package com.zving.demo; import java.io.File; import java.io.FileOutputStream; import java.io.FileReader; import java.io.OutputStreamWriter; import com.google.gson.JsonArray; import com.google.gson.JsonObject; import com.google.gson.JsonParser; public class JSONStudy { public static void main(String[] args) { writeJSON(); readJSON(); } public static void writeJSON() { JsonObject object = new JsonObject(); object.addProperty("Info", "学生数据"); JsonArray array = new JsonArray(); JsonObject obj1 = new JsonObject(); obj1.addProperty("id", 1); obj1.addProperty("name", "张三"); obj1.addProperty("sex", "男"); obj1.addProperty("age", 18); array.add(obj1); JsonObject obj2 = new JsonObject(); obj2.addProperty("id", 2); obj2.addProperty("name", "李四"); obj2.addProperty("sex", "女"); obj2.addProperty("age", 22); array.add(obj2); JsonObject obj3 = new JsonObject(); obj3.addProperty("id", 3); obj3.addProperty("name", "王五"); obj3.addProperty("sex", "男"); obj3.addProperty("age", 20); array.add(obj3); object.add("Student", array); try { FileOutputStream fos = new FileOutputStream(new File("resource/jsonLearn.json")); OutputStreamWriter osw = new OutputStreamWriter(fos, "utf-8"); osw.write(object.toString()); osw.flush(); osw.close(); } catch (Exception e) { e.printStackTrace(); } } public static void readJSON() { try { JsonParser parser = new JsonParser(); JsonObject object = (JsonObject) parser.parse(new FileReader("resource/jsonLearn.json")); String info = new String(object.get("Info").getAsString().getBytes("GBK"), "utf-8"); System.out.println("Info内容是:" + info); JsonArray array = object.getAsJsonArray("Student").getAsJsonArray(); for (int i = 0; i < array.size(); i++) { JsonObject obj = array.get(i).getAsJsonObject(); int id = obj.get("id").getAsInt(); String name = new String(obj.get("name").getAsString().getBytes("GBK"), "utf-8"); String sex = new String(obj.get("sex").getAsString().getBytes("GBK"), "utf-8"); int age = obj.get("age").getAsInt(); System.out.println("第" + i + "行数据为: " + id + " " + name + " " + sex + " " + age); } } catch (Exception e) { e.printStackTrace(); } } }
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