public static String toJSONString(Object obj) {JSONObject json = new JSONObject();try {Map<String, String> map = beanToMap(obj);for (Map.Entry<String, String> entry : map.entrySet()) {json.put(entry.getKey(), entry.getValue());}} catch (JSONException e) {e.printStackTrace();}return json.toString();}    /*** 将bean转换成Map* * @param bean* @return*/public static Map<String, String> beanToMap(Object bean) {if (bean == null) {return null;}Map<String, String> parameters = new HashMap<String, String>();if (null != parameters) {// 取得bean所有public 方法Method[] Methods = bean.getClass().getMethods();for (Method method : Methods) {if (method != null && method.getName().startsWith("get")&& !method.getName().startsWith("getClass")) {// 得到属性的类名String value = "";// 得到属性值try {String className = method.getReturnType().getSimpleName();if (className.equalsIgnoreCase("int")) {int val = 0;try {val = (Integer) method.invoke(bean);} catch (InvocationTargetException e) {e.printStackTrace();}value = String.valueOf(val);} else if (className.equalsIgnoreCase("String")) {try {value = (String) method.invoke(bean);} catch (InvocationTargetException e) {e.printStackTrace();}}if (value != null && value != "") {// 添加参数// 将方法名称转化为id，去除get，将方法首字母改为小写String param = method.getName().replaceFirst("get","");if (param.length() > 0) {String first = String.valueOf(param.charAt(0)).toLowerCase();param = first + param.substring(1);}parameters.put(param, value);}} catch (IllegalArgumentException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();}}}}return parameters;}