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Java中Json字符串直接转换为对象办法(包括多层List集合)

时间:2018-08-05 20:57:33

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Java中Json字符串直接转换为对象办法(包括多层List集合)

Java|java教程

json 字符串 list

Java-java教程

使用到的类:net.sf.json.JSONObject

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使用JSON时,除了要导入JSON网站上面下载的json-lib-2.2-jdk15.jar包之外,还必须有其它几个依赖包:commons-beanutils.jar,commons-httpclient.jar,commons-lang.jar,ezmorph.jar,morph-1.0.1.jar

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下面是例子代码:

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// JSON转换JSONObject jsonObj = JSONObject.fromObject(jsonStrBody); Map classMap = new HashMap();classMap.put("results", WeatherBean_Baidu_City.class);classMap.put("index", WeatherBean_Baidu_City_Index.class);classMap.put("weather_data", WeatherBean_Baidu_City_Weatherdata.class); // 将JSON转换成WeatherBean_BaiduWeatherBean_Baidu weather = (WeatherBean_Baidu) JSONObject.toBean(jsonObj,WeatherBean_Baidu.class, classMap);System.out.println(weather.getResults());

使用到的几个JAVA类代码:

package com.lenovo.conference.entity.vo; import java.io.Serializable;import java.util.List; /** * 天气Bean * * @author SHANHY * */@SuppressWarnings("serial")public class WeatherBean_Baidu implements Serializable {private String error;//错误号 private String status;//状态值 private String date;//日期 private List results;//城市天气预报集合(因为一次可以查询多个城市)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 getResults() { return results; }public void setResults(List results) { this.results = results; } }

package com.lenovo.conference.entity.vo; import java.io.Serializable;import java.util.List; /** * 天气Bean * * @author SHANHY * */@SuppressWarnings("serial")public class WeatherBean_Baidu_City implements Serializable {private String currentCity;//城市名称 private String pm25;//pm2.5值 private List index;//指数集合 private List weather_data;//几天的天气集合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 getIndex() { return index; }public void setIndex(List index) { this.index = index; }public List getWeather_data() { return weather_data; }public void setWeather_data( List weather_data) { this.weather_data = weather_data; } }

package com.lenovo.conference.entity.vo; import java.io.Serializable; /** * 天气Bean * * @author SHANHY * */@SuppressWarnings("serial")public class WeatherBean_Baidu_City_Weatherdata implements Serializable {private String date;// 日期 private String dayPictureUrl;// 白天的天气图片 private String nightPictureUrl;// 晚上的天气图片 private String weather;// 天气 private String wind;// 风向 private String temperature;// 温度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; /** * 天气Bean * * @author SHANHY * */@SuppressWarnings("serial")public class WeatherBean_Baidu_City_Index implements Serializable {private String title;//标题 private String zs;//舒适度 private String tipt;//指数简述 private String des;//指数概述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; } }

例子中解析所对应的JSON字符串

{"error":0,"status":"success","date":"-01-15","results":[{"currentCity":"南京","pm25":"83","index":[{"title":"穿衣","zs":"较冷","tipt":"穿衣指数","des":"建议着厚外套加毛衣等服装。年老体弱者宜着大衣、呢外套加羊毛衫。"},{"title":"洗车","zs":"较适宜","tipt":"洗车指数","des":"较适宜洗车,未来一天无雨,风力较小,擦洗一新的汽车至少能保持一天。"},{"title":"旅游","zs":"适宜","tipt":"旅游指数","des":"天气较好,气温稍低,会感觉稍微有点凉,不过也是个好天气哦。适宜旅游,可不要错过机会呦!"},{"title":"感冒","zs":"少发","tipt":"感冒指数","des":"各项气象条件适宜,无明显降温过程,发生感冒机率较低。"},{"title":"运动","zs":"较不宜","tipt":"运动指数","des":"阴天,且天气寒冷,推荐您在室内进行低强度运动;若坚持户外运动,请选择合适的运动并注意保暖。"},{"title":"紫外线强度","zs":"最弱","tipt":"紫外线强度指数","des":"属弱紫外线辐射天气,无需特别防护。若长期在户外,建议涂擦SPF在8-12之间的防晒护肤品。"}],"weather_data":[{"date":"周四 01月15日 (实时:6℃)","dayPictureUrl":"http://api./images/weather/day/yin.jpg","nightPictureUrl":"http://api./images/weather/night/duoyun.jpg","weather":"阴转多云","wind":"北风微风","temperature":"8 ~ 4℃"},{"date":"周五","dayPictureUrl":"http://api./images/weather/day/duoyun.jpg","nightPictureUrl":"http://api./images/weather/night/qing.jpg","weather":"多云转晴","wind":"西北风3-4级","temperature":"12 ~ 0℃"},{"date":"周六","dayPictureUrl":"http://api./images/weather/day/qing.jpg","nightPictureUrl":"http://api./images/weather/night/duoyun.jpg","weather":"晴转多云","wind":"东北风3-4级","temperature":"8 ~ 0℃"},{"date":"周日","dayPictureUrl":"http://api./images/weather/day/qing.jpg","nightPictureUrl":"http://api./images/weather/night/qing.jpg","weather":"晴","wind":"西风微风","temperature":"10 ~ -1℃"}]},{"currentCity":"徐州","pm25":"154","index":[{"title":"穿衣","zs":"较冷","tipt":"穿衣指数","des":"建议着厚外套加毛衣等服装。年老体弱者宜着大衣、呢外套加羊毛衫。"},{"title":"洗车","zs":"较适宜","tipt":"洗车指数","des":"较适宜洗车,未来一天无雨,风力较小,擦洗一新的汽车至少能保持一天。"},{"title":"旅游","zs":"适宜","tipt":"旅游指数","des":"天气较好,但丝毫不会影响您出行的心情。温度适宜又有微风相伴,适宜旅游。"},{"title":"感冒","zs":"较易发","tipt":"感冒指数","des":"天气较凉,较易发生感冒,请适当增加衣服。体质较弱的朋友尤其应该注意防护。"},{"title":"运动","zs":"较不宜","tipt":"运动指数","des":"天气较好,但考虑天气寒冷,推荐您进行各种室内运动,若在户外运动请注意保暖并做好准备活动。"},{"title":"紫外线强度","zs":"最弱","tipt":"紫外线强度指数","des":"属弱紫外线辐射天气,无需特别防护。若长期在户外,建议涂擦SPF在8-12之间的防晒护肤品。"}],"weather_data":[{"date":"周四 01月15日 (实时:6℃)","dayPictureUrl":"http://api./images/weather/day/duoyun.jpg","nightPictureUrl":"http://api./images/weather/night/duoyun.jpg","weather":"多云","wind":"南风微风","temperature":"10 ~ 3℃"},{"date":"周五","dayPictureUrl":"http://api./images/weather/day/duoyun.jpg","nightPictureUrl":"http://api./images/weather/night/duoyun.jpg","weather":"多云","wind":"北风3-4级","temperature":"11 ~ -4℃"},{"date":"周六","dayPictureUrl":"http://api./images/weather/day/duoyun.jpg","nightPictureUrl":"http://api./images/weather/night/duoyun.jpg","weather":"多云","wind":"东风微风","temperature":"6 ~ -4℃"},{"date":"周日","dayPictureUrl":"http://api./images/weather/day/duoyun.jpg","nightPictureUrl":"http://api./images/weather/night/duoyun.jpg","weather":"多云","wind":"西风3-4级","temperature":"11 ~ -1℃"}]}]}

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