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* Copyright (c) 2015-2021 aoju.org and other contributors. *
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package org.aoju.bus.extra.json.provider;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import com.alibaba.fastjson.serializer.SerializerFeature;
import java.lang.reflect.Type;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
/**
* FastJson 解析器
*
* @author Kimi Liu
* @version 6.2.2
* @since JDK 1.8+
*/
public class FastJsonProvider extends AbstractJsonProvider {
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
};
/**
* 构造
*/
public FastJsonProvider() {
}
@Override
public String toJsonString(Object object) {
return JSON.toJSONString(object, FEATURES);
}
@Override
public String toJsonString(Object object, String format) {
return JSON.toJSONStringWithDateFormat(object, format, SerializerFeature.WriteDateUseDateFormat);
}
@Override
public T toPojo(String json, Class clazz) {
return JSON.parseObject(json, clazz);
}
@Override
public T toPojo(Map map, Class clazz) {
return JSON.parseObject(JSON.toJSONString(map), clazz);
}
@Override
public List toList(String json) {
return JSON.parseObject(json, LinkedList.class);
}
@Override
public List toList(String json, Class clazz) {
return JSON.parseArray(json, clazz);
}
@Override
public List toList(String json, Type type) {
TypeReference typeReference = new TypeReference() {
@Override
public Type getType() {
return type;
}
};
return JSON.parseObject(json, typeReference.getType());
}
@Override
public Map toMap(String json) {
return JSON.parseObject(json, Map.class);
}
@Override
public Map toMap(Object object) {
return toMap(JSON.toJSONString(object));
}
@Override
public T getValue(String json, String field) {
return (T) JSON.parseObject(json).get(field);
}
@Override
public boolean isJson(String json) {
try {
JSON.parseObject(json);
} catch (RuntimeException ex) {
try {
JSON.parseArray(json);
} catch (RuntimeException ex1) {
return false;
}
}
return true;
}
}
