Linux (Ubuntu10.04) libxml2 installation and use example

Libxml2 installation:

1. Installation Package: http://xmlsoft.org/where I download: http://xmlsoft.org/sources/old/

2. Download the compressed package, decompress it, unzip the command is: sudo tar xvzf libxml2-2.7.1.tar.gz

3. Configure and compile the installation process:

After decompression, go to the extracted Folder:

Cd libxml2-2.7.1

(Installed in the default path)

Sudo./configure

Sudo make

Sudo make install

(Set the installation path by yourself)

Or

Sudo./configure -- prefix/home/user/myxml/xmlinst

Sudo make

Sudo make install

Export PATH =/home/user/myxml/xmlinst/bin: $ PATH

 

I installed it in the default path, so the following sample compilation method is for the default path.

Typical libxml2 application example xmlCreator. cpp:

 1 #include <stdio.h> 2 #include <libxml/parser.h> 3 #include <libxml/tree.h> 4  5 int main(int argc,char **argv) 6 { 7     xmlDocPtr doc = NULL;/*document pointer*/ 8     xmlNodePtr root_node = NULL,node = NULL,node1 = NULL;/*node pointers*/ 9     //Creates a new document,a node and set it as a root node10     doc = xmlNewDoc(BAD_CAST"1.0");11     root_node = xmlNewNode(NULL,BAD_CAST"root");12     xmlDocSetRootElement(doc,root_node);13     //creates a new node,which is "attached" as child node of root_node node.14     xmlNewChild(root_node,NULL,BAD_CAST"node1",BAD_CAST"content of node1");15     16     //xmlNewProp()creates attributes,which is "attached" to an node.17     node = xmlNewChild(root_node,NULL,BAD_CAST"node3",BAD_CAST"node has attributes");18     xmlNewProp(node,BAD_CAST"attribute",BAD_CAST"yes");19     20     //Here goes another way to create nodes.21     node = xmlNewNode(NULL,BAD_CAST"node4");22     node1 = xmlNewText(BAD_CAST"other way to create content");23     24     xmlAddChild(node,node1);25     xmlAddChild(root_node,node);26 27     //Dumping document to stdio or file28     xmlSaveFormatFileEnc(argc > 1 ? argv[1]:"-",doc,"UTF-8",1);29 30     /*free the document*/31     xmlFreeDoc(doc);32     xmlCleanupParser();33     xmlMemoryDump();//debug memory for regression tests34     35     return 0;36 }

Compilation process: This is the cpp file. Therefore,G ++ xmlCreator. cpp-o xmlCreator-I/usr/local/include/libxml2-L/usr/local/lib-lxml2

If it is a c file, it should be changed:Gcc xmlCreator. cpp-o xmlCreator-I/usr/local/include/libxml2-L/usr/local/lib-Lxml2

* *****-I directory of the Post-connector file-L directory followed by the lib Library

 

......$ gcc xmlCreator.cpp -o xmlCreator -I /usr/local/include/libxml2 -lxml2/tmp/ccPeKBRE.o:(.eh_frame+0x12): undefined reference to `__gxx_personality_v0'collect2: ld returned 1 exit status
......$ g++ xmlCreator.cpp -o xmlCreator -I /usr/local/include/libxml2 -lxml2        ---------------ok

 

 Therefore, when this error occurs, check whether the compiler is using an error. Use gcc to compile the C program, and use g ++ to compile the C ++ program. The check mark is no problem.

After the xmlCreator file is generated, the running result is as follows:

1 <?xml version="1.0" encoding="UTF-8"?>2 <root>3   <node1>content of node1</node1>4   <node3 attribute="yes">node has attributes</node3>5   <node4>other way to create content</node4>6 </root>

At this point, a simple example of creating an xml file using the libxml2 library is complete ......