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JSON.java
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/*Copyright (C) 2020 THL A29 Limited, a Tencent company. All rights reserved.
This source code is licensed under the Apache License Version 2.0.*/
package apijson;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.parser.Feature;
import com.alibaba.fastjson.serializer.SerializerFeature;
import java.util.List;
/**阿里FastJSON封装类 防止解析时异常
* @author Lemon
*/
public class JSON {
private static final String TAG = "JSON";
/**判断json格式是否正确
* @param s
* @return
*/
public static boolean isJsonCorrect(String s) {
//太长 Log.i(TAG, "isJsonCorrect <<<< " + s + " >>>>>>>");
if (s == null
// || s.equals("[]")
// || s.equals("{}")
|| s.equals("")
|| s.equals("[null]")
|| s.equals("{null}")
|| s.equals("null")) {
return false;
}
return true;
}
/**获取有效的json
* @param s
* @return
*/
public static String getCorrectJson(String s) {
return getCorrectJson(s, false);
}
/**获取有效的json
* @param s
* @param isArray
* @return
*/
public static String getCorrectJson(String s, boolean isArray) {
s = StringUtil.getTrimedString(s);
// if (isArray) {
// while (s.startsWith("\"")) {
// s = s.substring(1);
// }
// while (s.endsWith("\"")) {
// s = s.substring(0, s.length() - 1);
// }
// }
return s;//isJsonCorrect(s) ? s : null;
}
/**
* @param json
* @return
*/
private static final Feature[] DEFAULT_FASTJSON_FEATURES = {Feature.OrderedField, Feature.UseBigDecimal};
public static Object parse(Object obj) {
try {
return com.alibaba.fastjson.JSON.parse(obj instanceof String ? (String) obj : toJSONString(obj), DEFAULT_FASTJSON_FEATURES);
} catch (Exception e) {
Log.i(TAG, "parse catch \n" + e.getMessage());
}
return null;
}
/**obj转JSONObject
* @param obj
* @return
*/
public static JSONObject parseObject(Object obj) {
if (obj instanceof JSONObject) {
return (JSONObject) obj;
}
return parseObject(toJSONString(obj));
}
/**json转JSONObject
* @param json
* @return
*/
public static JSONObject parseObject(String json) {
return parseObject(json, JSONObject.class);
}
/**json转实体类
* @param json
* @param clazz
* @return
*/
public static <T> T parseObject(String json, Class<T> clazz) {
if (clazz == null || StringUtil.isEmpty(json, true)) {
Log.e(TAG, "parseObject clazz == null || StringUtil.isEmpty(json, true) >> return null;");
} else {
try {
return com.alibaba.fastjson.JSON.parseObject(getCorrectJson(json), clazz, DEFAULT_FASTJSON_FEATURES);
} catch (Exception e) {
Log.i(TAG, "parseObject catch \n" + e.getMessage());
}
}
return null;
}
/**list转JSONArray
* @param list
* @return
*/
public static JSONArray parseArray(List<Object> list) {
return new JSONArray(list);
}
/**obj转JSONArray
* @param obj
* @return
*/
public static JSONArray parseArray(Object obj) {
if (obj instanceof JSONArray) {
return (JSONArray) obj;
}
return parseArray(toJSONString(obj));
}
/**json转JSONArray
* @param json
* @return
*/
public static JSONArray parseArray(String json) {
if (StringUtil.isEmpty(json, true)) {
Log.e(TAG, "parseArray StringUtil.isEmpty(json, true) >> return null;");
} else {
try {
return com.alibaba.fastjson.JSON.parseArray(getCorrectJson(json, true));
} catch (Exception e) {
Log.i(TAG, "parseArray catch \n" + e.getMessage());
}
}
return null;
}
/**JSONArray转实体类列表
* @param array
* @param clazz
* @return
*/
public static <T> List<T> parseArray(JSONArray array, Class<T> clazz) {
return parseArray(toJSONString(array), clazz);
}
/**json转实体类列表
* @param json
* @param clazz
* @return
*/
public static <T> List<T> parseArray(String json, Class<T> clazz) {
if (clazz == null || StringUtil.isEmpty(json, true)) {
Log.e(TAG, "parseArray clazz == null || StringUtil.isEmpty(json, true) >> return null;");
} else {
try {
return com.alibaba.fastjson.JSON.parseArray(getCorrectJson(json, true), clazz);
} catch (Exception e) {
Log.i(TAG, "parseArray catch \n" + e.getMessage());
}
}
return null;
}
/**实体类转json
* @param obj
* @return
*/
public static String toJSONString(Object obj) {
if (obj == null) {
return null;
}
if (obj instanceof String) {
return (String) obj;
}
try {
return com.alibaba.fastjson.JSON.toJSONString(obj);
} catch (Exception e) {
Log.e(TAG, "toJSONString catch \n" + e.getMessage());
}
return null;
}
/**实体类转json
* @param obj
* @param features
* @return
*/
public static String toJSONString(Object obj, SerializerFeature... features) {
if (obj == null) {
return null;
}
if (obj instanceof String) {
return (String) obj;
}
try {
return com.alibaba.fastjson.JSON.toJSONString(obj, features);
} catch (Exception e) {
Log.e(TAG, "toJSONString catch \n" + e.getMessage());
}
return null;
}
/**格式化，显示更好看
* @param json
* @return
*/
public static String format(String json) {
return format(parse(json));
}
/**格式化，显示更好看
* @param object
* @return
*/
public static String format(Object object) {
return toJSONString(object, SerializerFeature.PrettyFormat);
}
/**判断是否为JSONObject
* @param obj instanceof String ? parseObject
* @return
*/
public static boolean isJSONObject(Object obj) {
if (obj instanceof JSONObject) {
return true;
}
if (obj instanceof String) {
try {
JSONObject json = parseObject((String) obj);
return json != null && json.isEmpty() == false;
} catch (Exception e) {
Log.e(TAG, "isJSONObject catch \n" + e.getMessage());
}
}
return false;
}
/**判断是否为JSONArray
* @param obj instanceof String ? parseArray
* @return
*/
public static boolean isJSONArray(Object obj) {
if (obj instanceof JSONArray) {
return true;
}
if (obj instanceof String) {
try {
JSONArray json = parseArray((String) obj);
return json != null && json.isEmpty() == false;
} catch (Exception e) {
Log.e(TAG, "isJSONArray catch \n" + e.getMessage());
}
}
return false;
}
/**判断是否为 Boolean,Number,String 中的一种
* @param obj
* @return
*/
public static boolean isBooleanOrNumberOrString(Object obj) {
return obj instanceof Boolean || obj instanceof Number || obj instanceof String;
}
}