82 lines
2.5 KiB
Java
82 lines
2.5 KiB
Java
package org.jcnc.jnotepad.util;
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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.core.util.DefaultIndenter;
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import com.fasterxml.jackson.core.util.DefaultPrettyPrinter;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.fasterxml.jackson.databind.SerializationFeature;
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import org.jcnc.jnotepad.controller.exception.AppException;
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import static com.fasterxml.jackson.core.util.DefaultIndenter.SYS_LF;
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/**
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* Jackson 解析器的外观类，主要提供 ObjectMapper 对象。
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*
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* <p>该类用于封装 Jackson 对象映射工具的配置和操作。</p>
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*
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* @author songdragon
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*/
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public class JsonUtil {
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public static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
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static {
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OBJECT_MAPPER.enable(SerializationFeature.INDENT_OUTPUT);
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DefaultPrettyPrinter prettyPrinter = new DefaultPrettyPrinter();
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DefaultIndenter di = new DefaultIndenter(" ", SYS_LF);
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prettyPrinter.indentArraysWith(di);
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prettyPrinter.indentObjectsWith(di);
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OBJECT_MAPPER.setDefaultPrettyPrinter(prettyPrinter);
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}
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private JsonUtil() {
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}
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/**
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* 将对象转换为 JSON 字符串。
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*
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* @param o 要转换的对象
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* @return 对象的 JSON 表示
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* @throws AppException 如果转换失败
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*/
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public static String toJsonString(Object o) {
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try {
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return OBJECT_MAPPER.writeValueAsString(o);
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} catch (JsonProcessingException e) {
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throw new AppException(e);
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}
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}
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/**
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* 将json字符串解析成对象
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*
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* @param json json字符串
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* @param clazz 对象类型
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* @return 对象
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* @throws AppException 如果解析失败
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*/
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public static <T> T fromJsonString(String json, Class<T> clazz) {
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try {
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return OBJECT_MAPPER.readValue(json, clazz);
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} catch (JsonProcessingException e) {
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throw new AppException(e);
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}
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}
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/**
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* 将json字符串解析成对象
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*
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* @param json json字符串
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* @param valueTypeRef 值 类型 引用
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* @return 对象
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* @throws AppException 如果解析失败
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*/
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public static <T> T fromJsonString(String json, TypeReference<T> valueTypeRef) {
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try {
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return OBJECT_MAPPER.readValue(json, valueTypeRef);
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} catch (JsonProcessingException e) {
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throw new AppException(e);
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}
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}
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}
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