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);
    }
}