org.aoju.bus.extra.json.JsonUtils Maven / Gradle / Ivy
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package org.aoju.bus.extra.json;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONException;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.JSONLibDataFormatSerializer;
import com.alibaba.fastjson.serializer.SerializeConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import org.aoju.bus.core.lang.Symbol;
import org.aoju.bus.core.lang.exception.InstrumentException;
import org.aoju.bus.core.utils.StringUtils;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* fastjson工具类
*
* @author Kimi Liu
* @version 5.6.9
* @since JDK 1.8+
*/
public class JsonUtils {
private static final SerializeConfig config;
private static final SerializerFeature[] features = {
// 输出空置字段
SerializerFeature.WriteMapNullValue,
// list字段如果为null,输出为[],而不是null
SerializerFeature.WriteNullListAsEmpty,
// 数值字段如果为null,输出为0,而不是null
SerializerFeature.WriteNullNumberAsZero,
// Boolean字段如果为null,输出为false,而不是null
SerializerFeature.WriteNullBooleanAsFalse,
// 字符类型字段如果为null,输出为"",而不是null
SerializerFeature.WriteNullStringAsEmpty
};
static {
config = new SerializeConfig();
// 使用和json-lib兼容的日期输出格式
config.put(java.util.Date.class, new JSONLibDataFormatSerializer());
// 使用和json-lib兼容的日期输出格式
config.put(java.sql.Date.class, new JSONLibDataFormatSerializer());
}
public static String convertObjectToJSON(Object object) {
return JSON.toJSONString(object, config, features);
}
public static String toJSONNoFeatures(Object object) {
return JSON.toJSONString(object, config);
}
public static Object toBean(String text) {
return JSON.parse(text);
}
// 转换为数组
public static Object[] toArray(String text) {
return toArray(text, null);
}
// 转换为对象
public static T toBean(String text, Class clazz) {
return JSON.parseObject(text, clazz);
}
// 转换为数组
public static Object[] toArray(String text, Class clazz) {
return JSON.parseArray(text, clazz).toArray();
}
// 转换为List
public static List toList(String text, Class clazz) {
return JSON.parseArray(text, clazz);
}
/**
* 将string转化为序列化的json字符串
*
* @param text 文本内容
* @return json对象
*/
public static Object textToJson(String text) {
return JSON.parse(text);
}
/**
* json字符串转化为map
*
* @param 反射对象
* @param 反射对象
* @param text 文本内容
* @return json map
*/
public static Map stringToCollect(String text) {
return (Map) JSONObject.parseObject(text);
}
/**
* 转换JSON字符串为对象
*
* @param text 文本内容
* @param clazz 对象
* @return 对象
*/
public static Object convertJsonToObject(String text, Class clazz) {
return JSONObject.parseObject(text, clazz);
}
/**
* 将map转化为string
*
* @param 反射对象
* @param 反射对象
* @param map 对象
* @return 对象
*/
public static String collectToString(Map map) {
return JSONObject.toJSONString(map);
}
/**
* JSON转换为List
*
* @param 反射对象
* @param text json字符串
* @param clazz 对象
* @return the list
*/
public static List convertJsonToList(String text, Class clazz) {
List list = new ArrayList<>();
if (!text.equals("")) {
if (text.contains(Symbol.BRACE_LEFT) || text.contains(Symbol.BRACKET_LEFT)) {
text = text;
} else {
// 转码
try {
text = URLDecoder.decode(text, "utf-8");
} catch (UnsupportedEncodingException e) {
throw new InstrumentException(e);
}
}
JSON alljson = (JSON) JSON.parse(text);
List alljsonlist = JSON.toJavaObject(alljson, List.class);
for (int i = 0; i < alljsonlist.size(); i++) {
JSON json = alljsonlist.get(i);
try {
list.add(JSON.toJavaObject(json, (Class) clazz.newInstance().getClass()));
} catch (InstantiationException | IllegalAccessException e) {
throw new InstrumentException(e);
}
}
}
return list;
}
/**
* object为可以转换为JSON对象的入参,以及其他普通对象,包含基本类型和封装类型,
*
* @param object 对象
* @return json字符
*/
public static String toJson(Object object) {
try {
return JSON.toJSON(object).toString();
} catch (Exception e) {
throw new InstrumentException(e);
}
}
/**
* object为可以转换为JSON对象的入参,以及其他普通对象,
* 不包含基本类型和封装类型[String除外但要符合JSON规则]
*
* @param object 对象
* @return json字符
*/
public static JSON toJsonBean(Object object) {
try {
if (object == null) {
return null;
}
// 对象转换
return (JSON) JSON.toJSON(object);
} catch (ClassCastException e) {
// 类型失败后,转换为string类型
return JSON.parseObject("" + object.toString());
} catch (Exception e) {
throw new InstrumentException(e);
}
}
/**
* 暴力解析
*
* @param content 字符串
* @return the true/false
*/
public final static boolean isJson(String content) {
try {
if (StringUtils.isBlank(content)) {
return false;
}
JSON.parse(content);
} catch (JSONException ex) {
return false;
}
return true;
}
/**
* 判断字符串是否可以转化为json对象
*
* @param content 字符串
* @return the true/false
*/
public static boolean isJsonObject(String content) {
try {
if (StringUtils.isBlank(content)) {
return false;
}
JSONObject.parseObject(content);
} catch (JSONException e) {
return false;
}
return true;
}
/**
* 判断字符串是否可以转化为JSON数组
*
* @param content 字符串
* @return the true/false
*/
public static boolean isJsonArray(String content) {
try {
if (StringUtils.isBlank(content)) {
return false;
}
JSONArray.parseArray(content);
} catch (JSONException e) {
return false;
}
return true;
}
}
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