JsonCpp 是一个 C++ 用来处理 JSON 数据的开发包。    <h3><a class="anchor" name="_features">功能特性：</a></h3>    <ul>     <li>读和写JSON文档</li>     <li>在解析的时候添加C 和 C++ 风格的注释</li>     <li>rewrite JSON document preserving original comments</li>    </ul>    <p>示例代码：</p>    <pre class="brush:cpp; toolbar: true; auto-links: false;">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;</pre>    <p><strong>项目主页：</strong><a href="http://www.open-open.com/lib/view/home/1324129892062" target="_blank">http://www.open-open.com/lib/view/home/1324129892062</a></p>    <p></p>