使用到的类：net.sf.json.JSONObject

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

下面是例子代码：

// 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_Baidu

WeatherBean_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":"2015-01-15","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.map.baidu.com/images/weather/day/yin.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/duoyun.png","weather":"阴转多云","wind":"北风微风","temperature":"8 ~ 4℃"},{"date":"周五","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/qing.png","weather":"多云转晴","wind":"西北风3-4级","temperature":"12 ~ 0℃"},{"date":"周六","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/qing.png","weather":"晴转多云","wind":"东北风3-4级","temperature":"8 ~ 0℃"},{"date":"周日","weather":"晴","wind":"西风微风","temperature":"10 ~ -1℃"}]},{"currentCity":"徐州","pm25":"154","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。"},"zs":"较易发","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。"},"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。"},"weather":"多云","wind":"南风微风","temperature":"10 ~ 3℃"},"wind":"北风3-4级","temperature":"11 ~ -4℃"},"wind":"东风微风","temperature":"6 ~ -4℃"},"wind":"西风3-4级","temperature":"11 ~ -1℃"}]}]}

以上这篇Java中Json字符串直接转换为对象的方法(包括多层List集合)就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持编程小技巧。

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