[groovy]100本斬りお題39

jackson.groovy

// g100pon #39 JSONの読み書き。Grails無しで

/*
/works/test/ichiro.json
------------------------
{
  "名前" : { "first" : "一朗", "last" : "鈴木" },
  "打率" : ".315",
  "打点" : "43",
  "本塁打" : "6"
}
------------------------
*/

import org.codehaus.jackson.map.ObjectMapper
@Grab(group='org.codehaus.jackson', module='jackson-mapper-lgpl', version='1.6.0')

//読み込み
String jsonText = new File("/works/test/ichiro.json").getText("UTF8")
def map = new ObjectMapper().readValue(jsonText, Map)
assert map == ["名前":["first":"一朗", "last":"鈴木"], "打率":".315", "打点":"43", "本塁打":"6"]
assert map.getClass().toString() == "class java.util.LinkedHashMap"

//書き出し
map."安打" = "214"
new ObjectMapper().writeValue(new File('/works/test/ichiro_2.json'),map);

/*
/works/test/ichiro_2.json
------------------------
{"名前":{"first":"一朗","last":"鈴木"},"打率":".315","打点":"43","本塁打":"6","安打":"214"}
------------------------
*/