利用泛型和反射对Java对象集合转换成Json的工具类

转载请注明出处：http://blog.csdn.net/ylp_boy/article/details/44652107

//T是实际调用时传入的实体的类型

public static <T> String entityListToJson(List<T> list)throws NoSuchMethodException, SecurityException,IllegalAccessException, IllegalArgumentException,InvocationTargetException{

if (list == null || list.size() == 0){

return "{}";

}

StringBuffer sb = new StringBuffer();

sb.append("[");

for (T t : list){

sb.append("{");

//获取到T的所有属性

for (Field field : t.getClass().getDeclaredFields()){

if (!"serialVersionUID".endsWith(field.getName())){

String fieldName="get" + field.getName().substring(0,1).toUpperCase()+ field.getName().substring(1);

sb.append("\""+ field.getName()+ "\":\""

+ t.getClass().getMethod(fieldName, null)

.invoke(t) + "\",");

}

}

sb.deleteCharAt(sb.length() - 1).append("},");

}

return StringUtils.removeEnd(sb.toString(), ",") + "]";

}