mobi.cangol.mobile.parser.JsonUtils Maven / Gradle / Ivy
/**
* Copyright (c) 2013 Cangol
*
* Licensed under the Apache License, Version 2.0 (the "License")
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package mobi.cangol.mobile.parser;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import mobi.cangol.mobile.logging.Log;
/**
* @author Cangol
*/
public class JsonUtils extends Converter {
private static final String TAG = "JsonUtils";
public static final String UTF_8 = "utf-8";
private JsonUtils() {
}
/**
* 转换Object到JSONArray
*
* @param
* @param obj
* @return
*/
public static JSONArray toJSONArray(List obj, boolean useAnnotation) {
final JSONArray jsonArray = new JSONArray();
if (obj != null) {
for (int i = 0; i < obj.size(); i++) {
if (isBaseClass(obj.get(i).getClass())) {
jsonArray.put(obj.get(i));
} else {
jsonArray.put(toJSONObject(obj.get(i), useAnnotation));
}
}
}
return jsonArray;
}
/**
* 转换Object到JSONObject
*
* @param
* @param obj
* @return
*/
public static JSONObject toJSONObject(T obj, boolean useAnnotation) {
if (obj == null) {
return null;
}
if (List.class.isAssignableFrom(obj.getClass())) {
return null;
}
final JSONObject json = new JSONObject();
final Field[] fields = obj.getClass().getDeclaredFields();
try {
for (final Field field : fields) {
field.setAccessible(true);
if (field.isEnumConstant() || Modifier.isFinal(field.getModifiers()) || Modifier.isTransient(field.getModifiers())) {
continue;
}
final String filedName = getFieldName(field, useAnnotation);
if (!List.class.isAssignableFrom(field.getType())) {
//非集合类型
if (isBaseClass(field.getType())) {
json.put(filedName, field.get(obj));
} else {
json.put(filedName, toJSONObject(field.get(obj), useAnnotation));
}
} else {
//集合类型
if (field.getGenericType() instanceof ParameterizedType) {
final List list = (List) field.get(obj);
final JSONArray jsonArray = new JSONArray();
if (list != null) {
for (int i = 0; i < list.size(); i++) {
if (isBaseClass(list.get(i).getClass())) {
jsonArray.put(list.get(i));
} else {
jsonArray.put(toJSONObject(list.get(i), useAnnotation));
}
}
}
json.put(filedName, jsonArray);
} else {
Log.d(TAG, field.getName() + " require have generic");
}
}
}
} catch (Exception e) {
Log.d(TAG, e.getMessage());
}
return json;
}
/**
* 解析JSONObject格式字符串到 Object
*
* @param c
* @param str
* @param useAnnotation
* @param
* @return
* @throws JSONParserException
*/
public static T parserToObject(Class c, String str, boolean useAnnotation) throws JSONParserException {
if (null == str || "".equals(str)) {
throw new IllegalArgumentException("str=null");
}
final String json = formatJson(str);
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject(json);
} catch (JSONException e) {
throw new JSONParserException(e.getMessage(), e);
}
return parserToObject(c, jsonObject, useAnnotation);
}
/**
* 解析JSONArray格式字符串到 List
*
* @param c
* @param str
* @param useAnnotation
* @param
* @return
* @throws JSONParserException
*/
public static List parserToList(Class c, String str, boolean useAnnotation) throws JSONParserException {
if (null == str || "".equals(str)) {
throw new IllegalArgumentException("str=null");
}
final String json = formatJson(str);
JSONArray jsonArray = null;
try {
jsonArray = new JSONArray(json);
} catch (JSONException e) {
throw new JSONParserException(e.getMessage(), e);
}
return parserToList(c, jsonArray, useAnnotation);
}
/**
* @param c
* @param urlStr
* @param
* @return
* @throws JSONParserException
*/
public static T parserToObjectByUrl(Class c, String urlStr) throws JSONParserException {
if (null == urlStr || "".equals(urlStr)) {
throw new IllegalArgumentException("urlStr=null");
}
URL url = null;
HttpURLConnection urlConnection = null;
String json = null;
JSONObject jsonObject = null;
try {
url = new URL(urlStr);
urlConnection = (HttpURLConnection) url.openConnection();
json = formatJson(inputStreamTOString(urlConnection.getInputStream()));
jsonObject = new JSONObject(json);
} catch (Exception e) {
throw new JSONParserException(e.getMessage(), e);
}
return parserToObject(c, jsonObject, true);
}
private static String inputStreamTOString(InputStream in) throws Exception {
final ByteArrayOutputStream outStream = new ByteArrayOutputStream();
final byte[] data = new byte[4096];
int count = -1;
while ((count = in.read(data, 0, 4096)) != -1) {
outStream.write(data, 0, count);
}
return new String(outStream.toByteArray(), UTF_8);
}
public static T parserToObject(Class c, JSONObject jsonObject, boolean useAnnotation) throws JSONParserException {
if (jsonObject == null) {
return null;
}
T t = null;
try {
final Map typeMap = new HashMap<>();
final Constructor constructor = c.getDeclaredConstructor();
constructor.setAccessible(true);
t = (T) constructor.newInstance();
final Field[] fields = c.getDeclaredFields();
String filedName = null;
for (final Field field : fields) {
field.setAccessible(true);
if (field.isEnumConstant() || Modifier.isFinal(field.getModifiers()) || Modifier.isTransient(field.getModifiers())) {
continue;
}
filedName = getFieldName(field, useAnnotation);
if (!List.class.isAssignableFrom(field.getType())) {
Class filedClass = null;
if (field.getGenericType() instanceof TypeVariable) {
final TypeVariable aType = (TypeVariable) field.getGenericType();
