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·583 lines (496 loc) · 16.4 KB
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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 java.util.List;
import java.util.Map;
import apijson.orm.exception.UnsupportedDataTypeException;
/**JSON工具类 防止解析时异常
* @author Lemon
*/
public class JSON {
public static Class<?> JSON_OBJECT_CLASS = JSONObject.class;
public static Class<?> JSON_ARRAY_CLASS = JSONArray.class;
static final String TAG = "JSON";
public static JSONParser<? extends Map<String, Object>, ? extends List<Object>> DEFAULT_JSON_PARSER = new JSONParser<JSONObject, JSONArray>() {
@Override
public JSONObject createJSONObject() {
return new JSONObject();
}
@Override
public JSONArray createJSONArray() {
return new JSONArray();
}
@Override
public String toJSONString(Object obj) {
return JSON.toJSONString(obj);
}
@Override
public Object parseJSON(Object json) {
throw new UnsupportedOperationException();
}
@Override
public JSONObject parseObject(Object json) {
throw new UnsupportedOperationException();
}
@Override
public <T> T parseObject(Object json, Class<T> clazz) {
throw new UnsupportedOperationException();
}
@Override
public JSONArray parseArray(Object json) {
throw new UnsupportedOperationException();
}
@Override
public <T> List<T> parseArray(Object json, Class<T> clazz) {
throw new UnsupportedOperationException();
}
};
// public static JSONCreator<? extends Map<String, Object>, ? extends List<Object>> DEFAULT_JSON_CREATOR = DEFAULT_JSON_PARSER;
public static Object createJSONObject() {
return DEFAULT_JSON_PARSER.createJSONObject();
}
public static Object createJSONObject(Map<? extends String, ?> map) {
return DEFAULT_JSON_PARSER.createJSONObject(map);
}
public static Object createJSONArray() {
return DEFAULT_JSON_PARSER.createJSONArray();
}
public static Object createJSONArray(List<?> list) {
return DEFAULT_JSON_PARSER.createJSONArray(list);
}
public static Object parseJSON(Object json) {
if (json instanceof Boolean || json instanceof Number || json instanceof Enum<?>) {
return json;
}
String s = StringUtil.trim(toJSONString(json));
if (s.startsWith("{")) {
return parseObject(json, DEFAULT_JSON_PARSER);
}
if (s.startsWith("[")) {
return parseArray(json, DEFAULT_JSON_PARSER);
}
throw new IllegalArgumentException("JSON 格式错误！" + s);
}
/**
* @param json
* @return
*/
public static Map<String, Object> parseObject(Object json) {
return parseObject(json, DEFAULT_JSON_PARSER);
}
public static <M extends Map<String, Object>, L extends List<Object>> M parseObject(Object json, JSONParser<M, L> parser) {
String s = toJSONString(json);
if (StringUtil.isEmpty(s, true)) {
return null;
}
return parser.parseObject(s);
}
public static <T> T parseObject(Object json, Class<T> clazz) {
return parseObject(json, clazz, DEFAULT_JSON_PARSER);
}
public static <T, M extends Map<String, Object>, L extends List<Object>> T parseObject(Object json, Class<T> clazz, JSONParser<M, L> parser) {
String s = toJSONString(json);
if (StringUtil.isEmpty(s, true)) {
return null;
}
return parser.parseObject(s, clazz);
}
/**
* @param json
* @return
*/
public static List<Object> parseArray(Object json) {
return parseArray(json, DEFAULT_JSON_PARSER);
}
public static <M extends Map<String, Object>, L extends List<Object>> L parseArray(Object json, JSONParser<M, L> parser) {
String s = toJSONString(json);
if (StringUtil.isEmpty(s, true)) {
return null;
}
try {
L arr = parser.parseArray(s);
return arr;
} catch (Exception e) {
Log.i(TAG, "parseArray catch \n" + e.getMessage());
}
return null;
}
public static <T> List<T> parseArray(Object json, Class<T> clazz) {
return parseArray(json, clazz, DEFAULT_JSON_PARSER);
}
public static <T, M extends Map<String, Object>, L extends List<Object>> List<T> parseArray(Object json, Class<T> clazz, JSONParser<M, L> parser) {
String s = toJSONString(json);
if (StringUtil.isEmpty(s, true)) {
