JsonUtils

 import net.sf.json.JSONObject;

 public class JsonTools {
     public static JSONObject getJSONObject(String jData) {
         if (jData == null || jData.length() <= 0)
             return null;
         JSONObject obj = JSONObject.fromObject(jData);
         return obj;
     }

     public static <T> String getJsonString(T t) {
         JSONObject obj = JSONObject.fromObject(t);
         return obj.toString();
     }

     public static String getJsonValueByName(JSONObject object, String name) {
         if (object == null)
             return "--";
         String value = object.getString(name);
         if (null == value || "null".equalsIgnoreCase(value))
             value = "";
         return value;
     }

     public static String getJsonValueByName(String jData, String name) {
         if (jData == null || jData.length() <= 0)
             return "";
         JSONObject obj = JSONObject.fromObject(jData);
         String value = obj.getString(name);
         if (null == value || "null".equalsIgnoreCase(value))
             value = "";
         return value;
     }

     public static String getJsonValueNotNull(String jData, String name)
             throws Exception {
         if (jData == null || jData.length() <= 0)
             throw new Exception("获取请求数据[jsonData]为空");
         JSONObject obj = JSONObject.fromObject(jData);
         String value = obj.getString(name).trim();
         if (null == value || value.length() <= 0)
             throw new Exception("获取的数据对象[" + name + "]为空");
         return value;
     }

     @SuppressWarnings({ "rawtypes", "unchecked" })
     public static <T> T getJavaBean(String jData, Class clazz) {

         JSONObject jsonObject = JSONObject.fromObject(jData);
         return (T) JSONObject.toBean(jsonObject, clazz);
     }
 }