json을 취득, 표시하는 어플리케이션 10

import groovy.swing.SwingBuilder
import groovy.json.JsonOutput
import groovy.json.JsonSlurper
import groovy.beans.Bindable
import javax.swing.*
import javax.swing.tree.DefaultMutableTreeNode as TreeNode
import java.awt.*
import java.net.*

def manager = new CookieManager()
manager.cookiePolicy = CookiePolicy.ACCEPT_ALL
CookieHandler.default = manager

@Bindable
class Model {
    String method = 'GET'
    String url = ''
    String params = ''
    String header = ''
    String json = ''
}
def model = new Model()

def tabPane
def jsonTree

class TreeUtil {
    def clearTree = { jsonTree ->
        jsonTree.model.root.removeAllChildren()
        jsonTree.model.reload(jsonTree.model.root)
    }

    def reloadTree = { jsonTree, json ->
        clearTree(jsonTree)
        createNode(jsonTree.model.root, json)
        jsonTree.model.reload(jsonTree.model.root)
    }

    def createNode = { node, json ->
        if (json instanceof HashMap) {
            json.each { key, value ->
                def childNode = new TreeNode(key)
                node.add(childNode)
                createNode(childNode, value)
            }
        } else if (json instanceof ArrayList) {
            json.eachWithIndex { child, index ->
                def childNode = new TreeNode(index + 1)
                node.add(childNode)
                createNode(childNode, child)
            }
        } else {
            node.add(new TreeNode(json))
        }
    }
}
def treeUtil = new TreeUtil()

def prettyPrint = { text ->
    def result = JsonOutput.prettyPrint(text)
    (result =~ /\\u[0-9a-zA-Z]{4}/).each { match ->
        def code = match[2..5]
        def encTxt = new String([Integer.parseInt(code, 16)] as int[], 0, 1)
        result = result.replaceAll(/\\u${code}/, encTxt)
    }
    result
}

def sendRequest = {
    model.header = ''
    model.json = ''

    def method = model.method
    def url = model.url
    def params = URLEncoder.encode(model.params, 'utf-8').replaceAll('%3D', '=').replaceAll('%26', '&')
    if (method == 'GET') {
        url = "${url}?${params}"
    }

    def conn = url.toURL().openConnection()
    conn.requestMethod = method
    if (method == 'POST') {
        conn.doOutput = true
        conn.outputStream << params
    }

    def header = new StringBuilder()
    conn.headerFields.each { key, fields ->
        fields.each { field ->
            header << "${key ? key + ':' : ''}${field}\n"
        }
    }
    model.header = header.toString()

    model.json = prettyPrint(conn.inputStream.getText('utf-8'))

    def json = new JsonSlurper().parseText(model.json)
    treeUtil.reloadTree(jsonTree, json)

    tabPane.selectedIndex = 2

    conn.disconnect()
}

new SwingBuilder().frame(title:'jsonを取得、表示するアプリケーション', defaultCloseOperation:JFrame.EXIT_ON_CLOSE,
                        size: [800, 600], show:true) {
    lookAndFeel('nimbus')
    borderLayout()
    hbox(constraints: BorderLayout.NORTH) {
        comboBox(items:['GET', 'POST'], selectedItem:bind(source: model, sourceProperty: 'method', mutual: true))
        textField(text:bind(source: model, sourceProperty: 'url', mutual: true))
        button(text:'送信', actionPerformed:sendRequest)
    }
    tabPane = tabbedPane(constraints: BorderLayout.CENTER) {
        scrollPane(name:'パラメータ') {
            textArea(text:bind(source: model, sourceProperty: 'params', mutual: true))
        }
        scrollPane(name:'ヘッダ') {
            textArea(editable:false, text:bind {model.header})
        }
        scrollPane(name:'レスポンス（テキスト）') {
            textArea(editable:false, text:bind {model.json})
        }
        scrollPane(name:'レスポンス（ツリー）') {
            jsonTree = tree(rootVisible: false)
            treeUtil.clearTree(jsonTree)
        }
    }
}