return null;
}
try {
return parser.parseArray(s, clazz);
} catch (Exception e) {
Log.i(TAG, "parseArray catch \n" + e.getMessage());
}
return null;
}
/**
* @param obj
* @return
*/
public static String toJSONString(Object obj) {
if (obj == null) {
return null;
}
// In a real implementation, you would use a JSON parser library
// Here we're just providing a basic implementation to replace fastjson
try {
// For now, this is a placeholder. In a real implementation,
// you would convert the object to a JSON string
if (obj instanceof String) {
return (String) obj;
}
if (obj instanceof Map) {
// Simple JSON object format
StringBuilder sb = new StringBuilder("{");
@SuppressWarnings("unchecked")
Map<Object, Object> map = (Map<Object, Object>) obj;
boolean first = true;
for (Map.Entry<Object, Object> entry : map.entrySet()) {
if (! first) {
sb.append(",");
}
first = false;
sb.append("\"").append(entry.getKey()).append("\":");
Object value = entry.getValue();
if (value instanceof String) {
sb.append("\"").append(value).append("\"");
} else {
sb.append(toJSONString(value));
}
}
sb.append("}");
return sb.toString();
}
if (obj instanceof List) {
// Simple JSON array format
StringBuilder sb = new StringBuilder("[");
@SuppressWarnings("unchecked")
List<Object> list = (List<Object>) obj;
boolean first = true;
for (Object item : list) {
if (! first) {
sb.append(",");
}
first = false;
if (item instanceof String) {
sb.append("\"").append(item).append("\"");
} else {
sb.append(toJSONString(item));
}
}
sb.append("]");
return sb.toString();
}
return obj.toString();
}
catch (Exception e) {
Log.i(TAG, "toJSONString catch \n" + e.getMessage());
}
return null;
}
/**判断是否为JSONObject或JSONArray的isXxx方法名
* @param key
* @return
*/
public static boolean isJSONType(String key) {
return key != null && key.startsWith("is") && key.length() > 2 && key.contains("JSON");
}
public static boolean isBooleanOrNumberOrString(Object obj) {
return obj instanceof Boolean || obj instanceof Number || obj instanceof String;
}
/**
* Get a value from a Map and convert to the specified type
* @param map Source map
* @param key The key
* @param <T> Target type
* @return The converted value
*/
@SuppressWarnings("unchecked")
public static <T> T get(Map<String, Object> map, String key) {
return map == null || key == null ? null : (T) map.get(key);
}
/**
* Get a value from a Map and convert to the specified type
* @param list Source map
* @param index The key
* @param <T> Target type
* @return The converted value
*/
@SuppressWarnings("unchecked")
public static <T> T get(List<Object> list, int index) {
return list == null || index < 0 || index >= list.size() ? null : (T) list.get(index);
}
// /**
// * Get a value from a Map and convert to the specified type
// * @param map Source map
// * @param key The key
// * @param <T> Target type
// * @return The converted value
// */
// @SuppressWarnings("unchecked")
// public static <T> T get(List<T> list, int index) {
// return list == null || index < 0 || index >= list.size() ? null : list.get(index);
// }
/**
* Get a Map value from a Map
* @param map Source map
* @param key The key
* @return The Map value
* @throws UnsupportedDataTypeException If value is not a Map and cannot be converted
*/
@SuppressWarnings("unchecked")
public static Map<String, Object> getMap(Map<String, Object> map, String key) throws UnsupportedDataTypeException {
Object value = map == null || key == null ? null : map.get(key);
if (value == null) {
return null;
}
if (value instanceof Map) {
return (Map<String, Object>) value;
}
throw new UnsupportedDataTypeException("Value for key '" + key + "' is not a Map: " + value.getClass().getName());
}
/**
* Get a List value from a Map
* @param map Source map
* @param key The key
* @return The List value
* @throws UnsupportedDataTypeException If value is not a List and cannot be converted
*/
@SuppressWarnings("unchecked")
