package com.lf.server.helper;
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import com.alibaba.fastjson.JSONObject;
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import com.fasterxml.jackson.core.JsonParser;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import java.io.IOException;
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import java.util.LinkedHashMap;
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import java.util.List;
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/**
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* Json帮助类
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* @author WWW
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*/
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public class JsonHelper {
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/**
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* json串,转为LinkedHashMap
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* @param json
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* @return
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* @throws IOException
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*/
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@SuppressWarnings("unchecked")
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public static LinkedHashMap<String, Object> json2Map(String json) throws IOException {
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ObjectMapper mapper = new ObjectMapper();
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mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true).configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
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return mapper.readValue(json, LinkedHashMap.class);
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}
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/**
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* 对象转json
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* @param obj
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* @return
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* @throws IOException
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*/
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public static String map2Json(Object obj) throws IOException {
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ObjectMapper mapper = new ObjectMapper();
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mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true).configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
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return mapper.writeValueAsString(obj);
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}
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/**
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* json串,转为List<LinkedHashMap<String, Object>>
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* @param json
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* @return
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* @throws IOException
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*/
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@SuppressWarnings("unchecked")
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public static List<LinkedHashMap<String, Object>> json2ListMap(String json) throws IOException {
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ObjectMapper mapper = new ObjectMapper();
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mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true).configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
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return mapper.readValue(json, List.class);
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}
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/**
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* 将json字符串转为对象
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* @param json
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* @param valueType
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* @param <T>
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* @return
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* @throws IOException
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*/
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public static <T> T json2Object(String json, Class<T> valueType) throws IOException {
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ObjectMapper mapper = new ObjectMapper();
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mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true).configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
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return mapper.readValue(json, valueType);
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}
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/**
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* fastjson 转对象
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*
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* @param obj
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* @param valueType
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* @param <T>
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* @return
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*/
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public static <T> T obj2Vo(Object obj, Class<T> valueType) {
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return JSONObject.parseObject(JSONObject.toJSONString(obj), valueType);
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}
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}
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