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@@ -1,227 +0,0 @@
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-/*
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- * *************************************************
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- * Copyright (c) 2018 QMTH. All Rights Reserved.
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- * Created by Deason on 2018-10-17 15:18:02.
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- * *************************************************
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- */
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-
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-package cn.com.qmth.examcloud.core.print.common.utils;
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-
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-import com.fasterxml.jackson.annotation.JsonInclude.Include;
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-import com.fasterxml.jackson.core.JsonProcessingException;
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-import com.fasterxml.jackson.core.type.TypeReference;
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-import com.fasterxml.jackson.databind.*;
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-import com.fasterxml.jackson.databind.util.JSONPObject;
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-import org.apache.commons.lang3.StringUtils;
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-import org.slf4j.Logger;
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-import org.slf4j.LoggerFactory;
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-
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-import java.io.IOException;
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-import java.util.Collection;
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-import java.util.HashMap;
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-import java.util.List;
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-import java.util.Map;
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-
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-/**
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- * 简单封装Jackson,实现JSON 与 Java Object互相转换的Mapper
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- * 封装不同的输出风格, 使用不同的builder函数创建实例
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- *
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- * @author: QMTH
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- * @since: 2018/10/17
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- */
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-@SuppressWarnings("unchecked")
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-public class JsonMapper {
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- private static Logger log = LoggerFactory.getLogger(JsonMapper.class);
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- private ObjectMapper mapper;
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-
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- public JsonMapper() {
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- this(null);
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- }
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-
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- public JsonMapper(Include include) {
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- mapper = new ObjectMapper();
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- //设置输出时包含属性的风格
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- if (include != null) {
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- mapper.setSerializationInclusion(include);
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- }
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- //设置输入时忽略在JSON字符串中存在但Java对象实际没有的属性
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- mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
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- }
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-
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- /**
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- * 创建只输出非Null且非Empty(如List.isEmpty)的属性到Json字符串的Mapper,建议在外部接口中使用
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- */
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- public static JsonMapper nonEmptyMapper() {
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- return new JsonMapper(Include.NON_EMPTY);
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- }
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-
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- public static JsonMapper nonNullMapper() {
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- return new JsonMapper(Include.NON_NULL);
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- }
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-
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- /**
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- * 创建只输出初始值被改变的属性到Json字符串的Mapper, 最节约的存储方式,建议在内部接口中使用
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- */
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- public static JsonMapper nonDefaultMapper() {
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- return new JsonMapper(Include.NON_DEFAULT);
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- }
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-
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- /**
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- * Object可以是POJO,也可以是Collection或数组
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- * 如果对象为Null, 返回"null"
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- * 如果集合为空集合, 返回"[]"
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- */
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- public String toJson(Object object) {
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- try {
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- return mapper.writeValueAsString(object);
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- } catch (IOException e) {
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- log.error("write to json string error:" + object);
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- return null;
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- }
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- }
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-
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- /**
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- * 反序列化POJO或简单Collection如List<String>
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- * 如果JSON字符串为Null或"null"字符串, 返回Null
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- * 如果JSON字符串为"[]", 返回空集合
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- * 如需反序列化复杂Collection如List<MyBean>, 请使用fromJson(String, JavaType)
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- */
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- public <T> T fromJson(String jsonString, Class<T> clazz) {
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- if (StringUtils.isEmpty(jsonString)) {
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- return null;
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- }
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- try {
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- return mapper.readValue(jsonString, clazz);
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- } catch (IOException e) {
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- log.error("parse json string error", e);
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- return null;
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- }
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- }
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-
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- /**
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- * 反序列化复杂Collection如List<Bean>, 先使用createCollectionType()或constructMapType()构造类型, 然后调用本函数
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- */
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- public <T> T fromJson(String jsonString, JavaType javaType) {
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- if (StringUtils.isEmpty(jsonString)) {
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- return null;
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- }
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- try {
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- return (T) mapper.readValue(jsonString, javaType);
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- } catch (IOException e) {
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- log.error("parse json string error", e);
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- return null;
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- }
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- }
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-
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- /**
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- * 反序列化复杂的对象,如Page<Bean>
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- */
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- public <T> T fromJson(String jsonString, TypeReference javaType) {
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- if (StringUtils.isEmpty(jsonString)) {
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- return null;
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- }
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- try {
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- return (T) mapper.readValue(jsonString, javaType);
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- } catch (IOException e) {
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- log.error("parse json string error", e);
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- return null;
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- }
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- }
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-
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- /**
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- * json to list
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- */
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- public <T> List<T> toList(String jsonString, Class<T> bean) {
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- if (StringUtils.isEmpty(jsonString)) {
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- return null;
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- }
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- try {
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- JavaType javaType = constructCollectionType(List.class, bean);
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- return mapper.readValue(jsonString, javaType);
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- } catch (IOException e) {
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- log.error("parse json string error", e);
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- return null;
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- }
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- }
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-
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- /**
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- * json to simple HashMap
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- */
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- public <T> Map<String, T> toHashMap(String jsonString, Class<T> bean) {
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- if (StringUtils.isEmpty(jsonString)) {
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- return null;
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- }
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- try {
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- JavaType javaType = constructMapType(HashMap.class, String.class, bean);
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- return mapper.readValue(jsonString, javaType);
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- } catch (IOException e) {
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- log.error("parse json string error:", e);
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- return null;
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- }
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- }
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-
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- /**
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- * 构造Collection类型
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- */
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- public JavaType constructCollectionType(Class<? extends Collection> collectionClass, Class<?> elementClass) {
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- return mapper.getTypeFactory().constructCollectionType(collectionClass, elementClass);
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- }
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-
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- /**
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- * 构造Map类型
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- */
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- public JavaType constructMapType(Class<? extends Map> mapClass, Class<?> keyClass, Class<?> valueClass) {
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- return mapper.getTypeFactory().constructMapType(mapClass, keyClass, valueClass);
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- }
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-
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- /**
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- * 当JSON里只含有Bean的部分屬性時,更新一個已存在Bean,只覆盖該部分的屬性
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- */
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- public void update(String jsonString, Object object) {
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- try {
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- mapper.readerForUpdating(object).readValue(jsonString);
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- } catch (JsonProcessingException e) {
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- log.error("update json string:" + jsonString + " to object:" + object + " error.");
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- } catch (IOException e) {
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- log.error("update json string:" + jsonString + " to object:" + object + " error.");
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- }
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- }
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-
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- /**
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- * 輸出JSONP格式数据
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- */
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- public String toJsonP(String functionName, Object object) {
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- return toJson(new JSONPObject(functionName, object));
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- }
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-
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- /**
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- * 設定是否使用Enum的toString函數來读写Enum
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- * 為False時使用Enum的name()函數來读写Enum, 默認為False
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- * 注意本函數一定要在Mapper創建後, 所有的读写動作之前調用
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- */
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- public void enableEnumUseToString() {
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- mapper.enable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING);
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- mapper.enable(DeserializationFeature.READ_ENUMS_USING_TO_STRING);
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- }
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-
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- /**
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- * 取出Mapper做进一步的设置或使用其他序列化API
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- */
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- public ObjectMapper getMapper() {
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- return mapper;
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- }
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-
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- /***
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- * 把Json字符串转换成Node对象
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- */
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- public JsonNode getNode(String jsonStr) {
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- try {
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- //mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_CONTROL_CHARS, true);
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- return mapper.readTree(jsonStr);
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- } catch (IOException e) {
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- log.error(e.getMessage(), e);
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- return null;
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- }
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- }
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-
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-}
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