filter out text, comments, and processing instructions.

if eType == T_NODE

%Assume that each element has a single child

childText = char(a);

switch char(Name)

case 'label' ; itemFound = strcmp(childText,infoLabel);

case 'callback' ; infoCbk = childText;

end

end

childNode = tSibling;

end

if itemFound break; else infoCbk = ''; end

end

disp(sprintf('Item "%s" has a callback of "%s".',infoLabel,infoCbk))

See also xmlwrite, xslt.

Reference page in Help browser

doc xmlread

建议你多用下help,.

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