JSON解析工具类

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import java.util.ArrayList;import java.util.HashMap;import java.util.Iterator;import java.util.List;import java.util.Map;import net.sf.json.JSONArray;import net.sf.json.JSONObject;/** * @author jsczxy2 * JSON解析类 */public class JsonUtil {/** * 从一个JSON 对象字符格式中得到一个java对象 *  * @param jsonString * @param pojoCalss * @return */public static Object getObject4JsonString(String jsonString, Class pojoCalss) {Object pojo;JSONObject jsonObject = JSONObject.fromObject(jsonString);pojo = JSONObject.toBean(jsonObject, pojoCalss);return pojo;}/** * 从json HASH表达式中获取一个map，改map支持嵌套功能 *  * @param jsonString * @return */public static Map getMap4Json(String jsonString) {JSONObject jsonObject = JSONObject.fromObject(jsonString);Iterator keyIter = jsonObject.keys();String key;Object value;Map valueMap = new HashMap();while (keyIter.hasNext()) {key = (String) keyIter.next();value = jsonObject.get(key).toString();valueMap.put(key, value);}return valueMap;}/** * 从json数组中得到相应java数组 *  * @param jsonString * @return */public static Object[] getObjectArray4Json(String jsonString) {JSONArray jsonArray = JSONArray.fromObject(jsonString);return jsonArray.toArray();}/** * 从json对象集合表达式中得到一个java对象列表 *  * @param jsonString * @param pojoClass * @return */public static List getList4Json(String jsonString, Class pojoClass) {JSONArray jsonArray = JSONArray.fromObject(jsonString);JSONObject jsonObject;Object pojoValue;List list = new ArrayList();for (int i = 0; i < jsonArray.size(); i++) {jsonObject = jsonArray.getJSONObject(i);pojoValue = JSONObject.toBean(jsonObject, pojoClass);list.add(pojoValue);}return list;}/** * 从json数组中解析出java字符串数组 *  * @param jsonString * @return */public static String[] getStringArray4Json(String jsonString) {JSONArray jsonArray = JSONArray.fromObject(jsonString);String[] stringArray = new String[jsonArray.size()];for (int i = 0; i < jsonArray.size(); i++) {stringArray[i] = jsonArray.getString(i);}return stringArray;}/** * 从json数组中解析出javaLong型对象数组 *  * @param jsonString * @return */public static Long[] getLongArray4Json(String jsonString) {JSONArray jsonArray = JSONArray.fromObject(jsonString);Long[] longArray = new Long[jsonArray.size()];for (int i = 0; i < jsonArray.size(); i++) {longArray[i] = jsonArray.getLong(i);}return longArray;}/** * 从json数组中解析出java Integer型对象数组 *  * @param jsonString * @return */public static Integer[] getIntegerArray4Json(String jsonString) {JSONArray jsonArray = JSONArray.fromObject(jsonString);Integer[] integerArray = new Integer[jsonArray.size()];for (int i = 0; i < jsonArray.size(); i++) {integerArray[i] = jsonArray.getInt(i);}return integerArray;}/** * 从json数组中解析出java Integer型对象数组 *  * @param jsonString * @return */public static Double[] getDoubleArray4Json(String jsonString) {JSONArray jsonArray = JSONArray.fromObject(jsonString);Double[] doubleArray = new Double[jsonArray.size()];for (int i = 0; i < jsonArray.size(); i++) {doubleArray[i] = jsonArray.getDouble(i);}return doubleArray;}/** * 将java对象转换成json字符串 *  * @param javaObj * @return */public static String getJsonString4JavaPOJO(Object javaObj) {JSONObject json;json = JSONObject.fromObject(javaObj);return json.toString();}}