前言

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json数据

{ "resultcode": "200", "reason": "successed!", "result": { "sk": { "temp": "24", "wind_direction": "西南风", "wind_strength": "2级", "humidity": "51%", "time": "10:11" }, "today": { "temperature": "16℃~27℃", "weather": "阴转多云", "weather_id": { "fa": "02", "fb": "01" }, "wind": "西南风3-4 级", "week": "星期四", "city": "滨州", "date_y": "2015年06月04日", "dressing_index": "舒适", "dressing_advice": "建议着长袖T恤、衬衫加单裤等服装。年老体弱者宜着针织长袖衬衫、马甲和长裤。", "uv_index": "最弱", "comfort_index": "", "wash_index": "较适宜", "travel_index": "", "exercise_index": "较适宜", "drying_index": "" }, "future": [ { "temperature": "16℃~27℃", "weather": "阴转多云", "weather_id": { "fa": "02", "fb": "01" }, "wind": "西南风3-4 级", "week": "星期四", "date": "20150604" }, { "temperature": "20℃~32℃", "weather": "多云转晴", "weather_id": { "fa": "01", "fb": "00" }, "wind": "西风3-4 级", "week": "星期五", "date": "20150605" }, { "temperature": "23℃~35℃", "weather": "多云转阴", "weather_id": { "fa": "01", "fb": "02" }, "wind": "西南风3-4 级", "week": "星期六", "date": "20150606" }, { "temperature": "20℃~33℃", "weather": "多云", "weather_id": { "fa": "01", "fb": "01" }, "wind": "北风微风", "week": "星期日", "date": "20150607" }, { "temperature": "22℃~34℃", "weather": "多云", "weather_id": { "fa": "01", "fb": "01" }, "wind": "西南风3-4 级", "week": "星期一", "date": "20150608" }, { "temperature": "22℃~33℃", "weather": "阴", "weather_id": { "fa": "02", "fb": "02" }, "wind": "西南风3-4 级", "week": "星期二", "date": "20150609" }, { "temperature": "22℃~33℃", "weather": "多云", "weather_id": { "fa": "01", "fb": "01" }, "wind": "南风3-4 级", "week": "星期三", "date": "20150610" } ] }, "error_code": 0}

解析JSONObject

import com.google.gson.JsonObject;import com.google.gson.JsonParser;import com.google.gson.JsonSyntaxException;import com.google.gson.JsonIOException;import java.io.FileNotFoundException;import java.io.FileReader;public class ReadJson { public static void main(String []args) { JsonParser parse = new JsonParser(); try { JsonObject json = (JsonObject) parse.parse(new FileReader("weather.json")); System.out.println("resultcode:" + json.get("resultcodeu").getAsInt()); System.out.println("reason:" + json.get("reason").getAsString()); JsonObject result = json.get("result").getAsJsonObject(); JsonObject today = result.get("today").getAsJsonObject(); System.out.println("weak:" + today.get("week").getAsString()); System.out.println("weather:" + today.get("weather").getAsString()); } catch (JsonIOException e) { e.printStackTrace(); } catch (NullPointerException e) { e.printStackTrace(); } catch (JsonSyntaxException e){ e.printStackTrace(); } catch (FileNotFoundException e) { e.printStackTrace(); } }}

解析JSONArray

import com.google.gson.JsonParser;import com.google.gson.JsonArray;import com.google.gson.JsonObject;import com.google.gson.JsonSyntaxException;import com.google.gson.JsonIOException;import java.io.FileNotFoundException;import java.io.FileReader;public class ReadJsonArray { public static void main(String []args) { JsonParser parse = new JsonParser(); try { JsonObject json = (JsonObject)parse.parse(new FileReader("C:\\Users\\wzh94434\\IdeaProjects\\TestProject\\jsontest\\src\\main\\java\\weather.json")); JsonObject result = json.get("result").getAsJsonObject(); JsonArray futureArray = result.get("future").getAsJsonArray(); for (int i = 0; i < futureArray.size(); ++i) { JsonObject subObj = futureArray.get(i).getAsJsonObject(); System.out.println("------"); System.out.println("week:" + subObj.get("week").getAsString()); System.out.println("weather:" + subObj.get("weather").getAsString()); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (JsonIOException e) { e.printStackTrace(); } catch (JsonSyntaxException e) { e.printStackTrace(); } }}

注意：文件路径相对路径是从工程根目录开始

总结

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