libxml2的安裝:
1.安裝包:http://xmlsoft.org/,我下載的地方是http://xmlsoft.org/sources/old/
2.下載好壓縮包後,對其進行解壓,解壓的命令是:sudo tar xvzf libxml2-2.7.1.tar.gz
3.配置,編譯安裝過程:
解壓好之後,進入解壓好的檔案夾中:
cd libxml2-2.7.1
(預設路徑安裝)
sudo ./configure
sudo make
sudo make install
(自己設定安裝路徑)
或則
sudo ./configure --prefix /home/user/myxml/xmlinst
sudo make
sudo make install
export PATH=/home/user/myxml/xmlinst/bin:$PATH
我是按照預設路徑安裝的,因此下面的樣本編譯方法都是針對預設路徑的。
libxml2經典應用樣本xmlCreator.cpp:
1 #include <stdio.h> 2 #include <libxml/parser.h> 3 #include <libxml/tree.h> 4 5 int main(int argc,char **argv) 6 { 7 xmlDocPtr doc = NULL;/*document pointer*/ 8 xmlNodePtr root_node = NULL,node = NULL,node1 = NULL;/*node pointers*/ 9 //Creates a new document,a node and set it as a root node10 doc = xmlNewDoc(BAD_CAST"1.0");11 root_node = xmlNewNode(NULL,BAD_CAST"root");12 xmlDocSetRootElement(doc,root_node);13 //creates a new node,which is "attached" as child node of root_node node.14 xmlNewChild(root_node,NULL,BAD_CAST"node1",BAD_CAST"content of node1");15 16 //xmlNewProp()creates attributes,which is "attached" to an node.17 node = xmlNewChild(root_node,NULL,BAD_CAST"node3",BAD_CAST"node has attributes");18 xmlNewProp(node,BAD_CAST"attribute",BAD_CAST"yes");19 20 //Here goes another way to create nodes.21 node = xmlNewNode(NULL,BAD_CAST"node4");22 node1 = xmlNewText(BAD_CAST"other way to create content");23 24 xmlAddChild(node,node1);25 xmlAddChild(root_node,node);26 27 //Dumping document to stdio or file28 xmlSaveFormatFileEnc(argc > 1 ? argv[1]:"-",doc,"UTF-8",1);29 30 /*free the document*/31 xmlFreeDoc(doc);32 xmlCleanupParser();33 xmlMemoryDump();//debug memory for regression tests34 35 return 0;36 }
編譯過程:此處是cpp檔案,因此是,g++ xmlCreator.cpp -o xmlCreator -I /usr/local/include/libxml2 -L /usr/local/lib -lxml2
如果是c檔案,則應該改為:gcc xmlCreator.cpp -o xmlCreator -I /usr/local/include/libxml2 -L /usr/local/lib -lxml2
******-I 後接標頭檔目錄 -L後接lib庫目錄
......$ 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
因此,出現這種錯誤的時候,要注意看是不是編譯器用錯了,用gcc編譯C程式,用g++編譯C++程式,對號入座就沒有問題了。
產生xmlCreator檔案後,運行結果如下:
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>
到此,一個使用libxml2庫建立xml檔案的簡單例子就講完了。。。。。。