mirror of
https://github.com/continew-org/continew-starter.git
synced 2025-10-31 22:57:19 +08:00
refactor(json/jackson): 重构 JSON 工具类
- 修改了 JSONUtils 类的多个方法名称，使其更加清晰 - 添加了新的方法来处理 JSON 数组转换 - 优化了异常处理，引入了专门的 JSONException 类 - 调整了部分方法的参数和返回类型，提高灵活性
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@@ -346,8 +346,8 @@ public class ServletUtils extends JakartaServletUtil {
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* @since 2.13.1
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* @see #write(HttpServletResponse, String, String)
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*/
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public static void writeJSON(HttpServletResponse response, Object data) {
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write(response, JSONUtil.toJsonStr(data), MediaType.APPLICATION_JSON_VALUE);
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public static void writeJSON(HttpServletResponse response, String data) {
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write(response, data, MediaType.APPLICATION_JSON_VALUE);
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}
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/**
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@@ -0,0 +1,48 @@
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/*
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* Copyright (c) 2022-present Charles7c Authors. All Rights Reserved.
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* <p>
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* Licensed under the GNU LESSER GENERAL PUBLIC LICENSE 3.0;
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* <p>
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* http://www.gnu.org/licenses/lgpl.html
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* <p>
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package top.continew.starter.json.jackson.exception;
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import top.continew.starter.core.exception.BaseException;
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import java.io.Serial;
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/**
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* JSON 异常
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*
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* @author Charles7c
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* @since 2.13.2
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*/
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public class JSONException extends BaseException {
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@Serial
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private static final long serialVersionUID = 1L;
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public JSONException() {
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}
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public JSONException(String message) {
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super(message);
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}
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public JSONException(Throwable cause) {
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super(cause);
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}
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public JSONException(String message, Throwable cause) {
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super(message, cause);
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}
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}
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@@ -27,7 +27,9 @@ import java.util.Map;
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import java.util.Objects;
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/**
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* json 构建工具
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* JSON 构建工具
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*
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* @see ObjectMapper
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*
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* @author echo
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* @since 2.11.0
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@@ -19,33 +19,33 @@ package top.continew.starter.json.jackson.util;
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import cn.hutool.core.text.CharSequenceUtil;
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import cn.hutool.extra.spring.SpringUtil;
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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.JsonNode;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import top.continew.starter.json.jackson.exception.JSONException;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Map;
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/**
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* json 工具
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* JSON 工具类
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*
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* @see ObjectMapper
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* @see cn.hutool.json.JSONUtil
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*
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* @author echo
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* @author Charles7c
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* @since 2.11.0
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*/
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public class JSONUtils {
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private static final ObjectMapper OBJECT_MAPPER = SpringUtil.getBean(ObjectMapper.class);
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private JSONUtils() {
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}
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/**
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* Jackson 对象映射器，用于 JSON 解析与序列化。
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*/
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private static final ObjectMapper OBJECT_MAPPER = SpringUtil.getBean(ObjectMapper.class);
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/**
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* 获取 Jackson 对象映射器。
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* 获取 Jackson 对象映射器
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*
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* @return {@link ObjectMapper} Jackson 对象映射器
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*/
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@@ -54,183 +54,136 @@ public class JSONUtils {
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}
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/**
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* 对象转为 json 字符串
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* 转换对象为JsonNode<br>
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*
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* @param object 对象
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* @return {@link String }
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* @param obj 对象
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* @return JsonNode
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*/
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public static String toJsonStr(Object object) {
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if (object == null) {
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public static JsonNode parseObj(Object obj) {
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if (obj == null) {
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return null;
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}
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try {
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return OBJECT_MAPPER.writeValueAsString(object);
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} catch (JsonProcessingException e) {
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throw new RuntimeException(e);
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}
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return OBJECT_MAPPER.valueToTree(obj);
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}
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/**
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* 将对象转换为 JsonNode。
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* 转换为JSON字符串
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*
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* @param obj 需要转换的对象