filedClass = typeMap.get(aType.getName());
} else {
filedClass = field.getType();
}
if (jsonObject.has(filedName))
field.set(t, getValueFromJson(t, filedClass, filedName, jsonObject, useAnnotation));
} else {
if (field.getGenericType() instanceof ParameterizedType) {
final ParameterizedType pt = (ParameterizedType) field.getGenericType();
final Class genericClazz = (Class) pt.getActualTypeArguments()[0];
final List list = parserToList(genericClazz, getJSONArray(jsonObject, filedName), useAnnotation);
field.set(t, list);
} else {
Log.i(TAG, field.getName() + " require have generic");
}
}
}
} catch (Exception e) {
throw new JSONParserException(c, "constructor is not accessible,must have zero-argument constructor", e);
}
return t;
}
@SuppressWarnings("unchecked")
public static List parserToList(Class c, JSONArray jsonArray, boolean useAnnotation) throws JSONParserException {
if (jsonArray == null) {
return new ArrayList<>();
}
final List list = new ArrayList<>();
T t = null;
for (int i = 0; i < jsonArray.length(); i++) {
try {
if (jsonArray.get(i) instanceof JSONObject) {
t = parserToObject(c, jsonArray.getJSONObject(i), useAnnotation);
} else if (jsonArray.get(i) != null) {
t = (T) jsonArray.get(i);
} else {
continue;
}
list.add(t);
} catch (JSONException e) {
throw new JSONParserException("Illegal Argument value=", e);
}
}
return list;
}
private static Object getValueFromJson(T t, Class fieldClass, String key, JSONObject jsonObject, boolean useAnnotation) {
Object value = null;
try {
if (isBaseClass(fieldClass)) {
if (fieldClass == String.class) {
value = getString(jsonObject, key);
} else if (fieldClass == Integer.class || fieldClass == int.class) {
value = getInt(jsonObject, key, 0);
} else if (fieldClass == Long.class || fieldClass == long.class) {
value = getLong(jsonObject, key, 0L);
} else if (fieldClass == Double.class || fieldClass == double.class) {
value = getDouble(jsonObject, key, 0.0d);
} else if (fieldClass == Boolean.class || fieldClass == boolean.class) {
value = getBoolean(jsonObject, key, false);
} else if (fieldClass == Float.class || fieldClass == float.class) {
value = getFloat(jsonObject, key, 0.0f);
}
} else {
value = parserToObject(fieldClass, getJSONObject(jsonObject, key), useAnnotation);
}
} catch (IllegalArgumentException e) {
throw new JSONParserException(t.getClass(), "Illegal Argument value=" + value, e);
} finally {
return value;
}
}
public static ParameterizedType getType(final Class raw, final Type... args) {
return new ParameterizedType() {
public Type getRawType() {
return raw;
}
public Type[] getActualTypeArguments() {
return args;
}
public Type getOwnerType() {
return null;
}
};
}
public static String formatJson(String json) {
if (null != json && json.startsWith("{\"\"")) {
json = json.replaceFirst("\"\"", "\"");
}
return json;
}
public static JSONObject formatJSONObject(String json) throws JSONException {
if (null != json && json.startsWith("{\"\"")) {
json = json.replaceFirst("\"\"", "\"");
}
return new JSONObject(json);
}
public static int getInt(JSONObject obj, String key, int defaultValue) {
try {
if (obj.isNull(key)) {
return defaultValue;
} else {
return obj.getInt(key);
}
} catch (JSONException e) {
return defaultValue;
}
}
public static long getLong(JSONObject obj, String key, long defaultValue) {
try {
if (obj.isNull(key)) {
return defaultValue;
} else {
return obj.getLong(key);
}
} catch (JSONException e) {
return defaultValue;
}
}
public static boolean getBoolean(JSONObject obj, String key, boolean defaultValue) {
try {
if (obj.isNull(key)) {
return defaultValue;
} else {
return obj.getBoolean(key);
}
} catch (JSONException e) {
return defaultValue;
}
}
public static float getFloat(JSONObject obj, String key, float defaultValue) {
String floatStr = null;
try {
floatStr = "" + obj.get(key);
return Float.valueOf(floatStr);
} catch (JSONException e) {
return defaultValue;
}
}
public static double getDouble(JSONObject obj, String key, double defaultValue) {
try {
if (obj.isNull(key)) {
return defaultValue;
} else {
return obj.getDouble(key);
}
} catch (JSONException e) {
return defaultValue;
}
}
public static String getString(JSONObject obj, String key) {
try {
if (obj.isNull(key)) {
return null;
} else {
return obj.getString(key);
}
} catch (JSONException e) {
return null;
}
}
public static String getString(JSONObject obj, String key, String defaultValue) {
try {
if (obj.isNull(key)) {
return defaultValue;
} else {
return obj.getString(key);
}
} catch (JSONException e) {
return defaultValue;
}
}
public static Object getObject(JSONObject obj, String key) {
try {
if (obj.isNull(key)) {
return null;
} else {
return obj.get(key);
}
} catch (JSONException e) {
return null;
}
}
public static JSONObject getObject(String json) {
try {
return new JSONObject(formatJson(json));
} catch (JSONException e) {
return null;
}
}
public static JSONObject getJSONObject(JSONObject obj, String key) {
try {
if (obj.isNull(key)) {
return null;
} else {
return obj.getJSONObject(key);
}
} catch (JSONException e) {
return null;
}
}
public static JSONArray getJSONArray(JSONObject obj, String key) {
try {
if (obj.isNull(key)) {
return null;
} else {
return obj.getJSONArray(key);
}
} catch (JSONException e) {
return null;
}
}
}