/**

 * FastJson常用帮助类

 * @author huangxincheng

 *

 */

public class FastJsonUtil {

private static final SerializeConfig CONFIG = new SerializeConfig();

private static final String FORMAT_TIME = "yyyy-MM-dd HH:mm:ss";

private static final String FORMAT_DATE = "yyyy-MM-dd";

private static final SerializerFeature[] FEATURES = {

SerializerFeature.WriteMapNullValue,

SerializerFeature.WriteDateUseDateFormat,

SerializerFeature.WriteNullListAsEmpty

}; 

// WriteMapNullValue

// WriteDateUseDateFormat

static {

CONFIG.put(Date.class, new SimpleDateFormatSerializer(FORMAT_TIME));

}

public static <T> T parseObject(String json, Class<T> clazz) {

try {

T t = JSON.parseObject(json, clazz);

return t;

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static <T> List<T> parseList(String json, Class<T> clazz) {

try {

List<T> list = JSON.parseArray(json, clazz);

return list;

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

/**

* 某人转为yyyy-MM-dd HH:mm:ss格式

* @param object

* @return

*/

public static String toJson(Object object) {

try {

String json = JSON.toJSONString(object, CONFIG, FEATURES);

return json;

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static JSONObject getAsJSONObjectFromObject(String json, String key) {

try {

JSONObject jsonObject = JSON.parseObject(json);

return jsonObject.getJSONObject(key);

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static JSONArray getAsJSONArrayFromObject(String json, String key) {

try {

JSONObject jsonObject = JSON.parseObject(json);

return jsonObject.getJSONArray(key);

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static String getAsStringFromObject(String json, String key) {

try {

JSONObject jsonObject = JSON.parseObject(json);

return jsonObject.getString(key);

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static Integer getAsIntegerFromObject(String json, String key) {

try {

JSONObject jsonObject = JSON.parseObject(json);

return jsonObject.getInteger(key);

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static Long getAsLongFromObject(String json, String key) {

try {

JSONObject jsonObject = JSON.parseObject(json);

return jsonObject.getLong(key);

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static Double getAsDoubleFromObject(String json, String key) {

try {

JSONObject jsonObject = JSON.parseObject(json);

return jsonObject.getDouble(key);

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static Boolean getAsBooleanFromObject(String json, String key) {

try {

JSONObject jsonObject = JSON.parseObject(json);

return jsonObject.getBoolean(key);

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static Short getAsShortFromObject(String json, String key) {

try {

JSONObject jsonObject = JSON.parseObject(json);

return jsonObject.getShort(key);

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static Byte getAsByteFromObject(String json, String key) {

try {

JSONObject jsonObject = JSON.parseObject(json);

return jsonObject.getByte(key);

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static <T> T getAsObjectFromObject(String json, String key, Class<T> clazz) {

try {

JSONObject jsonObject = JSON.parseObject(json);

return jsonObject.getObject(key, clazz);

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static <T> List<T> getAsListFromObject(String json, String key, Class<T> clazz) {

try {

JSONObject jsonObject = JSON.parseObject(json);

JSONArray jsonArray = jsonObject.getJSONArray(key);

return jsonArray.toJavaList(clazz);

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static <T> T  toJavaObject(JSONObject jsonObject, Class<T> clazz) {

try {

T t = jsonObject.toJavaObject(clazz);

return t;

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static <T> List<T> toJavaList(JSONArray jsonArray, Class<T> clazz) {

try {

List<T> list = jsonArray.toJavaList(clazz);

return list;

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static JSONObject parseJSONObject(Object object) {

try {

return JSON.parseObject(toJson(object));

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static JSONArray parseJSONArray(Object object) {

try {

return JSON.parseArray(toJson(object));

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

//解决泛型问题 不能强制转换的方法

public static <T> T generateAssignObject(Object source, Class<T> clazz) {

try {

T t = toJavaObject(parseJSONObject(source), clazz);

return t;

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

//解决泛型问题 不能强制转换的方法

public static <T> List<T> generateAssignList(Object source, Class<T> clazz) {

try {

List<T> list = toJavaList(parseJSONArray(source), clazz);

return list;

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

}

本文出自 “12265610” 博客，谢绝转载！

对FastJson的封装Util