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* @return 转换后的 {@link JsonNode}，如果 obj 为空，则返回 null
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* @param obj 被转为JSON的对象
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* @return JSON字符串
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*/
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public static JsonNode toJson(Object obj) {
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public static String toJsonStr(Object obj) {
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if (obj == null) {
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return null;
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}
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try {
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return OBJECT_MAPPER.valueToTree(obj);
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} catch (IllegalArgumentException e) {
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throw new IllegalArgumentException(e);
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}
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}
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/**
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* 将 List 转换为 JsonNode。
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*
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* @param list 输入的 List
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* @return 转换后的 {@link JsonNode}
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*/
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public static JsonNode listToJson(List<?> list) {
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return toJson(list);
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}
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/**
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* 将 Map 转换为 JsonNode。
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*
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* @param map 输入的 Map
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* @return 转换后的 {@link JsonNode}
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*/
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public static JsonNode mapToJson(Map<?, ?> map) {
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return toJson(map);
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}
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/**
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* 将 JsonNode 转换为 List<String>，用于环境变量格式解析。
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*
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* @param jsonNode 需要转换的 JsonNode
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* @return 转换后的 List<String>
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*/
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public static List<String> jsonToEnvList(JsonNode jsonNode) {
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if (jsonNode == null || jsonNode.isNull()) {
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return new ArrayList<>();
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}
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List<String> envList = new ArrayList<>();
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jsonNode.fields().forEachRemaining(field -> {
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String key = field.getKey();
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JsonNode valueNode = field.getValue();
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String value = valueNode.isValueNode() ? valueNode.asText() : valueNode.toString();
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envList.add(key + "=" + value);
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});
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return envList;
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}
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/**
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* 将 JsonNode 转换为 List<String>。
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*
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* @param jsonNode 需要转换的 JsonNode
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* @return 转换后的 List<String>
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*/
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public static List<String> jsonToStringList(JsonNode jsonNode) {
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if (jsonNode == null || jsonNode.isNull()) {
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return new ArrayList<>();
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}
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try {
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return OBJECT_MAPPER.convertValue(jsonNode, new TypeReference<>() {
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});
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} catch (IllegalArgumentException e) {
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throw new IllegalArgumentException(e);
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}
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}
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/**
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* 将 JsonNode 转换为指定类型的 Java 对象。
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*
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* @param jsonNode JSON 数据
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* @param clazz 目标 Java 类
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* @return 解析后的 Java 对象
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*/
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public static <T> T fromJson(JsonNode jsonNode, Class<T> clazz) {
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try {
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return OBJECT_MAPPER.treeToValue(jsonNode, clazz);
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return OBJECT_MAPPER.writeValueAsString(obj);
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} catch (JsonProcessingException e) {
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throw new RuntimeException(e);
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throw new JSONException(e);
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}
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}
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/**
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* 解析 JSON 字符串为 Java 对象。
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* JSON字符串转为实体类对象，转换异常将被抛出
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*
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* @param str JSON 字符串
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* @param clazz 目标 Java 类
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* @return 解析后的 Java 对象
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* @param <T> Bean类型
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* @param jsonString JSON字符串
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* @param beanClass 实体类对象
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* @return 实体类对象
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*/
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public static <T> T parseObject(String str, Class<T> clazz) {
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if (CharSequenceUtil.isEmpty(str)) {
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public static <T> T toBean(String jsonString, Class<T> beanClass) {
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if (CharSequenceUtil.isBlank(jsonString)) {
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return null;
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}
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try {
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return OBJECT_MAPPER.readValue(str, clazz);
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return OBJECT_MAPPER.readValue(jsonString, beanClass);
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} catch (IOException e) {
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throw new RuntimeException(e);
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throw new JSONException(e);
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}
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}
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/**
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* 字符串 解析为 list<T>
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* 将JSON字符串转换为Bean的List，默认为ArrayList
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*
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* @param str 字符串
