JsonCpp Documentation
来源:互联网 发布:后氧传感器数据偏高 编辑:程序博客网 时间:2024/06/06 20:30
JasonCpp文档连接:http://jsoncpp.sourceforge.net/index.html
Introduction
JSON (JavaScript Object Notation) is a lightweight data-interchange format. It can represent integer, real number, string, an ordered sequence of value, and a collection of name/value pairs.Here is an example of JSON data:
// Configuration options{ // Default encoding for text "encoding" : "UTF-8", // Plug-ins loaded at start-up "plug-ins" : [ "python", "c++", "ruby" ], // Tab indent size "indent" : { "length" : 3, "use_space": true }}
Features
- read and write JSON document
- attach C and C++ style comments to element during parsing
- rewrite JSON document preserving original comments
Notes: Comments used to be supported in JSON but where removed for portability (C like comments are not supported in Python). Since comments are useful in configuration/input file, this feature was preserved.
Code example
Json::Value root; // will contains the root value after parsing.Json::Reader reader;bool parsingSuccessful = reader.parse( config_doc, root );if ( !parsingSuccessful ){ // report to the user the failure and their locations in the document. std::cout << "Failed to parse configuration\n" << reader.getFormattedErrorMessages(); return;}// Get the value of the member of root named 'encoding', return 'UTF-8' if there is no// such member.std::string encoding = root.get("encoding", "UTF-8" ).asString();// Get the value of the member of root named 'encoding', return a 'null' value if// there is no such member.const Json::Value plugins = root["plug-ins"];for ( int index = 0; index < plugins.size(); ++index ) // Iterates over the sequence elements. loadPlugIn( plugins[index].asString() ); setIndentLength( root["indent"].get("length", 3).asInt() );setIndentUseSpace( root["indent"].get("use_space", true).asBool() );// ...// At application shutdown to make the new configuration document:// Since Json::Value has implicit constructor for all value types, it is not// necessary to explicitly construct the Json::Value object:root["encoding"] = getCurrentEncoding();root["indent"]["length"] = getCurrentIndentLength();root["indent"]["use_space"] = getCurrentIndentUseSpace();Json::StyledWriter writer;// Make a new JSON document for the configuration. Preserve original comments.std::string outputConfig = writer.write( root );// You can also use streams. This will put the contents of any JSON// stream at a particular sub-value, if you'd like.std::cin >> root["subtree"];// And you can write to a stream, using the StyledWriter automatically.std::cout << root;
Build instructions
The build instructions are located in the file README.txt in the top-directory of the project.Permanent link to the latest revision of the file in subversion: latest README.txt
Download
The sources can be downloaded from SourceForge download page.The latest version of the source is available in the project's subversion repository: http://jsoncpp.svn.sourceforge.net/svnroot/jsoncpp/trunk/
To checkout the source, see the following instructions.
What's New?
The description of latest changes can be found in NEWS.txt in the top-directory of the project.Permanent link to the latest revision of the file in subversion: latest NEWS.txt
Project links
- json-cpp home
- json-cpp sourceforge project
Related links
- JSON Specification and alternate language implementations.
- YAML A data format designed for human readability.
- UTF-8 and Unicode FAQ.
License
See file LICENSE in the top-directory of the project.Basically JsonCpp is licensed under MIT license, or public domain if desired and recognized in your jurisdiction.
Introduction
JSON (JavaScript Object Notation) is a lightweight data-interchange format. It can represent integer, real number, string, an ordered sequence of value, and a collection of name/value pairs.Here is an example of JSON data:
// Configuration options{ // Default encoding for text "encoding" : "UTF-8", // Plug-ins loaded at start-up "plug-ins" : [ "python", "c++", "ruby" ], // Tab indent size "indent" : { "length" : 3, "use_space": true }}
Features
- read and write JSON document
- attach C and C++ style comments to element during parsing
- rewrite JSON document preserving original comments
Notes: Comments used to be supported in JSON but where removed for portability (C like comments are not supported in Python). Since comments are useful in configuration/input file, this feature was preserved.
Code example
Json::Value root; // will contains the root value after parsing.Json::Reader reader;bool parsingSuccessful = reader.parse( config_doc, root );if ( !parsingSuccessful ){ // report to the user the failure and their locations in the document. std::cout << "Failed to parse configuration\n" << reader.getFormattedErrorMessages(); return;}// Get the value of the member of root named 'encoding', return 'UTF-8' if there is no// such member.std::string encoding = root.get("encoding", "UTF-8" ).asString();// Get the value of the member of root named 'encoding', return a 'null' value if// there is no such member.const Json::Value plugins = root["plug-ins"];for ( int index = 0; index < plugins.size(); ++index ) // Iterates over the sequence elements. loadPlugIn( plugins[index].asString() ); setIndentLength( root["indent"].get("length", 3).asInt() );setIndentUseSpace( root["indent"].get("use_space", true).asBool() );// ...// At application shutdown to make the new configuration document:// Since Json::Value has implicit constructor for all value types, it is not// necessary to explicitly construct the Json::Value object:root["encoding"] = getCurrentEncoding();root["indent"]["length"] = getCurrentIndentLength();root["indent"]["use_space"] = getCurrentIndentUseSpace();Json::StyledWriter writer;// Make a new JSON document for the configuration. Preserve original comments.std::string outputConfig = writer.write( root );// You can also use streams. This will put the contents of any JSON// stream at a particular sub-value, if you'd like.std::cin >> root["subtree"];// And you can write to a stream, using the StyledWriter automatically.std::cout << root;
Build instructions
The build instructions are located in the file README.txt in the top-directory of the project.Permanent link to the latest revision of the file in subversion: latest README.txt
Download
The sources can be downloaded from SourceForge download page.The latest version of the source is available in the project's subversion repository: http://jsoncpp.svn.sourceforge.net/svnroot/jsoncpp/trunk/
To checkout the source, see the following instructions.
What's New?
The description of latest changes can be found in NEWS.txt in the top-directory of the project.Permanent link to the latest revision of the file in subversion: latest NEWS.txt
Project links
- json-cpp home
- json-cpp sourceforge project
Related links
- JSON Specification and alternate language implementations.
- YAML A data format designed for human readability.
- UTF-8 and Unicode FAQ.
License
See file LICENSE in the top-directory of the project.Basically JsonCpp is licensed under MIT license, or public domain if desired and recognized in your jurisdiction.
- JsonCpp Documentation
- JSONCPP
- jsoncpp
- jsoncpp
- JsonCpp
- jsoncpp
- Documentation
- Documentation
- Jsoncpp遍历
- jsoncpp例子
- JSONCpp编译
- Jsoncpp更新
- Jsoncpp使用
- JsonCPP 使用
- JSONCPP安装
- JSONCPP使用
- 使用jsoncpp
- jsoncpp使用
- 面向对象(Object Oriented,OO)
- UTF-8(BOM,feff) 字节顺序记号
- Yii使用smarty模板
- IOS应用发布NSLog的注释及使用重定向,把控制台内容写入文件
- Understanding Locking in SQL Server——理解SQL Server中的锁
- JsonCpp Documentation
- kettle设计一些ETL任务时一些常见问题
- maven 深入学习 和配置
- location.href 用法
- 4.2.3 设置Qt Creator使其支持交叉编译
- 安装man文档
- struct stat 结构体解释
- 无法读取xml头部dtd的原因
- VC++深入详解(18):钩子函数