public static List<Object> getList(Map<String, Object> map, String key) throws UnsupportedDataTypeException {
Object value = map == null || key == null ? null : map.get(key);
if (value == null) {
return null;
}
if (value instanceof List) {
return (List<Object>) value;
}
throw new UnsupportedDataTypeException("Value for key '" + key + "' is not a List: " + value.getClass().getName());
}
/**
* Get an int value from a Map
* @param map Source map
* @param key The key
* @return The int value
* @throws UnsupportedDataTypeException If value cannot be converted to int
*/
public static Integer getInteger(Map<String, Object> map, String key) throws UnsupportedDataTypeException {
Object value = map == null || key == null ? null : map.get(key);
if (value == null) {
return null;
}
if (value instanceof Number) {
return ((Number) value).intValue();
}
if (value instanceof String) {
try {
return Integer.parseInt((String) value);
} catch (NumberFormatException e) {
throw new UnsupportedDataTypeException("Cannot convert String value '" + value + "' to int: " + e.getMessage());
}
}
throw new UnsupportedDataTypeException("Cannot convert value of type " + value.getClass().getName() + " to int");
}
/**
* Get an int value from a Map
* @param map Source map
* @param key The key
* @return The int value
* @throws UnsupportedDataTypeException If value cannot be converted to int
*/
public static int getIntValue(Map<String, Object> map, String key) throws UnsupportedDataTypeException {
Object value = map == null || key == null ? null : map.get(key);
if (value == null) {
return 0;
}
if (value instanceof Number) {
return ((Number) value).intValue();
}
if (value instanceof String) {
try {
return Integer.parseInt((String) value);
} catch (NumberFormatException e) {
throw new UnsupportedDataTypeException("Cannot convert String value '" + value + "' to int: " + e.getMessage());
}
}
throw new UnsupportedDataTypeException("Cannot convert value of type " + value.getClass().getName() + " to int");
}
/**
* Get an int value from a Map
* @param map Source map
* @param key The key
* @return The int value
* @throws UnsupportedDataTypeException If value cannot be converted to int
*/
public static Long getLong(Map<String, Object> map, String key) throws UnsupportedDataTypeException {
Object value = map == null || key == null ? null : map.get(key);
if (value == null) {
return null;
}
if (value instanceof Number) {
return ((Number) value).longValue();
}
if (value instanceof String) {
try {
return Long.parseLong((String) value);
} catch (NumberFormatException e) {
throw new UnsupportedDataTypeException("Cannot convert String value '" + value + "' to int: " + e.getMessage());
}
}
throw new UnsupportedDataTypeException("Cannot convert value of type " + value.getClass().getName() + " to int");
}
/**
* Get a long value from a Map
* @param map Source map
* @param key The key
* @return The long value
* @throws UnsupportedDataTypeException If value cannot be converted to long
*/
public static long getLongValue(Map<String, Object> map, String key) throws UnsupportedDataTypeException {
Object value = map == null || key == null ? null : map.get(key);
if (value == null) {
return 0;
}
if (value instanceof Number) {
return ((Number) value).longValue();
}
if (value instanceof String) {
try {
return Long.parseLong((String) value);
} catch (NumberFormatException e) {
throw new UnsupportedDataTypeException("Cannot convert String value '" + value + "' to long: " + e.getMessage());
}
}
throw new UnsupportedDataTypeException("Cannot convert value of type " + value.getClass().getName() + " to long");
}
/**
* Get a double value from a Map
* @param map Source map
* @param key The key
* @return The double value
* @throws UnsupportedDataTypeException If value cannot be converted to double
*/
public static Double getDouble(Map<String, Object> map, String key) throws UnsupportedDataTypeException {
