| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.juneau.examples.core.json; |
| |
| import org.apache.juneau.examples.core.pojo.Pojo; |
| import org.apache.juneau.json.JsonParser; |
| import org.apache.juneau.json.JsonSerializer; |
| import org.apache.juneau.json.SimpleJsonSerializer; |
| |
| import java.util.Map; |
| |
| /** |
| * Sample class which shows the simple usage of JsonSerializer and JsonParser. |
| * |
| * <ul class='seealso'> |
| * <li class='extlink'>{@source} |
| * </ul> |
| */ |
| public class JsonSimpleExample { |
| |
| /** |
| * Serializing Pojo bean into Json format and Deserialize back to Pojo instance type. |
| * |
| * @param args Unused. |
| * @throws Exception Unused. |
| */ |
| @SuppressWarnings({ "unused", "rawtypes" }) |
| public static void main(String[] args) throws Exception{ |
| // Juneau provides static constants with the most commonly used configurations |
| // Get a reference to a serializer - converting POJO to flat format |
| // Produces |
| // {"name":"name","id":"id"} |
| JsonSerializer jsonSerializer = JsonSerializer.DEFAULT; |
| // Get a reference to a parser - converts that flat format back into the POJO |
| JsonParser jsonParser = JsonParser.DEFAULT; |
| |
| Pojo pojo = new Pojo("id","name"); |
| |
| String flat = jsonSerializer.serialize(pojo); |
| // Print out the created POJO in JSON format. |
| System.out.println(flat); |
| |
| Pojo parse = jsonParser.parse(flat, Pojo.class); |
| |
| assert parse.getId().equals(pojo.getId()); |
| assert parse.getName().equals(pojo.getName()); |
| |
| // Produces |
| // {name:'name',id:'id'} |
| String simpleJson = SimpleJsonSerializer.DEFAULT.serialize(pojo); |
| System.out.println(simpleJson); |
| |
| // Parse a JSON object (creates a generic ObjectMap). |
| String json = "{name:'John Smith',age:21}"; |
| Map m1 = jsonParser.parse(json, Map.class); |
| |
| // Parse a JSON string. |
| json = "'foobar'"; |
| String s2 = jsonParser.parse(json, String.class); |
| |
| // Parse a JSON number as a Long or Float. |
| json = "123"; |
| Long l3 = jsonParser.parse(json, Long.class); |
| Float f3 = jsonParser.parse(json, Float.class); |
| |
| // The object above can be parsed thanks to the @Beanc(properties = id,name) annotation on Pojo |
| // Using this approach, you can keep your POJOs immutable, and still serialize and deserialize them. |
| } |
| } |