Gson解析

Eg：

****{    "state": "00",    "monitor_id": "201411001",    "monitor_name": "1",    "dispatchtime": "",    "monitorstate": "",    "monitordes": "",    "results": [        {            "turbidity": [                {                    "turbidity": "23424",                    "turbidity_time": "20160708 12:00:00"                },                {                    "turbidity": "356456",                    "turbidity_time": "20160709 12:00:00"                }            ],            "chlorinedioxide": [                {                    " chlorinedioxide ": "23424",                    " chlorinedioxide_time ": "20160708 12:00:00"                },                {                    " chlorinedioxide ": "899489",                    " chlorinedioxide_time ": "20160710 12:00:00"                }            ]        }    ]}{    "state": "00",    "monitor_id": "201411001",    "monitor_name": "1",    "dispatchtime": "",    "monitorstate": "",    "monitordes": "",    "data": [        {            "turbidity": [                {                    "turbidity": "23424",                    "turbidity_time": "20160708 12:00:00"                },                {

解析

对于这个Json，要先建三层的Bean类，具体代码如下：

第一层

package com.li.json;import java.util.List;public class HistoryDataBean {    private String state;    private String monitor_id;    private String monitor_name;    private String dispatchtime;    private String monitorstate;    private String monitordes;    private List<Data> data;    public String getState() {        return state;    }    public void setState(String state) {        this.state = state;    }    public String getMonitor_id() {        return monitor_id;    }    public void setMonitor_id(String monitor_id) {        this.monitor_id = monitor_id;    }    public String getMonitor_name() {        return monitor_name;    }    public void setMonitor_name(String monitor_name) {        this.monitor_name = monitor_name;    }    public String getDispatchtime() {        return dispatchtime;    }    public void setDispatchtime(String dispatchtime) {        this.dispatchtime = dispatchtime;    }    public String getMonitorstate() {        return monitorstate;    }    public void setMonitorstate(String monitorstate) {        this.monitorstate = monitorstate;    }    public String getMonitordes() {        return monitordes;    }    public void setMonitordes(String monitordes) {        this.monitordes = monitordes;    }    public List<Data> getData() {        return data;    }    public void setData(List<Data> data) {        this.data = data;    }     @Override          public String toString()                {                  return "Status [state=" + state + ", monitor_id=" + monitor_id                          + ", monitor_name=" + monitor_name + ", dispatchtime=" + dispatchtime                         + ", monitorstate=" + monitorstate + ", monitordes=" + monitordes                         + ", data=" + data + "]";               } }

第二层

package com.li.json;import java.util.List;public class Data {    private List<Turbidity> turbidity;    private List<Chlorinedioxide> chlorinedioxides;    public List<Turbidity> getTurbidity() {        return turbidity;    }    public void setTurbidity(List<Turbidity> turbidity) {        this.turbidity = turbidity;    }    public List<Chlorinedioxide> getChlorinedioxides() {        return chlorinedioxides;    }    public void setChlorinedioxides(List<Chlorinedioxide> chlorinedioxides) {        this.chlorinedioxides = chlorinedioxides;    }    @Override    public String toString() {        return "Data [turbidity"+turbidity +",chlorinedioxides"+chlorinedioxides+"]";    }}

第三层

package com.li.json;public class Turbidity {  private String turbidity;  private String turbidity_time;public String getTurbidity() {    return turbidity;}public void setTurbidity(String turbidity) {    this.turbidity = turbidity;}public String getTurbidity_time() {    return turbidity_time;}public void setTurbidity_time(String turbidity_time) {    this.turbidity_time = turbidity_time;}@Overridepublic String toString() {    return "Turbidity [turbidity"+turbidity +",turbidity_time"+turbidity_time+"]";}}package com.li.json;public class Chlorinedioxide {    private String chlorinedioxide;    private String chlorinedioxide_time;    public String getChlorinedioxide() {        return chlorinedioxide;    }    public void setChlorinedioxide(String chlorinedioxide) {        this.chlorinedioxide = chlorinedioxide;    }    public String getChlorinedioxide_time() {        return chlorinedioxide_time;    }    public void setChlorinedioxide_time(String chlorinedioxide_time) {        this.chlorinedioxide_time = chlorinedioxide_time;    }    @Override    public String toString() {        return "Chlorinedioxide [chlorinedioxide"+chlorinedioxide +",chlorinedioxide_time"+chlorinedioxide_time+"]";    }}

接下来一切都简单了

/*建一个Gson对象*/Gson gson=new Gson();    HistoryDataBean bean=gson.fromJson(toJson(), HistoryDataBean.class);    /*接下来想要什么数据都可以直接提取了，如下想要获取第一组数据二氧化硫的时间：*/    System.out.println(bean.getData().get(0).getChlorinedioxides().get(0).getChlorinedioxide_time());