Object value = map == null || key == null ? null : map.get(key);
if (value == null) {
return null;
}
if (value instanceof Number) {
return ((Number) value).doubleValue();
}
if (value instanceof String) {
try {
return Double.parseDouble((String) value);
} catch (NumberFormatException e) {
throw new UnsupportedDataTypeException("Cannot convert String value '" + value + "' to double: " + e.getMessage());
}
}
throw new UnsupportedDataTypeException("Cannot convert value of type " + value.getClass().getName() + " to double");
}
/**
* Get a double value from a Map
* @param map Source map
* @param key The key
* @return The double value
* @throws UnsupportedDataTypeException If value cannot be converted to double
*/
public static double getDoubleValue(Map<String, Object> map, String key) throws UnsupportedDataTypeException {
Object value = map == null || key == null ? null : map.get(key);
if (value == null) {
return 0;
}
if (value instanceof Number) {
return ((Number) value).doubleValue();
}
if (value instanceof String) {
try {
return Double.parseDouble((String) value);
} catch (NumberFormatException e) {
throw new UnsupportedDataTypeException("Cannot convert String value '" + value + "' to double: " + e.getMessage());
}
}
throw new UnsupportedDataTypeException("Cannot convert value of type " + value.getClass().getName() + " to double");
}
/**
* Get a boolean value from a Map
* @param map Source map
* @param key The key
* @return The boolean value
* @throws UnsupportedDataTypeException If value cannot be converted to boolean
*/
public static Boolean getBoolean(Map<String, Object> map, String key) throws UnsupportedDataTypeException {
Object value = map == null || key == null ? null : map.get(key);
if (value == null) {
return null;
}
if (value instanceof Boolean) {
return (Boolean) value;
}
if (value instanceof String) {
String str = ((String) value).toLowerCase();
if (str.equals("true") || str.equals("false")) {
return Boolean.parseBoolean(str);
}
throw new UnsupportedDataTypeException("Cannot convert String value '" + value + "' to boolean");
}
if (value instanceof Number) {
int intValue = ((Number) value).intValue();
if (intValue == 0 || intValue == 1) {
return intValue != 0;
}
throw new UnsupportedDataTypeException("Cannot convert Number value '" + value + "' to boolean. Only 0 and 1 are supported.");
}
throw new UnsupportedDataTypeException("Cannot convert value of type " + value.getClass().getName() + " to boolean");
}
/**
* Get a boolean value from a Map
* @param map Source map
* @param key The key
* @return The boolean value
* @throws UnsupportedDataTypeException If value cannot be converted to boolean
*/
public static boolean getBooleanValue(Map<String, Object> map, String key) throws UnsupportedDataTypeException {
Object value = map == null || key == null ? null : map.get(key);
if (value == null) {
return false;
}
if (value instanceof Boolean) {
return (Boolean) value;
}
if (value instanceof String) {
String str = ((String) value).toLowerCase();
if (str.equals("true") || str.equals("false")) {
return Boolean.parseBoolean(str);
}
throw new UnsupportedDataTypeException("Cannot convert String value '" + value + "' to boolean");
}
if (value instanceof Number) {
int intValue = ((Number) value).intValue();
if (intValue == 0 || intValue == 1) {
return intValue != 0;
}
throw new UnsupportedDataTypeException("Cannot convert Number value '" + value + "' to boolean. Only 0 and 1 are supported.");
}
throw new UnsupportedDataTypeException("Cannot convert value of type " + value.getClass().getName() + " to boolean");
}
/**
* Get a string value from a Map
* @param map Source map
* @param key The key
* @return The string value
*/
public static String getString(Map<String, Object> map, String key) {
Object value = map == null || key == null ? null : map.get(key);
if (value == null) {
return null;
}
return value.toString();
}
}