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* @param clazz 目标 Java 类
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* @return 解析后的 List<T>
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* @param jsonStr 需要转换的JSON字符串
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* @param elementType 列表元素类型
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* @return 转换后的 List
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* @since 2.13.2
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*/
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public static <T> List<T> parseArray(String str, Class<T> clazz) {
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if (CharSequenceUtil.isEmpty(str)) {
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return new ArrayList<>();
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public static <T> List<T> toList(String jsonStr, Class<T> elementType) {
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if (jsonStr == null || jsonStr.trim().isEmpty()) {
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return new ArrayList<>(0);
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}
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try {
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return OBJECT_MAPPER.readValue(str, OBJECT_MAPPER.getTypeFactory()
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.constructCollectionType(List.class, clazz));
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return OBJECT_MAPPER.readValue(jsonStr, OBJECT_MAPPER.getTypeFactory()
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.constructCollectionType(List.class, elementType));
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} catch (IOException e) {
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throw new RuntimeException(e);
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throw new JSONException("Failed to parse JSON string to list", e);
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}
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}
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/**
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* 判断字符串是否为 JSON 格式。
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* 将JSONArray转换为Bean的List，默认为ArrayList
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*
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* @param jsonNode 需要转换的 JsonNode
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* @param elementType 列表元素类型
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* @return 转换后的 List
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* @since 2.13.2
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*/
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public static <T> List<T> toList(JsonNode jsonNode, Class<T> elementType) {
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if (jsonNode == null || jsonNode.isNull()) {
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return new ArrayList<>(0);
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}
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try {
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return OBJECT_MAPPER.convertValue(jsonNode, OBJECT_MAPPER.getTypeFactory()
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.constructCollectionType(List.class, elementType));
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} catch (IllegalArgumentException e) {
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throw new JSONException("Failed to convert JSON to list", e);
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}
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}
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/**
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* 是否为JSON类型字符串，首尾都为大括号或中括号判定为JSON字符串
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*
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* @param str 字符串
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* @return 是否为 JSON 格式
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* @return 是否为JSON类型字符串
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* @since 2.13.2
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* @see cn.hutool.json.JSONUtil#isTypeJSON(String)
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* @author Looly（<a href="https://gitee.com/dromara/hutool">Hutool</a>）
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*/
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public static boolean isTypeJSON(String str) {
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if (CharSequenceUtil.isEmpty(str)) {
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return false;
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}
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try {
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OBJECT_MAPPER.readTree(str);
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return true;
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} catch (IOException e) {
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return false;
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}
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return isTypeJSONObject(str) || isTypeJSONArray(str);
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}
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/**
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* 将 JSON 字符串转换为指定类型的 Java 对象。
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* 是否为JSONObject类型字符串，首尾都为大括号判定为JSONObject字符串
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*
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* @param str 字符串
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* @param clazz 目标对象的 Class 类型
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* @return 解析后的 Java 对象
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* @param str 字符串
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* @return 是否为JSON字符串
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* @since 2.13.2
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* @see cn.hutool.json.JSONUtil#isTypeJSONObject(String)
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* @author Looly（<a href="https://gitee.com/dromara/hutool">Hutool</a>）
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*/
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public static <T> T toBean(String str, Class<T> clazz) {
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if (CharSequenceUtil.isEmpty(str)) {
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return null;
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}
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try {
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return OBJECT_MAPPER.readValue(str, clazz);
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} catch (IOException e) {
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throw new RuntimeException(e);
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public static boolean isTypeJSONObject(String str) {
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if (CharSequenceUtil.isBlank(str)) {
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return false;
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}
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return CharSequenceUtil.isWrap(CharSequenceUtil.trim(str), '{', '}');
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}
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/**
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* 是否为JSONArray类型的字符串，首尾都为中括号判定为JSONArray字符串
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*
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* @param str 字符串
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* @return 是否为JSONArray类型字符串
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* @since 2.13.2
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* @see cn.hutool.json.JSONUtil#isTypeJSONArray(String)
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* @author Looly（<a href="https://gitee.com/dromara/hutool">Hutool</a>）
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*/
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public static boolean isTypeJSONArray(String str) {
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if (CharSequenceUtil.isBlank(str)) {
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return false;
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}
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return CharSequenceUtil.isWrap(CharSequenceUtil.trim(str), '[', ']');
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}
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}
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