JsonUtils.java
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package com.ruoyi.common.utils;
import cn.hutool.core.lang.Dict;
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.ObjectUtil;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.exc.MismatchedInputException;
import com.ruoyi.common.utils.spring.SpringUtils;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* JSON 工具类
*
* @author 芋道源码
*/
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public class JsonUtils {
private static final ObjectMapper OBJECT_MAPPER = SpringUtils.getBean(ObjectMapper.class);
public static ObjectMapper getObjectMapper() {
return OBJECT_MAPPER;
}
public static String toJsonString(Object object) {
if (ObjectUtil.isNull(object)) {
return null;
}
try {
return OBJECT_MAPPER.writeValueAsString(object);
} catch (JsonProcessingException e) {
throw new RuntimeException(e);
}
}
public static <T> T parseObject(String text, Class<T> clazz) {
if (StringUtils.isEmpty(text)) {
return null;
}
try {
return OBJECT_MAPPER.readValue(text, clazz);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static <T> T parseObject(byte[] bytes, Class<T> clazz) {
if (ArrayUtil.isEmpty(bytes)) {
return null;
}
try {
return OBJECT_MAPPER.readValue(bytes, clazz);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static <T> T parseObject(String text, TypeReference<T> typeReference) {
if (StringUtils.isBlank(text)) {
return null;
}
try {
return OBJECT_MAPPER.readValue(text, typeReference);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static Dict parseMap(String text) {
if (StringUtils.isBlank(text)) {
return null;
}
try {
return OBJECT_MAPPER.readValue(text, OBJECT_MAPPER.getTypeFactory().constructType(Dict.class));
} catch (MismatchedInputException e) {
// 类型不匹配说明不是json
return null;
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static List<Dict> parseArrayMap(String text) {
if (StringUtils.isBlank(text)) {
return null;
}
try {
return OBJECT_MAPPER.readValue(text, OBJECT_MAPPER.getTypeFactory().constructCollectionType(List.class, Dict.class));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static <T> List<T> parseArray(String text, Class<T> clazz) {
if (StringUtils.isEmpty(text)) {
return new ArrayList<>();
}
try {
return OBJECT_MAPPER.readValue(text, OBJECT_MAPPER.getTypeFactory().constructCollectionType(List.class, clazz));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}