Java中Json字串直接轉換為物件(包括多層List集合)
阿新 • • 發佈：2019-01-28
使用到的類：net.sf.json.JSONObject
使用JSON時，除了要匯入JSON網站上面下載的json-lib-2.2-jdk15.jar包之外，還必須有其它幾個依賴包：commons-beanutils.jar，commons-httpclient.jar，commons-lang.jar，ezmorph.jar，morph-1.0.1.jar
下面是例子程式碼：
// JSON轉換 JSONObject jsonObj = JSONObject.fromObject(jsonStrBody); Map<String, Class> classMap = new HashMap<String, Class>(); classMap.put("results", WeatherBean_Baidu_City.class); classMap.put("index", WeatherBean_Baidu_City_Index.class); classMap.put("weather_data", WeatherBean_Baidu_City_Weatherdata.class); // 將JSON轉換成WeatherBean_Baidu WeatherBean_Baidu weather = (WeatherBean_Baidu) JSONObject.toBean(jsonObj, WeatherBean_Baidu.class, classMap); System.out.println(weather.getResults());
使用到的幾個JAVA類程式碼：
package com.lenovo.conference.entity.vo; import java.io.Serializable; import java.util.List; /** * 天氣Bean * * @author SHANHY * */ @SuppressWarnings("serial") public class WeatherBean_Baidu implements Serializable { private String error;//錯誤號 private String status;//狀態值 private String date;//日期 private List<WeatherBean_Baidu_City> results;//城市天氣預報集合（因為一次可以查詢多個城市） public WeatherBean_Baidu() { super(); } public String getError() { return error; } public void setError(String error) { this.error = error; } public String getStatus() { return status; } public void setStatus(String status) { this.status = status; } public String getDate() { return date; } public void setDate(String date) { this.date = date; } public List<WeatherBean_Baidu_City> getResults() { return results; } public void setResults(List<WeatherBean_Baidu_City> results) { this.results = results; } }
package com.lenovo.conference.entity.vo; import java.io.Serializable; import java.util.List; /** * 天氣Bean * * @author SHANHY * */ @SuppressWarnings("serial") public class WeatherBean_Baidu_City implements Serializable { private String currentCity;//城市名稱 private String pm25;//pm2.5值 private List<WeatherBean_Baidu_City_Index> index;//指數集合 private List<WeatherBean_Baidu_City_Weatherdata> weather_data;//幾天的天氣集合 public WeatherBean_Baidu_City() { super(); } public String getCurrentCity() { return currentCity; } public void setCurrentCity(String currentCity) { this.currentCity = currentCity; } public String getPm25() { return pm25; } public void setPm25(String pm25) { this.pm25 = pm25; } public List<WeatherBean_Baidu_City_Index> getIndex() { return index; } public void setIndex(List<WeatherBean_Baidu_City_Index> index) { this.index = index; } public List<WeatherBean_Baidu_City_Weatherdata> getWeather_data() { return weather_data; } public void setWeather_data( List<WeatherBean_Baidu_City_Weatherdata> weather_data) { this.weather_data = weather_data; } }
package com.lenovo.conference.entity.vo;
import java.io.Serializable;
/**
* 天氣Bean
*
* @author SHANHY
*
*/
@SuppressWarnings("serial")
public class WeatherBean_Baidu_City_Weatherdata implements Serializable {
private String date;// 日期
private String dayPictureUrl;// 白天的天氣圖片
private String nightPictureUrl;// 晚上的天氣圖片
private String weather;// 天氣
private String wind;// 風向
private String temperature;// 溫度
public WeatherBean_Baidu_City_Weatherdata() {
super();
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public String getDayPictureUrl() {
return dayPictureUrl;
}
public void setDayPictureUrl(String dayPictureUrl) {
this.dayPictureUrl = dayPictureUrl;
}
public String getNightPictureUrl() {
return nightPictureUrl;
}
public void setNightPictureUrl(String nightPictureUrl) {
this.nightPictureUrl = nightPictureUrl;
}
public String getWeather() {
