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added working example
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6 files changed

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‎example/jsontest/CMakeLists.txt

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cmake_minimum_required(VERSION 2.8.3)
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project(jsontest)
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add_compile_options(-std=c++11)
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find_package(catkin REQUIRED COMPONENTS)
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find_package(jsoncpp REQUIRED)
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catkin_package(
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INCLUDE_DIRS include
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LIBRARIES
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CATKIN_DEPENDS
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DEPENDS jsoncpp
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)
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include_directories(
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include
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${catkin_INCLUDE_DIRS}
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)
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add_executable(${PROJECT_NAME}_node src/jsontest_node.cpp)
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target_link_libraries(${PROJECT_NAME}_node
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${catkin_LIBRARIES}
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jsoncpp
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)
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‎example/jsontest/package.xml

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<?xml version="1.0"?>
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<package format="2">
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<name>jsontest</name>
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<version>0.0.0</version>
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<description>The jsontest package</description>
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<!-- One maintainer tag required, multiple allowed, one person per tag -->
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<!-- Example: -->
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<!-- <maintainer email="[email protected]">Jane Doe</maintainer> -->
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<maintainer email="[email protected]">cn</maintainer>
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<!-- One license tag required, multiple allowed, one license per tag -->
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<!-- Commonly used license strings: -->
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<!-- BSD, MIT, Boost Software License, GPLv2, GPLv3, LGPLv2.1, LGPLv3 -->
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<license>TODO</license>
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<!-- Url tags are optional, but multiple are allowed, one per tag -->
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<!-- Optional attribute type can be: website, bugtracker, or repository -->
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<!-- Example: -->
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<!-- <url type="website">http://wiki.ros.org/jsontest</url> -->
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<!-- Author tags are optional, multiple are allowed, one per tag -->
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<!-- Authors do not have to be maintainers, but could be -->
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<!-- Example: -->
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<!-- <author email="[email protected]">Jane Doe</author> -->
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<!-- The *depend tags are used to specify dependencies -->
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<!-- Dependencies can be catkin packages or system dependencies -->
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<!-- Examples: -->
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<!-- Use depend as a shortcut for packages that are both build and exec dependencies -->
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<!-- <depend>roscpp</depend> -->
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<!-- Note that this is equivalent to the following: -->
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<!-- <build_depend>roscpp</build_depend> -->
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<!-- <exec_depend>roscpp</exec_depend> -->
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<!-- Use build_depend for packages you need at compile time: -->
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<!-- <build_depend>message_generation</build_depend> -->
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<!-- Use build_export_depend for packages you need in order to build against this package: -->
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<!-- <build_export_depend>message_generation</build_export_depend> -->
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<!-- Use buildtool_depend for build tool packages: -->
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<!-- <buildtool_depend>catkin</buildtool_depend> -->
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<!-- Use exec_depend for packages you need at runtime: -->
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<!-- <exec_depend>message_runtime</exec_depend> -->
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<!-- Use test_depend for packages you need only for testing: -->
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<!-- <test_depend>gtest</test_depend> -->
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<!-- Use doc_depend for packages you need only for building documentation: -->
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<!-- <doc_depend>doxygen</doc_depend> -->
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<buildtool_depend>catkin</buildtool_depend>
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<build_depend>jsoncpp</build_depend>
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<build_export_depend>jsoncpp</build_export_depend>
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<exec_depend>jsoncpp</exec_depend>
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<!-- The export tag contains other, unspecified, tags -->
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<export>
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<!-- Other tools can request additional information be placed here -->
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</export>
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</package>

‎example/jsontest/src/jsontest_node.cpp

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#include <iostream>
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#include <json/json.h>
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int main( int argc, const char* argv[] )
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{
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Json::Value root; // 'root' will contain the root value after parsing.
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std::cin >> root;
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// You can also read into a particular sub-value.
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std::cin >> root["subtree"];
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// Get the value of the member of root named 'encoding',
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// and return 'UTF-8' if there is no such member.
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std::string encoding = root.get("encoding", "UTF-8" ).asString();
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// Get the value of the member of root named 'plug-ins'; return a 'null' value if
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// there is no such member.
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const Json::Value plugins = root["plug-ins"];
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// Iterate over the sequence elements.
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for ( int index = 0; index < plugins.size(); ++index )
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loadPlugIn( plugins[index].asString() );
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// Try other datatypes. Some are auto-convertible to others.
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foo::setIndentLength( root["indent"].get("length", 3).asInt() );
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foo::setIndentUseSpace( root["indent"].get("use_space", true).asBool() );
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// Since Json::Value has an implicit constructor for all value types, it is not
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// necessary to explicitly construct the Json::Value object.
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root["encoding"] = foo::getCurrentEncoding();
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root["indent"]["length"] = foo::getCurrentIndentLength();
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root["indent"]["use_space"] = foo::getCurrentIndentUseSpace();
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// If you like the defaults, you can insert directly into a stream.
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std::cout << root;
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// Of course, you can write to `std::ostringstream` if you prefer.
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// If desired, remember to add a linefeed and flush.
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std::cout << std::endl;
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return 0;
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}

‎example/jsontest/src/test.json

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{
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"stocks": [
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{"symbol": "AAPL",
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"amount": 1.03213,
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"last_price": 1.20},
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{"symbol": "MSFT",
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"amount": 2.31039},
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{"symbol": "F",
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"amount": 0.543589}
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]
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}

‎include/json/version.h

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// DO NOT EDIT. This file (and "version") is generated by CMake.
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// Run CMake configure step to update it.
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#ifndef JSON_VERSION_H_INCLUDED
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#define JSON_VERSION_H_INCLUDED
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# define JSON_VERSION_H_INCLUDED
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#define JSONCPP_VERSION_STRING "1.8.4"
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#define JSONCPP_VERSION_MAJOR 1
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#define JSONCPP_VERSION_MINOR 8
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#define JSONCPP_VERSION_PATCH 4
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#define JSONCPP_VERSION_QUALIFIER
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#define JSONCPP_VERSION_HEXA \
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((JSONCPP_VERSION_MAJOR << 24) | (JSONCPP_VERSION_MINOR << 16) | \
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(JSONCPP_VERSION_PATCH << 8))
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# define JSONCPP_VERSION_STRING "1.8.4"
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# define JSONCPP_VERSION_MAJOR 1
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# define JSONCPP_VERSION_MINOR 8
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# define JSONCPP_VERSION_PATCH 4
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# define JSONCPP_VERSION_QUALIFIER
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# define JSONCPP_VERSION_HEXA ((JSONCPP_VERSION_MAJOR << 24) | (JSONCPP_VERSION_MINOR << 16) | (JSONCPP_VERSION_PATCH << 8))
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#ifdef JSONCPP_USING_SECURE_MEMORY
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#undef JSONCPP_USING_SECURE_MEMORY

‎install_manifest.txt

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/usr/local/lib/pkgconfig/jsoncpp.pc
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/usr/local/lib/cmake/jsoncpp/jsoncppConfig.cmake
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/usr/local/lib/cmake/jsoncpp/jsoncppConfig-release.cmake
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/usr/local/lib/libjsoncpp.a
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/usr/local/include/json/allocator.h
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/usr/local/include/json/assertions.h
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/usr/local/include/json/autolink.h
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/usr/local/include/json/config.h
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/usr/local/include/json/features.h
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/usr/local/include/json/forwards.h
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/usr/local/include/json/json.h
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/usr/local/include/json/reader.h
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/usr/local/include/json/value.h
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/usr/local/include/json/version.h
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/usr/local/include/json/writer.h

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