导包
implementation 'com.alibaba:fastjson:1.2.48'
方法
//FastKtx方法
toAny :json 转任意类
toMap :json 转 Map
toList : json 转 List
toJson : 任意类转 json
//扩展函数
toAny :json 转任意类
toMap :json 转 Map
toList : json 转 List
toJson : 任意类转 json
注意事项
使用时涉及到泛型相关,泛型 T 要转的类必须要有无参构造方法,一般 Java 默认就有,如果使用 Kotlin 就需要注意了,设置默认值是无效的,下面这种才有效:
class TestJ constructor(){
var name: String? = null
var isSuccess = false
}
封装类
//json -> any
inline fun <reified T> String?.toAny() = FastKtx.toAny<T>(this)
fun <T> String?.toAny(tClass: Class<T>?) = FastKtx.toAny(this, tClass)
//json -> map
fun <T> String?.toMap() = FastKtx.toMap<Map<String, T>>(this)
//json -> list
inline fun <reified T> String?.toList() = FastKtx.toList<T>(this)
fun <T> String?.toList(tClass: Class<T>?) = FastKtx.toList(this, tClass)
//any -> json
fun Any?.toJson() = FastKtx.toJson(this)
object FastKtx {
/**
*json -----> T
* @param T
* @param json
* @param tClass
* @return
*/
inline fun <reified T> toAny(json: String?): T? {
return toAny(json, T::class.java)
}
fun <T> toAny(json: String?, tClass: Class<T>?): T? {
if (json.isNullOrEmpty()) return null
return try {
JSON.parseObject(json, tClass)
} catch (e: Exception) {
null
}
}
/**
*json ----> map
* @param T
* @param json
* @return
*/
fun <T> toMap(json: String?): Map<String, T>? {
if (json.isNullOrEmpty()) return null
try {
return JSON.parseObject<Map<String, T>>(json, MutableMap::class.java)
} catch (e: Exception) {
}
return null
}
/**
*json -----> list
* @param T
* @param json
* @param tClass
* @return
*/
inline fun <reified T> toList(json: String?): List<T>? {
return toList(json, T::class.java)
}
fun <T> toList(json: String?, tClass: Class<T>?): List<T>? {
if (json.isNullOrEmpty()) return null
return try {
JSON.parseArray(json, tClass)
} catch (e: Exception) {
null
}
}
/**
*any -----> json
* @param any
* @return
*/
fun toJson(any: Any?): String? {
return try {
JSON.toJSONString(any)
} catch (e: Exception) {
null
}
}
}