return weather;
}
public void setWeather(String weather) {
this.weather = weather;
}
public String getWind() {
return wind;
}
public void setWind(String wind) {
this.wind = wind;
}
public String getTemperature() {
return temperature;
}
public void setTemperature(String temperature) {
this.temperature = temperature;
}
}
package com.lenovo.conference.entity.vo;
import java.io.Serializable;
/**
* 天氣Bean
*
* @author SHANHY
*
*/
@SuppressWarnings("serial")
public class WeatherBean_Baidu_City_Index implements Serializable {
private String title;//標題
private String zs;//舒適度
private String tipt;//指數簡述
private String des;//指數概述
public WeatherBean_Baidu_City_Index() {
super();
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getZs() {
return zs;
}
public void setZs(String zs) {
this.zs = zs;
}
public String getTipt() {
return tipt;
}
public void setTipt(String tipt) {
this.tipt = tipt;
}
public String getDes() {
return des;
}
public void setDes(String des) {
this.des = des;
}
}
例子中解析所對應的JSON字串
{"error":0,"status":"success","date":"2015-01-15","results":[{"currentCity":"南京","pm25":"83","index":[{"title":"穿衣","zs":"較冷","tipt":"穿衣指數","des":"建議著厚外套加毛衣等服裝。年老體弱者宜著大衣、呢外套加羊毛衫。"},{"title":"洗車","zs":"較適宜","tipt":"洗車指數","des":"較適宜洗車，未來一天無雨，風力較小，擦洗一新的汽車至少能保持一天。"},{"title":"旅遊","zs":"適宜","tipt":"旅遊指數","des":"天氣較好，氣溫稍低，會感覺稍微有點涼，不過也是個好天氣哦。適宜旅遊，可不要錯過機會呦！"},{"title":"感冒","zs":"少發","tipt":"感冒指數","des":"各項氣象條件適宜，無明顯降溫過程，發生感冒機率較低。"},{"title":"運動","zs":"較不宜","tipt":"運動指數","des":"陰天，且天氣寒冷，推薦您在室內進行低強度運動；若堅持戶外運動，請選擇合適的運動並注意保暖。"},{"title":"紫外線強度","zs":"最弱","tipt":"紫外線強度指數","des":"屬弱紫外線輻射天氣，無需特別防護。若長期在戶外，建議塗擦SPF在8-12之間的防晒護膚品。"}],"weather_data":[{"date":"週四 01月15日 (實時：6℃)","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/yin.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/duoyun.png","weather":"陰轉多雲","wind":"北風微風","temperature":"8 ~ 4℃"},{"date":"週五","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/qing.png","weather":"多雲轉晴","wind":"西北風3-4級","temperature":"12 ~ 0℃"},{"date":"週六","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/qing.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/duoyun.png","weather":"晴轉多雲","wind":"東北風3-4級","temperature":"8 ~ 0℃"},{"date":"週日","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/qing.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/qing.png","weather":"晴","wind":"西風微風","temperature":"10 ~ -1℃"}]},{"currentCity":"徐州","pm25":"154","index":[{"title":"穿衣","zs":"較冷","tipt":"穿衣指數","des":"建議著厚外套加毛衣等服裝。年老體弱者宜著大衣、呢外套加羊毛衫。"},{"title":"洗車","zs":"較適宜","tipt":"洗車指數","des":"較適宜洗車，未來一天無雨，風力較小，擦洗一新的汽車至少能保持一天。"},{"title":"旅遊","zs":"適宜","tipt":"旅遊指數","des":"天氣較好，但絲毫不會影響您出行的心情。溫度適宜又有微風相伴，適宜旅遊。"},{"title":"感冒","zs":"較易發","tipt":"感冒指數","des":"天氣較涼，較易發生感冒，請適當增加衣服。體質較弱的朋友尤其應該注意防護。"},{"title":"運動","zs":"較不宜","tipt":"運動指數","des":"天氣較好，但考慮天氣寒冷，推薦您進行各種室內運動，若在戶外運動請注意保暖並做好準備活動。"},{"title":"紫外線強度","zs":"最弱","tipt":"紫外線強度指數","des":"屬弱紫外線輻射天氣，無需特別防護。若長期在戶外，建議塗擦SPF在8-12之間的防晒護膚品。"}],"weather_data":[{"date":"週四 01月15日 (實時：6℃)","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/duoyun.png","weather":"多雲","wind":"南風微風","temperature":"10 ~ 3℃"},{"date":"週五","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/duoyun.png","weather":"多雲","wind":"北風3-4級","temperature":"11 ~ -4℃"},{"date":"週六","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/duoyun.png","weather":"多雲","wind":"東風微風","temperature":"6 ~ -4℃"},{"date":"週日","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/duoyun.png","weather":"多雲","wind":"西風3-4級","temperature":"11 ~ -1℃"}]}]}