JsonUtil工具类

package com.example.jsonutil;import java.lang.reflect.Field;import java.lang.reflect.Method;import java.math.BigDecimal;import java.util.ArrayList;import java.util.List;import java.util.Locale; import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;public class JsonUtil {  public static <T> List<T> parseJson(Class<T> clzz, String jsonObjArray) {List<T> modelVOList = new ArrayList<T>(); try {JSONArray jsonArray = new JSONArray(jsonObjArray);if (jsonArray != null && jsonArray.length() > 0) {for (int i = 0; i < jsonArray.length(); i++) { T object = null;try {object = clzz.newInstance();} catch (IllegalAccessException e1) { e1.printStackTrace();} catch (InstantiationException e1) { e1.printStackTrace();}JSONObject obj = jsonArray.getJSONObject(i); Field[] fields = object.getClass().getDeclaredFields();for (int j = 0; j < fields.length; j++) {String fieldName = fields[j].getName();String typeName = fields[j].getType().getCanonicalName().substring(fields[j].getType().getCanonicalName().lastIndexOf(".") + 1);Method jsonObjGetMethod = null;Method vehicleVOSetMethod = null;try {String jsonGetMethodName = "get" + typeName;if ("Integer".equals(typeName) || "BigDecimal".equals(typeName)) {jsonGetMethodName = "getInt";} String firstChar = String.valueOf(fieldName.toUpperCase(Locale.US).charAt(0));String vehicleVOSetMethodName = "set" + firstChar + fieldName.substring(1);jsonObjGetMethod = obj.getClass().getDeclaredMethod(jsonGetMethodName, new Class[]{String.class});vehicleVOSetMethod = object.getClass().getDeclaredMethod(vehicleVOSetMethodName, new Class[]{fields[j].getType()});Object valueObject = jsonObjGetMethod.invoke(obj, new Object[]{fieldName});if (valueObject instanceof String) {vehicleVOSetMethod.invoke(object, new String[]{(String)valueObject});} else if (valueObject instanceof Long) {vehicleVOSetMethod.invoke(object, new Long[]{(Long)valueObject});} else if (valueObject instanceof Double) {vehicleVOSetMethod.invoke(object, new Double[]{(Double)valueObject});} else if (valueObject instanceof Integer) {vehicleVOSetMethod.invoke(object, new Integer[]{(Integer)valueObject});} else if (valueObject instanceof BigDecimal) {vehicleVOSetMethod.invoke(object, new BigDecimal[]{(BigDecimal)valueObject});}  } catch (SecurityException e) { e.printStackTrace();} catch (NoSuchMethodException e) { e.printStackTrace();} catch (Exception e) {e.printStackTrace();} } modelVOList.add(object);}}} catch (JSONException e) {e.printStackTrace();} return modelVOList;} }

People people = new People();people.setId("111");people.setAge(12);people.setName("zhelong");people.setWeight(111.2);List<People> peopleList = new ArrayList<People>();peopleList.add(people);peopleList.add(people);peopleList.add(people); Gson gson = new Gson();String jsonString = gson.toJson(peopleList);List<People> peoples = JsonUtil.parseJson(People.class, jsonString);for (People p : peoples) {System.out.println(p.getId());System.out.println(p.getName());System.out.println(p.getWeight());System.out.println(p.getAge());System.out.println("------------------------------");}